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  • Humans  (3,501)
  • Analytical Chemistry and Spectroscopy
  • Chemical Engineering
  • 2000-2004  (3,602)
  • 11
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    Role of the kinase MST2 in suppression of apoptosis by the proto-oncogene product Raf-1 (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-12-25
    Description: The ablation of the protein kinase Raf-1 renders cells hypersensitive to apoptosis despite normal regulation of extracellular signal-regulated kinases, which suggests that apoptosis protection is mediated by a distinct pathway. We used proteomic analysis of Raf-1 signaling complexes to show that Raf-1 counteracts apoptosis by suppressing the activation of mammalian sterile 20-like kinase (MST2). Raf-1 prevents dimerization and phosphorylation of the activation loop of MST2 independently of its protein kinase activity. Depletion of MST2 from Raf-1-/- mouse or human cells abrogated sensitivity to apoptosis, whereas overexpression of MST2 induced apoptosis. Conversely, depletion of Raf-1 from Raf-1+/+ mouse or human cells led to MST2 activation and apoptosis. The concomitant depletion of both Raf-1 and MST2 prevented apoptosis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉O'Neill, Eric -- Rushworth, Linda -- Baccarini, Manuela -- Kolch, Walter -- New York, N.Y. -- Science. 2004 Dec 24;306(5705):2267-70.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Beatson Institute for Cancer Research, Garscube Estate, Switchback Road, Glasgow G61 1BD, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15618521" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD95/metabolism ; *Apoptosis ; COS Cells ; Cell Line, Tumor ; Dimerization ; Humans ; Mice ; Phosphorylation ; Protein-Serine-Threonine Kinases/genetics/*metabolism ; Proteomics ; Proto-Oncogene Proteins c-raf/genetics/*metabolism ; RNA, Small Interfering ; Signal Transduction ; Staurosporine/pharmacology ; Transfection
    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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  • 12
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    Cell biology. A technical fix for an ethical bind? (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-12-25
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Holden, Constance -- Vogel, Gretchen -- New York, N.Y. -- Science. 2004 Dec 24;306(5705):2174-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15618497" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Bioethical Issues ; Blastocyst ; Cell Differentiation ; Cell Division ; Cell Fusion ; Cell Line ; Cell Nucleus/physiology ; Cloning, Organism ; Embryo, Mammalian/cytology/physiology ; *Ethics, Research ; Female ; Humans ; Nuclear Transfer Techniques ; Oocytes/physiology ; Parthenogenesis ; Patents as Topic ; *Pluripotent Stem Cells ; Research Embryo Creation ; Stem Cell Transplantation
    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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  • 13
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    Activity-dependent internalization of smoothened mediated by beta-arrestin 2 and GRK2 (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-12-25
    Description: Binding of Sonic Hedgehog (Shh) to Patched (Ptc) relieves the latter's tonic inhibition of Smoothened (Smo), a receptor that spans the cell membrane seven times. This initiates signaling which, by unknown mechanisms, regulates vertebrate developmental processes. We find that two molecules interact with mammalian Smo in an activation-dependent manner: G protein-coupled receptor kinase 2 (GRK2) leads to phosphorylation of Smo, and beta-arrestin 2 fused to green fluorescent protein interacts with Smo. These two processes promote endocytosis of Smo in clathrin-coated pits. Ptc inhibits association of beta-arrestin 2 with Smo, and this inhibition is relieved in cells treated with Shh. A Smo agonist stimulated and a Smo antagonist (cyclopamine) inhibited both phosphorylation of Smo by GRK2 and interaction of beta-arrestin 2 with Smo. beta-Arrestin 2 and GRK2 are thus potential mediators of signaling by activated Smo.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chen, Wei -- Ren, Xiu-Rong -- Nelson, Christopher D -- Barak, Larry S -- Chen, James K -- Beachy, Philip A -- de Sauvage, Frederic -- Lefkowitz, Robert J -- New York, N.Y. -- Science. 2004 Dec 24;306(5705):2257-60.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, Duke University Medical Center, Durham, NC 27710, USA. w.chen@duke.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15618519" target="_blank"〉PubMed〈/a〉
    Keywords: Arrestins/*metabolism ; Cell Line ; Cell Membrane/*metabolism ; Clathrin/metabolism ; Coated Pits, Cell-Membrane/metabolism ; Cyclic AMP-Dependent Protein Kinases/*metabolism ; Cyclohexylamines/pharmacology ; Cytosol/metabolism ; Dynamins/metabolism ; Endocytosis ; Hedgehog Proteins ; Humans ; Membrane Proteins/metabolism ; Phosphorylation ; Receptors, Cell Surface ; Receptors, G-Protein-Coupled/*metabolism ; Recombinant Fusion Proteins/metabolism ; Signal Transduction ; Thiophenes/pharmacology ; Trans-Activators/metabolism ; Transfection ; Veratrum Alkaloids/pharmacology ; beta-Adrenergic Receptor Kinases
