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  • Signal Transduction  (13)
  • American Association for the Advancement of Science (AAAS)  (13)
  • PANGAEA
  • 2015-2019
  • 2000-2004  (6)
  • 1995-1999  (7)
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  • American Association for the Advancement of Science (AAAS)  (13)
  • PANGAEA
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  • 1
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1998-12-18
    Description: During T cell activation, the engagement of costimulatory molecules is often crucial to the development of an effective immune response, but the mechanism by which this is achieved is not known. Here, it is shown that beads attached to the surface of a T cell translocate toward the interface shortly after the start of T cell activation. This movement appears to depend on myosin motor proteins and requires the engagement of the major costimulatory receptor pairs, B7-CD28 and ICAM-1-LFA-1. This suggests that the engagement of costimulatory receptors triggers an active accumulation of molecules at the interface of the T cell and the antigen-presenting cell, which then increases the overall amplitude and duration of T cell signaling.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wulfing, C -- Davis, M M -- New York, N.Y. -- Science. 1998 Dec 18;282(5397):2266-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute and Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford, CA 94305, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9856952" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigen Presentation ; Antigen-Presenting Cells/immunology ; Antigens, CD/*metabolism ; Antigens, CD28/metabolism ; Antigens, CD86 ; Biotinylation ; CHO Cells ; Calcium/metabolism ; Cricetinae ; Cytoskeleton/*physiology ; Intercellular Adhesion Molecule-1/metabolism ; *Lymphocyte Activation ; Lymphocyte Function-Associated Antigen-1/metabolism ; Membrane Glycoproteins/metabolism ; Mice ; Microspheres ; Molecular Motor Proteins/physiology ; Myosins/physiology ; Phosphatidylinositol 3-Kinases/metabolism ; Receptors, Antigen, T-Cell/immunology ; Signal Transduction ; T-Lymphocytes/*immunology/metabolism/ultrastructure ; 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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  • 2
    Publication Date: 1999-05-29
    Description: Endoglin is a transforming growth factor-beta (TGF-beta) binding protein expressed on the surface of endothelial cells. Loss-of-function mutations in the human endoglin gene ENG cause hereditary hemorrhagic telangiectasia (HHT1), a disease characterized by vascular malformations. Here it is shown that by gestational day 11.5, mice lacking endoglin die from defective vascular development. However, in contrast to mice lacking TGF-beta, vasculogenesis was unaffected. Loss of endoglin caused poor vascular smooth muscle development and arrested endothelial remodeling. These results demonstrate that endoglin is essential for angiogenesis and suggest a pathogenic mechanism for HHT1.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Li, D Y -- Sorensen, L K -- Brooke, B S -- Urness, L D -- Davis, E C -- Taylor, D G -- Boak, B B -- Wendel, D P -- K08 HL03490-03/HL/NHLBI NIH HHS/ -- T35 HL07744-06/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1999 May 28;284(5419):1534-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Program in Human Molecular Biology and Genetics, Department of Human Genetics, Howard Hughes Medical Institute, University of Utah, Salt Lake City, UT 84112-5330, USA. dean.li@hci.utah.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10348742" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD ; Antigens, CD31/analysis ; Blood Vessels/cytology/*embryology/metabolism ; Cell Differentiation ; Crosses, Genetic ; Endothelium, Vascular/cytology/*embryology/metabolism ; Female ; Gene Targeting ; In Situ Hybridization ; Male ; Mice ; Mice, Inbred C57BL ; Microscopy, Electron ; Muscle, Smooth, Vascular/cytology/*embryology ; *Neovascularization, Physiologic ; Receptors, Cell Surface ; Signal Transduction ; Transforming Growth Factor beta/metabolism ; Vascular Cell Adhesion Molecule-1/genetics/*physiology ; Yolk Sac/ultrastructure
    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
    Publication Date: 2000-01-05
