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  • Male  (6)
  • American Association for the Advancement of Science (AAAS)  (6)
  • International Union of Crystallography
  • International Union of Crystallography (IUCr)
  • 1995-1999  (6)
Collection
Keywords
Publisher
  • American Association for the Advancement of Science (AAAS)  (6)
  • International Union of Crystallography
  • International Union of Crystallography (IUCr)
Years
Year
  • 1
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    Impaired B cell development and proliferation in absence of phosphoinositide 3-kinase p85alpha (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-01-15
    Description: Phosphoinositide 3-kinase (PI3K) activation has been implicated in many cellular responses, including fibroblast growth, transformation, survival, and chemotaxis. Although PI3K is activated by several agents that stimulate T and B cells, the role of PI3K in lymphocyte function is not clear. The mouse gene encoding the PI3K adapter subunit p85alpha and its splice variants p55alpha and p50alpha was disrupted. Most p85alpha-p55alpha-p50alpha-/- mice die within days after birth. Lymphocyte development and function was studied with the use of the RAG2-deficient blastocyst complementation system. Chimeric mice had reduced numbers of peripheral mature B cells and decreased serum immunoglobulin. The B cells that developed had diminished proliferative responses to antibody to immunoglobulin M, antibody to CD40, and lipopolysaccharide stimulation and decreased survival after incubation with interleukin-4. In contrast, T cell development and proliferation was normal. This phenotype is similar to defects observed in mice lacking the tyrosine kinase Btk.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fruman, D A -- Snapper, S B -- Yballe, C M -- Davidson, L -- Yu, J Y -- Alt, F W -- Cantley, L C -- R01 GM041890/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1999 Jan 15;283(5400):393-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Signal Transduction, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA. dfruman@bidmc.harvard.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9888855" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD45/analysis ; Apoptosis ; B-Lymphocytes/cytology/enzymology/*immunology ; Catalytic Domain ; Cell Cycle ; Chimera ; Chromones/pharmacology ; Enzyme Inhibitors/pharmacology ; Female ; Gene Targeting ; Immunoglobulins/*blood ; *Lymphocyte Activation ; Lymphocyte Count ; Male ; Mice ; Mice, Inbred C57BL ; Morpholines/pharmacology ; Phosphatidylinositol 3-Kinases/antagonists & inhibitors/genetics/*metabolism ; Protein-Tyrosine Kinases/genetics/metabolism ; Spleen/immunology ; T-Lymphocytes/cytology/enzymology/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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    Frameshift mutants of beta amyloid precursor protein and ubiquitin-B in Alzheimer's and Down patients (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-01-31
    Description: The cerebral cortex of Alzheimer's and Down syndrome patients is characterized by the presence of protein deposits in neurofibrillary tangles, neuritic plaques, and neuropil threads. These structures were shown to contain forms of beta amyloid precursor protein and ubiquitin-B that are aberrant (+1 proteins) in the carboxyl terminus. The +1 proteins were not found in young control patients, whereas the presence of ubiquitin-B+1 in elderly control patients may indicate early stages of neurodegeneration. The two species of +1 proteins displayed cellular colocalization, suggesting a common origin, operating at the transcriptional level or by posttranscriptional editing of RNA. This type of transcript mutation is likely an important factor in the widely occurring nonfamilial early- and late-onset forms of Alzheimer's disease.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉van Leeuwen, F W -- de Kleijn, D P -- van den Hurk, H H -- Neubauer, A -- Sonnemans, M A -- Sluijs, J A -- Koycu, S -- Ramdjielal, R D -- Salehi, A -- Martens, G J -- Grosveld, F G -- Peter, J -- Burbach, H -- Hol, E M -- New York, N.Y. -- Science. 1998 Jan 9;279(5348):242-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Graduate School for Neurosciences Amsterdam, Netherlands Institute for Brain Research, 1105 AZ Amsterdam, The Netherlands. f.van.leeuwen@nih.knaw.nl〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9422699" target="_blank"〉PubMed〈/a〉
