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  • Mice  (190)
  • Time Factors  (53)
  • American Association for the Advancement of Science (AAAS)  (236)
  • 1980-1984  (236)
  • 2005
  • 1983  (129)
  • 1981  (107)
Collection
Keywords
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  • American Association for the Advancement of Science (AAAS)  (236)
  • Springer  (4)
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  • 1
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    Testosterone: a major determinant of extragenital sexual dimorphism (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-03-20
    Description: Sexual dimorphism in selected extragenital tissues is described with emphasis on the molecular basis of the differences. Testosterone rather than 5 alpha-dihydrotestosterone appears to be the major intracellular androgen in organs other than skin and reproductive tract, but other steroid metabolites and their receptors are required to produce the diverse tissue differences observed in males and females. There is also evidence that multiple hormones from several endocrine glands are required to act in concert with androgens to produce and maintain their effects. Although many of the consequences of sexual dimorphism, such as body size and strength, have been evident for centuries, other differences between males and females such as disease incidence, response to drugs and toxins, and the metabolism and assimilation of dietary constituents have only recently been discovered.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bardin, C W -- Catterall, J F -- HD-13541/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1981 Mar 20;211(4488):1285-94.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7010603" target="_blank"〉PubMed〈/a〉
    Keywords: Androgen-Insensitivity Syndrome/metabolism ; Androgens/metabolism/physiology ; Animals ; Erythropoiesis ; Estradiol/physiology ; Humans ; Kidney/metabolism ; Liver/metabolism ; Male ; Mice ; Muscles/metabolism ; Progestins/physiology ; Proteins/secretion ; Rats ; Receptors, Androgen/metabolism ; *Sex Differentiation ; Testosterone/metabolism/*physiology ; Transcription, Genetic
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 2
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    GABA analogues activate channels of different duration on cultured mouse spinal neurons (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-04-17
    Description: Voltage-clamp recordings from mouse spinal neurons grown in culture were used to study the membrane current fluctuations induced by 12 substances structurally similar to gamma-aminobutyric acid (GABA). Fluctuation analysis provided estimates of the electrical properties of the elementary events underlying these responses. Estimates of the mean conductance of channels activated by all of the substances except glycine did not differ significantly from that estimated for GABA, whereas mean durations of agonist-activated channels all differed significantly from that found for GABA. The results indicate that all of the substances tested except glycine activate channels of similar conductance but of different durations.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barker, J L -- Mathers, D A -- New York, N.Y. -- Science. 1981 Apr 17;212(4492):358-61.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6259733" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Membrane/drug effects ; Ion Channels/*drug effects ; Membrane Potentials/drug effects ; Mice ; Neurons/drug effects ; Receptors, Cell Surface/metabolism ; Receptors, GABA-A ; Spinal Nerves/*drug effects ; Structure-Activity Relationship ; Time Factors ; gamma-Aminobutyric Acid/*analogs & derivatives/pharmacology
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
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    Morphiceptin (NH4-tyr-pro-phe-pro-COHN2): a potent and specific agonist for morphine (mu) receptors (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-04-03
    Description: The synthetic peptide NH2-Tyr-Pro-Phe-Pro-CONH2 (morphiceptin), which is the amide of a fragment of the milk protein beta-casein, has morphinelike activities and is highly specific for morphine (mu) receptors but not for enkephalin (delta) receptors. It is as active as morphine in the guinea pig ileum but much less active in the mouse and rat vas deferens. The discovery of this specific morphine receptor ligand substantiates the hypothesis of multiple opiate receptors. The ligand, which may be of physiological significance since a very similar, or identical, activity can be detected in enzymatic digests of beta-casein, may prove useful for further investigation of the functions of opiate receptor subtypes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chang, K J -- Lillian, A -- Hazum, E -- Cuatrecasas, P -- Chang, J K -- New York, N.Y. -- Science. 1981 Apr 3;212(4490):75-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6259732" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Binding, Competitive ; Caseins/pharmacology ; Dihydromorphine/metabolism ; Endorphins/*pharmacology ; Enkephalins/metabolism ; Guanosine Triphosphate/pharmacology ; Guinea Pigs ; Ileum/drug effects ; Male ; Mice ; Naloxone/metabolism ; Rats ; Receptors, Opioid/*drug effects ; Sodium/pharmacology ; Vas Deferens/drug effects
    Print ISSN: 0036-8075
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  • 4
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    Stepwise sarcomere shortening: analysis by high-speed cinemicrography (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-09-25
    Description: Sarcomere shortening in striated muscle appears to follow a regionally synchronized staircase-like time course not anticipated in some cross-bridge models. The visualization method used has been criticized as subject to Bragg diffraction effects. Two independent optical methods were used to visualize a muscle during contraction; agreement between the stepwise behavior observed with the two methods suggests that the phenomenon is genuine.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Delay, M J -- Ishide, N -- Jacobson, R C -- Pollack, G H -- Tirosh, R -- New York, N.Y. -- Science. 1981 Sep 25;213(4515):1523-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7280674" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Motion Pictures as Topic ; *Muscle Contraction ; Muscles/*ultrastructure ; Ranidae ; Time Factors
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 5
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    Melatonin: identification of sites of antigonadal action in mouse brain (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-11-13
    Description: Long-term implants releasing a small quantity of melatonin (45 nanograms per day) were used to determine the brain sites of the hormone's antigonadal action in a photoperiodic species, the white-footed mouse (Peromyscus leucopus). Implants in the medial preoptic and supra- and retrochiasmatic areas elicited completed gonadal regression after 7 weeks. Implants in other brain regions had little effect on the animals' reproductive state.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Glass, J D -- Lynch, G R -- NS-15503/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1981 Nov 13;214(4522):821-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7292016" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Female ; Genitalia, Female/drug effects/*pathology ; Hypothalamus/*drug effects ; Light ; Melatonin/*pharmacology ; Mice ; Periodicity ; Preoptic Area/drug effects ; Supraoptic Nucleus/drug effects
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  • 6
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    Renin and angiotensin: the complete system within the neuroblastoma x glioma cell (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-11-20
    Description: Cells of the homogeneous hybrid line neuroblastoma x glioma (NG108-15) have many neuronal properties. Immunocytochemical tests show that they contain both immunoreactive renin and angiotensin; direct radioimmunoassays show that they are positive for renin, angiotensin I, and angiotensin II; enzymatic assays show that they contain angiotensinogen and converting enzyme as well. The renin appears to be present in an enzymatically inactive form that can be activated by trypsin and then blocked by antiserum to purified mouse submaxillary renin. Renin concentration and activity are increased by enhancing cellular differentiation with dibutyryl cyclic adenosine monophosphate or by serum withdrawal. These findings demonstrate a complete renin-angiotensin system within these neuron-like cells, and suggest that activation of intracellular renin could generate angiotensin II.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fishman, M C -- Zimmerman, E A -- Slater, E E -- HL-21247/HL/NHLBI NIH HHS/ -- HL-24105/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1981 Nov 20;214(4523):921-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6272392" target="_blank"〉PubMed〈/a〉
    Keywords: Angiotensin I/*analysis ; Angiotensin II/*analysis ; Angiotensins/*analysis ; Animals ; Cell Line ; Cricetinae ; Glioma/*metabolism ; Hybrid Cells/*metabolism ; Mice ; Neuroblastoma/*metabolism ; Peptidyl-Dipeptidase A/metabolism ; Radioimmunoassay ; Rats ; Renin/*metabolism
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  • 7
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    Phenytoin-induced teratogenesis: a mouse model (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-01-30
    Description: Malformations associated with the fetal hydantoin syndrome have been reproduced in a mouse model. The occurrence of these defects was correlated with maternal serum concentrations, but not with maternal or fetal genotype or the presence of a seizure disorder.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Finnell, R H -- New York, N.Y. -- Science. 1981 Jan 30;211(4481):483-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7455686" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Disease Models, Animal ; Epilepsy/drug therapy ; Female ; Mice ; Mice, Neurologic Mutants/physiology ; Phenytoin/*adverse effects ; *Teratogens
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  • 8
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    Increased intracranial self-stimulation in rats after long-term administration of desipramine (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-11-06
    Description: The effects of long- and short-term administration of the tricyclic antidepressant desipramine on intracranial self-stimulation in rats were studied with electrodes in the A10 region of the dopamine-containing cell bodies of the ventromedial tegmentum. Long-term desipramine administration resulted in a significant shift to the left in the ascending portion of the rate--current intensity function, indicating that the activity of the mesolimbic dopamine system was enhanced. These findings point to a possible dopaminergic mechanism of action of antidepressants and support speculations concerning the role of dopamine-containing neurons in the pathophysiology of depression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fibiger, H C -- Phillips, A G -- New York, N.Y. -- Science. 1981 Nov 6;214(4521):683-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7197394" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Depression/physiopathology ; Desipramine/*administration & dosage ; Dopamine/*physiology ; Humans ; Limbic System/*physiology ; Male ; Rats ; Rats, Inbred Strains ; Self Stimulation/*drug effects ; Time Factors
    Print ISSN: 0036-8075
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  • 9
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    Malignant potential of murine stromal cells after transplantation of human tumors into nude mice (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-04-03
    Description: Human malignant cancer tumors grafted into nude mice produce tumors containing both human cancer cells and the host's stromal cells. After short-term propagation of these tumors in vitro, the murine mesenchymal cells appear transformed and are tumorigenic in nude mice. However, established human cancer cell lines fail to similarly after adjacent murine stromal cells when used to produce tumors in nude mice. These experiments suggest that cancer cells may recruit normal cells to become malignant, qualifying the view of the clonal (unicellular) origin of cancer.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Goldenberg, D M -- Pavia, R A -- 1R01 CA17198/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1981 Apr 3;212(4490):65-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7209521" target="_blank"〉PubMed〈/a〉
    Keywords: Adenocarcinoma/pathology ; Animals ; Cell Line ; Cells, Cultured ; Colonic Neoplasms/pathology ; Fibrosarcoma/*etiology ; Humans ; Karyotyping ; Mice ; Mice, Inbred BALB C ; Mice, Nude ; Middle Aged ; Neoplasm Transplantation ; Neoplasms, Experimental/*etiology ; Transplantation, Heterologous
    Print ISSN: 0036-8075
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  • 10
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    Merkel cell receptors: structure and transducer function (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-10-09
    Description: An electron microscopic and electrophysiological investigation was made of Merkel cell-neurite complexes in the sinus hair follicles of the cat. These mechanoreceptors respond with very precise phase locking to heavy-frequency vibratory stimuli as well as to static hair displacements. The mechanoelectric transduction process is faster than that known for any other somatic mechanoreceptor. These data show that the nerve endings themselves and not the Merkel cells are the mechanoelectric transducer elements in these receptors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gottschaldt, K M -- Vahle-Hinz, C -- New York, N.Y. -- Science. 1981 Oct 9;214(4517):183-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7280690" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Animals ; Cats ; Cytoplasmic Granules/ultrastructure ; Evoked Potentials ; Mechanoreceptors/*cytology/physiology ; Microscopy, Electron ; Skin/*innervation/ultrastructure ; Time Factors
    Print ISSN: 0036-8075
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  • 11
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    Voltage clamp studies in macrophages from mouse spleen cultures (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-10-23
    Description: Voltage clamp studies of macrophages from cultures of mouse spleen macrophages produced N-shaped steady-state current-voltage curves containing a region of negative slope resistance. Some macrophages exhibit two stable states of membrane potential, having current-voltage relationships that cross the voltage axis at three points. Outward currents that turn on at voltages of +15 millivolts or greater were noted in several cells. The addition of barium chloride to the bathing medium abolished the negative slope resistance and reduced the inward currents in response to hyperpolarizing voltage steps. These data provide direct evidence that macrophages exhibit at least tow different voltage-dependent conductances and demonstrate that voltage clamp techniques can be useful in studying the membrane properties of leukocytes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gallin, E K -- New York, N.Y. -- Science. 1981 Oct 23;214(4519):458-60.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7291986" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Barium/pharmacology ; Cell Membrane/physiology ; Cells, Cultured ; Electric Conductivity ; Macrophages/*physiology ; Membrane Potentials ; Mice ; Spleen/cytology
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  • 12
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    Calcium-dependent prolonged effects on melanophores of [4-norleucine, 7-D-phenylalanine]-alpha-melanotropin (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-08-28
    Description: A single injection of the melanotropin analog [4-norleucine, 7-D-phenylalanine]-alpha-melanotropin into frogs (Rana pipiens) caused near maximum darkening of the skins of the frogs for at least 6 weeks. Injections of the natural hormone alpha-melanotropin or of the analog [Nle4]-alpha-melanotropin also caused darkening, but this effect lasted only a few days. Morphological examination of the skins of frogs injected with [Nle4, D-Phe7]-alpha-melanotropin revealed that both dermal and epidermal melanophores were dispersed during the entire 6-week period. In vitro [Nle4, D-Phe7]-alpha-melanotropin also causes prolonged darkening of the skin of the lizard Anolis carolinensis. In the absence of the melanotropin, skins previously darkened with the analog could be lightened by removal of calcium from the incubation medium but could then be redarkened by adding calcium. The cycle could be repeated indefinitely without addition of melanotropin. These results demonstrate the role of calcium in receptor signal transduction and the prolonged biological effects of [Nle4, D-Phe7]-alpha-melanotropin long after its removal from the assay medium.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hadley, M E -- Anderson, B -- Heward, C B -- Sawyer, T K -- Hruby, V J -- AM-17420/AM/NIADDK NIH HHS/ -- CA-20547/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1981 Aug 28;213(4511):1025-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6973820" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Calcium/*pharmacology ; Lizards ; Melanocyte-Stimulating Hormones/*analogs & derivatives/pharmacology ; Melanophores/*drug effects/ultrastructure ; Rana pipiens ; Skin/ultrastructure ; Skin Pigmentation/*drug effects ; Time Factors ; *alpha-MSH/*analogs & derivatives
