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  • Signal Transduction  (353)
  • Ecosystem
  • American Association for the Advancement of Science (AAAS)  (582)
  • 2005-2009  (576)
  • 1985-1989  (6)
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  • 1
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    In vivo modulation of cytolytic activity and Thy-1 expression in TCR-gamma delta+ intraepithelial lymphocytes (1989)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1989-03-31
    Description: Although the functional aspects of the alpha beta T cell antigen receptor (TCR) found on most peripheral T cells are well described, the function of the gamma delta TCR remains unclear. Murine intraepithelial lymphocytes (IEL) of the small intestine are CD8+, express the gamma delta TCR, and are constitutively lytic. Fresh IEL from germ-free mice had no lytic activity. Moreover, whereas IEL from normal mice are 30 to 50 percent Thy-1+, IEL from germ-free did not express Thy-1. Acclimation of germ-free mice to nonsterile conditions resulted in the generation of Thy-1+ IEL and induction of lytic activity. Thus CD8+ TCR-gamma delta IEL were regulated by externally derived stimuli via a specific functional interaction between IEL and gut-associated antigens.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lefrancois, L -- Goodman, T -- New York, N.Y. -- Science. 1989 Mar 31;243(4899):1716-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell Biology, Upjohn Company, Kalamazoo, MI 49001.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2564701" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens/immunology ; Antigens, CD8 ; Antigens, Differentiation, T-Lymphocyte/analysis ; Antigens, Surface/*analysis/immunology ; Antigens, Thy-1 ; *Cytotoxicity, Immunologic ; Epithelial Cells ; Germ-Free Life ; Immunosorbent Techniques ; Intestine, Small/*cytology ; Mice ; Mice, Inbred BALB C ; Mice, Inbred C57BL ; Receptors, Antigen, T-Cell/analysis/*immunology ; Signal Transduction ; T-Lymphocytes/*immunology
    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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    Beta-adrenergic inhibition of cardiac sodium channels by dual G-protein pathways (1989)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1989-08-04
    Description: The signaling pathways by which beta-adrenergic agonists modulate voltage-dependent cardiac sodium currents are unknown, although it is likely that adenosine 3'5'-monophosphate (cAMP) is involved. Single-channel and whole-cell sodium currents were measured in cardiac myocytes and the signal transducing G protein Gs was found to couple beta-adrenergic receptors to sodium channels by both cytoplasmic (indirect) and membrane-delimited (direct) pathways. Hence, Gs can act on at least three effectors in the heart: sodium channels, calcium channels, and adenylyl cyclase. The effect on sodium currents was inhibitory and was enhanced by membrane depolarization. During myocardial ischemia the sodium currents of depolarized cells may be further inhibited by the accompanying increase in catecholamine levels.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schubert, B -- VanDongen, A M -- Kirsch, G E -- Brown, A M -- DK19319/DK/NIDDK NIH HHS/ -- HL36930/HL/NHLBI NIH HHS/ -- HL39262/HL/NHLBI NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1989 Aug 4;245(4917):516-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Physiology and Biophysics, Baylor College of Medicine, Houston, TX 77030.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2547248" target="_blank"〉PubMed〈/a〉
    Keywords: 8-Bromo Cyclic Adenosine Monophosphate/pharmacology ; Animals ; Cyclic AMP/physiology ; Electric Conductivity ; GTP-Binding Proteins/*physiology ; Guanosine 5'-O-(3-Thiotriphosphate) ; Guanosine Triphosphate/analogs & derivatives/pharmacology ; Heart/drug effects/*physiology ; Isoproterenol/pharmacology ; Potassium Channels/physiology ; Rats ; Receptors, Adrenergic, beta/*physiology ; Signal Transduction ; Sodium Channels/*physiology ; Thionucleotides/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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  • 3
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    Interleukin-2 receptor beta chain gene: generation of three receptor forms by cloned human alpha and beta chain cDNA's (1989)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1989-05-05