    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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  • 14
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    HIV transmission. Allegations raise fears of backlash against AIDS prevention strategy (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-12-25
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cohen, Jon -- New York, N.Y. -- Science. 2004 Dec 24;306(5705):2168-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15618490" target="_blank"〉PubMed〈/a〉
    Keywords: Anti-HIV Agents/administration & dosage/adverse effects/*therapeutic use ; Clinical Trials as Topic/standards ; Female ; HIV Infections/drug therapy/*prevention & control/*transmission ; Humans ; Infant ; Infant, Newborn ; Infectious Disease Transmission, Vertical/*prevention & control ; National Institutes of Health (U.S.) ; Nevirapine/administration & dosage/adverse effects/*therapeutic use ; Pregnancy ; Pregnancy Complications, Infectious/drug therapy ; Uganda ; United States ; United States Food and Drug Administration
    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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  • 15
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    Mechanisms of hair graying: incomplete melanocyte stem cell maintenance in the niche (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-12-25
    Description: Hair graying is the most obvious sign of aging in humans, yet its mechanism is largely unknown. Here, we used melanocyte-tagged transgenic mice and aging human hair follicles to demonstrate that hair graying is caused by defective self-maintenance of melanocyte stem cells. This process is accelerated dramatically with Bcl2 deficiency, which causes selective apoptosis of melanocyte stem cells, but not of differentiated melanocytes, within the niche at their entry into the dormant state. Furthermore, physiologic aging of melanocyte stem cells was associated with ectopic pigmentation or differentiation within the niche, a process accelerated by mutation of the melanocyte master transcriptional regulator Mitf.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nishimura, Emi K -- Granter, Scott R -- Fisher, David E -- AR43369/AR/NIAMS NIH HHS/ -- New York, N.Y. -- Science. 2005 Feb 4;307(5710):720-4. Epub 2004 Dec 23.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pediatric Hematology/Oncology, Melanoma Program in Medical Oncology, Dana-Farber Cancer Institute, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA. emi_k_nishimura@yahoo.co.jp〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15618488" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Aged ; Aged, 80 and over ; Aging/*physiology ; Animals ; Apoptosis ; Cell Differentiation ; Cell Shape ; DNA-Binding Proteins/genetics/metabolism ; *Hair Color ; Hair Follicle/cytology/*physiology ; Humans ; Melanins/biosynthesis ; Melanocytes/*physiology ; Mice ; Mice, Inbred C57BL ; Mice, Transgenic ; Microphthalmia-Associated Transcription Factor ; Middle Aged ; Morphogenesis ; Proto-Oncogene Proteins/genetics/metabolism ; Proto-Oncogene Proteins c-bcl-2 ; Stem Cells/*physiology ; Transcription Factors/genetics/metabolism ; Vibrissae/cytology/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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  • 16
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    Stopping the spread of drug-resistant malaria (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-12-21
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Okeke, Iruka N -- New York, N.Y. -- Science. 2004 Dec 17;306(5704):2039-40; author reply 2039-40.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15609423" target="_blank"〉PubMed〈/a〉
    Keywords: Africa ; Animals ; Antimalarials/*pharmacology/therapeutic use ; Asia ; Communicable Disease Control/*methods ; Drug Resistance ; Humans ; Malaria, Falciparum/*parasitology/*prevention & control/transmission ; Mass Screening ; Plasmodium falciparum/*drug effects ; Pyrimethamine/pharmacology/therapeutic use ; Travel
    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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  • 17
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    Breakthrough of the year. Areas to watch in 2005 (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-12-18
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉New York, N.Y. -- Science. 2004 Dec 17;306(5704):2014.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15604369" target="_blank"〉PubMed〈/a〉
    Keywords: Anti-Obesity Agents/therapeutic use ; Autophagy ; Europe ; Haplotypes ; Humans ; Nanotechnology/standards ; Nuclear Warfare ; Research ; Saturn ; *Science
    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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  • 18