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  • 13
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    Retroactive interference in discrimination learning (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-12-11
    Description: In stage 1 of this experiment pigeons were trained to discriminate between two levels of noise or two colors by pecking on one of two disks. In stage 2 the discriminative stimuli were not presented, but pecking on the disks was rewarded on a random schedule. The second procedure caused the pigeons to forget the discrimination they had learned.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Heinemann, E G -- Sage-Day, J -- Brenner, N -- MH 18246/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1981 Dec 11;214(4526):1254-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7302595" target="_blank"〉PubMed〈/a〉
    Keywords: Acoustic Stimulation ; Animals ; Columbidae ; *Discrimination (Psychology) ; Photic Stimulation ; Time Factors
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  • 14
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    Divalent cation ionophores stimulate resorption and inhibit DNA synthesis in cultured fetal rat bone (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-06-05
    Description: Two divalent cation ionophores, A23187 and Ionomycin, which are selective for calcium, stimulated the resorption of fetal rat long bones in organ culture at 0.1 to 1 micromolar but not at higher concentrations. Both agents inhibited DNA synthesis at concentrations that stimulated resorption. These results might explain the differences in ionophore effects on bone previously reported, and they imply that cell replication is not required for osteoclast formation in fetal rat long bone cultures.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lorenzo, J A -- Raisz, L G -- AM 07290/AM/NIADDK NIH HHS/ -- AM 18063/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1981 Jun 5;212(4499):1157-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6785885" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anti-Bacterial Agents/*pharmacology ; Bone Resorption/*drug effects ; Bone and Bones/drug effects/*metabolism ; Calcimycin/*pharmacology ; Calcium/metabolism ; Calcium Radioisotopes ; Cells, Cultured ; DNA/*biosynthesis ; DNA Replication/*drug effects ; Ethers/pharmacology ; Fetus ; Ionomycin ; Ionophores/pharmacology ; Kinetics ; Mice ; Parathyroid Hormone/pharmacology
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  • 15
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    Sexual differentiation of the central nervous system (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-03-20
    Description: Sexual differentiation of reproductive and behavior patterns is largely effected by hormones produced by the gonads. In many higher vertebrates, an integral part of this process is the induction of permanent and essentially irreversible sex differences in central nervous function, in response to gonadal hormones secreted early in development.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉MacLusky, N J -- Naftolin, F -- New York, N.Y. -- Science. 1981 Mar 20;211(4488):1294-302.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6163211" target="_blank"〉PubMed〈/a〉
    Keywords: Androgens/metabolism/physiology ; Animals ; Birds/physiology ; Brain/metabolism ; Central Nervous System/*embryology/physiology ; Estrogens/physiology ; Female ; Humans ; Male ; Mammals/physiology ; Morphogenesis ; Ovary/secretion ; Receptors, Cell Surface/metabolism ; Receptors, Steroid/metabolism ; Sex Characteristics ; Sex Determination Analysis ; *Sex Differentiation ; Testis/secretion ; Time Factors ; alpha-Fetoproteins/physiology
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  • 16
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    The AF64a-treated mouse: possible model for central cholinergic hypofunction (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-07-31
    Description: A loss in the number of functional, sodium ion-dependent, high-affinity choline transport sites was observed in the cortex and hippocampus of mice given an intracerebroventricular injection of 65 nanomoles of AF64A (ethylcholine mustard aziridinium ion) 3 days earlier. Such an effect was not observed in the striatum. This effect of AF64A represents a long-term neurochemical deficit at cholinergic nerve terminals in some brain regions which can lead to a persistent deficiency in central cholinergic transmission. The AF64A-treated animal may thus be a model for certain psychiatric or neurological disorders that appear to involve central cholinergic hypofunction.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mantione, C R -- Fisher, A -- Hanin, I -- MH 26320/MH/NIMH NIH HHS/ -- MH/AG 34893/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1981 Jul 31;213(4507):579-80.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6894649" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Aziridines/*pharmacology ; Azirines/*pharmacology ; Biological Transport/drug effects ; Brain/drug effects/*metabolism ; Cerebral Cortex/metabolism ; Choline/*analogs & derivatives/*metabolism/pharmacology ; Corpus Striatum/metabolism ; Hippocampus/metabolism ; Kinetics ; Mice ; Sodium/pharmacology ; Synaptosomes/drug effects/*metabolism
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 17
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    Growth inhibition by adenosine 3',5-monophosphate derivatives does not require 3',5' phosphodiester linkage (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-09-04
    Description: Analogs of adenosine 3',5'-monophosphate (cyclic AMP) inhibit the growth of cultured cell lines. The effects of 8-bromo- and N6-butyryl-substituted analogs of cyclic and noncyclic AMP on six cell lines were examined and were equally inhibitory. Variant cell lines with altered cyclic AMP-dependent protein kinase were more resistant to both cyclic and noncyclic nucleotides. We conclude that growth inhibition by analogs of cyclic AMP (i) does not require a 3',5' phosphodiester bond and (ii) may be mediated by a pathway involving endogenous cyclic AMP.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Martin, T F -- Kowalchyk, J A -- AM 25861/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1981 Sep 4;213(4512):1120-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6267695" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Division/*drug effects ; Cell Line ; Cricetinae ; Cyclic AMP/*pharmacology ; DNA/biosynthesis ; Growth Inhibitors/*pharmacology ; Mice ; Phosphodiesterase Inhibitors/pharmacology ; Structure-Activity Relationship
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 18
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    More progress on gene transfer (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-08-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marx, J L -- New York, N.Y. -- Science. 1981 Aug 28;213(4511):996-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6943678" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *DNA, Recombinant ; *Genetic Engineering ; Mice ; Recombination, Genetic
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  • 19
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    Electroconvulsive shock increases tyrosine hydroxylase activity in the brain and adrenal gland of the rat (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-11-06
    Description: A single application of electroconvulsive shock produced a rapid but short-lasting increase in tyrosine hydroxylase activity above control values in the rat adrenal medulla and striatum. After repeated electroconvulsive shock treatment (once per day for 7 days), tyrosine hydroxylase activity increased significantly in the locus ceruleus, nucleus of the tractus solitarius, hippocampus, cerebellum, and frontal cortex and remained elevated for 4 to 8 days. Adrenal tyrosine hydroxylase activity increased 1 day after the termination of repeated electroconvulsive shock treatments and remained elevated for at least 24 days, possibly reflecting the establishment of a new and higher steady-state level of catecholamine biosynthesis in the adrenal. These findings suggest that the persistent changes in tyrosine hydroxylase activity produced by repeated electroconvulsive shock may be a factor contributing to the long-lasting antidepressant effects of this treatment.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Masserano, J M -- Takimoto, G S -- Weiner, N -- NS 07927/NS/NINDS NIH HHS/ -- NS 09199/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1981 Nov 6;214(4521):662-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6117127" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenal Glands/*enzymology ; Animals ; Brain/*enzymology ; Corpus Striatum/enzymology ; *Electroshock ; Enzyme Induction ; Locus Coeruleus/enzymology ; Male ; Rats ; Rats, Inbred Strains ; Time Factors ; Tyrosine 3-Monooxygenase/*metabolism
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  • 20
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    Viral epitopes and monoclonal antibodies: isolation of blocking antibodies that inhibit virus neutralization (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-07-24
    Description: The inability of pathogenic animal viruses to be completely neutralized by antibodies can lead to chronic viral infections in which infectious virus persists even in the presence of excess neutralizing antibody. A mechanism that results in this nonneutralized fraction of virus was defined by the topographical relationships of viral epitopes identified with monoclonal antibodies wherein monoclonal antibodies bind to virus and sterically block the binding of neutralizing antibodies.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Massey, R J -- Schochetman, G -- N01-CO-75380/CO/NCI NIH HHS/ -- New York, N.Y. -- Science. 1981 Jul 24;213(4506):447-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6264601" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Antibodies ; Antibodies, Monoclonal ; *Antigen-Antibody Complex ; Antigens, Viral ; Clone Cells ; Kirsten murine sarcoma virus/*immunology ; Mammary Tumor Virus, Mouse/*immunology ; Mice ; Sarcoma Viruses, Murine/*immunology
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  • 21
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    Carcinogenicity in mice of mutagenic compounds from a tryptophan pyrolyzate (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-07-17
    Description: The compounds 3-amino-1,4-dimethyl-5H-pyrido[4,3-b]indole and 3-amino-1-methyl-5H-pyrido[4,3-b]indole, which are potent mutagens in a tryptophan pyrolyzate, ar hepatic carcinogens when given orally to mice at concentrations of 200 parts per million in a pellet diet. Female mice showed higher susceptibilities to both compounds than male mice.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Matsukura, N -- Kawachi, T -- Morino, K -- Ohgaki, H -- Sugimura, T -- Takayama, S -- New York, N.Y. -- Science. 1981 Jul 17;213(4505):346-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7244619" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Carbolines/*pharmacology ; *Carcinogens ; Drug Evaluation, Preclinical ; Female ; Indoles/*pharmacology ; Male ; Mice ; Mice, Inbred Strains ; Mutagens/*pharmacology ; Neoplasms, Experimental/chemically induced ; Sex Factors
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 22
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    Copper deficiency suppresses the immune response of mice (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-07-31
    Description: Mice fed a purified diet low in copper display anemia, hypoceruloplasminemia, depressed concentrations of liver copper, and elevated concentrations of liver iron. An impaired humoral-mediated immune response (decreased numbers of antibody-producing cells) is observed in mice with severe as well as marginal copper deficiency. The magnitude of this impairment is highly correlated with the degree of functional copper deficiency (hypoceruloplasminemia).〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Prohaska, J R -- Lukasewycz, O A -- New York, N.Y. -- Science. 1981 Jul 31;213(4507):559-61.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7244654" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibody Formation/*drug effects ; Body Weight/drug effects ; Ceruloplasmin/metabolism ; Copper/*deficiency/pharmacology ; Female ; Hemoglobins/metabolism ; Iron/metabolism ; Liver/metabolism ; Male ; Mice ; Mice, Inbred Strains ; Organ Size/drug effects ; Sex Factors ; Spleen/drug effects
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 23
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    Diameter of the cell-to-cell junctional membrane channels as probed with neutral molecules (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-07-31
    Description: The cell-to-cell channels in the junctions of an insect salivary gland and of insect and mammalian cells in culture were probed with fluorescent molecules-neutral linear oligosaccharides, neutral branched glycopeptides, and charged linear peptides. From the molecular dimensions of the largest permeants and smallest impermeants the permeation-limiting channel diameter was obtained: 16 to 20 angstroms for the mammalian cells and 20 to 30 angstroms for the insect cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schwarzmann, G -- Wiegandt, H -- Rose, B -- Zimmerman, A -- Ben-Haim, D -- Loewenstein, W R -- CA 14464/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1981 Jul 31;213(4507):551-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7244653" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Chironomidae ; Fluorescent Dyes ; Glycopeptides/*metabolism ; Intercellular Junctions/*ultrastructure ; Mice ; Mice, Inbred BALB C ; Models, Molecular ; Oligosaccharides/*metabolism ; Protein Conformation ; Salivary Glands/*ultrastructure ; Species Specificity
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  • 24
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    Myelination of central nervous system axons in tissue culture by transplanted oligodendrocytes (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-06-19
    Description: Unmyelinated mouse cerebellar cerebellar cultures in which oligodendrocyte differentiation had been suppressed by exposure to cytosine arabinoside developed axonal myelin after superimposition of kainic acid-treated cerebellar explants devoid of myelin-receptive axons. The latter explants contained differentiated oligodendrocytes. The operation of a diffusible myelin-stimulating factor was ruled out by the failure of myelination in cytosine arabinoside-exposed explants not in direct contact with oligodendrocyte-containing transplants.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Seil, F -- Blank, N K -- New York, N.Y. -- Science. 1981 Jun 19;212(4501):1407-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7233230" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Newborn ; Axons/drug effects/*physiology ; Cerebellum/drug effects/*physiology ; Collagen ; Cytarabine/pharmacology ; Kainic Acid/pharmacology ; Mice ; Myelin Sheath/drug effects/*physiology ; Neuroglia/*transplantation ; Oligodendroglia/*transplantation ; Organ Culture Techniques
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  • 25
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    Studies in histocompatibility (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-07-10
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Snell, G D -- New York, N.Y. -- Science. 1981 Jul 10;213(4504):172-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7017931" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Animals ; Antigens, Neoplasm/genetics ; Antigens, Viral/genetics ; Antigens, Viral, Tumor ; Female ; Genetic Linkage ; Genotype ; H-2 Antigens/genetics ; Heterozygote ; *Major Histocompatibility Complex ; Male ; Mice ; Mice, Inbred Strains ; Neoplasms, Experimental/genetics/*immunology ; Pedigree ; Rats ; Species Specificity
