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  • Articles  (407)
  • Life and Medical Sciences  (157)
  • Animals  (107)
  • Humans  (101)
  • Chemical Engineering  (75)
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  • Lunar and Planetary Science and Exploration
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  • 1990-1994  (407)
  • 1965-1969
  • 1992  (407)
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  • Articles  (407)
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  • 1990-1994  (407)
  • 1965-1969
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  • 1
    Publication Date: 1992-11-20
    Description: Heterosexual transmission through the cervico-vaginal mucosa is the principal route of human immunodeficiency virus (HIV) infection in Africa and is increasing in the United States and Europe. Vaginal immunization with simian immunodeficiency virus (SIV) had not yet been studied in nonhuman primates. Immune responses in macaques were investigated by stimulation of the genital and gut-associated lymphoid tissue with a recombinant, particulate SIV antigen. Vaginal, followed by oral, administration of the vaccine elicited three types of immunity: (i) gag protein p27-specific, secretory immunoglobulin A (IgA) and immunoglobulin G (IgG) in the vaginal fluid, (ii) specific CD4+ T cell proliferation and helper function in B cell p27-specific IgA synthesis in the genital lymph nodes, and (iii) specific serum IgA and IgG, with CD4+ T cell proliferative and helper functions in the circulating blood.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lehner, T -- Bergmeier, L A -- Panagiotidi, C -- Tao, L -- Brookes, R -- Klavinskis, L S -- Walker, P -- Walker, J -- Ward, R G -- Hussain, L -- New York, N.Y. -- Science. 1992 Nov 20;258(5086):1365-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Immunology, United Medical School, Guy's Hospital, London, United Kingdom.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1360702" target="_blank"〉PubMed〈/a〉
    Keywords: Administration, Oral ; Animals ; Antibodies, Viral/analysis ; CD4-Positive T-Lymphocytes/immunology ; Female ; Gene Products, gag/*immunology ; Immunity ; Immunoglobulin A/immunology ; Immunoglobulin G/immunology ; Macaca mulatta ; Mucous Membrane/immunology ; Recombinant Proteins/immunology ; Saliva/immunology ; Simian Acquired Immunodeficiency Syndrome/*immunology ; Simian Immunodeficiency Virus/*immunology ; T-Lymphocytes, Helper-Inducer/immunology ; Vaccines, Synthetic/administration & dosage/*immunology ; Vagina/immunology
    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
    ISSN: 1040-452X
    Keywords: Embryonic stem cells ; Cell differentiation ; Pluripotency ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: Ten embryonic stem (ES) cell lines from mink blastocysts were isolated and characterized. All the lines had a normal diploid karyotype; of the ten lines studied, five had the XX and five had the XY constitution. Testing of the pluripotency of the ES-like cells demonstrated that (1) among four lines of genotype XX, an X was late-replicating in three; both Xs were active in about one-third of cells of line MES8, and analysis of glucose-6-phosphate dehydrogenase revealed no dosage compensation for the X-linked gene; (2) when cultured in suspension, the majority of lines were capable of forming “simple” embryoid bodies (EB), and two only showed the capacity for forming “cystic” multilayer EBs. However, formation of ectoderm or foci of yolk sac hematopoiesis, a feature of mouse ES ceils, was not observed in the “cystic” EB; (3) when cultured as a monolayer without feeder, the ES cells differentiated into either vimentin-positive fibroblast-like cells or cytokeratin-positive epithelial-like cells (less frequently); neural cells appeared in two lines; (4) when injected into athymic mice, only one of the four tested lines gave rise to tumors. These were fibrosarcomas composed of fibrobalst-like cells, with an admixture of smooth muscular elements and stray islets of epithelial tissue; (5) when the ES cells of line MES1 were injected into 102 blastocyst cavities and subsequently transplanted into foster mathers, we obtained 30 offspring. Analysis of the biochemical markers and coat color did not demonstrate the presence of chimaeras among offspring. Thus the cell lines derived from mink blastocysts are true ES cells. However, their pluripotential capacities are restricted. © 1992 Wiley-Liss, Inc.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Publication Date: 1992-07-06
