Institution
Kumamoto University
Education•Kumamoto, Kumamoto, Japan•
About: Kumamoto University is a education organization based out in Kumamoto, Kumamoto, Japan. It is known for research contribution in the topics: Population & Cancer. The organization has 19602 authors who have published 35513 publications receiving 901260 citations. The organization is also known as: Kumamoto Daigaku.
Topics: Population, Cancer, Cell culture, Stem cell, Cellular differentiation
Papers published on a yearly basis
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TL;DR: In this article, the photoreactions similar to photocatalytic reactions in which H2 and CO2 are evolved from an aqueous suspension of GO nanosheets under UV irradiation were reported.
Abstract: Graphene oxide (GO) nanosheets have many semiconducting π-conjugated sp2 domains of various sizes within an oxygenated sp3 domain. The chemical and physical properties, therefore, can be widely tuned by adjusting the degree of oxidation through photoreaction, because the semiconducting domains act as a semiconducting photocatalyst when irradiated with light of energy exceeding the band gap of the domains. In this paper, we report new photoreactions similar to photocatalytic reactions in which H2 and CO2 are evolved from an aqueous suspension of GO nanosheets under UV irradiation; these reactions are based on the photoreactions of oxygen-containing functional groups and carbon. As a result, reduced GO (rGO) nanosheets with many holes and defects were produced. We conjecture that some carbons in the holes belong to zigzag edges, CH bonds, or both and that the rGO nanosheets therefore have ferromagnetic properties. In photoelectrochemical measurements of a GO nanosheet electrode, a large anodic photocurrent ...
230 citations
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TL;DR: Homology search revealed that an approximately 200-amino-acid domain in the ftsH1(Ts) gene is highly homologous to the domain found in members of a novel, eukaryotic family of putative ATPases, e.g., Sec18p, Pas1p, CDC48p, and TBP-1, which function in protein transport pathways, peroxisome assembly, cell division cycle, and gene expression, respectively.
Abstract: The ftsH gene is essential for cell viability in Escherichia coli. We cloned and sequenced the wild-type ftsH gene and the temperature-sensitive ftsH1(Ts) gene. It was suggested that FtsH protein was an integral membrane protein of 70.7 kDa (644 amino acid residues) with a putative ATP-binding domain. The ftsH1(Ts) gene was found to have two base substitutions within the coding sequence corresponding to the amino acid substitutions Glu-463 by Lys and Pro-587 by Ala. Homology search revealed that an approximately 200-amino-acid domain, including the putative ATP-binding sequence, is highly homologous (35 to 48% identical) to the domain found in members of a novel, eukaryotic family of putative ATPases, e.g., Sec18p, Pas1p, CDC48p, and TBP-1, which function in protein transport pathways, peroxisome assembly, cell division cycle, and gene expression, respectively. Possible implications of these observations are discussed.
230 citations
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TL;DR: Results strongly suggest that u.v.-induced nuclear accumulation of p53 is evoked through DNA damage of actively transcribed genes, which is related to DNA repair capacity.
Abstract: Induction of p53 in u.v.-irradiated primary human fibroblasts was monitored by immunostaining and Western blotting. Minimum u.v. doses required for induction of nuclear accumulation of p53 (minimum response dose: MRD) were estimated in various cells with different DNA repair capacities. The MRD in repair deficient xeroderma pigmentosum (XP) group A cells is eightfold lower than in normal cells, indicating that nuclear accumulation of p53 is related to DNA repair capacity. Cells from patients with another u.v.-sensitive disorder, Cockayne syndrome (CS), which have normal repair capacity for the overall genome but have a specific defect in preferential repair of lesions in active genes, have the same low MRD as of XP-A cells. Furthermore, the MRD in XP-C cells, which have normal preferential repair but have defects in overall genome repair, is as high as that of normal cells. DNA damage induced by X-ray is repaired at similar rates in normal, XP and CS cells. In contrast to u.v.-irradiation, the minimum dose of X-rays that induces nuclear accumulation of p53 is the same in these cells. Inhibition of transcription with alpha-amanitin evokes nuclear accumulation of p53 both in normal cells and in XP cells. These results strongly suggest that u.v.-induced nuclear accumulation of p53 is evoked through DNA damage of actively transcribed genes. Nuclear accumulation of p53 is observed in any phase of the cell cycle at both low and high u.v. doses.