    Description: Phytochromes are a family of photoreceptors used by green plants to entrain their development to the light environment. The distribution of these chromoproteins has been expanded beyond photoautotrophs with the discovery of phytochrome-like proteins in the nonphotosynthetic eubacteria Deinococcus radiodurans and Pseudomonas aeruginosa. Like plant phytochromes, the D. radiodurans receptor covalently binds linear tetrapyrroles autocatalytically to generate a photochromic holoprotein. However, the attachment site is distinct, using a histidine to potentially form a Schiff base linkage. Sequence homology and mutational analysis suggest that D. radiodurans bacteriophytochrome functions as a light-regulated histidine kinase, which helps protect the bacterium from visible light.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Davis, S J -- Vener, A V -- Vierstra, R D -- New York, N.Y. -- Science. 1999 Dec 24;286(5449):2517-20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Genetics, Cellular and Molecular Biology Program and Department of Horticulture, University of Wisconsin-Madison, 1575 Linden Drive, Madison, WI 53706, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10617469" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Amino Acid Substitution ; Bacterial Proteins/chemistry/genetics/*metabolism ; Biliverdine/analogs & derivatives/metabolism ; Binding Sites ; Gram-Positive Cocci/genetics/*metabolism ; Histidine/metabolism ; Light ; Molecular Sequence Data ; Mutagenesis, Site-Directed ; Photoreceptors, Microbial/chemistry/genetics/*metabolism ; Phytochrome/metabolism ; Protein Kinases/chemistry/genetics/*metabolism ; Pseudomonas aeruginosa/*metabolism ; 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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  • 4
    Publication Date: 2000-06-24
    Description: T helper 1 (TH1) cells mediate cellular immunity, whereas TH2 cells potentiate antiparasite and humoral immunity. We used a complementary DNA subtraction method, representational display analysis, to show that the small guanosine triphosphatase Rac2 is expressed selectively in murine TH1 cells. Rac induces the interferon-gamma (IFN-gamma) promoter through cooperative activation of the nuclear factor kappa B and p38 mitogen-activated protein kinase pathways. Tetracycline-regulated transgenic mice expressing constitutively active Rac2 in T cells exhibited enhanced IFN-gamma production. Dominant-negative Rac inhibited IFN-gamma production in murine T cells. Moreover, T cells from Rac2-/- mice showed decreased IFN-gamma production under TH1 conditions in vitro. Thus, Rac2 activates TH1-specific signaling and IFN-gamma gene expression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Li, B -- Yu, H -- Zheng, W -- Voll, R -- Na, S -- Roberts, A W -- Williams, D A -- Davis, R J -- Ghosh, S -- Flavell, R A -- New York, N.Y. -- Science. 2000 Jun 23;288(5474):2219-22.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Section of Immunobiology and Howard Hughes Medical Institute, Yale University School of Medicine, 310 Cedar Street, New Haven, CT 06520-8011, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10864872" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Differentiation ; Cells, Cultured ; Cytokines/biosynthesis/genetics ; Gene Expression Regulation ; Humans ; Interferon-gamma/biosynthesis/*genetics ; JNK Mitogen-Activated Protein Kinases ; Jurkat Cells ; Lymphocyte Activation ; Mice ; Mice, Transgenic ; Mitogen-Activated Protein Kinases/metabolism ; NF-kappa B/metabolism ; Promoter Regions, Genetic ; Signal Transduction ; Th1 Cells/cytology/*immunology/*metabolism ; Transfection ; p38 Mitogen-Activated Protein Kinases ; rac GTP-Binding Proteins/genetics/*metabolism
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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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  • 5
    Publication Date: 1999-07-10
    Description: The specialized junction between a T lymphocyte and an antigen-presenting cell, the immunological synapse, consists of a central cluster of T cell receptors surrounded by a ring of adhesion molecules. Immunological synapse formation is now shown to be an active and dynamic mechanism that allows T cells to distinguish potential antigenic ligands. Initially, T cell receptor ligands were engaged in an outermost ring of the nascent synapse. Transport of these complexes into the central cluster was dependent on T cell receptor-ligand interaction kinetics. Finally, formation of a stable central cluster at the heart of the synapse was a determinative event for T cell proliferation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Grakoui, A -- Bromley, S K -- Sumen, C -- Davis, M M -- Shaw, A S -- Allen, P M -- Dustin, M L -- New York, N.Y. -- Science. 1999 Jul 9;285(5425):221-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Immunology and the Department of Pathology, Washington University School of Medicine, 660 South Euclid Avenue, St. Louis, MO 63110, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10398592" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigen-Presenting Cells/immunology/metabolism ; Antigens, CD4/immunology/metabolism ; CHO Cells ; Cell Movement ; Cricetinae ; Cytochrome c Group/immunology/metabolism ; Fluorescence ; Histocompatibility Antigens/immunology/*metabolism ; Intercellular Adhesion Molecule-1/immunology/metabolism ; Ligands ; Lipid Bilayers ; *Lymphocyte Activation ; Mice ; Mice, Transgenic ; Microscopy, Interference ; Models, Immunological ; Peptides/immunology/metabolism ; Receptors, Antigen, T-Cell/immunology/*metabolism ; Signal Transduction ; T-Lymphocytes/*immunology/metabolism ; Time Factors
