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  • 1
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    Diazepam inhibits myoblast fusion and expression of muscle specific protein synthesis (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-05-05
    Description: The presence of diazepam in culutres of chicken embryo myoblasts arrests normal muscle cell differentiation. High concentrations of the drug reversibly prevent myoblasts from fusing to form multinucleated myotubes. Lower concentrations of diazepam allow cell fusion to occur, but inhibit the synthesis and accumulation of myosin heavy chain, implying that cell fusion does not obligate myoblasts to synthesize and accumulate large quantities of muscle specific protein. The effect of diazepam on muscle cells in culture is direct and specific.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bandman, E -- Walker, C R -- Strohman, R C -- New York, N.Y. -- Science. 1978 May 5;200(4341):559-61.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/565534" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Differentiation/drug effects ; Cell Fusion/drug effects ; Cells, Cultured ; Chick Embryo ; Diazepam/*pharmacology ; Dose-Response Relationship, Drug ; Macromolecular Substances ; Muscles/cytology/*drug effects ; Myosins/*biosynthesis
    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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    Grafting genetically modified cells to the damaged brain: restorative effects of NGF expression (1988)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1988-12-16
    Description: Fibroblasts were genetically modified to secrete nerve growth factor (NGF) by infection with a retroviral vector and then implanted into the brains of rats that had surgical lesions of the fimbria-fornix. The grafted cells survived and produced sufficient NGF to prevent the degeneration of cholinergic neurons that would die without treatment. In addition, the protected cholinergic cells sprouted axons that projected in the direction of the cellular source of NGF. These results indicate that a combination of gene transfer and intracerebral grafting may provide an effective treatment for some disorders of the central nervous system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rosenberg, M B -- Friedmann, T -- Robertson, R C -- Tuszynski, M -- Wolff, J A -- Breakefield, X O -- Gage, F H -- AG06088/AG/NIA NIH HHS/ -- HD20034/HD/NICHD NIH HHS/ -- NS24279/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1988 Dec 16;242(4885):1575-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pediatrics, University of California School of Medicine, La Jolla 92093.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3201248" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylcholinesterase/metabolism ; Animals ; Brain/cytology/enzymology/*pathology ; Cell Survival ; DNA/genetics ; Fibroblasts/metabolism/*transplantation ; Genetic Vectors ; Histocytochemistry ; Moloney murine leukemia virus/genetics ; Nerve Growth Factors/genetics/*physiology ; 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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  • 3
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    Repression of the IgH enhancer in teratocarcinoma cells associated with a novel octamer factor (1989)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1989-01-27
    Description: Embryonal carcinoma (EC) cell lines are models for early cells in mouse embryogenesis. A 300-base pair fragment of the heavy chain enhancer was inactive in F9 EC cells, unlike in other nonlymphoid cells where it has significant activity. Alterations of the octamer motif increased enhancer activity. Nuclear extracts from F9 cells contained an octamer binding protein (NF-A3) that was unique to EC cells; the amount of NF-A3 decreased upon differentiation. It is proposed that NF-A3 represses specific regulatory sequences that contain the octamer motif. Thus, the same DNA sequence mediates either negative or positive transcriptional effects, depending on the cell type.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lenardo, M J -- Staudt, L -- Robbins, P -- Kuang, A -- Mulligan, R C -- Baltimore, D -- CA 01074/CA/NCI NIH HHS/ -- HD0063/HD/NICHD NIH HHS/ -- HL37569/HL/NHLBI NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1989 Jan 27;243(4890):544-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Whitehead Institute for Biomedical Research, Cambridge, MA 02142.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2536195" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bucladesine/pharmacology ; Cell Differentiation ; DNA/metabolism ; Embryonal Carcinoma Stem Cells ; *Enhancer Elements, Genetic ; Immunoglobulin Heavy Chains/*genetics ; Macromolecular Substances ; Mice ; Mutation ; Neoplastic Stem Cells/*metabolism ; RNA, Messenger/biosynthesis ; Regulatory Sequences, Nucleic Acid ; Repressor Proteins/genetics ; Transcription, Genetic ; Transfection ; Tretinoin/pharmacology ; Tumor Cells, Cultured
    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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  • 4
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    Fitness differences among remnant populations of the endangered sonoran topminnow (1989)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1989-09-01
    Description: Four correlates of fitness were measured in three stocks of the endangered Sonoran topminnow, Poeciliopsis occidentalis, from Arizona. Survival, growth, early fecundity, and developmental stability were greatest in laboratory-reared fish from the most heterozygous natural population studied. Conversely, all four traits were poorest in fish from a population with no electrophoretically detectable genetic variation. These results emphasize the need for genetic as well as demographic information for the development of comprehensive species recovery programs.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Quattro, J M -- Vrijenhoek, R C -- New York, N.Y. -- Science. 1989 Sep 1;245(4921):976-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Theoretical and Applied Genetics, Cook College, Rutgers University, New Brunswick, NJ 08903.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2772650" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arizona ; *Biological Evolution ; Cyprinodontiformes/*genetics ; Female ; Fertility ; Genetic Variation ; Male ; Poecilia/anatomy & histology/*genetics ; Species Specificity