229 citations
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Harvard University1, University of Miami2, University of Naples Federico II3, Tel Aviv University4, Our Lady's Children's Hospital5, University of Minnesota6, Medical College of Wisconsin7, Nagasaki University8, University of Michigan9, University of Washington10, Kumamoto University11, University of Groningen12, University of New Mexico13, Emory University14, University of Chile15, University of Pennsylvania16, University of Toronto17, Hacettepe University18, University of Arkansas at Little Rock19, Martin Luther University of Halle-Wittenberg20, Baylor College of Medicine21, Goethe University Frankfurt22, University of Leicester23, University of Melbourne24, St. John's University25, Cleveland Clinic26, University of Turin27, University of Illinois at Chicago28, University of California, Los Angeles29
TL;DR: It is shown that individuals with CFEOM1 harbor heterozygous missense mutations in a kinesin motor protein encoded by Kif21A, highlighting an important new role for KIF21A and its stalk in the formation of the oculomotor axis.
Abstract: Congenital fibrosis of the extraocular muscles type 1 (CFEOM1; OMIM #135700) is an autosomal dominant strabismus disorder associated with defects of the oculomotor nerve. We show that individuals with CFEOM1 harbor heterozygous missense mutations in a kinesin motor protein encoded by KIF21A. We identified six different mutations in 44 of 45 probands. The primary mutational hotspots are in the stalk domain, highlighting an important new role for KIF21A and its stalk in the formation of the oculomotor axis.
229 citations
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TL;DR: Six different polyphenolic compounds were identified and quantified by NMR, FABMS, and RPHPLC analysis procedures and are reported on in what is the first report ofpolyphenolic compositions in sweetpotato leaves.
Abstract: Trials over two years were conducted using 1389 sweetpotato (Ipomoea batatas L.) genotypes collected from all over the world to characterize the polyphenolic composition in sweetpotato leaves. Wide variation was observed in relation to their total and individual leaf polyphenolic constituents. In all genotypes studied, the total polyphenol contents of sweetpotato leaf ranged from 1.42 to 17.1 g/100 g dry weight. The six different polyphenolic compounds were identified and quantified by NMR, FABMS, and RPHPLC analysis procedures. This is the first report of polyphenolic compositions in sweetpotato leaves. The relative levels of polyphenolic acids in sweetpotato leaves were as follows: 3,5-di-O-caffeoylquinic acid > 4,5-di-O-caffeoylquinic acid > chlorogenic acid (3-O-caffeoylquinic acid) > 3,4-di-O-caffeoylquinic acid > 3,4,5-tri-O-caffeoylquinic acid > caffeic acid. The highest 3,4,5-tri-O-caffeoylquinic acid and 4,5-di-O-caffeoylquinic acid occurred at 221 and 1183.30 mg/100 g dry weight, respectively. ...
228 citations
Authors
Showing all 19645 results
Name | H-index | Papers | Citations |
---|---|---|---|
Fred H. Gage | 216 | 967 | 185732 |
George D. Yancopoulos | 158 | 496 | 93955 |
Kenji Kangawa | 153 | 1117 | 110059 |
Tasuku Honjo | 141 | 712 | 88428 |
Hideo Yagita | 137 | 946 | 70623 |
Masashi Yanagisawa | 130 | 524 | 83631 |
Kazuwa Nakao | 128 | 1041 | 70812 |
Kouji Matsushima | 124 | 590 | 56995 |
Thomas E. Mallouk | 122 | 549 | 52593 |
Toshio Hirano | 120 | 401 | 55721 |
Eisuke Nishida | 112 | 349 | 45918 |
Hiroaki Shimokawa | 111 | 949 | 48822 |
Bernd Bukau | 111 | 271 | 38446 |
Kazuo Tsubota | 105 | 1379 | 48991 |
Toshio Suda | 104 | 580 | 41069 |