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  • American Association for the Advancement of Science (AAAS)  (10)
  • American Chemical Society  (7)
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  • 1
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    Microglial activation resulting from CD40-CD40L interaction after beta-amyloid stimulation (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-22
    Description: Alzheimer's disease (AD) has a substantial inflammatory component, and activated microglia may play a central role in neuronal degeneration. CD40 expression was increased on cultured microglia treated with freshly solublized amyloid-beta (Abeta, 500 nanomolar) and on microglia from a transgenic murine model of AD (Tg APPsw). Increased tumor necrosis factor alpha production and induction of neuronal injury occurred when Abeta-stimulated microglia were treated with CD40 ligand (CD40L). Microglia from Tg APPsw mice deficient for CD40L demonstrated reduction in activation, suggesting that the CD40-CD40L interaction is necessary for Abeta-induced microglial activation. Finally, abnormal tau phosphorylation was reduced in Tg APPsw animals deficient for CD40L, suggesting that the CD40-CD40L interaction is an early event in AD pathogenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tan, J -- Town, T -- Paris, D -- Mori, T -- Suo, Z -- Crawford, F -- Mattson, M P -- Flavell, R A -- Mullan, M -- New York, N.Y. -- Science. 1999 Dec 17;286(5448):2352-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Roskamp Institute, University of South Florida, 3515 East Fletcher Avenue, Tampa, FL 33613, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10600748" target="_blank"〉PubMed〈/a〉
    Keywords: Alzheimer Disease/metabolism ; Amyloid beta-Peptides/*metabolism/pharmacology ; Animals ; Antigens, CD40/biosynthesis/*metabolism ; CD40 Ligand ; Cell Death ; Cells, Cultured ; Interferon-gamma/pharmacology ; Interleukins/pharmacology ; Ligands ; Membrane Glycoproteins/*metabolism/pharmacology ; Mice ; Mice, Transgenic ; Microglia/cytology/immunology/*metabolism ; Neurons/cytology ; Peptide Fragments/pharmacology ; Phosphorylation ; Signal Transduction ; Tumor Necrosis Factor-alpha/biosynthesis/pharmacology ; tau Proteins/metabolism
    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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    Carbon dioxide degassing by advective flow from Usu volcano, Japan (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-04-09
    Description: Magmatic carbon dioxide (CO2) degassing has been documented before the 31 March 2000 eruption of Usu volcano, Hokkaido, Japan. Six months before the eruption, an increase in CO2 flux was detected on the summit caldera, from 120 (September 1998) to 340 metric tons per day (September 1999), followed by a sudden decrease to 39 metric tons per day in June 2000, 3 months after the eruption. The change in CO2 flux and seismic observations suggests that before the eruption, advective processes controlled gas migration toward the surface. The decrease in flux after the eruption at the summit caldera could be due to a rapid release of CO2 during the eruption from ascending dacitic dikes spreading away from the magma chamber beneath the caldera.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hernandez, P A -- Notsu, K -- Salazar, J M -- Mori, T -- Natale, G -- Okada, H -- Virgili, G -- Shimoike, Y -- Sato, M -- Perez, N M -- New York, N.Y. -- Science. 2001 Apr 6;292(5514):83-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory for Earthquake Chemistry, Graduate School of Science, University of Tokyo, Bunkyo-Ku 113-0033, Tokyo, Japan. phdez@iter.rcanaria.es〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11292867" target="_blank"〉PubMed〈/a〉
    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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    Circadian rhythms in rapidly dividing cyanobacteria (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-01-10