    Description: Interleukin-2 (IL-2) binds to two distinct receptor molecules, the IL-2 receptor alpha (IL-2R alpha, p55) chain and the newly identified IL-2 receptor beta (IL-2R beta, p70-75) chain. The cDNA encoding the human IL-2R beta chain has now been isolated. The overall primary structure of the IL-2R beta chain shows no apparent homology to other known receptors. Unlike the IL-2R alpha chain, the IL-2R beta chain has a large cytoplasmic region in which a functional domain (or domains) mediating an intracellular signal transduction pathway (or pathways) may be embodied. The cDNA-encoded beta chain binds and internalizes IL-2 when expressed on T lymphoid cells but not fibroblast cells. Furthermore, the cDNA gives rise to the generation of high-affinity IL-2 receptor when co-expressed with the IL-2R alpha chain cDNA.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hatakeyama, M -- Tsudo, M -- Minamoto, S -- Kono, T -- Doi, T -- Miyata, T -- Miyasaka, M -- Taniguchi, T -- New York, N.Y. -- Science. 1989 May 5;244(4904):551-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute for Molecular and Cellular Biology, Osaka University, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2785715" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Base Sequence ; *Cloning, Molecular ; Cross-Linking Reagents ; DNA/*genetics/isolation & purification ; Fibroblasts/metabolism ; Gene Expression Regulation ; Humans ; Interleukin-2/metabolism ; Leukemia ; Molecular Sequence Data ; Nucleic Acid Hybridization ; RNA, Messenger/genetics ; Receptors, Interleukin-2/*genetics/metabolism ; Recombinant Proteins ; Sequence Homology, Nucleic Acid ; Signal Transduction ; Succinimides ; T-Lymphocytes/metabolism ; Transfection ; 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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    G1 events and regulation of cell proliferation (1989)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1989-11-03
    Description: Cells prepare for S phase during the G1 phase of the cell cycle. Cell biological methods have provided knowledge of cycle kinetics and of substages of G1 that are determined by extracellular signals. Through the use of biochemical and molecular biological techniques to study effects of growth factors, oncogenes, and inhibitors, intracellular events during G1 that lead to DNA synthesis are rapidly being discovered. Many cells in vivo are in a quiescent state (G0), with unduplicated DNA. Cells can be activated to reenter the cycle during G1. Similarly, cells in culture can be shifted between G0 and G1. These switches in and out of G1 are the main determinants of post-embryonic cell proliferation rate and are defectively controlled in cancer cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pardee, A B -- 24571/PHS HHS/ -- New York, N.Y. -- Science. 1989 Nov 3;246(4930):603-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2683075" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Cycle ; *Cell Division ; Cell Membrane/physiology ; Cell Nucleus/physiology ; Gene Expression ; Humans ; *Interphase ; Models, Biological ; Neoplasms/pathology ; Signal Transduction
    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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    Isotopic evidence for dietary variability in the early hominin Paranthropus robustus (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2006-11-11
    Description: Traditional methods of dietary reconstruction do not allow the investigation of dietary variability within the lifetimes of individual hominins. However, laser ablation stable isotope analysis reveals that the delta13C values of Paranthropus robustus individuals often changed seasonally and interannually. These data suggest that Paranthropus was not a dietary specialist and that by about 1.8 million years ago, savanna-based foods such as grasses or sedges or animals eating these foods made up an important but highly variable part of its diet.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sponheimer, Matt -- Passey, Benjamin H -- de Ruiter, Darryl J -- Guatelli-Steinberg, Debbie -- Cerling, Thure E -- Lee-Thorp, Julia A -- New York, N.Y. -- Science. 2006 Nov 10;314(5801):980-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Anthropology, University of Colorado at Boulder, Boulder, CO 80309, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17095699" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Carbon Isotopes/*analysis ; Climate ; Dental Enamel/*chemistry ; *Diet ; Ecosystem ; *Fossils ; *Hominidae ; Lasers ; *Paleodontology ; Plants ; Poaceae ; Rain ; Seasons ; South Africa
    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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    Evolution. The origin of insects (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2006-12-23
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Glenner, Henrik -- Thomsen, Philip Francis -- Hebsgaard, Martin Bay -- Sorensen, Martin Vinther -- Willerslev, Eske -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 2006 Dec 22;314(5807):1883-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Centre for Ancient Genetics, Department of Evolutionary Biology, Biological Institute, University of Copenhagen, Universitetsparken 15, DK-2100 Copenhagen, Denmark. ewillerslev@bi.ku.dk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17185588" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptation, Biological ; Animals ; *Biological Evolution ; *Crustacea/anatomy & histology/classification/genetics/physiology ; Ecosystem ; Fossils ; Fresh Water ; *Insects/anatomy & histology/classification/genetics/physiology ; Phylogeny ; Seawater ; Time