    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
    Publication Date: 2001-12-26
    Description: The circadian clock in the suprachiasmatic nucleus (SCN) is thought to drive daily rhythms of behavior by secreting factors that act locally within the hypothalamus. In a systematic screen, we identified transforming growth factor-alpha (TGF-alpha) as a likely SCN inhibitor of locomotion. TGF-alpha is expressed rhythmically in the SCN, and when infused into the third ventricle it reversibly inhibited locomotor activity and disrupted circadian sleep-wake cycles. These actions are mediated by epidermal growth factor (EGF) receptors on neurons in the hypothalamic subparaventricular zone. Mice with a hypomorphic EGF receptor mutation exhibited excessive daytime locomotor activity and failed to suppress activity when exposed to light. These results implicate EGF receptor signaling in the daily control of locomotor activity, and identify a neural circuit in the hypothalamus that likely mediates the regulation of behavior both by the SCN and the retina.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kramer, A -- Yang, F C -- Snodgrass, P -- Li, X -- Scammell, T E -- Davis, F C -- Weitz, C J -- HD-18686/HD/NICHD NIH HHS/ -- MH62589/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 2001 Dec 21;294(5551):2511-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurobiology, Harvard Medical School, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11752569" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Clocks/drug effects/physiology ; Body Temperature/drug effects ; Cerebral Ventricles/metabolism ; Circadian Rhythm/drug effects/*physiology ; Cricetinae ; Darkness ; Epidermal Growth Factor/pharmacology ; Female ; Hypothalamus/*metabolism ; Ligands ; Light ; Male ; Mesocricetus ; Mice ; *Motor Activity/drug effects ; Neural Pathways/physiology ; Neurons/metabolism ; Point Mutation ; Receptor, Epidermal Growth Factor/genetics/*metabolism ; Retina/metabolism ; Retinal Ganglion Cells/metabolism ; Signal Transduction ; Sleep/drug effects/*physiology ; Suprachiasmatic Nucleus/*metabolism ; Transforming Growth Factor alpha/administration & ; dosage/genetics/metabolism/pharmacology
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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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  • 7
    Publication Date: 2002-02-23
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉van Der Merwe, P Anton -- Davis, Simon J -- New York, N.Y. -- Science. 2002 Feb 22;295(5559):1479-80.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Sir William Dunn School of Pathology, University of Oxford, Oxford OX1 3RE, UK. anton.vandermerwe@path.ox.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11859183" target="_blank"〉PubMed〈/a〉
    Keywords: Abatacept ; Animals ; Antigen-Presenting Cells/*immunology ; Antigens, CD ; Antigens, CD28/immunology/metabolism ; Antigens, CD80/immunology/metabolism ; Antigens, Differentiation/metabolism ; CD4-Positive T-Lymphocytes/immunology ; CD8-Positive T-Lymphocytes/immunology ; CTLA-4 Antigen ; Dimerization ; Histocompatibility Antigens Class II/metabolism ; *Immunoconjugates ; Immunoglobulin alpha-Chains/immunology/metabolism ; Intercellular Junctions/*immunology ; Ligands ; Lipid Bilayers ; Lymphocyte Activation ; Mice ; Peptides/immunology/metabolism ; Receptor Aggregation ; Receptors, Antigen, T-Cell/*immunology ; Signal Transduction ; T-Lymphocytes/*immunology ; Time Factors
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  • 8
    Publication Date: 1999-12-22
    Description: Mice lacking estrogen receptors alpha and beta were generated to clarify the roles of each receptor in the physiology of estrogen target tissues. Both sexes of alphabeta estrogen receptor knockout (alphabetaERKO) mutants exhibit normal reproductive tract development but are infertile. Ovaries of adult alphabetaERKO females exhibit follicle transdifferentiation to structures resembling seminiferous tubules of the testis, including Sertoli-like cells and expression of Mullerian inhibiting substance, sulfated glycoprotein-2, and Sox9. Therefore, loss of both receptors leads to an ovarian phenotype that is distinct from that of the individual ERKO mutants, which indicates that both receptors are required for the maintenance of germ and somatic cells in the postnatal ovary.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Couse, J F -- Hewitt, S C -- Bunch, D O -- Sar, M -- Walker, V R -- Davis, B J -- Korach, K S -- New York, N.Y. -- Science. 1999 Dec 17;286(5448):2328-31.