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wicker, L S -- Podolin, P L -- Fischer, P -- Sirotina, A -- Boltz, R C Jr -- Peterson, L B -- New York, N.Y. -- Science. 1992 Jun 26;256(5065):1828-30; author reply 1830-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1319611" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD27 ; Antigens, Differentiation, T-Lymphocyte/*biosynthesis ; B-Lymphocytes/immunology ; Blotting, Northern ; Diabetes Mellitus, Type 1/*immunology ; Disease Models, Animal ; Flow Cytometry ; H-2 Antigens/*biosynthesis ; Mice ; Mice, Inbred BALB C ; Mice, Inbred NOD ; T-Lymphocytes/immunology
    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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  • 4
    Publication Date: 1992-02-28
    Description: Multiple human immunodeficiency virus type-1 sequences from the V3 and V4-V5 regions of the envelope gene were analyzed from three mother-infant pairs. The infants' viral sequences were less diverse than those of their mothers. In two pairs, a proviral form infrequently found in the mother predominated in her infant. A conserved N-linked glycosylation site within the V3 region, present in each mother's sequence set, was absent in all of the infants' sequence sets. These findings demonstrate that a minor subset of maternal virus is transmitted to the infant.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wolinsky, S M -- Wike, C M -- Korber, B T -- Hutto, C -- Parks, W P -- Rosenblum, L L -- Kunstman, K J -- Furtado, M R -- Munoz, J L -- AI-32535/AI/NIAID NIH HHS/ -- HD26619-01/HD/NICHD NIH HHS/ -- P01-25569/PHS HHS/ -- New York, N.Y. -- Science. 1992 Feb 28;255(5048):1134-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, Northwestern University Medical School, Chicago, IL 60611.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1546316" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/congenital/microbiology/*transmission ; Amino Acid Sequence ; Base Sequence ; Female ; Genotype ; Glycosylation ; HIV Antigens/genetics ; HIV Envelope Protein gp120/genetics/immunology ; HIV-1/*genetics/immunology ; Humans ; Infant ; Maternal-Fetal Exchange ; Molecular Sequence Data ; Oligodeoxyribonucleotides/chemistry ; Polymerase Chain Reaction ; Pregnancy ; Selection, Genetic ; Sequence Alignment
    Print ISSN: 0036-8075
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  • 5
    Publication Date: 1992-12-11
    Description: Angiogenic factors produced by monocytes-macrophages are involved in the pathogenesis of chronic inflammatory disorders characterized by persistent angiogenesis. The possibility was tested that interleukin-8 (IL-8), which is a cytokine that is chemotactic for lymphocytes and neutrophils, is also angiogenic. Human recombinant IL-8 was potently angiogenic when implanted in the rat cornea and induced proliferation and chemotaxis of human umbilical vein endothelial cells. Angiogenic activity present in the conditioned media of inflamed human rheumatoid synovial tissue macrophages or lipopolysaccharide-stimulated blood monocytes was equally blocked by antibodies to either IL-8 or tumor necrosis factor-alpha. An IL-8 antisense oligonucleotide specifically blocked the production of monocyte-induced angiogenic activity. These data suggest a function for macrophage-derived IL-8 in angiogenesis-dependent disorders such as rheumatoid arthritis, tumor growth, and wound repair.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Koch, A E -- Polverini, P J -- Kunkel, S L -- Harlow, L A -- DiPietro, L A -- Elner, V M -- Elner, S G -- Strieter, R M -- AR30692/AR/NIAMS NIH HHS/ -- AR41492/AR/NIAMS NIH HHS/ -- HL39926/HL/NHLBI NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1992 Dec 11;258(5089):1798-801.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, Northwestern University Medical School, Chicago, IL 60611.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1281554" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arthritis, Rheumatoid/physiopathology ; Base Sequence ; Cell Division/drug effects ; Cells, Cultured ; Chemotaxis/*drug effects ; Cornea/*drug effects/physiology ; Dose-Response Relationship, Drug ; Endothelium, Vascular/drug effects/*physiology ; Fibroblast Growth Factor 2/pharmacology ; Humans ; Interleukin-8/genetics/*pharmacology ; Macrophages/*physiology ; Mice ; Molecular Sequence Data ; Monocytes/physiology ; *Neovascularization, Pathologic ; Oligonucleotides, Antisense/*pharmacology ; Rabbits ; Rats ; Recombinant Proteins/pharmacology ; Synovial Fluid/physiology ; Tumor Necrosis Factor-alpha/genetics ; Umbilical Veins