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    Influenza. WHO adds more "1918" to pandemic predictions (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-12-18
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Enserink, Martin -- New York, N.Y. -- Science. 2004 Dec 17;306(5704):2025.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15604380" target="_blank"〉PubMed〈/a〉
    Keywords: Centers for Disease Control and Prevention (U.S.) ; Disease Outbreaks/*statistics & numerical data ; Forecasting ; *Global Health ; Humans ; Influenza Vaccines ; Influenza, Human/*mortality/transmission/virology ; Orthomyxoviridae/pathogenicity ; United States ; Virulence ; *World Health Organization
    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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  • 19
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    Phosphorylation of proteins by inositol pyrophosphates (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-12-18
    Description: The inositol pyrophosphates IP7 and IP8 contain highly energetic pyrophosphate bonds. Although implicated in various biologic functions, their molecular sites of action have not been clarified. Using radiolabeled IP7, we detected phosphorylation of multiple eukaryotic proteins. We also observed phosphorylation of endogenous proteins by endogenous IP7 in yeast. Phosphorylation by IP7 is nonenzymatic and may represent a novel intracellular signaling mechanism.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Saiardi, Adolfo -- Bhandari, Rashna -- Resnick, Adam C -- Snowman, Adele M -- Snyder, Solomon H -- DA00074/DA/NIDA NIH HHS/ -- MH068830-02/MH/NIMH NIH HHS/ -- MH18501/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 2004 Dec 17;306(5704):2101-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neuroscience, Johns Hopkins University, School of Medicine, 725 North Wolfe Street, Baltimore, MD 21205, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15604408" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphate/metabolism ; Amino Acid Sequence ; Amino Acid Substitution ; Animals ; Drosophila Proteins/metabolism ; Drosophila melanogaster ; Escherichia coli Proteins/metabolism ; Humans ; Inositol Phosphates/*metabolism ; Kinetics ; Magnesium/metabolism ; Mice ; Molecular Sequence Data ; Mutation ; Nuclear Proteins/chemistry/*metabolism ; Phosphates/metabolism ; Phosphorylation ; Phosphotransferases (Phosphate Group Acceptor)/metabolism ; Protein Kinases/genetics/metabolism ; Proteins/*metabolism ; RNA-Binding Proteins/chemistry/*metabolism ; Saccharomyces cerevisiae/metabolism ; Saccharomyces cerevisiae Proteins/chemistry/*metabolism ; Serine/metabolism ; Signal Transduction ; Temperature
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
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  • 20
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    bHLH transcription factor Olig1 is required to repair demyelinated lesions in the CNS (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-12-18
    Description: Olig1 and Olig2 are closely related basic helix-loop-helix (bHLH) transcription factors that are expressed in myelinating oligodendrocytes and their progenitor cells in the developing central nervous system (CNS). Olig2 is necessary for the specification of oligodendrocytes, but the biological functions of Olig1 during oligodendrocyte lineage development are poorly understood. We show here that Olig1 function in mice is required not to develop the brain but to repair it. Specifically, we demonstrate a genetic requirement for Olig1 in repairing the types of lesions that occur in patients with multiple sclerosis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Arnett, Heather A -- Fancy, Stephen P J -- Alberta, John A -- Zhao, Chao -- Plant, Sheila R -- Kaing, Sovann -- Raine, Cedric S -- Rowitch, David H -- Franklin, Robin J M -- Stiles, Charles D -- 689/Multiple Sclerosis Society/United Kingdom -- NS08952/NS/NINDS NIH HHS/ -- NS11920/NS/NINDS NIH HHS/ -- NS4051/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 2004 Dec 17;306(5704):2111-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15604411" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Newborn ; Basic Helix-Loop-Helix Transcription Factors ; Brain/growth & development/*physiology ; Cell Nucleus/metabolism ; Cuprizone/pharmacology ; Cytoplasm/metabolism ; DNA-Binding Proteins/genetics/*metabolism ; Demyelinating Diseases/*physiopathology ; Ethidium/pharmacology ; Humans ; Lysophosphatidylcholines/pharmacology ; Mice ; Mice, Inbred C57BL ; Multiple Sclerosis/physiopathology ; Myelin Sheath/*physiology ; Nerve Tissue Proteins/genetics/*metabolism/physiology ; Oligodendroglia/*physiology ; Rats ; Rats, Sprague-Dawley ; Spinal Cord/growth & development/*physiology ; Stem Cells/physiology ; Transcription Factors/genetics/*metabolism
    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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