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  • 1
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    Dendritic cells exposed to human immunodeficiency virus type-1 transmit a vigorous cytopathic infection to CD4+ T cells (1992)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1992-07-17
    Description: The paucity of virus-laden CD4+ cells in individuals infected with human immunodeficiency virus type-1 (HIV-1) contrasts with the greatly reduced numbers and function of these lymphocytes. A pathway is described whereby dendritic cells carry HIV-1 to uninfected T cells, amplifying the cytopathic effects of small amounts of virus. After exposure to HIV-1, dendritic cells continue to present superantigens and antigens, forming clusters with T cells that are driven to replicate. Infection of the dendritic cells cannot be detected, but the clustered T cells form syncytia, release virions, and die. Carriage of HIV-1 by dendritic cells may facilitate the lysis and loss of antigen specific CD4+ T cells in acquired immunodeficiency syndrome.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cameron, P U -- Freudenthal, P S -- Barker, J M -- Gezelter, S -- Inaba, K -- Steinman, R M -- AI 24775/AI/NIAID NIH HHS/ -- MOI-RR00102/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1992 Jul 17;257(5068):383-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory for Cellular Physiology and Immunology, Rockefeller University, New York, NY 10021.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1352913" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/drug therapy/*transmission ; Animals ; Antigen-Presenting Cells/immunology ; CD4-Positive T-Lymphocytes/*immunology/*microbiology ; Cell Separation ; Dendritic Cells/*immunology/*microbiology ; Flow Cytometry ; HIV Core Protein p24/biosynthesis ; HIV Long Terminal Repeat/physiology ; HIV-1/*pathogenicity ; In Vitro Techniques ; Lymphocyte Culture Test, Mixed ; Mice ; Microscopy, Electron ; Polymerase Chain Reaction ; Zidovudine/pharmacology
    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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  • 2
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    Origin of bilaterian body plans: evolution of developmental regulatory mechanisms (1995)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1995-11-24
    Description: An argument is proposed to explain the origin of large metazoans, based on the regulatory processes that underlie the morphogenetic organization of pattern in modern animals. Genetic regulatory systems similar to those used in modern, indirectly developing marine invertebrates are considered to indicate the Precambrian regulatory platform on which were erected innovations that underlie the development of macroscopic body plans. Those systems are genetic regulatory programs that produce groups of unspecified "set-aside cells" and hierarchical regulatory programs that initially define regions of morphogenetic space in terms of domains of transcription factor expression. These ideas affect interpretation of the development of arthropods and chordates as well as interpretation of the role of the genes of the homeotic complex in embryogenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Davidson, E H -- Peterson, K J -- Cameron, R A -- HD-05753/HD/NICHD NIH HHS/ -- RR-06591/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1995 Nov 24;270(5240):1319-25.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Biology, California Institute of Technology, Pasadena 91125, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7481819" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arthropods/embryology/genetics/growth & development ; *Biological Evolution ; Cell Differentiation/genetics ; Chordata, Nonvertebrate/embryology/genetics/*growth & development ; *Embryonic Development ; Fossils ; *Gene Expression Regulation, Developmental ; Genes, Homeobox ; Invertebrates/embryology/genetics/*growth & development ; Morphogenesis ; Multigene Family ; Vertebrates/embryology/genetics/*growth & development
    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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  • 3
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    Retinoids selective for retinoid X receptor response pathways (1992)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1992-12-18
    Description: Retinoids have a broad spectrum of biological activities and are useful therapeutic agents. Their physiological activities are mediated by two types of receptors, the retinoic acid receptors (RARs) and the retinoid X receptors (RXRs). RARs, as well as several related receptors, require heterodimerization with RXRs for effective DNA binding and function. However, in the presence of 9-cis-retinoic acid, a ligand for both RARs and RXRs, RXRs can also form homodimers. A series of retinoids is reported that selectively activates RXR homodimers but does not affect RAR-RXR heterodimers and thus demonstrates that both retinoid response pathways can be independently activated.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lehmann, J M -- Jong, L -- Fanjul, A -- Cameron, J F -- Lu, X P -- Haefner, P -- Dawson, M I -- Pfahl, M -- CA50676/CA/NCI NIH HHS/ -- P01 CA51993/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1992 Dec 18;258(5090):1944-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cancer Center, La Jolla Cancer Research Foundation, La Jolla, CA 92037.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1335166" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Chloramphenicol O-Acetyltransferase/genetics/metabolism ; Kinetics ; Macromolecular Substances ; Molecular Structure ; Receptors, Cell Surface/drug effects/genetics/*metabolism ; *Receptors, Retinoic Acid ; Recombinant Fusion Proteins/metabolism ; Retinoid X Receptors ; Retinoids/chemistry/*metabolism/pharmacology ; Structure-Activity Relationship ; *Transcription Factors ; Transcription, Genetic ; Transfection ; Tretinoin/metabolism/pharmacology
    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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