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タイトル: TRPC3-GEF-H1 axis mediates pressure overload-induced cardiac fibrosis
著者: Numaga-Tomita, Takuro
Kitajima, Naoyuki
Kuroda, Takuya
Nishimura, Akiyuki
Miyano, Kei
Yasuda, Satoshi
Kuwahara, Koichiro
Sato, Yoji
Ide, Tomomi
Birnbaumer, Lutz
Sumimoto, Hideki
Mori, Yasuo  kyouindb  KAKEN_id
Nishida, Motohiro
著者名の別形: 森, 泰生
発行日: 19-Dec-2016
出版者: Springer Nature
誌名: Scientific Reports
巻: 6
論文番号: 39383
抄録: Structural cardiac remodeling, accompanying cytoskeletal reorganization of cardiac cells, is a major clinical outcome of diastolic heart failure. A highly local Ca2+ influx across the plasma membrane has been suggested to code signals to induce Rho GTPase-mediated fibrosis, but it is obscure how the heart specifically decodes the local Ca2+ influx as a cytoskeletal reorganizing signal under the conditions of the rhythmic Ca2+ handling required for pump function. We found that an inhibition of transient receptor potential canonical 3 (TRPC3) channel activity exhibited resistance to Rho-mediated maladaptive fibrosis in pressure-overloaded mouse hearts. Proteomic analysis revealed that microtubule-associated Rho guanine nucleotide exchange factor, GEF-H1, participates in TRPC3-mediated RhoA activation induced by mechanical stress in cardiomyocytes and transforming growth factor (TGF) β stimulation in cardiac fibroblasts. We previously revealed that TRPC3 functionally interacts with microtubule-associated NADPH oxidase (Nox) 2, and inhibition of Nox2 attenuated mechanical stretch-induced GEF-H1 activation in cardiomyocytes. Finally, pharmacological TRPC3 inhibition significantly suppressed fibrotic responses in human cardiomyocytes and cardiac fibroblasts. These results strongly suggest that microtubule-localized TRPC3-GEF-H1 axis mediates fibrotic responses commonly in cardiac myocytes and fibroblasts induced by physico-chemical stimulation.
著作権等: © The Author(s) 2016. This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
URI: http://hdl.handle.net/2433/218788
DOI(出版社版): 10.1038/srep39383
PubMed ID: 27991560
出現コレクション:学術雑誌掲載論文等

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