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  • Articles  (183)
  • Animals  (123)
  • Cell & Developmental Biology  (60)
  • 1980-1984  (183)
  • 1930-1934
  • 1983  (183)
Collection
  • Articles  (183)
Years
  • 1980-1984  (183)
  • 1930-1934
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  • 11
    ISSN: 0021-9541
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The possibilities that the growth-promoting effect of the extracellular matrix (ECM) produced by cultured bovine corneal endothelial (BCE) cells could be due to: (1) adsorbed cellular factors released during the cell lysis process leading to the denudation of the ECM; (2) adsorbed serum or plasma factors: or (3) adsorbed exogenous growth factors have been examined. Exposure of confluent BCE cultures to 2 M urea in medium supplemented with 0.5% calf serum denudes the ECM without cell lysis. The ECM prepared by this procedure supports cell growth just as well as ECM prepared by denudation involving cell lysis. Thus, it is unlikely that the growth-promoting properties of ECM are due to adsorbed cellular factors. When the ECM produced by BCE cells grown in defined medium supplemented with high-density lipoprotein, transferrin, and insulin was compared to the ECMs produced by cells grown in the presence of serum- or plasma-supplemented medium, all were found to be equally potent in stimulating cell growth. It is therefore unlikely that the growth-promoting ability of the ECM is due to adsorbed plasma or serum components. When fibroblast growth factor (FGF)-coated and ECM-coated plastic dishes were submitted to a heat treatment (70°C, 30 min) which results in the inactivation of FGF, the growth-supporting ability of FGF-coated dishes was lost, while the comparable ability of ECM-coated dishes was not affected significantly. This observation tends to demonstrate that the active factor present in the ECM is not FGF. Nor is it platelet derived growth factor (PDGF), since treatment known to destroy the activity of PDGF, such as exposure to dithiothreitol (0.1 M, 30 min, 22°C) or to β-mercaptoethanol (10%) in the presence or absence of 6 M urea for 30 min at 227°C, does not affect the growth-promoting activity of ECM. It is therefore unlikely that the growth-promoting effect of ECM is due to cellular growth-promoting agents or to plasma or serum factors adsorbed onto the ECM.
    Additional Material: 11 Ill.
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  • 12
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Gamete Research 8 (1983), S. 325-333 
    ISSN: 0148-7280
    Keywords: cytoplasmic droplet ; spermatozoa ; bovine ; crystalloid ; ultrastructure ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: An elongate crystalloid inclusion has been noted in the cytoplasmic droplet of cauda epididymal bovine spermatozoa. The crystalloid appears to be composed of an aggregate of parallel 10 nm diameter filamentous elements that are associated laterally with one another. It has a regular cross-banding pattern that repeats at 13-15-nm intervals. A purified fraction of detached droplets was prepared by centrifugation of sperm suspensions onto Percoll gradients. The detached droplets also exhibited the crystalline inclusion. The origin and possible functions of this structure are discussed.
    Additional Material: 7 Ill.
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  • 13
    Publication Date: 1983-09-16
    Description: The saccadic system accurately compensates for perturbations of eye position produced by microstimulation of the superior colliculus. This requires that information about the stimulation-induced change in eye position be provided by an extraretinal source--either proprioceptive endings in extraocular muscles or a centrally generated corollary discharge. It is shown that compensation remains intact after elimination of extraocular muscle proprioception, demonstrating that corollary discharge provides accurate eye position information.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Guthrie, B L -- Porter, J D -- Sparks, D L -- F32 EY05651/EY/NEI NIH HHS/ -- P30 EY03039/EY/NEI NIH HHS/ -- R01 EY01189/EY/NEI NIH HHS/ -- New York, N.Y. -- Science. 1983 Sep 16;221(4616):1193-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6612334" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Eye Movements ; Macaca mulatta ; Oculomotor Muscles/*physiology ; Photic Stimulation ; Proprioception ; *Saccades ; Superior Colliculi/*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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  • 14
    Publication Date: 1983-03-25
    Description: Microinfusions of rat prolactin into the dorsal midbrain of estrogen-treated, ovariectomized rats increased lordosis behavior. Midbrain microinfusions of antiserum to prolactin into rats displaying maximum lordosis had the opposite effect. The distribution of a prolactin-like substance in the brain was studied immunocytochemically. The results suggest that a hypothalamic neuronal system projecting to the midbrain contains a prolactin-like substance that plays a role in facilitating this behavior and therefore may mediate some of the effects of estrogen on the brain. These data, together with others from studies of the prolactin gene and its regulation, indicate that it may be possible to analyze a sequence of molecular events in the brain that facilitate a behavioral response.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Harlan, R E -- Shivers, B D -- Pfaff, D W -- HD-05585/HD/NICHD NIH HHS/ -- HD-05737/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1983 Mar 25;219(4591):1451-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6828874" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenalectomy ; Animals ; Castration ; Cerebral Cortex/drug effects/*physiology ; Cosyntropin/pharmacology ; Estradiol/pharmacology ; Female ; Growth Hormone/pharmacology ; Immune Sera ; Kinetics ; Mesencephalon/*physiology ; Oxytocin/pharmacology ; Posture ; Prolactin/administration & dosage/*pharmacology ; Rats ; Sexual Behavior, Animal/*drug effects ; Vasopressins/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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  • 15