    Keywords: Aged ; Aging/genetics ; Alzheimer Disease/*genetics/metabolism/pathology ; Amino Acid Sequence ; Amyloid beta-Protein Precursor/analysis/chemistry/*genetics ; Base Sequence ; *Brain Chemistry ; Cerebral Cortex/chemistry/pathology ; Cloning, Molecular ; Down Syndrome/*genetics/metabolism/pathology ; Female ; *Frameshift Mutation ; Hippocampus/chemistry/pathology ; Humans ; Male ; Molecular Sequence Data ; Neurites/chemistry ; Neurofibrillary Tangles/chemistry ; Neuropil/chemistry ; Polymerase Chain Reaction ; RNA Editing ; Repetitive Sequences, Nucleic Acid ; Sequence Deletion ; Transcription, Genetic ; Ubiquitins/analysis/chemistry/*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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  • 3
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    Prevention of vascular and neural dysfunction in diabetic rats by C-peptide (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-07-25
    Description: C-peptide, a cleavage product from the processing of proinsulin to insulin, has been considered to possess little if any biological activity other than its participation in insulin synthesis. Injection of human C-peptide prevented or attenuated vascular and neural (electrophysiological) dysfunction and impaired Na+- and K+-dependent adenosine triphosphate activity in tissues of diabetic rats. Nonpolar amino acids in the midportion of the peptide were required for these biological effects. Synthetic reverse sequence (retro) and all-D-amino acid (enantio) C-peptides were equipotent to native C-peptide, which indicates that the effects of C-peptide on diabetic vascular and neural dysfunction were mediated by nonchiral interactions instead of stereospecific receptors or binding sites.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ido, Y -- Vindigni, A -- Chang, K -- Stramm, L -- Chance, R -- Heath, W F -- DiMarchi, R D -- Di Cera, E -- Williamson, J R -- EY 06600/EY/NEI NIH HHS/ -- HL 39934/HL/NHLBI NIH HHS/ -- HL 58141/HL/NHLBI NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1997 Jul 25;277(5325):563-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉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/9228006" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Blood Circulation/drug effects ; Blood Glucose/metabolism ; C-Peptide/*chemistry/pharmacology/*therapeutic use ; Capillary Permeability/drug effects ; Circular Dichroism ; Diabetes Mellitus, Experimental/drug therapy/physiopathology ; Diabetic Angiopathies/*prevention & control ; Diabetic Neuropathies/*prevention & control ; Humans ; Male ; Molecular Sequence Data ; Neural Conduction/drug effects ; Peptide Fragments/pharmacology ; Protein Structure, Secondary ; Rats ; Rats, Sprague-Dawley ; Sodium-Potassium-Exchanging ATPase/metabolism ; Stereoisomerism
    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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  • 4
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    Brain activation modulated by sentence comprehension (1996)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1996-10-04
    Description: The comprehension of visually presented sentences produces brain activation that increases with the linguistic complexity of the sentence. The volume of neural tissue activated (number of voxels) during sentence comprehension was measured with echo-planar functional magnetic resonance imaging. The modulation of the volume of activation by sentence complexity was observed in a network of four areas: the classical left-hemisphere language areas (the left laterosuperior temporal cortex, or Wernicke's area, and the left inferior frontal gyrus, or Broca's area) and their homologous right-hemisphere areas, although the right areas had much smaller volumes of activation than did the left areas. These findings generally indicate that the amount of neural activity that a given cognitive process engenders is dependent on the computational demand that the task imposes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Just, M A -- Carpenter, P A -- Keller, T A -- Eddy, W F -- Thulborn, K R -- MH-00662/MH/NIMH NIH HHS/ -- MH-19102/MH/NIMH NIH HHS/ -- MH-29617/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1996 Oct 4;274(5284):114-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Psychology, Carnegie Mellon University, Pittsburgh, PA 15213, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8810246" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; Adult ; *Brain Mapping ; Cognition/*physiology ; Dominance, Cerebral ; Female ; Frontal Lobe/anatomy & histology/*physiology ; Humans ; Language Tests ; Magnetic Resonance Imaging ; Male ; Temporal Lobe/anatomy & histology/*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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  • 5
