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Japanese

Responsive changes of rat papillary muscle relaced with corticosterone Takayoshi Utsunomiya 1 , Masato Okabe 1 , Ryoki Kawamura 1 , Kazuo Namikawa 1 , Masao Yufu 1 , Katsuyoshi Taki 1 , Toshihide Mitsuno 1 , Masanori Araki 1 , Giro Horie 1 1Dept. of Surgery, National Kumamoto Hospital pp.89-92
Published Date 1983/1/15
DOI https://doi.org/10.11477/mf.1404204162
  • Abstract
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Marked changes of reactivity to isoproterenol were observed in the rat papillary muscles after treating with high concentrations of corticosterone.

Developed tension (Tpd), maximal dp/dt, the time to peak tension of the papillary muscle were observed. Corticosterone decreased the developed tension depending on its concentration (10-I-10-3 M). At 32℃ and 23℃, the isometric contraction against isoproterenol was enhanced by the treat-ment of corticosterone. It was demonstrated that corticosterone restores decreased muscle contrac-tion to the basal forse by enhancement of reactivity to β-stimulant.


Copyright © 1983, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1200 印刷版ISSN 0452-3458 医学書院

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