    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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  • 5
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    A formalin-inactivated whole SIV vaccine confers protection in macaques (1989)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1989-12-08
    Description: A vaccine against human immunodeficiency virus (HIV) would be highly effective in stopping the acquired immunodeficiency syndrome (AIDS) epidemic. A comprehensive evaluation of potential vaccine methodologies can be made by means of the simian model for AIDS, which takes advantage of the similarities in viral composition and disease potential between simian immunodeficiency virus (SIV) infection of rhesus macaques and HIV infection in humans. Immunization with a formalin-inactivated whole SIV vaccine potentiated with either alum and the Syntex adjuvant threonyl muramyl dipeptide (MDP) or MDP alone resulted in the protection of eight of nine rhesus monkeys challenged with ten animal-infectious doses of pathogenic virus. These results demonstrate that a whole virus vaccine is highly effective in inducing immune responses that can protect against lentivirus infection and AIDS-like disease.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Murphey-Corb, M -- Martin, L N -- Davison-Fairburn, B -- Montelaro, R C -- Miller, M -- West, M -- Ohkawa, S -- Baskin, G B -- Zhang, J Y -- Putney, S D -- New York, N.Y. -- Science. 1989 Dec 8;246(4935):1293-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Delta Regional Primate Research Center, Tulane University, Covington, LA 70434.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2555923" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylmuramyl-Alanyl-Isoglutamine/immunology ; Adjuvants, Immunologic/administration & dosage ; Alum Compounds/administration & dosage ; Animals ; Antibodies, Viral/biosynthesis ; Chromatography, High Pressure Liquid ; Disease Models, Animal ; Formaldehyde ; Immunization, Secondary ; Leukocyte Count ; Lymphocytes/immunology/microbiology ; Macaca mulatta ; Retroviridae Infections/*prevention & control ; Retroviridae Proteins/immunology ; Simian Immunodeficiency Virus/*immunology/isolation & purification ; Vaccines, Inactivated/administration & dosage/immunology ; Viral Vaccines/administration & dosage/*immunology ; Virion/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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  • 6
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    Implantation of vascular grafts lined with genetically modified endothelial cells (1989)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1989-06-16
    Description: The possibility of using the vascular endothelial cell as a target for gene replacement therapy was explored. Recombinant retroviruses were used to transduce the lacZ gene into endothelial cells harvested from mongrel dogs. Prosthetic vascular grafts seeded with the genetically modified cells were implanted as carotid interposition grafts into the dogs from which the original cells were harvested. Analysis of the graft 5 weeks after implantation revealed genetically modified endothelial cells lining the luminal surface of the graft. This technology could be used in the treatment of atherosclerosis disease and the design of new drug delivery systems.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wilson, J M -- Birinyi, L K -- Salomon, R N -- Libby, P -- Callow, A D -- Mulligan, R C -- New York, N.Y. -- Science. 1989 Jun 16;244(4910):1344-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Whitehead Institute, Cambridge, MA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2734614" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Blood Vessel Prosthesis ; Carotid Arteries/surgery ; Cells, Cultured ; Dogs ; Endothelium, Vascular/*cytology/physiology/transplantation ; Genetic Vectors ; Retroviridae/genetics ; *Transfection
    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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  • 7
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    Unusual pattern of accumulation of mRNA encoding EGF-related protein in sea urchin embryos (1989)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1989-11-10
    Description: A sea urchin (Strongylocentrotus purpuratus) messenger RNA encoding a protein (SpEGF2) related to epidermal growth factor (EGF) was identified. The full-length complementary DNA sequence predicts a protein with an unusually simple structure, including four tandem EGF-like repeats and a hydrophobic leader, but lacking a potential transmembrane domain. Sequence similarities suggest that the peptides are homologous to two peptides from a different sea urchin species, which cause a classic developmental defect, exogastrulation, when added to the seawater outside of embryos. The SpEGF2 messenger RNA begins to accumulate at blastula stage, and in pluteus larvae it is distributed in discrete regions of ectoderm that are not congruent with known histological borders. One region corresponds to that expressing the homeodomain-containing protein, SpHbox1. The structure of the SpEGF2 protein and the pattern of accumulation of its messenger RNA suggest that it may have important functions as a secreted factor during development of sea urchin embryos.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yang, Q -- Angerer, L M -- Angerer, R C -- GM25553/GM/NIGMS NIH HHS/ -- HD602/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1989 Nov 10;246(4931):806-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, University of Rochester, NY 14627.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2814501" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Codon/genetics ; DNA/*genetics ; Epidermal Growth Factor/*genetics/physiology ; Molecular Sequence Data ; Nucleic Acid Hybridization ; RNA, Messenger/*biosynthesis ; Repetitive Sequences, Nucleic Acid ; Sea Urchins/embryology/*genetics