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  • 26
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    Immunization of Baboons with Schistosoma mansoni Cercariae attenuated by gamma irradiation (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-06-26
    Description: Studies on the efficacy of a vaccine against schistosomiasis in young baboons (Papio anubis) disclosed that immunization with Schistosoma mansoni cercariae attenuated by gamma irradiation induced significant protection against subsequent infection with normal, viable S. mansoni cercariae. Such immunization resulted in reduced worm burdens (70 percent) and egg excretion rates (82 percent). These results support immunization as a potential method for schistosomiasis control.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stek M, F r -- Minard, P -- Dean, D A -- Hall, J E -- New York, N.Y. -- Science. 1981 Jun 26;212(4502):1518-20.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7233238" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Female ; *Immunization ; Mice ; Mice, Inbred Strains ; Papio ; Schistosoma mansoni/immunology/*radiation effects ; Schistosomiasis/prevention & control
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  • 27
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    Axonal transport: each major rate component reflects the movement of distinct macromolecular complexes (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-10-09
    Description: The proteins of the three major rate components of axonal transport in guinea pig retinal ganglion cells were analyzed by one- and two-dimensional gel electrophoresis. Each rate component consisted of a different set of proteins that remained associated with each other during transport. This suggests that each rate component represents a distinct macromolecular complex and that these complexes may be definable organelles such as microtubules, microfilaments, and smooth endoplasmic reticulum. Thus, the transport of radiolabeled proteins in the axon reflects the movement of complete subcellular rather than the movement of individual proteins.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tytell, M -- Black, M M -- Garner, J A -- Lasek, R J -- NS 05892-02/NS/NINDS NIH HHS/ -- NS 13658-03/NS/NINDS NIH HHS/ -- NS 14900-02/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1981 Oct 9;214(4517):179-81.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6169148" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Axonal Transport ; Axons/*metabolism ; Cytoskeleton/metabolism ; Electrophoresis, Polyacrylamide Gel ; Endoplasmic Reticulum/metabolism ; Guinea Pigs ; Hypoglossal Nerve/metabolism ; Microtubules/metabolism ; Nerve Tissue Proteins/*metabolism ; Retina/metabolism ; Time Factors
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  • 28
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    Mouse pox threat (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-01-30
    Description: A News and Comment Briefing ("OSHA backs away from strict lab rules," 28 Nov. 1980, p. 992) incorrectly quoted a National Research Council report on safe handling of laboratory chemicals as saying, "For most laboratory environments, ... regular monitoring of the airborne concentrations of a variety of different toxic materials is both unjustified and unjust." The report actually said it was "unjustified and impractical."〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wallace, G D -- New York, N.Y. -- Science. 1981 Jan 30;211(4481):438.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6256854" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Laboratory/*microbiology ; Disease Outbreaks/*veterinary ; Ectromelia virus ; Ectromelia, Infectious/*epidemiology ; Mice ; Mice, Inbred Strains ; Poxviridae Infections/*epidemiology ; Rodent Diseases/epidemiology ; United States
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  • 29
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    Intrinsic birefringence signal preceding the onset of contraction in heart muscle (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-08-07
    Description: An intrinsic birefringence signal with two components occurring before sarcomere shortening was measured in mammalian cardiac muscle. The second component was sensitive to the inotropic state of the muscle as affected by external calcium concentration and epinephrine but not by changes of resting length. The second component was absent in frog heart. These results suggest that the second component of the birefringence signal reflects the activity of the sarcoplasmic reticulum related to excitation-contraction coupling processes occurring prior to onset of contraction in mammalian cardiac muscle.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Weiss, R -- Morad, M -- New York, N.Y. -- Science. 1981 Aug 7;213(4508):663-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7256266" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Animals ; Birefringence ; Calcium/*physiology ; Cats ; Guinea Pigs ; Heart/*physiology ; Intracellular Membranes/physiology ; *Myocardial Contraction ; Rats ; Sarcoplasmic Reticulum/*physiology ; Time Factors
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  • 30
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    The hormonal control of sexual development (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-03-20
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wilson, J D -- George, F W -- Griffin, J E -- AM03892/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1981 Mar 20;211(4488):1278-84.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7010602" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anti-Mullerian Hormone ; Estradiol/metabolism/*physiology ; Female ; *Glycoproteins ; Gonadotropins/physiology ; *Growth Inhibitors ; Humans ; Male ; Morphogenesis ; Mullerian Ducts ; Ovary/embryology ; Rabbits ; Receptors, Androgen/metabolism ; *Sex Differentiation ; Testicular Hormones/*physiology ; Testis/embryology/secretion ; Testosterone/metabolism/*physiology ; Time Factors ; Urogenital System/embryology ; Wolffian Ducts
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  • 31
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    Intestinal M cells: a pathway for entry of reovirus into the host (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-04-24
    Description: Thirty minutes after inoculation of reovirus type 1 into the intestinal lumen of the mouse, viruses were found adhering to the surface of intestinal M cells but not other epithelial cells. Within 1 hour, viruses were seen in the M cell cytoplasm and were associated with mononuclear cells in the intercellular space adjacent to the M cell. These findings suggest that M cells are the site where reovirus penetrates the intestinal epithelium.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wolf, J L -- Rubin, D H -- Finberg, R -- Kauffman, R S -- Sharpe, A H -- Trier, J S -- Fields, B N -- AI 13178/AI/NIAID NIH HHS/ -- AM 07121/AM/NIADDK NIH HHS/ -- AM 17537/AM/NIADDK NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1981 Apr 24;212(4493):471-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6259737" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Suckling/microbiology ; Endocytosis ; Extracellular Space/microbiology ; Intestinal Mucosa/cytology/*microbiology ; Mice ; Peyer's Patches/microbiology ; Receptors, Virus/metabolism ; Reoviridae/*physiology ; Reoviridae Infections/*pathology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 32
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    Gene for neuraminidase activity on mouse chromosome 17 near h-2: pleiotropic effects on multiple hydrolases (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-04-03
    Description: The low activity of liver neuraminidase that is characteristic of mouse strain SM/J is inherited as a single gene on chromosome 17, near the major histocompatibility complex. This gene, neuraminidase-1 (Neu-1), is represented by the low activity allele Neu-1s in SM/J and the high activity allele Neu-1b in C57BL/6J and most other strains. Previously described variations in the posttranslational processing of acid phosphatase, alpha-mannosidase, arylsulfatase-B, and alpha-glucosidase are attributed to pleiotropic effects of this gene.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Womack, J E -- Yan, D L -- Potier, M -- New York, N.Y. -- Science. 1981 Apr 3;212(4490):63-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7209520" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Animals ; Chromosome Mapping ; Female ; H-2 Antigens/genetics ; Hydrolases/*metabolism ; Liver/enzymology ; Major Histocompatibility Complex ; Male ; Mice ; Mice, Inbred Strains/*genetics/metabolism ; Neuraminidase/*genetics ; Protein Precursors/*metabolism ; Recombination, Genetic ; Sialic Acids/metabolism
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    Metastatic potential is positively correlated with cell surface sialylation of cultured murine tumor cell lines (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-06-26
    Description: The ability of murine tumor cells to metastasize spontaneously from subcutaneous sites is positively correlated with the total sialic acid content of the cells in culture, the degree to which the sialic acid is exposed on the tumor cell surface, and, most strongly, with the degree of sialylation of galactosyl and N-acetylgalactosaminyl residues in cell surface glycoconjugates. These findings suggest that sialic acid on the cell surface may play a role in tumor cell metastasis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yogeeswaran, G -- Salk, P L -- CA19312-01/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1981 Jun 26;212(4502):1514-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7233237" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Cell Membrane/*physiology ; Cell Transformation, Neoplastic ; Cell Transformation, Viral ; Mice ; *Neoplasm Metastasis ; Neoplasms, Experimental/*physiopathology ; Sialic Acids/*analysis
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    Therapy of mouse lymphoma with monoclonal antibodies to glycolipid: selection of low antigenic variants in vivo (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-01-30
    Description: Growth of mouse lymphoma L5178Y, which contains large quantitites of the gangliotriosylceramide (GgOs3Cer), in DBA/2 mice was suppressed by passive immunization with monoclonal immunoglobulin G3 antibodies to GgOS3Cer, but not by immunoglobulin M antibodies with or without added complement. Most groups of mice treated with monoclonal immunoglobulin G3 antibodies did not develop tumors, but the tumor that appeared in a treated animal had a much lower amount of the GgOS3Cer than the cells used for inoculation. Thus, passive immunization either prevented growth of the lymphoma or caused selection of a variant with a lower quantity of the antigen GgOS3Cer.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Young, W W Jr -- Hakomori, S I -- CA27746/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1981 Jan 30;211(4481):487-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7455688" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, Neoplasm ; Antigens, Surface ; Clone Cells/immunology ; Glycolipids/*immunology ; Hybrid Cells/immunology ; Immunization, Passive ; Immunoglobulin G/administration & dosage ; Immunoglobulin M/administration & dosage ; Immunotherapy ; Lymphoma/immunology/*therapy ; Mice ; Neoplasms, Experimental/therapy
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    Homeostasis of the antibody response: immunoregulation by NK cells (1983)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1983-11-11
    Description: When injected into mice, the synthetic double-stranded polynucleotide poly(inosinic) X poly(cytidylic) acid induces high natural killer (NK) cell activity within 4 to 12 hours. Induction of NK activity in mice immunized 2 or 3 days previously, or the addition of NK cells to cultures immunized in vitro 2 or 3 days previously, promotes early termination of the ongoing primary immunoglobulin M antibody response. A target for NK cells is a population of accessory cells that has interacted with antigen and is necessary for sustaining the antibody response. The inference is strong that NK cells induced normally by immunization also terminate the usual antibody response in vivo by elimination of antigen-exposed accessory cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Abruzzo, L V -- Rowley, D A -- 5-T32-CA-09267/CA/NCI NIH HHS/ -- R01-10242/PHS HHS/ -- New York, N.Y. -- Science. 1983 Nov 11;222(4624):581-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6685343" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Antibody Formation ; Antibody-Producing Cells/immunology ; Cells, Cultured ; Homeostasis ; Killer Cells, Natural/*immunology/radiation effects ; Lymphocyte Cooperation ; Lymphocytes/*immunology ; Mice ; Poly I-C/immunology ; Spleen/immunology
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    Primary murine bone marrow cultures support continuous growth of infectious human trypanosomes (1983)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1983-04-22
    Description: The human parasite Trypanosoma brucei gambiense grew continuously at 37 degrees C in primary cultures of murine bone marrow. Cultured parasites remained virulent for mice. Rapid parasite growth coincided with the appearance of adherent adipocyte-epitheloid cell aggregates that also promoted hematopoiesis. This culture system should permit studies of host cell control of trypanosome proliferation, pathogenic effects of trypanosomes on blood cell development, and the relative trypanocidal and marrow suppressive activities of drugs.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Balber, A E -- CA 14049/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1983 Apr 22;220(4595):421-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6836284" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Bone Marrow ; Cells, Cultured ; Culture Media ; Humans ; Mice ; Mice, Inbred BALB C ; Trypanosoma brucei brucei/growth & development ; Trypanosoma brucei gambiense/*growth & development ; Trypanosomiasis, African/parasitology
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    Independent pathways for secretion of cholesterol and apolipoprotein E by macrophages (1983)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1983-02-18
    Description: Cholesterol-loaded macrophages secrete cholesterol and apolipoprotein E. The current studies show that this secretion occurs by two independent pathways. In the absence of serum, the cells secrete apolipoprotein E, but not cholesterol. In the presence of monensin (an inhibitor of protein secretion), the cells secrete cholesterol, but little apolipoprotein E. After secretion, apolipoprotein E and cholesterol associate with high-density lipoprotein to form a particle that can deliver cholesterol to the liver by receptor-mediated endocytosis. We conclude that apolipoprotein E does not function to remove cholesterol from macrophages but rather to participate in "reverse cholesterol transport."〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Basu, S K -- Goldstein, J L -- Brown, M S -- HL 20948/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1983 Feb 18;219(4586):871-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6823554" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Apolipoproteins/*secretion ; Cholesterol/*secretion ; Lipoproteins, HDL/metabolism ; Macrophages/*metabolism ; Mice ; Monensin/pharmacology
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    A polypeptide secreted by transformed cells that modulates human plasminogen activator production (1983)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1983-07-08
    Description: A diffusible factor produced and secreted by malignant murine cells was capable of inducing plasminogen activator production by normal diploid human fibroblasts. The factor's ability to induce plasminogen activator was insensitive to treatment with nucleases, but its activity was destroyed by digestion with proteases. It is proposed that such a factor would play a role in malignancy if it would recruit normal cells that were adjacent to transformed cells to produce plasminogen activator which could result in tumor-promoted proteolysis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Davies, R L -- Rifkin, D B -- Tepper, R -- Miller, A -- Kucherlapati, R -- CA-16239/CA/NCI NIH HHS/ -- CA-35171/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1983 Jul 8;221(4606):171-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6682999" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cricetinae ; Fibroblasts/drug effects/metabolism ; Humans ; Hybrid Cells/metabolism ; Melanoma/metabolism ; Mice ; Neoplasms, Experimental/*metabolism/secretion ; Peptides/pharmacology/*secretion ; Plasminogen Activators/*biosynthesis ; Rats