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Receptor Biology Section, Laboratory of Reproductive and Developmental Toxicology, Laboratory of Experimental Pathology, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC 27709, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10600740" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anti-Mullerian Hormone ; Cell Differentiation ; Clusterin ; *Disorders of Sex Development ; Estradiol/physiology ; Estrogen Receptor alpha ; Estrogen Receptor beta ; Female ; Gene Targeting ; Glycoproteins/analysis ; Growth Inhibitors/analysis ; High Mobility Group Proteins/analysis ; Luteinizing Hormone/blood ; Male ; Mice ; Mice, Knockout ; *Molecular Chaperones ; Ovary/*anatomy & histology/cytology/growth & development/*physiology ; Receptors, Estrogen/genetics/*physiology ; SOX9 Transcription Factor ; Seminiferous Tubules/anatomy & histology/cytology ; Sertoli Cells/cytology ; Signal Transduction ; Testicular Hormones/analysis ; Testis/anatomy & histology/cytology/growth & development/physiology ; Transcription Factors/analysis
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  • 9
    Publication Date: 2001-06-09
    Description: The mushroom bodies of the Drosophila brain are important for olfactory learning and memory. To investigate the requirement for mushroom body signaling during the different phases of memory processing, we transiently inactivated neurotransmission through this region of the brain by expressing a temperature-sensitive allele of the shibire dynamin guanosine triphosphatase, which is required for synaptic transmission. Inactivation of mushroom body signaling through alpha/beta neurons during different phases of memory processing revealed a requirement for mushroom body signaling during memory retrieval, but not during acquisition or consolidation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McGuire, S E -- Le, P T -- Davis, R L -- NS19904/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 2001 Aug 17;293(5533):1330-3. Epub 2001 Jun 7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11397912" target="_blank"〉PubMed〈/a〉
    Keywords: Afferent Pathways/physiology ; Animals ; Brain/physiology ; Conditioning, Classical ; Drosophila/genetics/*physiology ; *Drosophila Proteins ; Dynamins ; Electroshock ; GTP Phosphohydrolases/genetics/physiology ; Gene Targeting ; Genes, Insect ; Memory/*physiology ; Mental Recall/physiology ; Mutation ; Neurons/*physiology ; *Odors ; Signal Transduction ; *Synaptic Transmission ; Temperature ; Transgenes
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 10
    Publication Date: 1997-07-04
    Description: Angiogenesis is thought to depend on a precise balance of positive and negative regulation. Angiopoietin-1 (Ang1) is an angiogenic factor that signals through the endothelial cell-specific Tie2 receptor tyrosine kinase. Like vascular endothelial growth factor, Ang1 is essential for normal vascular development in the mouse. An Ang1 relative, termed angiopoietin-2 (Ang2), was identified by homology screening and shown to be a naturally occurring antagonist for Ang1 and Tie2. Transgenic overexpression of Ang2 disrupts blood vessel formation in the mouse embryo. In adult mice and humans, Ang2 is expressed only at sites of vascular remodeling. Natural antagonists for vertebrate receptor tyrosine kinases are atypical; thus, the discovery of a negative regulator acting on Tie2 emphasizes the need for exquisite regulation of this angiogenic receptor system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Maisonpierre, P C -- Suri, C -- Jones, P F -- Bartunkova, S -- Wiegand, S J -- Radziejewski, C -- Compton, D -- McClain, J -- Aldrich, T H -- Papadopoulos, N -- Daly, T J -- Davis, S -- Sato, T N -- Yancopoulos, G D -- New York, N.Y. -- Science. 1997 Jul 4;277(5322):55-60.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Regeneron Pharmaceuticals Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9204896" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Angiopoietin-1 ; Angiopoietin-2 ; Animals ; Blood Vessels/embryology/*metabolism ; Cells, Cultured ; Cloning, Molecular ; Embryo, Mammalian/metabolism ; Endothelial Growth Factors/genetics/metabolism ; Endothelium, Vascular/*cytology/metabolism ; Female ; Humans ; Ligands ; Lymphokines/genetics/metabolism ; Membrane Glycoproteins/antagonists & inhibitors/metabolism ; Mice ; Mice, Transgenic ; Molecular Sequence Data ; *Neovascularization, Physiologic ; Phosphorylation ; Proteins/chemistry/*metabolism ; Rats ; Rats, Sprague-Dawley ; Receptor Protein-Tyrosine Kinases/*antagonists & inhibitors/metabolism ; Receptor, TIE-2 ; Recombinant Fusion Proteins/metabolism ; Signal Transduction ; Vascular Endothelial Growth Factor A ; Vascular Endothelial Growth Factors
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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