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  • 1
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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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  • 2
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    Thymocyte development in the absence of pre-T cell receptor extracellular immunoglobulin domains (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-05-23
    Description: Immature thymocytes express a pre-T cell receptor (pre-TCR) composed of the TCRbeta chain paired with pre-Talpha. Signals from this receptor are essential for passage of thymocytes through a key developmental checkpoint in the thymus. These signals were efficiently delivered in vivo by a truncated form of the murine pre-TCR that lacked all of its extracellular immunoglobulin domains. De novo expression of the truncated pre-TCR or an intact alphabetaTCR was sufficient to activate characteristic TCR signaling pathways in a T cell line. These findings support the view that recognition of an extracellular ligand is not required for pre-TCR function.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Irving, B A -- Alt, F W -- Killeen, N -- New York, N.Y. -- Science. 1998 May 8;280(5365):905-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology and Immunology, University of California, San Francisco, CA 94143-0414, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9572735" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD/analysis ; Antigens, CD3/analysis/genetics ; DNA-Binding Proteins/genetics/metabolism ; Dimerization ; Gene Rearrangement, T-Lymphocyte ; Humans ; Immunoglobulins/chemistry ; Immunophenotyping ; Jurkat Cells ; Ligands ; Membrane Glycoproteins/chemistry/genetics/*physiology ; Mice ; Mice, Inbred Strains ; Mice, Transgenic ; NFATC Transcription Factors ; *Nuclear Proteins ; Receptors, Antigen, T-Cell, alpha-beta/chemistry/genetics/*physiology ; Signal Transduction ; T-Lymphocytes/cytology/*immunology/metabolism ; Transcription Factors/genetics/metabolism ; Transfection
    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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    Clean air skepticism (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-10-27
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lipfert, F W -- New York, N.Y. -- Science. 1997 Oct 3;278(5335):19-20.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9340746" target="_blank"〉PubMed〈/a〉
    Keywords: Air Pollution/*adverse effects ; Cohort Studies ; Confounding Factors (Epidemiology) ; Humans ; *Mortality ; 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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  • 4
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    Attomole protein characterization by capillary electrophoresis-mass spectrometry (1996)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1996-08-30
    Description: Electrospray ionization with an ultralow flow rate (〈/=4 nanoliters per minute) was used to directly couple capillary electrophoresis with tandem mass spectrometry for the analysis and identification of biomolecules in mixtures. A Fourier transform mass spectrometer provided full spectra (〉30 kilodaltons) at a resolving power of approximately 60,000 for injections of 0.7 x 10(-18) to 3 x 10(-18) mole of 8- to 29-kilodalton proteins with errors of 〈1 dalton in molecular mass. Using a crude isolate from human blood, a value of 28,780.6 daltons (calculated, 28,780.4 daltons) was measured for carbonic anhydrase, representing 1 percent by weight of the protein in a single red blood cell. Dissociation of molecular ions from 9 x 10(-18) mole of carbonic anhydrase gave nine sequence-specific fragment ions, more data than required for unique retrieval of this enzyme from the protein database.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Valaskovic, G A -- Kelleher, N L -- McLafferty, F W -- 08-T2GM07273/GM/NIGMS NIH HHS/ -- GM16609/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1996 Aug 30;273(5279):1199-202.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry, Baker Laboratory, Cornell University, Ithaca, NY 14853, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8703047" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Carbonic Anhydrases/*analysis/chemistry ; Cattle ; Cytochrome c Group/analysis/chemistry ; Electrophoresis, Capillary/*methods ; Horses ; Humans ; Mass Spectrometry/*methods ; Molecular Weight ; Proteins/*analysis/chemistry ; Sensitivity and Specificity ; Spectroscopy, Fourier Transform Infrared ; Ubiquitins/analysis/chemistry
    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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    Use of NMR to detect water within nonpolar protein cavities (1995)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1995-12-15
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Matthews, B W -- Morton, A G -- Dahlquist, F W -- New York, N.Y. -- Science. 1995 Dec 15;270(5243):1847-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8525384" target="_blank"〉PubMed〈/a〉
    Keywords: Humans ; Interleukin-1/*chemistry ; *Magnetic Resonance Spectroscopy ; Water/*analysis
    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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    Prospects for in utero human gene therapy (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-10-16
    Description: Gene therapy for the treatment of disease in children and adults is being actively pursued at many medical centers. However, a number of genetic disorders result in irreversible damage to the fetus before birth. In these cases, as well as for those with genetic diseases who may benefit from therapy before symptoms are manifested, in utero gene therapy (IUGT) could be beneficial. Although some successes with in utero gene transfer have been reported in animals, significant questions remain to be answered before IUGT clinical trials would be acceptable. This review analyzes the state of the art and delineates the studies that still need to be performed before it would be appropriate to consider human IUGT.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zanjani, E D -- Anderson, W F -- New York, N.Y. -- Science. 1999 Sep 24;285(5436):2084-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Veterans Administration Medical Center, University of Nevada, Reno, NV 89520, USA. zanjani@scs.unr.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10523208" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Female ; Fetal Diseases/*therapy ; *Fetus ; Gene Transfer Techniques ; Genetic Diseases, Inborn/*therapy ; *Genetic Therapy/adverse effects ; Genetic Vectors ; Germ Cells ; Hematopoietic Stem Cell Transplantation ; Hematopoietic Stem Cells/cytology/physiology ; Humans ; Pregnancy
    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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    Biospherian viewpoints (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-02-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dempster, W F -- New York, N.Y. -- Science. 1997 Feb 28;275(5304):1247-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9064774" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arizona ; Atmosphere ; *Ecological Systems, Closed ; *Ecosystem ; Humans
    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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    Tissue optics (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-06-27
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Benaron, D A -- Cheong, W F -- Stevenson, D K -- New York, N.Y. -- Science. 1997 Jun 27;276(5321):2002-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Biomedical Optics Group at the Medical Free Electron Laser Program, Hansen Experimental Physics Laboratory (HEPL), Stanford University, Stanford, CA 94034, USA. benaron@forsythe.stanford.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9221510" target="_blank"〉PubMed〈/a〉
    Keywords: Catheterization/instrumentation ; Esophagus/anatomy & histology ; Fiber Optic Technology ; Humans ; Interferometry/instrumentation ; Light ; Photons ; Scattering, Radiation ; Tomography/instrumentation/*methods
    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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    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
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  • 10
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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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