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    Memory retrieval: a time-locked process in infancy (1983)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1983-12-23
    Description: Three-month-old infants learned to activate an overhead crib mobile by operant footkicking and received a visual reminder of the event (a "reactivation treatment") 2 weeks later, after forgetting had occurred. Subsequent manifestation of the association was a monotonic increasing function of time since the reactivation treatment, and performance of infants tested 8 hours after the remainder was related to the time spent sleeping in the interim (r = 0.75). These data demonstrate that normal retrieval is time-dependent. Moreover, individual data suggest that retrieval may be continuous rather than discontinuous.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fagen, J W -- Rovee-Collier, C -- MH 32307/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1983 Dec 23;222(4630):1349-51.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6658456" target="_blank"〉PubMed〈/a〉
    Keywords: Humans ; Infant ; *Memory ; Time Factors
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    Scientist sues over genetically impure mice (1983)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1983-08-12
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fox, J L -- New York, N.Y. -- Science. 1983 Aug 12;221(4611):625-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6603019" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Animals, Laboratory ; Jurisprudence ; Mice ; *Mice, Inbred BALB C ; Rats ; Rats, Inbred Lew ; Rats, Inbred Strains ; Research ; United States ; Wisconsin
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    Adenosine receptors: autoradiographic evidence for their location on axon terminals of excitatory neurons (1983)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1983-05-27
    Description: Adenosine receptors were made visible on light microscopy by autoradiography with tritiated cyclohexyladenosine. In the cerebellum, adenosine receptors were absent in Weaver mice, which lack granule cells, and were displaced in Reeler mice, which have displacements of granule cells. Thus, adenosine receptors appear to be located on the axon terminals of excitatory granule cells in the cerebellum. Removal of one eye of a rat depleted adenosine receptors in the contralateral superior colliculus, suggesting that the receptors occur on axon terminals of excitatory projections from retinal ganglion cells. The presence of adenosine receptors on excitatory axon terminals may explain synaptic inhibition by adenosine and the behavioral effects of xanthines.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Goodman, R R -- Kuhar, M J -- Hester, L -- Snyder, S H -- DA-00266/DA/NIDA NIH HHS/ -- MH-18501/MH/NIMH NIH HHS/ -- NS-16375/NS/NINDS NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1983 May 27;220(4600):967-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6302841" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine/*physiology ; Animals ; Autoradiography ; Axons/*physiology ; Cerebellum/physiology ; Corpus Striatum/physiology ; Hippocampus/physiology ; Mice ; Mice, Neurologic Mutants ; Rats ; Rats, Inbred Strains ; Receptors, Cell Surface/*physiology ; Receptors, Purinergic ; Retinal Ganglion Cells/physiology ; Synaptic Membranes/physiology ; Thalamus/physiology
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    High efficiency DNA-mediated transformation of primate cells (1983)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1983-08-05
    Description: Tissue culture cells from several mammalian species, including three primate lines, were transfected with recombinant vectors carrying Escherichia coli xanthine-guanine phosphoribosyltransferase or Tn5 aminoglycoside phosphotransferase dominant selectable markers. Human HeLa and SV40-transformed xeroderma pigmentosum cells exhibited stable transformation frequencies of at least 10(-3) (0.1 percent). CV-1, an African green monkey kidney cell line, could be stably transformed with the exceptionally high frequency of 6 X 10(-2) (6 percent).〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gorman, C -- Padmanabhan, R -- Howard, B H -- New York, N.Y. -- Science. 1983 Aug 5;221(4610):551-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6306768" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Avian Sarcoma Viruses/genetics ; Cell Line ; Cercopithecus aethiops ; Cricetinae ; Cricetulus ; DNA, Recombinant/*metabolism ; Genetic Vectors ; HeLa Cells/metabolism ; Humans ; Mice ; Plasmids ; *Transfection
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    Somatic mutations of immunoglobulin variable genes are restricted to the rearranged V gene (1983)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1983-06-10
    Description: An important question concerning the mechanism of somatic mutation of immunoglobulin variable (V) genes is whether it involves all of the numerous V genes in a differentiated B cell, independent of location, or if it is restricted to a particular chromosomal site. Comparison of the sequence of two alleles of a given V gene shows that the mutations are limited to the rearranged V gene, while the same V gene on the other chromosome has not undergone mutation. This indicates that a V gene sequence alone is not sufficient for somatic mutation to take place. The mutation is therefore restricted to the rearranged V gene and consequently does not occur before rearrangement.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gorski, J -- Rollini, P -- Mach, B -- New York, N.Y. -- Science. 1983 Jun 10;220(4602):1179-81.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6857243" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Binding Sites, Antibody/*genetics ; Chromosomes/physiology ; DNA/genetics ; *Genes ; Immunoglobulin Constant Regions/genetics ; Immunoglobulin Variable Region/*genetics ; Immunoglobulins/genetics ; Lymphocytes/metabolism ; Mice ; *Mutation
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    Expression of a cellular oncogene during liver regeneration (1983)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1983-02-04
    Description: The number of transcripts of the cellular oncogene ras, which is homologous to the transforming gene of Harvey sarcoma virus, increases during liver regeneration in rats. The increase in these transcripts in liver polysomal polyadenylated RNA occurs at the time of activation of DNA synthesis during the regenerative process induced by partial hepatectomy or carbon tetrachloride injury. The number of ras transcripts returns to basal levels within 72 hours. These observations show that transcription of a cellular oncogene increases in a regulated way in a nonneoplastic growth process.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Goyette, M -- Petropoulos, C J -- Shank, P R -- Fausto, N -- New York, N.Y. -- Science. 1983 Feb 4;219(4584):510-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6297003" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Carbon Tetrachloride Poisoning ; DNA/biosynthesis ; Hepatectomy ; *Liver Regeneration ; Nucleic Acid Hybridization ; *Oncogenes ; RNA, Messenger/biosynthesis ; Rats ; Sarcoma Viruses, Murine/genetics ; Time Factors ; *Transcription, Genetic
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    Hand preference across time is related to intelligence in young girls, not boys (1983)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1983-09-09
    Description: Consistency of hand preference was examined in a longitudinal study of children between 18 and 42 months of age. Results showed a sex-specific relationship between hand consistency and intellectual development. Across a variety of intellectual abilities at all ages, females with consistency of handedness were precocious compared to females without such consistency. This relationship did not hold for males.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gottfried, A W -- Bathurst, K -- New York, N.Y. -- Science. 1983 Sep 9;221(4615):1074-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6879205" target="_blank"〉PubMed〈/a〉
    Keywords: Child, Preschool ; Female ; *Functional Laterality ; Humans ; Infant ; *Intelligence ; Intelligence Tests ; Male ; Sex Factors ; Time Factors
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    Isolation of lamellar bodies from neonatal mouse epidermis by selective sequential filtration (1983)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1983-09-02
    Description: Isolation of epidermal lamellar bodies has presented a challenge because pressures required to homogenize keratinocytes can destroy these organelles and because the lamellar body readily releases its contents during prolonged isolation procedures. In an attempt to isolate lamellar bodies, sheets of intact stratum corneum and stratum granulosum were obtained from neonatal mice with highly purified staphylococcal epidermolytic toxin, disrupted, and passed through a series of filters. The final filtrate was rich in intact lamellar bodies and contained variable amounts of ribosomes and other vesicular structures. Availability of a highly purified lamellar body preparation from postnatal epidermis should help to clarify the role of this organelle in epidermal function. The technique of selective, sequential filtration represents a new approach to cell fractionation that may have wide applications in cell biology and biochemistry.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Grayson, S -- Johnson-Winegar, A D -- Elias, P M -- AM 19098/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1983 Sep 2;221(4614):962-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6879194" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Fractionation/methods ; Epidermis/*ultrastructure ; Filtration ; Mice ; Microscopy, Electron
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    Virus-induced autoimmunity: monoclonal antibodies that react with endocrine tissues (1983)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1983-04-15
    Description: Mice infected with reovirus type 1 develop an autoimmune polyendocrine disease. Spleen cells from these mice were fused with myeloma cells and the culture fluids were screened by indirect immunofluorescence for autoantibodies reactive with normal mouse tissues. A large panel of cloned, stable antibody-producing hybridomas has been obtained. Fourteen of the hybridomas make autoantibodies that react with cells in the islets of Langerhans, 24 with cells in the anterior pituitary, 11 with cells in gastric mucosa, and 5 with nuclei. Except for the antibodies to nuclei, the monoclonal autoantibodies are organ-specific. Some, however, show broad cross-species reactivity, recognizing similar antigenic determinants in mouse, rat, pig, and human organs, whereas other recognize determinants only in rodent tissues. Several of the antigens recognized by these monoclonal autoantibodies have been identified as hormones (for example, glucagon, growth hormone, and insulin).〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Haspel, M V -- Onodera, T -- Prabhakar, B S -- Horita, M -- Suzuki, H -- Notkins, A L -- New York, N.Y. -- Science. 1983 Apr 15;220(4594):304-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6301002" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Monoclonal/*immunology ; Autoantibodies/immunology ; Autoimmune Diseases/immunology/*microbiology ; Endocrine Glands/*immunology ; Enzyme-Linked Immunosorbent Assay ; Growth Hormone/immunology ; Humans ; Hybridomas/immunology ; Mice ; Pituitary Gland, Anterior/immunology ; Rats ; Reoviridae Infections/*immunology
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    Contiguity to males in utero affects avoidance responding in adult female mice (1983)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1983-04-22
    Description: Female mice that had been situated in utero between two female fetuses displayed higher levels of active avoidance responding in adult life than females that had been located between two male fetuses and males for whom uterine position was without effect. Uterine position, therefore, influences acquired as well as species-typical behaviors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hauser, H -- Gandelman, R -- New York, N.Y. -- Science. 1983 Apr 22;220(4595):437-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6836288" target="_blank"〉PubMed〈/a〉
    Keywords: Androgens/physiology ; Animals ; Avoidance Learning/*physiology ; Female ; Fetus/*physiology ; Male ; Mice ; Pregnancy ; Rats ; Sex Factors ; Uterus
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    Simple repeat array in Epstein-Barr virus DNA encodes part of the Epstein-Barr nuclear antigen (1983)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1983-06-24
    Description: The size of the Epstein-Barr virus (EBV) nuclear antigen (EBNA) in cells infected with different EBV isolates varies directly with the size of the EBV triplet repeat array, IR3. The isolate with the largest IR3 fragment has approximately 170 more codons than the isolates with the smallest IR3 fragment; it encodes an EBNA which is approximately 17,000 daltons larger than the smallest EBNA. The EBV IR3 encodes part of a 2-kilobase exon of a latently infected cell messenger RNA which must be translated into a repetitive amino acid domain of EBNA.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hennessy, K -- Heller, M -- van Santen, V -- Kieff, E -- CA 17281/CA/NCI NIH HHS/ -- CA 19264/CA/NCI NIH HHS/ -- GM 07183/GM/NIGMS NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1983 Jun 24;220(4604):1396-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6304878" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, Viral/*genetics ; Base Sequence ; Cell Nucleus/immunology ; DNA, Viral/*genetics ; Epstein-Barr Virus Nuclear Antigens ; Herpesvirus 4, Human/*genetics/immunology ; Humans ; Mice ; RNA, Viral/genetics
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    Radioactive labeling of antibody: a simple and efficient method (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-05-06
    Description: A simple and efficient method of covalently coupling the strong chelator diethylenetriaminepentaacetic acid to proteins was developed for radiolabeling immunoglobulin G antibodies. After being coupled and labeled with indium-111, a monoclonal antibody to carcinoembryonic antigen retained its ability to bind to its antigen in vitro and in vivo. In nude mice with a human colorectal xenograft, 41 percent of the injected radioactivity became localized in each gram of xenograft at 24 hours compared with 9 percent for control antibody and 19 percent for radioiodinated antibody to carcinoembryonic antigen.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hnatowich, D J -- Layne, W W -- Childs, R L -- Lanteigne, D -- Davis, M A -- Griffin, T W -- Doherty, P W -- 1 RO1 CA26968/CA/NCI NIH HHS/ -- 1 RO1 GM26780/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1983 May 6;220(4597):613-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6836304" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Antibodies ; Antibodies, Monoclonal/immunology ; Carcinoembryonic Antigen/immunology ; Chromatography, High Pressure Liquid ; Humans ; Immunoglobulin G/immunology ; Isotope Labeling/*methods ; Mice ; Mice, Inbred BALB C ; Mice, Nude ; Neoplasm Transplantation ; Pentetic Acid
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Synthesizing the opioid peptides (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-04-22
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marx, J L -- New York, N.Y. -- Science. 1983 Apr 22;220(4595):395-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6836282" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Aplysia/physiology ; Endorphins/*biosynthesis/genetics ; Humans ; Mice ; Nervous System Physiological Phenomena ; Pituitary Hormones, Anterior/biosynthesis/genetics ; Pro-Opiomelanocortin ; Protein Precursors/biosynthesis/genetics ; RNA, Messenger/metabolism ; Rats
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    Suppressing autoimmunity in mice (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-08-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marx, J L -- New York, N.Y. -- Science. 1983 Aug 26;221(4613):843-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6576470" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Monoclonal ; Autoimmune Diseases/*therapy ; Histocompatibility Antigens Class II/immunology ; Immune Tolerance ; Isoantibodies ; Mice ; Myasthenia Gravis/therapy
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    Selective modification of glutathione metabolism (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-04-29