    Print ISSN: 0036-8075
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  • 8
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    Fibroblast growth factor in the extracellular matrix of dystrophic (mdx) mouse muscle (1989)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1989-05-12
    Description: Polyclonal antibody F547 reacts with a bovine basic fibroblast growth factor (bFGF) and a human recombinant bFGF, but not with bovine acidic fibroblast growth factor. This antibody localized bFGF in the extracellular matrix of mouse skeletal muscle, primarily in the fiber endomysium, which includes the heparin-containing basal lamina. In mdx mouse muscle, which displays persistent regeneration, FGF levels in the extracellular matrix are higher than those in controls. Overabundance of matrix FGF in mdx muscles may be related to an increase in both satellite cell and regenerative activity in the dystrophic muscle and may help explain the benign phenotype of mdx animals compared with the genetically identical human Duchenne muscular dystrophy.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉DiMario, J -- Buffinger, N -- Yamada, S -- Strohman, R C -- R01 AG02832/AG/NIA NIH HHS/ -- New York, N.Y. -- Science. 1989 May 12;244(4905):688-90.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Zoology, University of California, Berkeley 94720.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2717945" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Extracellular Matrix/*metabolism ; Fibroblast Growth Factors/*metabolism ; Heparin/metabolism ; Immunoblotting ; Mice ; Muscles/*physiopathology ; Muscular Dystrophy, Animal/genetics/*physiopathology ; Phenotype ; Regeneration ; Tissue Distribution
    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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  • 9
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    A gene for dihydrofolate reductase in a herpesvirus (1988)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1988-03-04
    Description: The enzyme dihydrofolate reductase (DHFR) is found ubiquitously in both prokaryotes and eukaryotes. It is essential for de novo synthesis of purines and of deoxythymidine monophosphate for DNA synthesis. Among viruses, however, only the T-even and T5 bacteriophage have been found to encode their own DHFR. In this study a gene for DHFR was found in a specific subgroup of the gamma or lymphotropic class of herpesviruses. DNA sequences for DHFR were found in herpesvirus saimiri and herpesvirus ateles but not in Epstein-Barr virus, Marek's disease virus, herpes simplex virus, varicella-zoster virus, herpesvirus tamarinus, or human cytomegalovirus. The predicted sequence of herpesvirus saimiri DHFR is 186 amino acids in length, the same length as human, murine, and bovine DHFR. The human and herpesvirus saimiri DHFRs share 83 percent positional identity in amino acid sequence. The herpesvirus saimiri DHFR gene is devoid of intron sequences, suggesting that it was acquired by some process involving reverse transcription. This is to our knowledge the first example of a mammalian virus with a gene for DHFR.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Trimble, J J -- Murthy, S C -- Bakker, A -- Grassmann, R -- Desrosiers, R C -- 31363/PHS HHS/ -- RR00168/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1988 Mar 4;239(4844):1145-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉New England Regional Primate Research Center, Harvard Medical School, Southborough, MA 01772.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2830673" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Cattle ; Chickens ; Cytomegalovirus/enzymology ; Herpesviridae/*enzymology ; Herpesvirus 2, Saimiriine/*enzymology ; Herpesvirus 4, Human/enzymology ; Humans ; Introns ; Mice ; Molecular Sequence Data ; Sequence Homology, Nucleic Acid ; Tetrahydrofolate Dehydrogenase/*genetics
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  • 10
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    Dual actions of substance P on nociception: possible role of endogenous opioids (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-03-24
    Description: Substance P produces analgesia when administered to mice in very small doses by the intraventricular route (1.25 to 5 nanograms per mouse). The analgesic effect can be blocked by naloxone. At higher doses (greater than 50 nanograms per mouse), this activity is lost. At these higher doses, however, substance P produced hyperalgesia when combined with naloxone and analgesia when combined with baclofen [beta-(4-chlorophenyl)-gamma-aminobutyric acid]. Substance P may have dual actions in brain, releasing endorphins at very low doses and directly exciting neuronal activity in nociceptive pathways at higher doses.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Frederickson, R C -- Burgis, V -- Harrell, C E -- Edwards, J D -- New York, N.Y. -- Science. 1978 Mar 24;199(4335):1359-62.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/204012" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Baclofen/pharmacology ; Dose-Response Relationship, Drug ; Endorphins/*pharmacology ; Enkephalins/antagonists & inhibitors/*pharmacology ; Mice ; Naloxone/pharmacology ; Nociceptors/*drug effects ; Receptors, Opioid/*drug effects ; Structure-Activity Relationship ; Substance P/analogs & derivatives/antagonists & inhibitors/*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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