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 6
    Publication Date: 1992-03-13
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jucker, M -- Walker, L C -- Martin, L J -- Kitt, C A -- Kleinman, H K -- Ingram, D K -- Price, D L -- New York, N.Y. -- Science. 1992 Mar 13;255(5050):1443-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1542796" target="_blank"〉PubMed〈/a〉
    Keywords: Aging/*metabolism ; Amyloid beta-Peptides/*metabolism ; Animals ; Brain/*metabolism ; Female ; Male ; Mice ; Mice, Inbred C57BL ; Mice, Transgenic/*metabolism
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  • 7
    Publication Date: 1992-05-08
    Description: Voltage-sensitive sodium channels are responsible for the initiation and propagation of the action potential and therefore are important for neuronal excitability. Complementary DNA clones encoding the beta 1 subunit of the rat brain sodium channel were isolated by a combination of polymerase chain reaction and library screening techniques. The deduced primary structure indicates that the beta 1 subunit is a 22,851-dalton protein that contains a single putative transmembrane domain and four potential extracellular N-linked glycosylation sites, consistent with biochemical data. Northern blot analysis reveals a 1,400-nucleotide messenger RNA in rat brain, heart, skeletal muscle, and spinal cord. Coexpression of beta 1 subunits with alpha subunits increases the size of the peak sodium current, accelerates its inactivation, and shifts the voltage dependence of inactivation to more negative membrane potentials. These results indicate that the beta 1 subunit is crucial in the assembly, expression, and functional modulation of the heterotrimeric complex of the rat brain sodium channel.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Isom, L L -- De Jongh, K S -- Patton, D E -- Reber, B F -- Offord, J -- Charbonneau, H -- Walsh, K -- Goldin, A L -- Catterall, W A -- NS15751/NS/NINDS NIH HHS/ -- NS25704/NS/NINDS NIH HHS/ -- NS26729/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1992 May 8;256(5058):839-42.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pharmacology, University of Washington, Seattle 98195.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1375395" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Blotting, Northern ; Brain/*physiology ; Cloning, Molecular ; DNA/genetics/isolation & purification ; Female ; Kinetics ; Macromolecular Substances ; Membrane Potentials ; Molecular Sequence Data ; Oocytes/physiology ; Polymerase Chain Reaction/methods ; Protein Conformation ; RNA/genetics/isolation & purification ; RNA, Messenger/genetics ; Rats ; Sodium Channels/*genetics/*physiology ; Voltage-Gated Sodium Channel beta-1 Subunit ; Xenopus
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  • 8
    Publication Date: 1992-12-28
    Description: Cellular proteins associated with immunodeficiency viruses were identified by determination of the amino acid sequence of the proteins and peptides present in sucrose density gradient-purified human immunodeficiency virus (HIV)-1, HIV-2, and simian immunodeficiency virus (SIV). beta 2 microglobulin (beta 2m) and the alpha and beta chains of human lymphocyte antigen (HLA) DR were present in virus preparations at one-fifth the concentration of Gag on a molar basis. Antisera to HLA DR, beta 2 m, as well as HLA class I precipitated intact viral particles, suggesting that these cellular proteins were physically associated with the surface of the virus. Antisera to class I, beta 2m, and HLA DR also inhibited infection of cultured cells by both HIV-1 and SIV. The specific, selective association of these cellular proteins in a physiologically relevant manner has major implications for our understanding of the infection process and the pathogenesis of immunodeficiency viruses and should be considered in the design of vaccines.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Arthur, L O -- Bess, J W Jr -- Sowder, R C 2nd -- Benveniste, R E -- Mann, D L -- Chermann, J C -- Henderson, L E -- N01-CO-74102/CO/NCI NIH HHS/ -- New York, N.Y. -- Science. 1992 Dec 18;258(5090):1935-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉AIDS Vaccine Program, National Cancer Institute, Frederick Cancer Research and Development Center NCI-FCRDC, MD 21702.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1470916" target="_blank"〉PubMed〈/a〉