    Description: Glutathione, a tripeptide thiol found in virtually all cells, functions in metabolism, transport, and cellular protection. It participates in the reduction of disulfides and other molecules, and conjugates with compounds of exogenous and endogenous origin. It protects cells against the destructive effects of reactive oxygen intermediates and free radicals. Modifications of glutathione metabolism may be achieved by administration of selective enzyme inhibitors, and also by giving compounds that increase glutathione synthesis. Such effects are useful in chemotherapy and radiation therapy and in protecting cells against the toxic effects of drugs, other foreign compounds, and oxygen.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Meister, A -- New York, N.Y. -- Science. 1983 Apr 29;220(4596):472-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6836290" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Transport ; Free Radicals ; Glutathione/analogs & derivatives/biosynthesis/*metabolism/physiology ; Glutathione Disulfide ; Glutathione Synthase/deficiency/metabolism ; Humans ; Leukemia L1210/metabolism ; Mice ; Oxidation-Reduction ; Peroxides/metabolism ; Pyroglutamate Hydrolase/metabolism ; Trypanosoma brucei brucei/metabolism
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    Drug-induced alterations of cytokeratin organization in cultured epithelial cells (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-02-04
    Description: The distribution of keratin intermediate filaments, previously considered static in organization and imperturbable by conventional drugs used to alter the structure and organization of the cytoskeleton, can be altered significantly by treatment with colchicine and cytochalasin D. The loss of microfilaments and microtubules converts the keratin cytoskeleton from a branching, even distribution to a series of starlike structures whose filaments are maintained by multiple membrane attachment sites. These findings provide a means for manipulating cytokeratin organization to investigate the role of keratins in cytoskeletal structure and function.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Knapp, L W -- O'Guin, W M -- Sawyer, R H -- New York, N.Y. -- Science. 1983 Feb 4;219(4584):501-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6186022" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; Colchicine/*pharmacology ; Cytochalasin D ; Cytochalasins/*pharmacology ; Cytoskeleton/*drug effects ; Epithelium ; *Keratins ; Mice ; Microtubules/drug effects
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    Passive transfer of diabetes in the BB/W rat (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-05-13
    Description: Severe diabetes with insulitis was produced in young diabetes-prone BB/W rats by passive transfer of concanavalin A-treated spleen cells from BB/W animals with acute diabetes. Spleen cells alone or in combination with lymph node cells were active in transferring disease.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Koevary, S -- Rossini, A -- Stoller, W -- Chick, W -- Williams, R M -- AM-25306/AM/NIADDK NIH HHS/ -- AM-30846/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1983 May 13;220(4598):727-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6836309" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Concanavalin A/pharmacology ; Diabetes Mellitus/etiology/*immunology ; Hyperglycemia/etiology/immunology ; Immunity, Cellular ; Mice ; Mice, Nude ; Rats ; Spleen/cytology/drug effects/transplantation ; Transplantation, Heterologous ; Transplantation, Homologous
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    Genetically obese mice: resistance to metastasis of B16 melanoma and enhanced T-lymphocyte mitogenic responses (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-06-10
    Description: The metastasis of B16 melanoma cells differed significantly in obese (ob/ob) and lean (+/?) female mice of strain C57BL/6J. When the mice were inoculated subcutaneously with melanoma cells at 10 to 11 months of age, the primary tumor grew more slowly in obese than in lean littermates and the frequency of lung metastasis was greatly reduced. When the mice were injected with the cells at 4 to 7 months, the primary tumor grew at the same rate in obese and lean mice, but the obese mice again showed a significantly reduced frequency of lung metastasis. That this effect was related to an enhanced immunocompetence in obese mice was supported by the finding that splenic lymphocytes of ob/ob mice showed three times the proliferative response to the T-cell mitogen concanavalin A compared with the proliferative response of lean control mice. The ob/ob mouse may provide a model for the study of enhanced immunocompetence in obese individuals.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Thompson, C I -- Kreider, J W -- Black, P L -- Schmidt, T J -- Margules, D L -- New York, N.Y. -- Science. 1983 Jun 10;220(4602):1183-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6602379" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Female ; Immunity, Innate ; Lung Neoplasms/immunology ; Male ; Melanoma/*immunology ; Mice ; Mice, Inbred C57BL ; *Mice, Obese ; Neoplasm Metastasis ; Neoplasm Transplantation ; Neoplasms, Experimental/immunology ; Rats ; Receptors, Glucocorticoid/physiology ; T-Lymphocytes/*physiology
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    Red/Green color opponency at detection threshold (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-01-14
    Description: By means of visual stimnulus without temporal or spatial edges, we have achieved better isolation of chromatic signals at detection threshold than has been reported previously. Under various states of adaptation, the spectral sensitivity of the chromatic mechanism detecting middle- and long-wavelength lights corresponds with that deduced from suprathreshold red/green hue equilibriums.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Thornton, J E -- Pugh, E N Jr -- New York, N.Y. -- Science. 1983 Jan 14;219(4581):191-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6849131" target="_blank"〉PubMed〈/a〉
    Keywords: Color Perception/*physiology ; Humans ; Spectrum Analysis ; Time Factors
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    Monoclonal antibodies reveal the structural basis of antibody diversity (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-11-18
    Description: Hybridoma technology has made it possible to introduce into continuous culture normal antibody-forming cells and to obtain large amounts of the immunoglobulin produced by each of these cells. Examination of the structure of a number of monoclonal antibodies that react with a single antigen has provided new information on the structural basis of the specificity and affinity of antibodies. Comparisons of families of monoclonal antibodies derived from a single germ line gene revealed the importance of somatic mutation in generating antibody diversity. Monoclonal antibodies that react with variable regions of other monoclonals allow the further dissection and modulation of the immune response. Finally, the continued somatic instability of immunoglobulin genes in cultured antibody-forming cells makes it possible to determine the rate of somatic mutation and to generate mutant monoclonal antibodies that may be more effective serological reagents.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Teillaud, J L -- Desaymard, C -- Giusti, A M -- Haseltine, B -- Pollock, R R -- Yelton, D E -- Zack, D J -- Scharff, M D -- 5T32GM7288/GM/NIGMS NIH HHS/ -- AI05231/AI/NIAID NIH HHS/ -- AI10702/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1983 Nov 18;222(4625):721-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6356353" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Antibodies, Monoclonal/genetics/*immunology ; *Antibody Diversity ; Antibody Specificity ; Genes ; Hybridomas/immunology ; Immunoglobulin Idiotypes/immunology ; Immunoglobulin Variable Region/genetics ; Mice ; Mutation ; Protein Conformation ; Structure-Activity Relationship
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    Human endothelial cells: use of heparin in cloning and long-term serial cultivation (1983)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1983-11-11
    Description: Endothelial cells from human blood vessels were cultured in vitro, with doubling times of 17 to 21 hours for 42 to 79 population doublings. Cloned human endothelial cell strains were established for the first time and had similar proliferative capacities. This vigorous cell growth was achieved by addition of heparin to culture medium containing reduced concentrations of endothelial cell growth factor. The routine cloning and long-term culture of human endothelial cells will facilitate studying the human endothelium in vitro.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Thornton, S C -- Mueller, S N -- Levine, E M -- AG-00839/AG/NIA NIH HHS/ -- T32-CA-09171/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1983 Nov 11;222(4624):623-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6635659" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Division/drug effects ; Cells, Cultured ; Clone Cells/enzymology ; Endothelium/*cytology ; Growth Substances/pharmacology ; Heparin/*pharmacology ; Humans ; Time Factors
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    Bone cell differentiation and growth factors (1983)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1983-05-13
    Description: Bone morphogenetic protein and bone-derived growth factors are biochemical tools for research on induced cell differentiation and local mechanisms controlling cell proliferation. Bone morphogenetic protein irreversibly induces differentiation of perivascular mesenchymal-type cells into osteoprogenitor cells. Bone-derived growth factors are secreted by and for osteoprogenitor cells and stimulate DNA synthesis. Bone generation and regeneration are attributable to the co-efficiency of bone morphogenetic protein and bone-derived growth factors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Urist, M R -- DeLange, R J -- Finerman, G A -- DEO2103-17/DE/NIDCR NIH HHS/ -- New York, N.Y. -- Science. 1983 May 13;220(4598):680-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6403986" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Bone Development ; Bone Matrix/drug effects/physiology ; Bone Morphogenetic Proteins ; Bone Neoplasms/physiopathology ; Cattle ; Cell Differentiation ; DNA, Neoplasm/metabolism ; Dogs ; Growth Substances/*physiology ; Guinea Pigs ; Haplorhini ; Humans ; Insulin-Like Growth Factor II ; Mice ; *Osteogenesis ; Osteosarcoma/physiopathology ; Proteins/pharmacology/physiology ; Rabbits ; Rats
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    Recovery of normal topography in the somatosensory cortex of monkeys after nerve crush and regeneration (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-08-19
    Description: After median nerve fibers to glabrous skin on the hands of monkeys were crushed and allowed to regenerate, normal topographical organization was recovered in the representation of the hand in primary somatosensory cortex. Similar recovery of normal cortical organization may underlie the sensory restoration that usually follows nerve crush injury in humans.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wall, J T -- Felleman, D J -- Kaas, J H -- New York, N.Y. -- Science. 1983 Aug 19;221(4612):771-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6879175" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Aotus trivirgatus/physiology ; Brain Mapping ; Hand/innervation ; *Nerve Crush ; *Nerve Regeneration ; Somatosensory Cortex/*physiology ; Time Factors
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    DNA methylation decreases in aging but not in immortal cells (1983)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1983-06-03
    Description: When normal diploid fibroblasts from mice, hamsters, and humans were grown in culture, the 5-methylcytosine content of their DNA's markedly decreased. The greatest rate of loss of 5-methylcytosine residues was observed in mouse cells, which survived the least number of division. Immortal mouse cell lines had more stable rates of methylation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wilson, V L -- Jones, P A -- 1-T32-CA09320/CA/NCI NIH HHS/ -- R01-GM30892/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1983 Jun 3;220(4601):1055-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6844925" target="_blank"〉PubMed〈/a〉
    Keywords: 5-Methylcytosine ; *Aging ; Animals ; Cell Division ; Cell Line ; Cricetinae ; Cytosine/analogs & derivatives/metabolism ; DNA/metabolism/*physiology ; Fibroblasts/metabolism ; Humans ; Mesocricetus ; Methylation ; Mice ; Time Factors
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    Temporal selectivity in the central auditory system of the leopard frog (1983)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1983-03-04
    Description: Amplitude modulation is a predominant temporal feature in many vocal signals. The leopard frog, Rana pipiens, has a class of neurons in the central auditory system that respond selectively to particular rates of amplitude modulation; these neurons can be characterized by a temporal tuning curve. Such selectivity is absent in the peripheral auditory system. This type of transformation may be fundamental in processing temporal information in the vertebrate sensory nervous system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rose, G -- Capranica, R R -- NS-09244/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1983 Mar 4;219(4588):1087-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6600522" target="_blank"〉PubMed〈/a〉
    Keywords: Animal Communication ; Animals ; Auditory Pathways/*physiology ; Auditory Perception/*physiology ; Brain/physiology ; Rana pipiens/*physiology ; Time Factors
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    Leukotrienes: mediators of immediate hypersensitivity reactions and inflammation (1983)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1983-05-06
    Description: Arachidonic acid plays a central role in a biological control system where such oxygenated derivatives as prostaglandins, thromboxanes, and leukotrienes are mediators. The leukotrienes are formed by transformation of arachidonic acid into an unstable epoxide intermediate, leukotriene A4, which can be converted enzymatically by hydration to leukotriene B4, and by addition of glutathione to leukotriene C4. This last compound is metabolized to leukotrienes D4 and E4 by successive elimination of a gamma-glutamyl residue and glycine. Slow-reacting substance of anaphylaxis consists of leukotrienes C4, D4, and E4. The cysteinyl-containing leukotrienes are potent bronchoconstrictors, increase vascular permeability in postcapillary venules, and stimulate mucus secretion. Leukotriene B4 causes adhesion and chemotactic movement of leukocytes and stimulates aggregation, enzyme release, and generation of superoxide in neutrophils. Leukotrienes C4, D4, and E4, which are released from the lung tissue of asthmatic subjects exposed to specific allergens, seem to play a pathophysiological role in immediate hypersensitivity reactions. These leukotrienes, as well as leukotriene B4, have pro-inflammatory effects.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Samuelsson, B -- New York, N.Y. -- Science. 1983 May 6;220(4597):568-75.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6301011" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arachidonic Acids/metabolism/pharmacology/physiology ; Bronchi/drug effects ; Cats ; Chemical Phenomena ; Chemistry ; Cricetinae ; Guinea Pigs ; Haplorhini ; Humans ; Hypersensitivity, Immediate/*physiopathology ; Inflammation/*physiopathology ; Leukocytes/drug effects/metabolism ; Leukotriene B4/pharmacology/*physiology ; Mice ; Microcirculation/drug effects ; Rabbits ; Rats ; SRS-A/*physiology
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    Structure of a mouse submaxillary messenger RNA encoding epidermal growth factor and seven related proteins (1983)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1983-07-15
    Description: The structure of the messenger RNA (mRNA) encoding the precursor to mouse submaxillary epidermal growth factor (EGF) was determined from the sequence of a set of overlapping complementary DNA's (cDNA). The mRNA is unexpectedly large, about 4750 nucleotide bases, and predicts the sequence of preproEGF, a protein of 1217 amino acids (133,000 molecular weight). The EGF moiety (53 amino acids) is flanked by polypeptide segments of 976 and 188 amino acids at its amino and carboyxl termini, respectively. The amino terminal segment of the precursor contains seven peptides with sequences that are similar but not identical to EGF.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Scott, J -- Urdea, M -- Quiroga, M -- Sanchez-Pescador, R -- Fong, N -- Selby, M -- Rutter, W J -- Bell, G I -- 21344/PHS HHS/ -- New York, N.Y. -- Science. 1983 Jul 15;221(4607):236-40.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6602382" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Epidermal Growth Factor/biosynthesis/*genetics ; Humans ; Male ; Mice ; RNA, Messenger/*genetics ; Submandibular Gland/metabolism