    Description: The long-standing supposition that the biological clock cannot function in cells that divide more rapidly than the circadian cycle was investigated. During exponential growth in which the generation time was 10 hours, the profile of bioluminescence from a reporter strain of the cyanobacterium Synechococcus (species PCC 7942) matched a model based on the assumption that cells proliferate exponentially and the bioluminescence of each cell oscillates in a cosine fashion. Some messenger RNAs showed a circadian rhythm in abundance during continuous exponential growth with a doubling time of 5 to 6 hours. Thus, the cyanobacterial circadian clock functions in cells that divide three or more times during one circadian cycle.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kondo, T -- Mori, T -- Lebedeva, N V -- Aoki, S -- Ishiura, M -- Golden, S S -- New York, N.Y. -- Science. 1997 Jan 10;275(5297):224-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Biological Science, Graduate School of Science, Nagoya University, Chikusa, Nagoya, 464-01 Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8985018" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Division ; *Circadian Rhythm ; Cyanobacteria/cytology/genetics/growth & development/*physiology ; Genes, Reporter ; Luciferases/genetics/metabolism ; Luminescence ; Mutation ; Photosynthetic Reaction Center Complex Proteins/genetics ; Photosystem II Protein Complex ; RNA, Bacterial/genetics/metabolism ; RNA, Messenger/genetics/metabolism ; Transformation, Bacterial
    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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    OPC-21268, an orally effective, nonpeptide vasopressin V1 receptor antagonist (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-04-26
    Description: An orally effective, nonpeptide, vasopressin V1 receptor antagonist, OPC-21268, has been identified. This compound selectively antagonized binding to the V1 subtype of the vasopressin receptor in a competitive manner. In vivo, the compound acted as a specific antagonist of arginine vasopressin (AVP)-induced vasoconstriction. After oral administration in conscious rats, the compound also antagonized pressor responses to AVP. OPC-21268 can be used to study the physiological role of AVP and may be therapeutically useful in the treatment of hypertension and congestive heart failure.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yamamura, Y -- Ogawa, H -- Chihara, T -- Kondo, K -- Onogawa, T -- Nakamura, S -- Mori, T -- Tominaga, M -- Yabuuchi, Y -- New York, N.Y. -- Science. 1991 Apr 26;252(5005):572-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Second Tokushima Institute of New Drug Research, Otsuka Pharmaceutical Co., Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1850553" target="_blank"〉PubMed〈/a〉
    Keywords: Administration, Oral ; Angiotensin II/pharmacology ; Animals ; Arginine Vasopressin/antagonists & inhibitors/metabolism/*pharmacology ; Binding, Competitive ; Blood Pressure/*drug effects ; Cell Membrane/metabolism ; Kidney/metabolism ; Kinetics ; Liver/metabolism ; Norepinephrine/pharmacology ; Piperidines/administration & dosage/*pharmacology ; Quinolones/administration & dosage/*pharmacology ; Rats ; Receptors, Angiotensin/*drug effects/metabolism ; Receptors, Vasopressin ; 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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  • 5
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    A human gene responsible for Zellweger syndrome that affects peroxisome assembly (1992)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1992-02-28
    Description: The primary defect arising from Zellweger syndrome appears to be linked to impaired assembly of peroxisomes. A human complementary DNA has been cloned that complements the disease's symptoms (including defective peroxisome assembly) in fibroblasts from a patient with Zellweger syndrome. The cause of the syndrome in this patient was a point mutation that resulted in the premature termination of peroxisome assembly factor-1. The homozygous patient apparently inherited the mutation from her parents, each of whom was heterozygous for that mutation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shimozawa, N -- Tsukamoto, T -- Suzuki, Y -- Orii, T -- Shirayoshi, Y -- Mori, T -- Fujiki, Y -- New York, N.Y. -- Science. 1992 Feb 28;255(5048):1132-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pediatrics, Gifu University School of Medicine, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1546315" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Cricetinae ; DNA Mutational Analysis ; Genes ; Genetic Complementation Test ; Humans ; Membrane Proteins/*genetics ; Microbodies/*ultrastructure ; Molecular Sequence Data ; Oligodeoxyribonucleotides/chemistry ; Pedigree ; Polymerase Chain Reaction ; Transfection ; Zellweger Syndrome/*genetics
    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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    Comment on "The Arabidopsis circadian clock incorporates a cADPR-based feedback loop" (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-10-10