    Keywords: *AIDS Vaccines ; Centrifugation, Density Gradient ; Chromatography, High Pressure Liquid ; Gene Products, gag/analysis ; HIV-1/*immunology/isolation & purification/physiology ; HIV-2/*immunology/isolation & purification/physiology ; HLA-DR Antigens/isolation & purification/*metabolism ; Humans ; Immune Sera ; Lymphocytes/*immunology ; Neutralization Tests ; Simian Immunodeficiency Virus/*immunology/isolation & purification/physiology ; beta 2-Microglobulin/isolation & purification/*metabolism
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  • 9
    Publication Date: 1992-06-05
    Description: The phagocyte respiratory burst oxidase is a flavin-adenine dinucleotide (FAD)-dependent dehydrogenase and an electron transferase that reduces molecular oxygen to superoxide anion, a precursor of microbicidal oxidants. Several proteins required for assembly of the oxidase have been characterized, but the identity of its flavin-binding component has been unclear. Oxidase activity was reconstituted in vitro with only the purified oxidase proteins p47phox, p67phox, Rac-related guanine nucleotide (GTP)-binding proteins, and membrane-bound cytochrome b558. The reconstituted oxidase required added FAD, and FAD binding was localized to cytochrome b558. Alignment of the amino acid sequence of the beta subunit of cytochrome b558 (gp91phox) with other flavoproteins revealed similarities to the nicotinamide adenine dinucleotide phosphate (reduced) (NADPH)-binding domains. Thus flavocytochrome b558 is the only obligate electron transporting component of the NADPH oxidase.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rotrosen, D -- Yeung, C L -- Leto, T L -- Malech, H L -- Kwong, C H -- New York, N.Y. -- Science. 1992 Jun 5;256(5062):1459-62.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Host Defenses, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1318579" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Binding Sites ; Cell Line ; Cell-Free System ; Cytochrome b Group/*blood/genetics/isolation & purification ; Ferredoxin-NADP Reductase/genetics/metabolism ; Humans ; Insects ; Molecular Sequence Data ; NADH, NADPH Oxidoreductases/*blood/genetics/isolation & purification ; NADP/metabolism ; NADPH Oxidase ; Neutrophils/*enzymology ; Phagocytes/*enzymology ; Plants/enzymology ; Recombinant Proteins/chemistry/metabolism ; Sequence Homology, Nucleic Acid ; Superoxides/blood ; Transfection
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  • 10
    Publication Date: 1992-10-23
    Description: Linkage analysis was used to search the genome for chromosomal regions harboring familial Alzheimer's disease genes. Markers on chromosome 14 gave highly significant positive lod scores in early-onset non-Volga German kindreds; a Zmax of 9.15 (theta = 0.01) was obtained with the marker D14S43 at 14q24.3. One early-onset family yielded a lod score of 4.89 (theta = 0.0). When no assumptions were made about age-dependent penetrance, significant results were still obtained (Zmax = 5.94, theta = 0.0), despite the loss of power to detect linkage under these conditions. Results for the Volga German families were either negative or nonsignificant for markers in this region. Thus, evidence indicates a familial Alzheimer's disease locus on chromosome 14.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schellenberg, G D -- Bird, T D -- Wijsman, E M -- Orr, H T -- Anderson, L -- Nemens, E -- White, J A -- Bonnycastle, L -- Weber, J L -- Alonso, M E -- AG08017/AG/NIA NIH HHS/ -- HG00248/HG/NHGRI NIH HHS/ -- R01MH43240/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1992 Oct 23;258(5082):668-71.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1411576" target="_blank"〉PubMed〈/a〉
    Keywords: Alzheimer Disease/*genetics ; Base Sequence ; *Chromosomes, Human, Pair 14 ; Female ; Genetic Linkage/*genetics ; Humans ; Male ; Molecular Sequence Data ; Oligonucleotide Probes/genetics ; Pedigree
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