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    Atypical pulmonary thrombosis caused by a toxic cyanobacterial peptide (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-06-24
    Description: Parenteral injection into mice of a toxic pentapeptide isolated from the cyanobacterium Microcystis aeruginosa induced thrombocytopenia, pulmonary thrombi, and hepatic congestion. The lethality of the toxin was unaffected by several anticoagulants. The acute liver damage that follows injection of the toxin has been attributed to direct action on liver cells but may be due to hypoxemia, heart failure, and shock.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Slatkin, D N -- Stoner, R D -- Adams, W H -- Kycia, J H -- Siegelman, H W -- New York, N.Y. -- Science. 1983 Jun 24;220(4604):1383-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6407109" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Bacterial Toxins ; Blood Coagulation Tests ; Cyanobacteria/*metabolism ; Female ; Liver/pathology ; Lung/pathology ; Marine Toxins/*adverse effects ; Mice ; Organ Size/drug effects ; Platelet Count ; Pulmonary Embolism/*chemically induced/microbiology/pathology ; Thrombocytopenia/chemically induced
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    Postnatally induced formation of the corpus callosum in acallosal mice on glia-coated cellulose bridges (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-06-03
    Description: Developing axons of the corpus callosum of mice are guided across the cerebral midline by a slinglike glial structure that forms transiently between the hemispheres. If the "sling" is cut at precallosal stages, the would-be callosal fibers whirl into paired neuromas adjacent to the longitudinal cerebral fissure. In experiments on such surgically acallosal animals, the aberrant commissural axons maintained a potential to regrow across the hemispheres at prenatal and early postnatal stages if they were presented with a properly aligned, glia-covered scaffold spanning the hemispheres.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Silver, J -- Ogawa, M Y -- NS-15731/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1983 Jun 3;220(4601):1067-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6844928" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Axons/physiology ; Brain/embryology/physiology ; Cellulose ; Corpus Callosum/embryology/*growth & development ; Embryo, Mammalian/physiology ; Fetus/physiology ; Mice ; Mice, Inbred BALB C ; Mice, Inbred C57BL ; Neuroglia/physiology
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    Recombination during gene transfer into mouse cells can restore the function of deleted genes (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-01-14
    Description: Two plasmids containing nonoverlapping deletions of the herpes simplex virus thymidine kinase gene were introduced into thymidine kinase-deficient mouse L cells by DNA-mediated gene transfer. Thymidine kinase-producing transformants were generated by a mixture of the two plasmids at a frequency significantly greater than that generated by either plasmid alone. Southern blot analyses demonstrated that functional thymidine kinase genes were generated by homologous recombination between the two deletion mutants.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Small, J -- Scangos, G -- New York, N.Y. -- Science. 1983 Jan 14;219(4581):174-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6294829" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Cells, Cultured ; Chromosome Deletion ; *Genetic Engineering ; Mice ; Mutation ; *Plasmids ; *Recombination, Genetic ; Simplexvirus ; Thymidine Kinase/*genetics
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    Hemagglutinin variants of reovirus type 3 have altered central nervous system tropism (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-04-29
    Description: Variants of the Dearing strain of reovirus type 3 with antigenically altered hemagglutinin proteins are much less neurovirulent than the parental virus. When injected intracerebrally into mice these variants infected a subset of the brain neurons that were infected by the parental virus. When injected intraperitoneally, the variants did not spread to the brain. These results indicate that minor modifications of the reovirus hemagglutinin dramatically alter the ability of the virus to spread into and injure the central nervous system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Spriggs, D R -- Bronson, R T -- Fields, B N -- NS-16998-01/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1983 Apr 29;220(4596):505-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6301010" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Monoclonal/immunology ; Brain/pathology ; Brain Diseases/*microbiology/pathology ; Hemagglutination Tests ; Mammalian orthoreovirus 3/immunology/*pathogenicity ; Mice ; Reoviridae/*pathogenicity ; Reoviridae Infections/microbiology/pathology
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    Rapid degradation of "new" acetylcholine receptors at neuromuscular junctions (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-10-07
    Description: Acetylcholine receptors at innervated neuromuscular junctions are very stable, with half-lives reported to be 6 to 13 days. Their turnover is described as a first-order process, implying a single population of receptors. In this study, two subpopulations of acetylcholine receptors at normally innervated junctions have been identified. One has a rapid turnover rate with a half-life of 18.7 hours, similar to that of extrajunctional receptors, and the other has a slow turnover rate with a half-life of 12.4 days. The rapidly turned over subpopulation represents approximately 20 percent of the total junctional receptors. This finding may account for the discrepancies in previous reports of turnover rates and may explain the rapid reversibility in vivo of agents that "irreversibly" block acetylcholine receptors. This finding also implies that the synthesis rate of junctional acetylcholine receptors may be higher than previous estimates. The rapidly turned-over subpopulation may represent receptors that were newly inserted into the neuromuscular junction and that were not yet stabilized by an influence of the motor nerve.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stanley, E F -- Drachman, D B -- 5 P01 NS10920/NS/NINDS NIH HHS/ -- 5 R01 HD04817/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1983 Oct 7;222(4619):67-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6623057" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bungarotoxins ; Diaphragm ; Kinetics ; Mice ; Neuromuscular Junction/*metabolism ; Receptors, Cholinergic/biosynthesis/classification/*metabolism ; Synaptic Membranes/metabolism
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    Bovine x mouse hybridomas that secrete bovine immunoglobulin G1 (1983)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1983-04-29
    Description: The interspecific fusion of normal bovine lymphocytes with a nonsecreting mouse hybridoma produced stable cell lines secreting bovine immunoglobulins. One of these lines has continued to secrete immunoglobulin G1 (5 to 10 micrograms per milliliter) for over 16 months. The bovine x mouse hybrid cells can be expected to provide bovine monoclonal immunoglobulins for sequencing studies and for use as serological standards as well as to provide messenger RNA for cloning bovine immunoglobulin genes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Srikumaran, S -- Guidry, A J -- Goldsby, R A -- New York, N.Y. -- Science. 1983 Apr 29;220(4596):522-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6403985" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Monoclonal/biosynthesis ; Cattle ; Cell Line ; Hybridomas/*immunology ; Immunoglobulin G/*biosynthesis/immunology/isolation & purification ; Immunoglobulin Heavy Chains/immunology ; Immunoglobulin Light Chains/immunology ; Immunoglobulin M/immunology ; Mice ; Radioimmunoassay
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    Genes of the major histocompatibility complex in mouse and man (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-11-18
    Description: The genes of the major histocompatibility complex code for cell-surface molecules that play an important role in the generation of the immune response. These genes and molecules have been studied intensively over the last five decades by geneticists, biochemists, and immunologists, but only recently has the isolation of the genes by molecular biologists facilitated their precise characterization. Many surprising findings have been made concerning their structure, multiplicity, organization, function, and evolution.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Steinmetz, M -- Hood, L -- New York, N.Y. -- Science. 1983 Nov 18;222(4625):727-33.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6356354" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Evolution ; Chromosome Mapping ; Genes ; H-2 Antigens/*genetics ; HLA Antigens/*genetics ; Histocompatibility Antigens/genetics ; Humans ; *Major Histocompatibility Complex ; Mice ; Polymorphism, Genetic ; Protein Conformation
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    Serological visualization of interleukin 2 (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-06-10
    Description: Interleukin 2, a lymphokine that acts as a second signal of cellular immune response by way of its action as a T-cell growth factor, was morphologically identified by immunoperoxidase staining. With the use of a monoclonal antibody to interleukin 2 and several complex-forming antisera, the lymphokine was readily distinguished in cytocentrifuge preparations of peripheral blood leukocytes stimulated with a T-cell mitogen. When preparations of cloned interleukin 2 producer and responder cells were stained by the same procedures, discrete patterns of both responder and producer cell phenotypes were revealed. Interleukin 2 producer T cells exhibited a characteristic intense, ringlike cytoplasmic staining, whereas the responder cells (as exemplified by interleukin 2-dependent cell lines) exhibited a less intensive, spotlike membrane staining. In addition, intense membrane localization of interleukin 2, reminiscent of potential capping phenomena, could be observed in stained preparations of cloned responder cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Steinmann, G -- Conlon, P -- Hefeneider, S -- Gillis, S -- New York, N.Y. -- Science. 1983 Jun 10;220(4602):1188-90.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6344215" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Monoclonal/immunology ; Cell Line ; Humans ; Immunoenzyme Techniques ; Interleukin-2/*physiology ; Leukocytes/physiology ; Mice ; T-Lymphocytes/physiology
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    Human macrophages armed with murine immunoglobulin G2a antibodies to tumors destroy human cancer cells (1983)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1983-08-26
    Description: Macrophages isolated from tumor-bearing patients as well as cultured human monocytes express Fc receptors that cross-react strongly with murine immunoglobulins of the G2a but only slightly or not at all with the G1, G2b, or G3 subclasses. Such macrophages in the presence of murine immunoglobulin G2a monoclonal antibodies to tumors mediated the killing of tumor cells in vitro. These data suggest that monoclonal antibodies of the G2a subclass may be useful in the immunotherapy of human cancer.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Steplewski, Z -- Lubeck, M D -- Koprowski, H -- CA-10815/CA/NCI NIH HHS/ -- CA-21124/CA/NCI NIH HHS/ -- CA-25874/CA/NCI NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1983 Aug 26;221(4613):865-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6879183" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Monoclonal/*immunology ; Cells, Cultured ; Cytotoxicity, Immunologic ; Humans ; *Immunity, Cellular ; Immunoglobulin G/immunology ; Immunotherapy ; Macrophages/*immunology ; Mice ; Monocytes/immunology ; Neoplasms, Experimental/immunology/therapy ; Receptors, Fc/*immunology ; Species Specificity
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    Biogenesis of ornithine transcarbamylase in spfash mutant mice: two cytoplasmic precursors, one mitochondrial enzyme (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-10-28
    Description: Extracts of liver from hemizygous affected mice with the X-linked spfash mutation have 5 to 10 percent of normal ornithine transcarbamylase (OTC) activity, yet the homogeneous enzyme isolated from these extracts is identical to that in controls. The OTC messenger RNA from mutant livers programs the synthesis of two distinct OTC precursor polypeptides--one normal in size, the other distinctly elongated. Both precursors are imported and proteolytically processed by mitochondria, but only the normal one is assembled into active trimer. This novel phenotype may result from a mutation in the structural gene for OTC leading, primarily, to aberrant splicing of OTC messenger RNA and, secondarily, to formation of a structurally altered precursor whose posttranslational pathway is ultimately futile because its mature mitochondrial form is not capable of assembly and functional expression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rosenberg, L E -- Kalousek, F -- Orsulak, M D -- AM 09527/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1983 Oct 28;222(4622):426-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6623083" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Genes ; Liver/enzymology ; Macromolecular Substances ; Mice ; Mice, Mutant Strains/genetics/physiology ; Mitochondria, Liver/enzymology ; Mutation ; Ornithine Carbamoyltransferase/*genetics ; Protein Precursors/genetics ; Protein Processing, Post-Translational ; RNA, Messenger/genetics
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    Deformed whiskers in mice infected with certain exogenous murine leukemia viruses (1983)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1983-08-05
    Description: Mice infected at birth with replication competent Friend, Moloney, CasBr-M, C2S-M, and 1504-A murine leukemia viruses developed abnormalities of the vibrissae consisting of erratic curvature, shortening, and loss. A number of other virus strains, as well as endogenous AKR-type ecotropic virus and AKR-type, mink cell focus-inducing (MCF) viruses, did not produce these abnormalities. In mice with erythroid and myeloid leukemia, the perivibrissal sinus is the site of extramedullary hematopoiesis, but this did not appear to be the basis of the deformities. Genetic evidence indicated that newly arisen MCF-type recombinant viruses are involved in the pathogenesis of the abnormalities, at least with some of the virus systems studied.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rowe, W P -- N01-AI-22673/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1983 Aug 5;221(4610):562-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6306769" target="_blank"〉PubMed〈/a〉
    Keywords: AKR murine leukemia virus ; Animals ; Friend murine leukemia virus ; Hair/*pathology ; Leukemia Virus, Murine ; Leukemia, Experimental/*pathology ; Mice ; Mice, Inbred AKR ; Mice, Inbred C57BL ; Moloney murine leukemia virus
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    Biotinated probe containing a long-terminal repeat hybridized to a mouse colon tumor and normal tissue (1983)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1983-12-23
    Description: The cloned complementary DNA pMCT-1, which contains an intracisternal A particle long-terminal repeat, is more highly expressed in a mouse colon tumor than in the normal mouse colon. In situ hybridization of biotin-substituted pMCT-1 to fixed frozen sections shows that expression of pMCT-1 is seen throughout the tumor and is highly heterogeneous on a cellular basis, while expression is undetectable in any cell in the normal colonic mucosa.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Royston, M E -- Augenlicht, L H -- CA 22367/CA/NCI NIH HHS/ -- CA 33383/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1983 Dec 23;222(4630):1339-41.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6689218" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biotin ; Colon/*analysis ; Colonic Neoplasms/*genetics/pathology ; Dna ; Interphase ; Intestinal Mucosa/analysis ; Male ; Mice ; Mice, Inbred BALB C ; *Nucleic Acid Hybridization ; RNA, Neoplasm/*genetics ; Repetitive Sequences, Nucleic Acid ; *Transcription, Genetic
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    A cancer-associated lactate dehydrogenase is expressed in normal retina (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-07-15
