Fiber Type Distribution, Cross-Sectional Area, and Succinate Dehydrogenase Activity of Soleus and Extensor Digitorum Longus Muscles in Spontaneously Hypertensive Rats

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概要

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• Fiber type distributions, cross-sectional areas (CSAs), and succinate dehydrogenase (SDH) activities of the slow soleus (SOL) muscle and the deep (EDLd) and superficial(EDLs) regions of the fast extensor digitorum longus (EDL) muscle were determined in 10- and 20-week-old male spontaneously hypertensive rats (SHR) and compared with those in age-matched normotensive Wistar-Kyoto rats (WKY).There were no differences in the body weight or the SOL and EDL weight between WKY and SHR at 10 weeks of age, while the body weight and the SOL and EDL weight were lower in SHR than in WKY at 20 weeks of age. A higher percentage of type IIA and type IIC fibers and a lower percentage of type I fibers were observed in SOL of SHR at 10 weeks of age. A higher percentage of type IIB fibers and a lower percentage of type IIA fibers were observed in EDLd and EDLs of SHR at 10 weeks of age. In contrast, there were no differences in the fiber type distribution, except a higher percentage of type IIA fibers and a lower percentage of type I fibers in EDLd of SHR, in SOL, EDLd, or EDLs between WKY and SHR at 20 weeks of age. There were no differences in the CSA, except a smaller CSA of type IIC fibers in SOL of SHR, in SOL, EDLd, or EDLs between WKY and SHR at 10 weeks of age. In contrast, a smaller CSA of type I fibers was observed in SOL of SHR at 20 weeks of age. A smaller CSA of all types of fibers in EDLd and of type IIA fibers in EDLs was observed in SHR at 20 weeks of age. There were no differences in the SDH activity of fibers between WKY and SHR, irrespective of the age and fiber type. It is concluded that age-related differences in the fiber type distribution or CSA are observed in the skeletal muscles between SHR and WKY.

• 日本組織細胞化学会の論文

著者

• 石原 昭彦

  Kyoto University

• ISHIHARA Akihiko

  Laboratory of Neurochemistry, Graduate School of Human and Environmental Studies, Kyoto University

• Itoh Kazuo

  Kyoto University

• Itoh Minoru

  Kyoto University

• NAKATANI Toshiaki

  Department of Pharmacology, Nara Medical University

• NAKASHIMA Toshikatsu

  Department of Pharmacology, Nara Medical University

• KITA Taizo

  Department of Pharmacology, Nara Medical University

• HIROFUJI Chiyoko

  Laboratory of Exercise Physiology, Osaka Gakuin University

• ITOH Kazuo

  Graduate School of Integrated Science and Art, University of East Asia

• ITOH Minoru

  Laboratory of Neurochemistry, Faculty of Integrated Human Strudies, Kyoto University

• 石原 昭彦

  Laboratory Of Neurochemistry Graduate School Of Human And Environmental Studies Kyoto University

• Inoue Keisuke

  Department Of Anatomy & Neurobiology Kyoto Prefectural University Of Medicine

• HIROFUJI Chiyoko

  Oosaka Gakuin Junior College

• Ishihara Akihiko

  Second Department Of Internal Medicine The University Of Tokushima

• Ishihara Akihiko

  Laboratory Of Neurochemistry Faculty Of Integrated Human Studies Kyoto University

• Kita Taizo

  Department Of Pharmacology Nara Medical University:department Of Pharmacology Daiichi College Of Pha

• Kita Taizo

  Department Of Pharmacology Daiichi College Of Pharmaceutical Sciences

• Nakatani Toshiaki

  Department Of Health And Sport Studies Tenri University

• Nakashima Toshikatsu

  Department Of Pharmacology Nara Medical College

• Ishihara Akihiko

  Laboratory Of Cell Biology And Life Science Graduate School Of Human And Environmental Studies Kyoto University

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