    Description: Dodd et al. (Reports, 14 December 2007, p. 1789) reported that the Arabidopsis circadian clock incorporates the signaling molecule cyclic adenosine diphosphate ribose (cADPR). In contrast, we found that there is no rhythm of cADPR levels nor are there any significant effects on the rhythm by cADPR overexpression, thus raising questions about the conclusions of Dodd et al.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2934760/" 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/PMC2934760/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Xu, Xiaodong -- Graeff, Richard -- Xie, Qiguang -- Gamble, Karen L -- Mori, Tetsuya -- Johnson, Carl Hirschie -- GM061568/GM/NIGMS NIH HHS/ -- K99 GM086683/GM/NIGMS NIH HHS/ -- K99 GM086683-01/GM/NIGMS NIH HHS/ -- MH043836/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 2009 Oct 9;326(5950):230; author reply 230. doi: 10.1126/science.1169503.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biological Sciences, Vanderbilt University, Nashville, TN 37235, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19815758" target="_blank"〉PubMed〈/a〉
    Keywords: ADP-ribosyl Cyclase/metabolism ; Arabidopsis/drug effects/metabolism/*physiology ; Calcium/*metabolism ; *Circadian Rhythm ; Cyclic ADP-Ribose/*metabolism ; Estradiol/pharmacology ; *Feedback, Physiological ; Niacinamide/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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  • 7
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    Circadian rhythms. Atomic-scale origins of slowness in the cyanobacterial circadian clock (2015)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2015-06-27
    Description: Circadian clocks generate slow and ordered cellular dynamics but consist of fast-moving bio-macromolecules; consequently, the origins of the overall slowness remain unclear. We identified the adenosine triphosphate (ATP) catalytic region [adenosine triphosphatase (ATPase)] in the amino-terminal half of the clock protein KaiC as the minimal pacemaker that controls the in vivo frequency of the cyanobacterial clock. Crystal structures of the ATPase revealed that the slowness of this ATPase arises from sequestration of a lytic water molecule in an unfavorable position and coupling of ATP hydrolysis to a peptide isomerization with high activation energy. The slow ATPase is coupled with another ATPase catalyzing autodephosphorylation in the carboxyl-terminal half of KaiC, yielding the circadian response frequency of intermolecular interactions with other clock-related proteins that influences the transcription and translation cycle.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Abe, Jun -- Hiyama, Takuya B -- Mukaiyama, Atsushi -- Son, Seyoung -- Mori, Toshifumi -- Saito, Shinji -- Osako, Masato -- Wolanin, Julie -- Yamashita, Eiki -- Kondo, Takao -- Akiyama, Shuji -- New York, N.Y. -- Science. 2015 Jul 17;349(6245):312-6. doi: 10.1126/science.1261040. Epub 2015 Jun 25.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Research Center of Integrative Molecular Systems (CIMoS), Institute for Molecular Science, 38 Nishigo-Naka, Myodaiji, Okazaki 444-8585, Japan. ; Research Center of Integrative Molecular Systems (CIMoS), Institute for Molecular Science, 38 Nishigo-Naka, Myodaiji, Okazaki 444-8585, Japan. Department of Functional Molecular Science, SOKENDAI (The Graduate University for Advanced Studies), 38 Nishigo-Naka, Myodaiji, Okazaki 444-8585, Japan. ; Division of Biological Science, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan. ; Department of Functional Molecular Science, SOKENDAI (The Graduate University for Advanced Studies), 38 Nishigo-Naka, Myodaiji, Okazaki 444-8585, Japan. Department of Theoretical and Computational Molecular Science, Institute for Molecular Science, 38 Nishigo-Naka, Myodaiji, Okazaki 444-8585, Japan. ; Research Center of Integrative Molecular Systems (CIMoS), Institute for Molecular Science, 38 Nishigo-Naka, Myodaiji, Okazaki 444-8585, Japan. Department of Functional Molecular Science, SOKENDAI (The Graduate University for Advanced Studies), 38 Nishigo-Naka, Myodaiji, Okazaki 444-8585, Japan. Department of Theoretical and Computational Molecular Science, Institute for Molecular Science, 38 Nishigo-Naka, Myodaiji, Okazaki 444-8585, Japan. ; Research Center of Integrative Molecular Systems (CIMoS), Institute for Molecular Science, 38 Nishigo-Naka, Myodaiji, Okazaki 444-8585, Japan. PSL Research University, Chimie ParisTech, 75005 Paris, France. ; Institute for Protein Research, Osaka University, 3-2 Yamada-oka, Suita 565-0871, Japan. ; Research Center of Integrative Molecular Systems (CIMoS), Institute for Molecular Science, 38 Nishigo-Naka, Myodaiji, Okazaki 444-8585, Japan. Department of Functional Molecular Science, SOKENDAI (The Graduate University for Advanced Studies), 38 Nishigo-Naka, Myodaiji, Okazaki 444-8585, Japan. akiyamas@ims.ac.jp.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26113637" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphatases/*chemistry/genetics ; Adenosine Triphosphate/chemistry ; Bacterial Proteins/*chemistry/genetics ; Catalysis ; *Catalytic Domain ; Circadian Clocks/*physiology ; *Circadian Rhythm ; Circadian Rhythm Signaling Peptides and Proteins/*chemistry/genetics ; Crystallography, X-Ray ; Hydrolysis ; Synechococcus/enzymology/*physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