    Description: An unusual isozyme of lactate dehydrogenase, lactate dehydrogenase k, is found in high concentrations in cultured cells transformed by the Kirsten murine sarcoma virus and in many human cancer tissues. In experiments described here high levels of a lactate dehydrogenase k activity were detected in extracts of normal rodent retina. This activity had the same key properties as the human tumor isozyme, namely, a highly cathodic electrophoretic mobility and inhibition of enzymatic activity by oxygen and 5',5'-dipurinenucleoside tetraphosphates. Expression of this activity in the retina may be related to the high aerobic glycolysis characteristic of the retina, a metabolic feature shared with many tumors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Saavedra, R A -- Anderson, G R -- CA32022/CA/NCI NIH HHS/ -- GM28098/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1983 Jul 15;221(4607):291-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6857286" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Transformation, Neoplastic/metabolism ; Chickens ; Electrophoresis ; Glycolysis ; Guinea Pigs ; Humans ; Isoenzymes ; L-Lactate Dehydrogenase/antagonists & inhibitors/*metabolism ; Mice ; Mice, Inbred Strains ; Neoplasms/*enzymology ; Oxygen/pharmacology ; Rats ; Retina/*enzymology
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    Human endometrial adenocarcinoma transplanted into nude mice: growth regulation by estradiol (1983)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1983-01-07
    Description: A model for studying the growth of primary tumors of human endometrium and its regulation by 17 beta-estradiol has been developed in which ovariectomized nude mice are used as recipients. The receptors for sex steroids are maintained during serial transplantation of the tumor in this system. Although the rate of growth of receptor-negative endometrial tumors transplanted into ovariectomized nude mice is unaffected by the sustained presence or absence of estradiol, the growth of receptor-positive tumors is significantly increased by estradiol. Receptor-positive tumors treated with estradiol produced elevated concentrations of progesterone receptor. That the progesterone receptor is functional in this tumor is evident from the induction of estradiol 17 beta-dehydrogenase activity upon progestin administration. These findings are consistent with receptor-mediated regulation of growth of endometrial carcinoma.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Satyaswaroop, P G -- Zaino, R J -- Mortel, R -- New York, N.Y. -- Science. 1983 Jan 7;219(4580):58-60.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6849115" target="_blank"〉PubMed〈/a〉
    Keywords: Adenocarcinoma/metabolism/*pathology ; Animals ; Castration ; Estradiol/*physiology ; Female ; Mice ; Mice, Nude ; Neoplasm Transplantation ; Receptors, Estrogen/metabolism ; Receptors, Progesterone/metabolism ; Transplantation, Heterologous ; Uterine Neoplasms/metabolism/*pathology
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    Altered activity patterns during development reduce neural tuning (1983)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1983-09-16
    Description: Neonatal mice were reared in an acoustic environment that repetitively entrained activity in a large proportion of primary auditory afferents during the period when the frequency tuning of auditory neurons normally develops. The tuning curves obtained from these mice were significantly broader than those of normally reared mice of the same age. This suggests that the normal frequency tuning of neurons was prevented or delayed by synchronizing the pattern of activity imposed on the auditory pathway.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sanes, D H -- Constantine-Paton, M -- 5T32GM07312/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1983 Sep 16;221(4616):1183-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6612332" target="_blank"〉PubMed〈/a〉
    Keywords: Acoustic Stimulation ; Animals ; Animals, Newborn ; Auditory Pathways/*physiology ; Evoked Potentials, Auditory ; Inferior Colliculi/physiology ; Mice ; Mice, Inbred C57BL ; Models, Neurological
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    Tumor cells secrete a vascular permeability factor that promotes accumulation of ascites fluid (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-02-25
    Description: Tumor ascites fluids from guinea pigs, hamsters, and mice contain activity that rapidly increases microvascular permeability. Similar activity is also secreted by these tumor cells and a variety of other tumor cell lines in vitro. The permeability-increasing activity purified from either the culture medium or ascites fluid of one tumor, the guinea pig line 10 hepatocarcinoma, is a 34,000- to 42,000-dalton protein distinct from other known permeability factors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Senger, D R -- Galli, S J -- Dvorak, A M -- Perruzzi, C A -- Harvey, V S -- Dvorak, H F -- New York, N.Y. -- Science. 1983 Feb 25;219(4587):983-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6823562" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Ascites/physiopathology ; Ascitic Fluid/physiology ; *Capillary Permeability ; Cricetinae ; Guinea Pigs ; Mice ; Neoplasms, Experimental/*physiopathology
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  • 82
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    Bromine residue at hydrophilic region influences biological activity of aplysiatoxin, a tumor promoter (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-12-16
    Description: Aplysiatoxin and debromoaplysiatoxin, which are isolated from the seaweed, Lyngbya gracilis, differ in their chemical structure only by the presence or absence of a bromine residue in the hydrophilic region. The function and the structure-activity relation of the hydrophilic region are not known. Aplysiatoxin increased malignant transformation, stimulated DNA synthesis, and inhibited the binding of phorbol-12,13-dibutyrate and epidermal growth factor to cell receptors. Debromoaplysiatoxin inhibited the binding of these two substances as strongly as aplysiatoxin but did not increase malignant transformation or stimulate DNA synthesis. These results indicate that a slight change in the chemical structure of the hydrophilic region of aplysiatoxin affects its abilities to increase cell transformation and stimulate DNA synthesis and that the abilities of the tumor promoters to inhibit the binding of phorbol-12,13-dibutyrate and epidermal growth factor are dissociable from their abilities to increase cell transformation and stimulate DNA synthesis under some circumstances.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shimomura, K -- Mullinix, M G -- Kakunaga, T -- Fujiki, H -- Sugimura, T -- New York, N.Y. -- Science. 1983 Dec 16;222(4629):1242-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6316505" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Caenorhabditis elegans Proteins ; Carcinogens/*pharmacology ; Carrier Proteins ; Cell Line ; Cell Transformation, Neoplastic/*drug effects ; Chemical Phenomena ; Chemistry ; DNA/biosynthesis ; Epidermal Growth Factor/metabolism ; Lactones/analysis/*pharmacology ; *Lyngbya Toxins ; Mice ; Phorbol 12,13-Dibutyrate ; Phorbol Esters/metabolism ; *Protein Kinase C ; Receptor, Epidermal Growth Factor ; Receptors, Cell Surface/metabolism ; *Receptors, Drug ; Structure-Activity Relationship
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  • 83
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    Thrombin stimulation of guanosine 3',5'-monophosphate formation in murine neuroblastoma cells (clone N1E-115) (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-08-05
    Description: Thrombin, the central regulatory enzyme in coagulation, when incubated in nanomolar concentrations with murine neuroblastoma cells produced a rapid and marked increase in tritiated guanosine 3',5'-monophosphate (cyclic GMP) formation that was blocked by hirudin and competitively antagonized by dansylarginine N-(3-ethyl-1,5-pentanediyl)amide. Diisopropylphosphofluoridate-inactivated thrombin as well as the serine protease trypsin were markedly less potent and less effective than alpha-thrombin in producing this effect. Thrombin-stimulated cyclic GMP formation was inhibited by mepacrine and nordihydroguaiaretic acid but unaffected by indomethacin, suggesting that lipoxygenase metabolites of arachidonic acid are involved in the response. These results suggest that a thrombin-like protease in the brain may be involved with the function of neurons or that thrombin interactions with nerve cells, such as those following cerebral hemorrhage or other trauma of the central nervous system, may be important in the subsequent neuropathology.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Snider, R M -- Richelson, E -- HL07111/HL/NHLBI NIH HHS/ -- MH27692/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1983 Aug 5;221(4610):566-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6306770" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arginine/analogs & derivatives/pharmacology ; Blood Platelets/physiology ; Catechols/pharmacology ; Clone Cells ; Cyclic GMP/analysis/*biosynthesis ; *Dansyl Compounds ; Hirudins/pharmacology ; Indomethacin/pharmacology ; Masoprocol ; Mice ; Neuroblastoma/analysis/*metabolism ; Thrombin/analysis/*pharmacology ; Trypsin/analysis
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  • 84
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    X chromosome-linked transmission and expression of retroviral genomes microinjected into mouse zygotes (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-08-19
    Description: A genomic clone consisting of the Moloney leukemia proviral genome with moderately repetitive mouse sequences was microinjected into the pronucleus of a mouse zygote. An animal was derived that carried multiple copies of proviral DNA in a tandem array. No evidence for homologous recombination was obtained. The viral genome was expressed in this animal and was transmitted as a single unit to its offspring. Subsequent breeding studies revealed that the proviral DNA had integrated on an X chromosome.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stewart, C -- Harbers, K -- Jahner, D -- Jaenisch, R -- New York, N.Y. -- Science. 1983 Aug 19;221(4612):760-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6683871" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Nucleus/physiology ; Female ; Gene Expression Regulation ; Genes, Viral ; Mice ; Microinjections ; Moloney murine leukemia virus/*genetics ; Recombination, Genetic ; Sex Chromosomes/*physiology ; X Chromosome/*physiology
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  • 85
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    Stable antibody-producing murine hybridomas (1983)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1983-03-11
    Description: A method is described for obtaining antibody-producing hybridomas that are preferentially retained in cultures of fused mouse spleen and myeloma cells. Hybridomas are produced by fusing mouse myeloma cells that are deficient in adenosine phosphoribosyltransferase (APRT) with mouse spleen cells containing Robertsonian 8.12 translocation chromosomes. The cell fusion mixtures are exposed to a culture medium that can be utilized only by APRT-positive cells, which results in the elimination of both unfused APRT-deficient myeloma cells and non-antibody-producing APRT-deficient hybridomas that arise by segregation of the 8.12 translocation chromosomes containing the APRT genes and the active heavy chain immunoglobulin gene.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Taggart, R T -- Samloff, I M -- 1 P01 CA 16042/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1983 Mar 11;219(4589):1228-30.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6402815" target="_blank"〉PubMed〈/a〉
    Keywords: Adenine Phosphoribosyltransferase/deficiency ; Animals ; Dosage Compensation, Genetic ; Hybridomas/*physiology ; Immunoglobulin Heavy Chains/genetics ; Mice ; Mice, Mutant Strains ; Selection, Genetic ; Translocation, Genetic
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  • 86
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    Fibronectin binds to some bacteria but does not promote their uptake by phagocytic cells (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-04-08
    Description: The involvement of plasma fibronectin in phagocytosis of bacteria was investigated by testing the binding of fibronectin to several species of bacteria and by evaluating the ability of fibronectin to promote binding and endocytosis of two species of these bacteria by phagocytic cells. Fibronectin binds non-covalently to Gram-positive and Gram-negative bacteria and to yeast but did not appear to be necessary or sufficient for uptake of Staphylococcus aureus and Salmonella typhimurium by several different phagocytic cell types.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Van de Water, L -- Destree, A T -- Hynes, R O -- R01CA17007/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1983 Apr 8;220(4593):201-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6338594" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bacteria/*metabolism ; Cell Line ; Cricetinae ; Endocytosis ; Fibronectins/*metabolism ; Humans ; Macrophages/physiology ; Mice ; Opsonin Proteins/physiology ; *Phagocytosis ; Rabbits ; Salmonella typhimurium/metabolism ; Sepsis/immunology ; Staphylococcus aureus/metabolism
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  • 87
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    Inhibition by alcohols of the localization of radioactive nitrosonornicotine in sites of tumor formation (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-07-01
    Description: Oral administration of ethanol, n-butanol, or t-butanol to mice 20 minutes before injection of carbon-14-labeled nitrosonornicotine inhibited the localization of radioactivity in bronchial and salivary duct epithelium and in the liver. Localization of radioactivity in the nasal epithelium and esophagus was not significantly reduced. These alcohols therefore may selectively inhibit tumor formation in three of the five sites where this carcinogen typically acts.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Waddell, W J -- Marlowe, C -- New York, N.Y. -- Science. 1983 Jul 1;221(4605):51-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6857261" target="_blank"〉PubMed〈/a〉
    Keywords: 1-Butanol ; Alcohol Drinking ; Alcohols/*pharmacology ; Animals ; Butanols/pharmacology ; Carcinogens/*antagonists & inhibitors ; Ethanol/pharmacology ; Humans ; Liver/drug effects ; Lung/drug effects ; Male ; Mice ; Mice, Inbred C57BL ; Neoplasms/*chemically induced ; Nitrosamines/*pharmacology ; Salivary Glands/drug effects ; Smoking ; tert-Butyl Alcohol
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  • 88
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    Effects of tyrosine administration on serum biopterin in normal controls and patients with Parkinson's disease (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-01-07
    Description: After administration of tyrosine, total concentration of biopterin, the cofactor for tyrosine hydroxylase, was increased in the striatum, adrenal glands, and serum of rats, and in the serum of humans. Serum biopterin is lower in patients with Parkinson's disease than in normal controls. After oral administration of tyrosine, the increase in serum biopterin concentration was smaller in patients with Parkinson's disease (less than twofold) than in healthy controls (three-to sevenfold). These results suggest that tyrosine may have a regulatory role in biopterin biosynthesis and that patients with Parkinson's disease may have some abnormality in the regulation of biopterin biosynthesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yamaguchi, T -- Nagatsu, T -- Sugimoto, T -- Matsuura, S -- Kondo, T -- Iizuka, R -- Narabayashi, H -- New York, N.Y. -- Science. 1983 Jan 7;219(4580):75-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6849120" target="_blank"〉PubMed〈/a〉
    Keywords: Administration, Oral ; Adrenal Glands/metabolism ; Alanine/pharmacology ; Animals ; Biopterin/*blood ; Corpus Striatum/metabolism ; Humans ; Injections, Intraperitoneal ; Liver/metabolism ; Male ; Parkinson Disease/*blood ; Pteridines/*blood ; Rats ; Rats, Inbred Strains ; Time Factors ; Tyrosine/administration & dosage/*pharmacology
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  • 89
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    In vivo carbon-13 nuclear magnetic resonance studies of mammals (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-11-06
