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大学院理工学研究科 生命科学専攻 生命科学コース |
出身大学院 【 表示 / 非表示 】
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1997年04月-2000年03月
東北大学 薬学研究科 分子生命薬学専攻 博士後期課程 修了
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1995年04月-1997年03月
東北大学 薬学研究科 分子生命薬学専攻 博士前期課程 修了
職務経歴(学外) 【 表示 / 非表示 】
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2016年04月-2021年03月
京都大学 iPS細胞研究所 臨床応用研究部門 特定研究員
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2012年01月-2016年03月
京都大学 iPS細胞研究所 増殖分化機構研究部門 特定研究員
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2010年01月-2012年01月
米国国立癌研究所、米国国立衛生研究所 米国連邦政府職員
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2005年02月-2009年01月
米国国立がん研究所、米国国立衛生研究所 博士研究員
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2001年04月-2005年01月
国立がんセンター研究所 生化学部 厚生労働技官研究職2級
学会(学術団体)・委員会 【 表示 / 非表示 】
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2019年12月-継続中
グレートブリテン・北アイルランド連合王国(英国)
国際細胞老化研究会
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1996年07月-継続中
日本国
日本癌学会
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1996年05月-継続中
日本国
日本分子生物学会
研究等業績 【 表示 / 非表示 】
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p53 isoforms in cellular senescence- and ageing-associated biological and physiological functions.
Kaori FUJITA
International Journal of Molecular Sciences 20 ( 23 ) 6023 2019年11月 [査読有り] [招待有り]
研究論文(学術雑誌) 単著
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Positive feedback between p53 and TRF2 during telomere-damage signaling and cellular senescence.
Kaori FUJITA, Izumi Horikawa, Abdul M Mondal, Lisa M Miller Jenkins, et al.
Nature Cell Biology 12 ( 12 ) 1205 - 1212 2010年12月 [査読有り]
研究論文(学術雑誌) 国際共著
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p53 isoforms Δ133p53 and p53β are endogenous regulators of replicative cellular senescence.
Kaori FUJITA, Abudal M Mondal, Izumi Horikawa, Giang H Nguyễn, et al.
Nature Cell Biology 11 ( 9 ) 1135 - 1142 2009年09月 [査読有り]
研究論文(学術雑誌) 国際共著
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Autophagic degradation of the inhibitory p53 isoform Δ133p53α as a regulatory mechanism for p53-mediated senescence.
Izumi Horikawa, Kaori FUJITA, Lisa M Miller Jenkins, Yukiharu Hiyoshi, et al.
Nature Communications 5 4706 2014年08月 [査読有り]
研究論文(学術雑誌) 国際共著
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p53 isoforms regulate aging- and tumor-associated replicative senescence in T lymphocytes.
Abdul M Mondal, Izumi Horikawa, Sharon R Pine, Kaori FUJITA, et al.
International Journal of Clinical Investigation 123 ( 12 ) 5247 - 5257 2013年12月 [査読有り]
研究論文(学術雑誌) 国際共著
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Changes in acetyl-CoA mediate Sik3-induced maturation of chondrocytes in endochondral bone formation
Kosai A.
Biochemical and Biophysical Research Communications ( Biochemical and Biophysical Research Communications ) 516 ( 4 ) 1097 - 1102 2019年09月 [査読有り]
国内共著
The maturation of chondrocytes is strictly regulated for proper endochondral bone formation. Although recent studies have revealed that intracellular metabolic processes regulate the proliferation and differentiation of cells, little is known about how changes in metabolite levels regulate chondrocyte maturation. To identify the metabolites which regulate chondrocyte maturation, we performed a metabolome analysis on chondrocytes of Sik3 knockout mice, in which chondrocyte maturation is delayed. Among the metabolites, acetyl-CoA was decreased in this model. Immunohistochemical analysis of the Sik3 knockout chondrocytes indicated that the expression levels of phospho-pyruvate dehydrogenase (phospho-Pdh), an inactivated form of Pdh, which is an enzyme that converts pyruvate to acetyl-CoA, and of Pdh kinase 4 (Pdk4), which phosphorylates Pdh, were increased. Inhibition of Pdh by treatment with CPI613 delayed chondrocyte maturation in metatarsal primordial cartilage in organ culture. These results collectively suggest that decreasing the acetyl-CoA level is a cause and not result of the delayed chondrocyte maturation. Sik3 appears to increase the acetyl-CoA level by decreasing the expression level of Pdk4. Blocking ATP synthesis in the TCA cycle by treatment with rotenone also delayed chondrocyte maturation in metatarsal primordial cartilage in organ culture, suggesting the possibility that depriving acetyl-CoA as a substrate for the TCA cycle is responsible for the delayed maturation. Our finding of acetyl-CoA as a regulator of chondrocyte maturation could contribute to understanding the regulatory mechanisms controlling endochondral bone formation by metabolites.
