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  • ASTROPHYSICS  (229)
  • GEOPHYSICS  (186)
  • Humans  (82)
  • SPACE RADIATION
  • 1985-1989  (522)
  • 1986  (522)
  • 11
    Publication Date: 1986-05-16
    Description: Two human T-cell leukemias carrying a t(8;14)(q24;q11) chromosome translocation were studied for rearrangements and expression of the c-myc oncogene. For one leukemia, rearrangement was detected in a region immediately distal (3') to the c-myc locus; no rearrangements of c-myc were observed in the second case (DeF). However, studies with hybrids between human and mouse leukemic T cells indicated that in the leukemic cells of DeF, the breakpoint in chromosome 14 occurred between genes for the variable (V alpha) and the constant (C alpha) regions for the alpha chain of the T-cell receptor. The C alpha locus had translocated to a region more than 38 kilobases 3' to the involved c-myc oncogene. Since human c-myc transcripts were expressed only in hybrids carrying the 8q+ chromosome but not in hybrids containing the normal chromosome 8, it is concluded that the translocation of the C alpha locus 3' to the c-myc oncogene can result in its transcriptional deregulation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Erikson, J -- Finger, L -- Sun, L -- ar-Rushdi, A -- Nishikura, K -- Minowada, J -- Finan, J -- Emanuel, B S -- Nowell, P C -- Croce, C M -- CA10815/CA/NCI NIH HHS/ -- CA25875/CA/NCI NIH HHS/ -- CA39860/CA/NCI NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1986 May 16;232(4752):884-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3486470" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Burkitt Lymphoma/genetics ; Chromosomes, Human, 13-15 ; Chromosomes, Human, 6-12 and X ; Humans ; Hybrid Cells ; Karyotyping ; Leukemia/*genetics ; Male ; Mice ; Middle Aged ; Nucleic Acid Hybridization ; *Oncogenes ; Receptors, Antigen, T-Cell/*genetics ; *T-Lymphocytes ; *Translocation, 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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  • 12
    Publication Date: 1986-01-24
    Description: Steady-state cellular levels of phosphatidylinositol-4,5-bisphosphate (PIP2), 1,2-diacylglycerol (DAG), and inositol phosphates have been measured in two different fibroblast cell lines (NIH 3T3 and NRK cells) before and after transformation with three different ras genes. At high cell density the ratio of DAG to PIP2 was 2.5- to 3-fold higher in the ras-transformed cells than in their untransformed counterparts. The sum of the water-soluble breakdown products of the polyphosphoinositides, inositol-1,4-bisphosphate and inositol-1,4,5-trisphosphate, was also elevated in ras-transformed NRK cells compared with nontransformed NRK cells. These findings suggest that the ras (p21) protein may act by affecting these levels, possibly as a regulatory element in the PIP2 breakdown pathway.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fleischman, L F -- Chahwala, S B -- Cantley, L -- GM 36133/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1986 Jan 24;231(4736):407-10.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3001936" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Cell Transformation, Neoplastic/*analysis ; Diglycerides/analysis ; Humans ; Inositol 1,4,5-Trisphosphate ; Inositol Phosphates/analysis ; *Oncogenes ; Phosphatidylinositol 4,5-Diphosphate ; Phosphatidylinositols/*analysis ; Rats
    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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  • 13
    Publication Date: 1986-04-25
    Description: Monocytes are a subpopulation of peripheral blood leukocytes, which when appropriately activated by the regulatory hormones of the immune system, are capable of becoming macrophages--potent effector cells for immune response to tumors and parasites. A complementary DNA for the T lymphocyte-derived lymphokine, granulocyte-macrophage colony-stimulating factor (GM-CSF), has been cloned, and recombinant GM-CSF protein has been expressed in yeast and purified to homogeneity. This purified human recombinant GM-CSF stimulated peripheral blood monocytes in vitro to become cytotoxic for the malignant melanoma cell line A375. Another T cell-derived lymphokine, gamma-interferon (IFN-gamma), also stimulated peripheral blood monocytes to become tumoricidal against this malignant cell line. When IFN-gamma activates monocytes to become tumoricidal, additional stimulation by exogenously added lipopolysaccharide is required. No such exogenous signals were required for the activation of monocytes by GM-CSF.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Grabstein, K H -- Urdal, D L -- Tushinski, R J -- Mochizuki, D Y -- Price, V L -- Cantrell, M A -- Gillis, S -- Conlon, P J -- New York, N.Y. -- Science. 1986 Apr 25;232(4749):506-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3083507" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Line ; Colony-Stimulating Factors/biosynthesis/*pharmacology ; Cytotoxicity, Immunologic/*drug effects ; Humans ; Interferon-gamma/biosynthesis/pharmacology ; Macrophages/*drug effects ; Melanoma/immunology ; Monocytes/drug effects ; Neoplasms/*immunology ; Recombinant Proteins/biosynthesis/pharmacology