    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
    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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  • 16
    Publication Date: 1983-07-22
    Description: Depletion of polyamines in 9L rat brain tumor cells by treatment with alpha-difluoromethylornithine dramatically altered DNA conformation as measured by viscoelastometry. The reduction of intracellular putrescine and spermidine concentrations to less than 5 percent of their concentrations in control cells decreased the sensitivity of 9L cell DNA to x-irradiation and increased the maximum viscoelastic retardation time of the DNA. Both of these phenomena were reversed by addition of exogenous putrescine.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hung, D T -- Marton, L J -- Deen, D F -- Shafer, R H -- CA-13525/CA/NCI NIH HHS/ -- CA-19658/CA/NCI NIH HHS/ -- CA-27343/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1983 Jul 22;221(4608):368-70.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6408733" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain Neoplasms/*metabolism ; DNA, Neoplasm/*metabolism ; Eflornithine ; Molecular Conformation ; Ornithine/analogs & derivatives/pharmacology ; Polyamines/*metabolism ; Putrescine/metabolism ; Rats ; Spermidine/metabolism ; Viscosity
    Print ISSN: 0036-8075
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  • 17
    Publication Date: 1983-03-11
    Description: Neurons containing the enzyme aromatic-L-amino-acid decarboxylase (AADC) but lacking either tyrosine hydroxylase or serotonin were found in the spinal cord of neonatal and adult rats by light and electron microscopic immunocytochemistry. The majority of these neurons localized to area X of Rexed contact ependyma. Thus, spinal AADC neurons have the enzymatic capacity to catalyze directly the conversion of the amino acids tyrosine, tryptophan, or phenylalanine to their respective amines tyramine, tryptamine, or phenylethylamine. These amines normally present in the central nervous system may be of potential clinical significance as endogenous psychotomimetics.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jaeger, C B -- Teitelman, G -- Joh, T H -- Albert, V R -- Park, D H -- Reis, D J -- HL-07379-04/HL/NHLBI NIH HHS/ -- HL-18974/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1983 Mar 11;219(4589):1233-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6131537" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Aromatic-L-Amino-Acid Decarboxylases/*metabolism ; Biogenic Amines/*metabolism ; Brain/*metabolism ; Neurons/enzymology ; Neurotransmitter Agents/biosynthesis ; Rats ; Spinal Cord/*metabolism
    Print ISSN: 0036-8075
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  • 18
    Publication Date: 1983-05-06
    Description: Concentrations of biogenic amine metabolites in discrete brain areas differed significantly between dogs with genetically transmitted narcolepsy and age- and breed-matched controls. Dopamine and 3,4-dihydroxyphenylacetic acid were consistently elevated in the brains of narcoleptic animals, while homovanillic acid was not. Narcoleptic animals consistently exhibited lower utilization of dopamine and higher intraneuronal degradation of dopamine but no uniform decrease in serotonin utilization. Hence neuropathology appears to be associated with genetically transmitted canine narcolepsy. The data indicate a nonglobal depression of dopamine utilization or turnover or both.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mefford, I N -- Baker, T L -- Boehme, R -- Foutz, A S -- Ciaranello, R D -- Barchas, J D -- Dement, W C -- MH 05804/MH/NIMH NIH HHS/ -- MH 23861/MH/NIMH NIH HHS/ -- NS 13211/NS/NINDS NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1983 May 6;220(4597):629-32.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6188216" target="_blank"〉PubMed〈/a〉
    Keywords: 3,4-Dihydroxyphenylacetic Acid/analysis ; Animals ; *Brain Chemistry ; *Disease Models, Animal ; Dogs ; Dopamine/analysis ; Epinephrine/analysis ; Homovanillic Acid/analysis ; Humans ; Hydroxyindoleacetic Acid/analysis ; Narcolepsy/*physiopathology ; Norepinephrine/analysis ; Serotonin/analysis ; Sleep, REM/physiology
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  • 19
    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
    Print ISSN: 0036-8075
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  • 20
    Publication Date: 1983-05-27
    Description: Schizophrenic patients with high ventricle brain ratios and cortical brain atrophy, as shown by computerized tomography, had decreased spinal fluid concentrations of homovanillic acid and dopamine-beta-hydroxylase activity. These decreased cerebral spinal fluid concentrations in patients with brain atrophy support the proposal of disturbed noradrenaline and dopamine neurotransmission in a subgroup of schizophrenic patients.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉van Kammen, D P -- Mann, L S -- Sternberg, D E -- Scheinin, M -- Ninan, P T -- Marder, S R -- van Kammen, W B -- Rieder, R O -- Linnoila, M -- New York, N.Y. -- Science. 1983 May 27;220(4600):974-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6133351" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; Adult ; Aged ; Animals ; Antipsychotic Agents/adverse effects ; Atrophy ; Brain/metabolism/*pathology ; Dopamine/metabolism ; Dopamine beta-Hydroxylase/*cerebrospinal fluid ; Homovanillic Acid/*cerebrospinal fluid ; Humans ; Middle Aged ; Phenylacetates/*cerebrospinal fluid ; Rats ; Schizophrenia/*cerebrospinal fluid ; Tomography, X-Ray Computed
    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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