    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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    Community collaborations. Collaborative ecological restoration (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2006-07-01
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gold, Warren -- Ewing, Kern -- Banks, John -- Groom, Martha -- Hinckley, Tom -- Secord, David -- Shebitz, Daniela -- New York, N.Y. -- Science. 2006 Jun 30;312(5782):1880-1.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Interdisciplinary Arts and Sciences Program, University of Washington, Bothell, WA 98011, USA. wgold@u.washington.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16809514" target="_blank"〉PubMed〈/a〉
    Keywords: *Conservation of Natural Resources ; Curriculum ; Ecology/*education ; Ecosystem ; Environment ; Faculty ; *Interdisciplinary Communication ; *Universities ; Washington
    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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  • 8
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    Lhx2 maintains stem cell character in hair follicles (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2006-07-01
    Description: During embryogenesis, stem cells are set aside to fuel the postnatal hair cycle and repair the epidermis after injury. To define how hair follicle stem cells are specified and maintained in an undifferentiated state, we developed a strategy to isolate and transcriptionally profile embryonic hair progenitors in mice. We identified Lhx2 as a transcription factor positioned downstream of signals necessary to specify hair follicle stem cells, but upstream from signals required to drive activated stem cells to terminally differentiate. Using gain- and loss-of-function studies, we uncovered a role for Lhx2 in maintaining the growth and undifferentiated properties of hair follicle progenitors.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2405918/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2405918/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rhee, Horace -- Polak, Lisa -- Fuchs, Elaine -- R01 AR031737/AR/NIAMS NIH HHS/ -- R01 AR031737-24/AR/NIAMS NIH HHS/ -- R01 AR050452/AR/NIAMS NIH HHS/ -- R01 AR050452-04/AR/NIAMS NIH HHS/ -- R01-AR050452/AR/NIAMS NIH HHS/ -- New York, N.Y. -- Science. 2006 Jun 30;312(5782):1946-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Rockefeller University, 1230 York Avenue, New York, NY 10021.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16809539" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Differentiation ; Cell Lineage ; Cell Proliferation ; Epidermis/cytology/embryology ; Female ; Gene Expression Profiling ; Gene Expression Regulation, Developmental ; Hair/embryology/growth & development ; Hair Follicle/*cytology/embryology/physiology ; Homeodomain Proteins/genetics/*physiology ; LIM-Homeodomain Proteins ; Male ; Mice ; Mice, Knockout ; Mice, Transgenic ; Morphogenesis ; Oligonucleotide Array Sequence Analysis ; Signal Transduction ; Skin Transplantation ; Stem Cells/*physiology ; Transcription Factors/genetics/*physiology ; Up-Regulation
    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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    Immunology. Restless T cells sniff and go (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2006-09-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mustelin, Tomas -- New York, N.Y. -- Science. 2006 Sep 29;313(5795):1902-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Program on Inflammatory Disease Research, Infectious and Inflammatory Disease Center, and Program of Signal Transduction, Cancer Center, Burnham Institute for Medical Research, La Jolla, CA 92037, USA. tmustelin@burnham.org〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17008518" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigen Presentation ; Antigens, CD ; Antigens, CD28/metabolism ; Antigens, CD80/metabolism ; Antigens, CD86/metabolism ; Antigens, Differentiation/genetics/*physiology ; *Autoimmunity ; CTLA-4 Antigen ; Cell Adhesion ; Cell Movement ; Dendritic Cells/immunology ; Humans ; Integrins/physiology ; Ligands ; Lymph Nodes/*immunology ; Lymphocyte Activation ; Mice ; Receptors, Antigen, T-Cell/immunology/metabolism ; Signal Transduction ; T-Lymphocytes/immunology/*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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  • 10
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    Aquaculture in offshore zones (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2006-12-23
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Goudey, Clifford A -- New York, N.Y. -- Science. 2006 Dec 22;314(5807):1875-6; author reply 1875-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17185585" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Aquaculture/*legislation & jurisprudence ; Ecosystem ; Environment ; Fisheries/legislation & jurisprudence ; Oceans and Seas ; United States
    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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