    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: 1986-04-11
    Description: Early in life, abnormal visual experience may disrupt the developmental processes required for the maturation and maintenance of normal visual function. The effects of retinal image deprivation (monocular form deprivation) on four psychophysical functions were investigated in rhesus monkeys to determine if the sensitive period is of the same duration for all types of visual information processing. The basic spectral sensitivity functions of rods and cones have relatively short sensitive periods of development (3 and 6 months) when compared to more complex functions such as monocular spatial vision or resolution (25 months) and binocular vision (greater than 25 months). Therefore, there are multiple, partially overlapping sensitive periods of development and the sensitive period for each specific visual function is probably different.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Harwerth, R S -- Smith, E L 3rd -- Duncan, G C -- Crawford, M L -- von Noorden, G K -- R01 EY 01120/EY/NEI NIH HHS/ -- R01 EY 01139/EY/NEI NIH HHS/ -- R01 EY 03611/EY/NEI NIH HHS/ -- R01 EY003611/EY/NEI NIH HHS/ -- New York, N.Y. -- Science. 1986 Apr 11;232(4747):235-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3952507" target="_blank"〉PubMed〈/a〉
    Keywords: Age Factors ; Animals ; Humans ; Macaca mulatta/growth & development ; Photoreceptor Cells/growth & development ; Sensory Deprivation/physiology ; Space Perception/physiology ; Vision, Ocular/*physiology ; Visual Perception/*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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  • 15
    Publication Date: 1986-03-14
    Description: Human malignant melanoma cells express specific chondroitin sulfate proteoglycans (mel-CSPG) on the surface, both in vivo and in vitro. Melanocytes in normal skin show no detectable mel-CSPG but can be induced to express the antigen when cultured in the presence of cholera toxin and the tumor promoter 12-O-tetradecanoylphorbol-13-acetate. Most other cell types do not express mel-CSPG either in vivo or in vitro. A study was designed to examine regulatory signals controlling mel-CSPG expression. The gene encoding mel-CSPG was mapped to human chromosome 15, and this chromosome was introduced into rodent cells derived from distinct differentiation lineages. Three types of mel-CSPG--expressing hybrids were found: (i) hybrids derived from human melanomas; (ii) hybrids derived from human cells that do not express mel-CSPG; and (iii) hybrids derived from human cells expressing mel-CSPG that are antigen-negative but that are induced to express mel-CSPG when cultured on extracellular matrix instead of plastic surfaces. Thus, mel-CSPG expression can be controlled both through intrinsic signals, provided by the differentiation program of the rodent fusion partner, and through extrinsic signals, provided by specific cell-matrix interactions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rettig, W J -- Real, F X -- Spengler, B A -- Biedler, J L -- Old, L J -- CA-08748/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1986 Mar 14;231(4743):1281-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3633135" target="_blank"〉PubMed〈/a〉
    Keywords: Aggrecans ; Animals ; Antibodies, Monoclonal ; Cell Line ; Cholera Toxin/pharmacology ; Chromosome Mapping ; Chromosomes, Human, 13-15 ; Cricetinae ; Cricetulus ; *Extracellular Matrix Proteins ; Gene Expression Regulation/drug effects ; Glycoproteins/*biosynthesis/genetics ; Humans ; Hybrid Cells/drug effects/*metabolism ; Lectins, C-Type ; Lymphocytes/metabolism ; Melanocytes/drug effects/metabolism ; Melanoma/*metabolism ; Mice ; Neoplasm Proteins/*biosynthesis/genetics ; Neuroblastoma/metabolism ; *Proteoglycans ; Rats ; Tetradecanoylphorbol Acetate/pharmacology
    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: 1986-01-24