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  • 8
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    Noncovalent assembly. A rational strategy for the realization of chain-growth supramolecular polymerization (2015)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2015-02-07
    Description: Over the past decade, major progress in supramolecular polymerization has had a substantial effect on the design of functional soft materials. However, despite recent advances, most studies are still based on a preconceived notion that supramolecular polymerization follows a step-growth mechanism, which precludes control over chain length, sequence, and stereochemical structure. Here we report the realization of chain-growth polymerization by designing metastable monomers with a shape-promoted intramolecular hydrogen-bonding network. The monomers are conformationally restricted from spontaneous polymerization at ambient temperatures but begin to polymerize with characteristics typical of a living mechanism upon mixing with tailored initiators. The chain growth occurs stereoselectively and therefore enables optical resolution of a racemic monomer.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kang, Jiheong -- Miyajima, Daigo -- Mori, Tadashi -- Inoue, Yoshihisa -- Itoh, Yoshimitsu -- Aida, Takuzo -- New York, N.Y. -- Science. 2015 Feb 6;347(6222):646-51. doi: 10.1126/science.aaa4249.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉RIKEN Center for Emergent Matter Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan. Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan. ; RIKEN Center for Emergent Matter Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan. daigo.miyajima@riken.jp aida@macro.t.u-tokyo.ac.jp. ; Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan. ; Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan. ; RIKEN Center for Emergent Matter Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan. Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan. daigo.miyajima@riken.jp aida@macro.t.u-tokyo.ac.jp.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25657246" target="_blank"〉PubMed〈/a〉
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  • 9
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    A primordial and reversible TCA cycle in a facultatively chemolithoautotrophic thermophile (2018)
    American Association for the Advancement of Science (AAAS)
    In: Science
    Details
    Publication Date: 2018-02-03
    Description: Inorganic carbon fixation is essential to sustain life on Earth, and the reductive tricarboxylic acid (rTCA) cycle is one of the most ancient carbon fixation metabolisms. A combination of genomic, enzymatic, and metabolomic analyses of a deeply branching chemolithotrophic Thermosulfidibacter takaii ABI70S6 T revealed a previously unknown reversible TCA cycle whose direction was controlled by the available carbon source(s). Under a chemolithoautotrophic condition, a rTCA cycle occurred with the reverse reaction of citrate synthase (CS) and not with the adenosine 5'-triphosphate–dependent citrate cleavage reactions that had been regarded as essential for the conventional rTCA cycle. Phylometabolic evaluation suggests that the TCA cycle with reversible CS may represent an ancestral mode of the rTCA cycle and raises the possibility of a facultatively chemolithomixotrophic origin of life.
    Keywords: Biochemistry, Microbiology
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    Topics: Biology , Chemistry and Pharmacology , Geosciences , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 10
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    Unique Crystal Structure and Anomalous Magnetic Behavior of Quaternary U2ScB6C3 (2008)
    American Chemical Society
    Details
    Publication Date: 2008-09-09
    Print ISSN: 0897-4756
    Electronic ISSN: 1520-5002
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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