    Description: Natural abundance carbon-13 nuclear magnetic resonances (NMR) from human arm and rat tissues have been observed in vivo. These signals arise primarily from triglycerides in fatty tissue. Carbon-13 NMR was also used to follow, in a living rat, the conversion of C-1-labeled glucose, which was introduced into the stomach, to C-1-labeled liver glycogen. The carbon-13 sensitivity and resolution obtained shows that natural abundance carbon-13 NMR will be valuable in the study of disorders in fat metabolism, and that experiments with substrates labeled with carbon-13 can be used to study carbohydrate metabolism in vivo.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Alger, J R -- Sillerud, L O -- Behar, K L -- Gillies, R J -- Shulman, R G -- Gordon, R E -- Shae, D -- Hanley, P E -- AM27121/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1981 Nov 6;214(4521):660-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7292005" target="_blank"〉PubMed〈/a〉
    Keywords: Adipose Tissue/drug effects ; Animals ; Carbon/*metabolism ; Carbon Isotopes ; Glucose/metabolism ; Humans ; Liver Glycogen/metabolism ; Magnetic Resonance Spectroscopy/*methods ; Models, Structural ; Rats ; Time Factors
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  • 90
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    Differentiation of murine bone marrow stem cells in vitro: long-term growth promoted by a lymphocyte-derived mediator (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-01-02
    Description: In attempts to induce differentiation of lymphoid cells from hematopoietic stem cells in vitro, the effects of allogeneic effect factor on the growth of murine bone marrow cultures were studied. Allogeneic effect factor is a soluble mediator derived from mixed secondary murine leukocyte cultures. For several weeks it supported the growth of bone marrow cultures, as indicated by the maintenance of stem cell activity, cellular proliferation, and heterogeneity. Another lymphokine, T cell growth factor, did not, Pre-T lymphocytes could be detected in these cultures for several weeks.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Altman, A -- Gilmartin, T D -- Katz, D H -- CA-25803/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1981 Jan 2;211(4477):65-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6934621" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Bone Marrow Cells ; Cell Adhesion ; Cell Communication ; Cell Differentiation/*drug effects ; Colony-Forming Units Assay ; Glycoproteins/*pharmacology ; Hematopoietic Stem Cells/*cytology ; Histocompatibility Antigens Class II ; Lymph Nodes/cytology ; Lymphokines/*pharmacology ; Mice ; Mitogens
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  • 91
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    Myeloma neuropathy: passive transfer from man to mouse (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-08-28
    Description: Mice were injected daily, for up to 10 weeks, with purified monoclonal immunoglobulin G from patients with myelomatous polyneuropathy or benign gammopathy. The animals developed a demyelinating polyneuropathy with slowed nerve conduction velocities. The putative antinerve factor may be an antibody since injection of Fab fragments from the monoclonal immunoglobulin G produced a similar demyelination. This provides evidence of a circulating factor in the serum of myeloma patients with polyneuropathy that reproduces typical features of the human disease on passive transfer. This disorder is thus distinguished from other neuropathies that occur as remote effects of malignant disease but have no identified pathogenic factors associated with them.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Besinger, U A -- Toyka, K V -- Anzil, A P -- Fateh-Mognadam, A -- Rouscher, R -- Heininger, K -- New York, N.Y. -- Science. 1981 Aug 28;213(4511):1027-30.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7268405" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Autoimmune Diseases/*immunology ; Demyelinating Diseases/*etiology/immunology/physiopathology ; Female ; Humans ; Immunization, Passive ; Immunoglobulin Fab Fragments ; Immunoglobulin Fc Fragments ; Immunoglobulin G ; Mice ; Multiple Myeloma/*complications ; Neural Conduction
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  • 92
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    Reversal diabetes by islet transplantation: vulnerability of the established allograft (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-09-11
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bowen, K M -- Prowse, S J -- Lafferty, K J -- AM28126-01/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1981 Sep 11;213(4513):1261-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6791285" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Ascitic Fluid/cytology ; Blood Glucose/metabolism ; Diabetes Mellitus, Experimental/*therapy ; *Graft Rejection ; Islets of Langerhans/immunology ; *Islets of Langerhans Transplantation ; Mice ; Organ Culture Techniques ; Transplantation, Homologous
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  • 93
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    Conversion of 3T3-L1 fibroblasts to fat cells by an inhibitor of methylation: effect of 3-deazaadenosine (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-03-13
    Description: 3-Deazaadenosine, an inhibitor of methylation, increased the frequency of conversion of 3T3-L1 fibroblasts to fat cells in a dose-dependent manner. Once converted, the 3T3-L1 fat cells retained their adipose morphology and accumulated triglycerides even when 3-deazaadenosine was removed from the culture medium. 3-Deazaadenosine may perturb cellular methylation and thereby lead to an increase in the frequency of differentiation of 3T3-L1 fibroblasts to fat cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chiang, P K -- New York, N.Y. -- Science. 1981 Mar 13;211(4487):1164-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7466386" target="_blank"〉PubMed〈/a〉
    Keywords: Adipose Tissue/*cytology ; Animals ; Carnitine/pharmacology ; Cell Differentiation/*drug effects ; Cells, Cultured ; Dose-Response Relationship, Drug ; Fibroblasts/cytology ; Methylation ; Mice ; Ribonucleosides/*pharmacology ; Tubercidin/*pharmacology
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  • 94
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    Behavioral effects of lead and Toxocara canis in mice (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-09-04
    Description: Adult mice were administered the common parasite Toxocara canis or lead or both. The parasite clearly altered mouse performance on tests of exploration, activity, learning, and motor coordination; behavioral effects in mice receiving lead alone were less general. Consequence of Toxocara administration appeared attenuated in animals receiving both agents. Parasite larvae were found in the central nervous system in all infected mice.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dolinsky, Z S -- Burright, R G -- Donovick, P J -- Glickman, L T -- Babish, J -- Summers, B -- Cypess, R H -- 08-K4AI00301A-03/AI/NIAID NIH HHS/ -- 08R1AI1478A-03/AI/NIAID NIH HHS/ -- 5S07RR0749-04/RR/NCRR NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1981 Sep 4;213(4512):1142-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7268424" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Ascariasis/*complications ; Behavior, Animal/*physiology ; Brain/parasitology ; Disease Models, Animal ; Lead Poisoning/*complications/physiopathology ; Male ; Mice ; Toxocariasis/*complications/physiopathology
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  • 95
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    Delta9-tetrahydrocannabinol increase plasma testosterone concentrations in mice (1981)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1981-07-31
    Description: Oral administration of delta 9-tetrahydrocannabinol had a biphasic effect on plasma testosterone concentrations in male mice, causing rapid sustained increases at low doses and subsequent decreases at higher doses. In hypophysectomized and intact mice receiving gonadotropins (human chorionic gonadotropin), treatment with delta 9-tetrahydrocannabinol maintained higher plasma testosterone concentrations. Thus, this cannabinoid may interact with gonadotropin and directly influence testicular steroidogenesis in vivo.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dalterio, S -- Bartke, A -- Mayfield, D -- 1R01 DA 02/DA/NIDA NIH HHS/ -- P 30 HD 10202/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1981 Jul 31;213(4507):581-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6264607" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Chorionic Gonadotropin/pharmacology ; Dronabinol/*analogs & derivatives/pharmacology ; Hypophysectomy ; Kinetics ; Luteinizing Hormone/*blood ; Male ; Mice ; Testosterone/*blood
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  • 96
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    A conjugate of alpha-amanitin and monoclonal immunoglobulin G to Thy 1.2 antigen is selectively toxic to T lymphoma cells (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-09-18
    Description: A covalent conjugate of an alpha-amanitin azo derivative and a monoclonal immunoglobulin G to the Thy 1.2 antigen on murine T lymphocytes was synthesized. The conjugate was 375- to 750-fold more inhibitory to murine T lymphoma S49.1 cells than the unconjugated derivative. At 0.7 X 10(-7) to 1.5 X 10(-7) M and at 4 X 10(-7) M amanitin equivalents, the conjugate inhibited protein synthesis in S49.1 cells by 50 percent and 80 to 96 percent, respectively. At these concentrations, mutant Thy l-deficient S49 cells and other murine lymphoma lacking Thy l altogether or carrying Thy 1.1 antigens were unaffected. This result demonstrated the potential for targeting amanitin to specific cell types.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Davis, M T -- Preston, J F 3rd -- R01 CA 19043/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1981 Sep 18;213(4514):1385-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6115471" target="_blank"〉PubMed〈/a〉
    Keywords: Amanitins/*administration & dosage ; Amino Acids/metabolism ; Animals ; Antibodies/administration & dosage ; Antibodies, Monoclonal ; Antigens, Surface/*immunology ; Antigens, Thy-1 ; Cells, Cultured ; Clone Cells/immunology ; Hybrid Cells/immunology ; Immunoglobulin G/*administration & dosage ; Lymphoma/*drug therapy ; Membrane Proteins/*immunology ; Mice ; Neoplasms, Experimental/drug therapy ; T-Lymphocytes/drug effects
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 97
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    Ethanol reveals novel mercury detoxification step in tissues (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-09-04
    Description: Volatile mercury was produced de novo by mouse tissue homogenates that contained mercuric ions. Ethanol stimulated the release of tissue mercury into the vapor phase, and the mechanism appears to be an inhibition of reoxidation of volatile mercury. Components responsible for mercury volatilization are heat-labile. The highest volatilizing activity in the liver is associated with the soluble fraction obtained after centrifugation at 105,000g.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dunn, J D -- Clarkson, T W -- Magos, L -- 01248/PHS HHS/ -- ES 01247/ES/NIEHS NIH HHS/ -- GM 07141/GM/NIGMS NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1981 Sep 4;213(4512):1123-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7268418" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Compartmentation ; Cell-Free System ; Cysteine ; Ethanol/*pharmacology ; Gases ; *Inactivation, Metabolic ; Kidney/*metabolism ; Liver/*metabolism ; Mercury/*metabolism ; Mice ; Oxidation-Reduction
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 98
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    Modification of the discharge of vagal cardiac neurons during learned heart rate change (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-10-16
    Description: Visually conditioned heart rate change in the pigeon has been developed as a vertebrate model system for the cellular neurophysiological analysis of associative learning. In previous studies of the "final common path," it was shown that both the vagal and sympathetic cardiac innervations contribute to this response. The present experiments indicate that, prior to any behavioral training, the visual stimulus elicits a small decrease in the discharge of vagal cardiac neurons. During conditioning, this stimulus evokes a progressively greater decrease in discharge that parallels the acquisition of the conditioned cardioacceleration. In contrast, nonassociative control animals show habituation of the initial decrease in discharge. These data confirm the involvement of the vagal cardiac innervation in conditioned heart rate change, indicate that the vagal innervation acts synergistically with the sympathetic to produce cardioacceleration, and suggest that a short-latency pathway mediates the conditioned response.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gold, M R -- Cohen, D H -- P01 NS 14620/NS/NINDS NIH HHS/ -- T32 HL07284/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1981 Oct 16;214(4518):345-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7280698" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Animals ; Association Learning/*physiology ; Columbidae/physiology ; Conditioning (Psychology)/physiology ; Heart/*innervation ; Heart Rate ; Learning/*physiology ; Light ; Time Factors ; Vagus Nerve/*physiology ; Visual Pathways/physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 99
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    Lateral diffusion of surface molecules in animal cells and tissues (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-08-21
    Description: When bound to cell surfaces, certain lectins such as concanavalin A induce a drop in the average diffusion coefficients (D) of a number of cell surface molecules. To find whether such anchorage modulation occurs naturally, D of surface antigens on different cell and tissue types were measured by fluorescence photobleaching recovery. Values for cells of the same tissue origin under different conditions of growth and association - in tissues, in small aggregates, and as isolated cells - varied by less than twofold when polyspecific monovalent antibodies to cell surface antigens were used, a range much less than the sixfold decrease in D observed after lectin-induced anchorage modulation. Thus, if reversible modulation of the diffusion rate is used naturally as a means of cell signaling, it must involve only a few kinds of surface receptors not detected by the antibodies used in this study. In certain tissues, however, a significant proportion of cells showed no apparent receptor mobility. This "all or none" modulation of lateral diffusion may reflect relatively long-lasting alterations in the states of a single cell type or differentiation among the cells of the particular tissue.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gall, W E -- Edelman, G M -- AI-09273/AI/NIAID NIH HHS/ -- AI-11378/AI/NIAID NIH HHS/ -- AM-04256/AM/NIADDK NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1981 Aug 21;213(4510):903-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7196087" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, Surface/physiology ; Cell Adhesion ; Cell Division ; Cells, Cultured ; Chick Embryo ; Cytoskeleton/physiology ; Diffusion ; *Membrane Fluidity ; Mice
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 100
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    Interferon action: RNA cleavage pattern of a (2'-5')oligoadenylate--dependent endonuclease (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-05-29
    Description: One of the mediators of interferon action is a latent endoribonuclease (ribonuclease L) that is activated by (2'-5')oligoadenylates. Among the homopolymers of the four common ribonucleotides, activated ribonuclease L degrades at an appreciable rate only polyuridylic acid. In two natural RNA's tested the most frequent ribonuclease L cleavages occur after UA, UG, and UU (A, adenine; U, uracil; and G, guanine) and much less frequent cleavages after CA and AC (C, cytosine).〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Floyd-Smith, G -- Slattery, E -- Lengyel, P -- AI-12320/AI/NIAID NIH HHS/ -- CA-16038/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1981 May 29;212(4498):1030-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6165080" target="_blank"〉PubMed〈/a〉
    Keywords: Adenine Nucleotides/*pharmacology ; Animals ; Carcinoma, Ehrlich Tumor/enzymology ; *Endoribonucleases ; HeLa Cells/enzymology ; Humans ; Interferons/*pharmacology ; Mice ; Oligonucleotides/*pharmacology ; Oligoribonucleotides/*pharmacology ; Rna ; Ribonucleases/*metabolism ; Ribonucleotides/analysis ; Substrate Specificity
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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