    Description: Parathyroid hormone-like factors have been found in extracts of tumors associated with humoral hypercalcemia of malignancy, many of which are of squamous epithelial origin. Cultured, nonmalignant human keratinocytes were examined for the production of similar factors. Keratinocyte-conditioned medium from ten cultures stimulated the production of cyclic adenosine monophosphate in clonally derived rat osteosarcoma cells sensitive to parathyroid hormone. Bovine [Nle8,18, Tyr34]PTH-(3-34)NH2, a competitive inhibitor of parathyroid hormone, stopped the adenylate cyclase production stimulated by keratinocyte-conditioned medium, but antisera to parathyroid hormone had no effect on such adenylate cyclase activity. The active component of keratinocyte-conditioned medium has a molecular weight exceeding that of native parathyroid hormone. These characteristics are shared by the parathyroid hormone receptor agonists associated with humoral hypercalcemia of malignancy, which suggests that normal human keratinocytes may produce a factor related to that produced by malignant tumors associated with humoral hypercalcemia of malignancy.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Merendino, J J Jr -- Insogna, K L -- Milstone, L M -- Broadus, A E -- Stewart, A F -- AM 30102/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1986 Jan 24;231(4736):388-90.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2417317" target="_blank"〉PubMed〈/a〉
    Keywords: Adenylyl Cyclases/metabolism ; Animals ; Cattle ; Cells, Cultured ; Cyclic AMP/metabolism ; Epidermis/*cytology/metabolism/physiology ; Humans ; Isoproterenol/pharmacology ; Keratins/*metabolism ; Mice ; Osteosarcoma/metabolism ; Parathyroid Hormone/pharmacology/*physiology ; Peptide Fragments/pharmacology ; Rats ; Teriparatide
    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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  • 17
    Publication Date: 1986-12-19
    Description: In postmortem studies of patients with schizophrenia, D2 dopamine receptors in the basal ganglia have been observed to be more numerous than in patients with no history of neurological or psychiatric disease. Because most patients with schizophrenia are treated with neuroleptic drugs that block D2 dopamine receptors in the caudate nucleus, it has been suggested that this increase in the number of receptors is a result of adaptation to these drugs rather than a biochemical abnormality intrinsic to schizophrenia. With positron emission tomography (PET), the D2 dopamine receptor density in the caudate nucleus of living human beings was measured in normal volunteers and in two groups of patients with schizophrenia--one group that had never been treated with neuroleptics and another group that had been treated with these drugs. D2 dopamine receptor densities in the caudate nucleus were higher in both groups of patients than in the normal volunteers. Thus, schizophrenia itself is associated with an increase in brain D2 dopamine receptor density.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wong, D F -- Wagner, H N Jr -- Tune, L E -- Dannals, R F -- Pearlson, G D -- Links, J M -- Tamminga, C A -- Broussolle, E P -- Ravert, H T -- Wilson, A A -- Toung, J K -- Malat, J -- Williams, J A -- O'Tuama, L A -- Snyder, S H -- Kuhar, M J -- Gjedde, A -- 1RO1 53146/PHS HHS/ -- NS15080/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1986 Dec 19;234(4783):1558-63.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2878495" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Antipsychotic Agents/*therapeutic use ; Caudate Nucleus/*metabolism ; Haloperidol/therapeutic use ; Humans ; Kinetics ; Receptors, Dopamine/*metabolism ; Receptors, Dopamine D2 ; Schizophrenia/drug therapy/*metabolism ; Spiperone/analogs & derivatives/metabolism ; Tomography, Emission-Computed
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    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 18
    Publication Date: 1986-08-15
    Description: To define the functional domains of the progesterone receptor required for gene regulation, complementary DNA (cDNA) clones encoding the chicken progesterone receptor have been isolated from a chicken oviduct lambda gt11 cDNA expression library. Positive clones expressed antigenic determinants that cross-reacted with six monospecific antibodies derived from two independent sources. A 36-amino acid peptide sequence obtained by microsequencing of purified progesterone receptor was encoded by nucleotide sequences in the longest cDNA clone. Analysis of the amino acid sequence of the progesterone receptor deduced from the cDNA clones revealed a cysteine-rich region that was homologous to a region found in the estrogen and glucocorticoid receptors and to the avian erythroblastosis virus gag-erb-A fusion protein. Northern blot analysis with chicken progesterone receptor cDNA's indicated the existence of at least three messenger RNA species. These messages were found only in oviduct and could be induced by estrogens.