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    Polyclonal origin of colonic adenomas in an XO/XY patient with FAP (1996)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1996-05-24
    Description: It is widely accepted that tumors are monoclonal in origin, arising from a mutation or series of mutations in a single cell and its descendants. The clonal origin of colonic adenomas and uninvolved intestinal mucosa from an XO/XY mosaic individual with familial adenomatous polyposis (FAP) was examined directly by in situ hybridization with Y chromosome probes. In this patient, the crypts of the small and large intestine were clonal, but at least 76 percent of the microadenomas were polyclonal in origin.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Novelli, M R -- Williamson, J A -- Tomlinson, I P -- Elia, G -- Hodgson, S V -- Talbot, I C -- Bodmer, W F -- Wright, N A -- New York, N.Y. -- Science. 1996 May 24;272(5265):1187-90.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cancer Genetics Laboratory, Imperial Cancer Research Fund (ICRF) Laboratories, London, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8638166" target="_blank"〉PubMed〈/a〉
    Keywords: Adenomatous Polyposis Coli/*genetics/pathology ; Adult ; Clone Cells ; Colon/*pathology ; DNA Probes ; Genotype ; Humans ; Ileum/pathology ; In Situ Hybridization ; In Situ Hybridization, Fluorescence ; Intestinal Mucosa/*pathology ; Karyotyping ; Male ; *Mosaicism ; Phenotype ; Y Chromosome
    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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    Amelioration of vascular dysfunctions in diabetic rats by an oral PKC beta inhibitor (1996)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1996-05-03
    Description: The vascular complications of diabetes mellitus have been correlated with enhanced activation of protein kinase C (PKC). LY333531, a specific inhibitor of the beta isoform of PKC, was synthesized and was shown to be a competitive reversible inhibitor of PKC beta 1 and beta 2, with a half-maximal inhibitory constant of approximately 5 nM; this value was one-fiftieth of that for other PKC isoenzymes and one-thousandth of that for non-PKC kinases. When administered orally, LY333531 ameliorated the glomerular filtration rate, albumin excretion rate, and retinal circulation in diabetic rats in a dose-responsive manner, in parallel with its inhibition of PKC activities.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ishii, H -- Jirousek, M R -- Koya, D -- Takagi, C -- Xia, P -- Clermont, A -- Bursell, S E -- Kern, T S -- Ballas, L M -- Heath, W F -- Stramm, L E -- Feener, E P -- King, G L -- DK36836/DK/NIDDK NIH HHS/ -- EY05110-11/EY/NEI NIH HHS/ -- New York, N.Y. -- Science. 1996 May 3;272(5262):728-31.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Research Division, Joslin Diabetes Center, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02215, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8614835" target="_blank"〉PubMed〈/a〉
    Keywords: Administration, Oral ; Albuminuria/prevention & control ; Animals ; Diabetes Mellitus, Experimental/*complications/enzymology/physiopathology ; Diabetic Angiopathies/enzymology/etiology/*prevention & control ; Diglycerides/metabolism ; Dose-Response Relationship, Drug ; Enzyme Activation ; Enzyme Inhibitors/chemistry/*pharmacology ; Glomerular Filtration Rate/drug effects ; Humans ; Indoles/administration & dosage/chemistry/*pharmacology ; Isoenzymes/*antagonists & inhibitors/metabolism ; Kidney Glomerulus/metabolism ; Male ; Maleimides/administration & dosage/chemistry/*pharmacology ; Muscle, Smooth, Vascular/enzymology ; Phosphorylation/drug effects ; Protein Kinase C/*antagonists & inhibitors/metabolism ; Protein Kinase C beta ; Rats ; Rats, Sprague-Dawley ; Regional Blood Flow/drug effects ; Renal Plasma Flow/drug effects ; Retina/metabolism ; Retinal Vessels/physiopathology ; Substrate Specificity
    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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