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Proposal of patient-specific growth plate cartilage xenograft model for FGFR3 chondrodysplasia
Kimura T.
Osteoarthritis and Cartilage ( Osteoarthritis and Cartilage ) 26 ( 11 ) 1551 - 1561 2018年11月
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骨代謝と病気の新たなクロストーク:臓器連関から創薬まで 疾患特異的ヒトiPS細胞を用いた成長板軟骨モデルの確立と創薬への応用
木村 武司, 尾崎 友則, 藤田 香里, 山下 晃弘, 森岡 美穂, 大薗 恵一, 妻木 範行
日本骨代謝学会学術集会プログラム抄録集 ( (一社)日本骨代謝学会 ) 36回 115 - 115 2018年07月
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Horikawa I.
Cell Death and Differentiation ( Cell Death and Differentiation ) 24 ( 6 ) 1017 - 1028 2017年06月
p53 functions to induce cellular senescence, which is incompatible with self-renewal of pluripotent stem cells such as induced pluripotent stem cells (iPSC) and embryonic stem cells (ESC). However, p53 also has essential roles in these cells through DNA damage repair for maintaining genomic integrity and high sensitivity to apoptosis for eliminating severely damaged cells. We hypothesized that Delta 133p53, a physiological inhibitory p53 isoform, is involved in the balanced regulation of self-renewing capacity, DNA damage repair and apoptosis. We examined 12 lines of human iPSC and their original fibroblasts, as well as three ESC lines, for endogenous protein levels of Delta 133p53 and full-length p53 (FL-p53), and mRNA levels of various p53 target genes. While FL-p53 levels in iPSC and ESC widely ranged from below to above those in the fibroblasts, all iPSC and ESC lines expressed elevated levels of Delta 133p53. The p53-inducible genes that mediate cellular senescence (p21(WAF1), miR-34a, PAI-1 and IGFBP7), but not those for apoptosis (BAX and PUMA) and DNA damage repair (p53R2), were downregulated in iPSC and ESC. Consistent with these endogenous expression profiles, overexpression of Delta 133p53 in human fibroblasts preferentially repressed the p53-inducible senescence mediators and significantly enhanced their reprogramming to iPSC. The iPSC lines derived from Delta 133p53 overexpressing fibroblasts formed well-differentiated, benign teratomas in immunodeficient mice and had fewer numbers of somatic mutations than an iPSC derived from p53-knocked-down fibroblasts, suggesting that Delta 133p53 overexpression is non-or less oncogenic and mutagenic than total inhibition of p53 activities. Overexpressed Delta 133p53 prevented FL-p53 from binding to the regulatory regions of p21(WAF1) and miR-34a promoters, providing a mechanistic basis for its dominant-negative inhibition of a subset of p53 target genes. This study supports the hypothesis that upregulation of Delta 133p53 is an endogenous mechanism that facilitates human somatic cells to become self-renewing pluripotent stem cells with maintained apoptotic and DNA repair activities.
◆原著論文【 表示 / 非表示 】
◆その他【 表示 / 非表示 】
科研費(文科省・学振)獲得実績 【 表示 / 非表示 】
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生理的老化から加齢性疾患発症への転換機序解明のための完全ヒト化 p53 マウスの開発
基盤研究(C)
研究期間: 2023年04月 - 2026年03月 代表者: 藤田 香里
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抗老化因子Δ133p53による軟骨細胞への分化誘導と増殖 の分子機構解明とその応用
基盤研究(B)
研究期間: 2018年04月 - 2021年03月 代表者: 藤田 香里
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二次元培養下での脱分化軟骨細胞の再分化促進因子/低分子化合物の網羅的探索
挑戦的研究(開拓・萌芽)
研究期間: 2014年04月 - 2016年03月 代表者: 藤田 香里
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細胞老化を克服した軟骨細胞分化誘導/維持メカニズムの解析
基盤研究(B)
研究期間: 2013年04月 - 2017年03月 代表者: 藤田 香里