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Conneely, O M -- Sullivan, W P -- Toft, D O -- Birnbaumer, M -- Cook, R G -- Maxwell, B L -- Zarucki-Schulz, T -- Greene, G L -- Schrader, W T -- O'Malley, B W -- New York, N.Y. -- Science. 1986 Aug 15;233(4765):767-70.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2426779" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Antibodies, Monoclonal ; Base Sequence ; Chickens ; *Cloning, Molecular ; Cross Reactions ; DNA/*metabolism ; Epitopes/analysis ; Female ; *Genes ; Humans ; Nucleic Acid Hybridization ; Oviducts/metabolism ; RNA, Messenger/genetics ; Receptors, Progesterone/*genetics ; Species Specificity
    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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  • 19
    Publication Date: 1986-08-08
    Description: A variant of human T-lymphotropic virus type III (HTLV-III) is described that replicates but does not kill normal human T cells in vitro. This variant, designated X10-1, was derived from the genome of a cytopathic HTLV-III clone (pHXB2D) by excision of a 200-base pair segment in the 3' region of the virus, spanning the env and 3'-orf genes. Comparable variants with 55 to 109 base pairs deleted exclusively in 3'-orf produced, in contrast, virus that was extremely cytopathic. On the basis of these findings it is concluded that the 3'-orf gene is not required for cytopathogenicity or replication of HTLV-III. In addition, the results suggest that virus replication and cytotoxicity are not intrinsically coupled. Furthermore, since clone X10-1 retains the ability to trans-activate genes linked to the viral long terminal repeats, trans-activation per se is not responsible for T-cell killing by HTLV-III. These results also raise the possibility that the carboxyl terminus of the envelope gene of HTLV-III has a direct role in T-cell killing by this virus.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fisher, A G -- Ratner, L -- Mitsuya, H -- Marselle, L M -- Harper, M E -- Broder, S -- Gallo, R C -- Wong-Staal, F -- New York, N.Y. -- Science. 1986 Aug 8;233(4764):655-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3014663" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/*microbiology ; Cloning, Molecular ; Deltaretrovirus/*genetics/pathogenicity ; Humans ; Mutation ; Nucleic Acid Hybridization ; RNA, Viral/genetics ; T-Lymphocytes/microbiology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 20
    Publication Date: 1986-11-21
    Description: The chromosomal breakpoint involved in the t(8;14)(q24;q11) chromosome translocation in the SKW-3 cell line, which directly involves the 3' flanking region of the c-myc gene, was cloned and sequenced. The breakpoint on chromosome 8 mapped to a position 3 kb 3' of c-myc while the chromosome 14 breakpoint occurred 36 kb 5' of the gene for the constant region of the alpha chain of the T-cell receptor (TCR). The translocation resulted in a precise rearrangement of sequences on chromosome 8 and what appears to be a functional J alpha segment on chromosome 14. Signal sequences for V-J joining occurred at the breakpoint positions on both chromosomes 14 and 8, suggesting that the translocation occurs during TCR gene rearrangement and that it is catalyzed by the enzymatic systems involved in V-J joining reactions. The involvement of c-myc in the translocation and the association of joining signals at the breakpoints provides a parallel to the situation observed in the translocations involving c-myc and the immunoglobulin loci in B-cell neoplasms and suggests that common mechanisms of translocation and oncogene deregulation are involved in B- and T-cell malignancies.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Finger, L R -- Harvey, R C -- Moore, R C -- Showe, L C -- Croce, C M -- CA 09485/CA/NCI NIH HHS/ -- CA 39860/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1986 Nov 21;234(4779):982-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3490692" target="_blank"〉PubMed〈/a〉
    Keywords: *B-Lymphocytes ; Base Sequence ; Cell Line ; Chromosomes, Human, 13-15 ; Chromosomes, Human, 6-12 and X ; Humans ; Leukemia/*genetics ; Nucleic Acid Hybridization ; Proto-Oncogenes ; Receptors, Antigen, T-Cell/genetics ; *T-Lymphocytes ; *Translocation, Genetic
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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