<Originals>The Synergistic Effect of Dietary Calcium Restriction and Exhaustive Exercise on the Antioxioxidant Enzyme System in Rat Heart

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概要

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• Miyazaki, H., Oh-ishi, S., Ookawara, T., Kizaki, T., Nakao, C., Sato, Y., Haga, S. and Ohno, H., The Synergistic Effect of Dietary Calcium Restriction and Exhaustive Exercise on the Antioxioxidant Enzyme System in Rat Heart. Adv. Exerc. Sports Physiol., Vol.6, No.3 pp85-89, 2000. The purpose of current study was to elucidate wheter dietary calcium restriction enhances exercise-induced oxidative stress in rat heart. Twenty-four male Wistar rats were assinged randomly to either the control (c) or the calcium-restricted (1 month) (R) rats. Each group was subdivided into non-exercised (CR. RR) or acutely exercised (CE, RE) groups. The level of thiobarbituric acid-reactive substances (TBARS), a marker of lipid peroxidation, was significantly greater in the RR rats than in the CR rats, and acute exercise elevated TBARS level only in the C group. On the other hand, reactive carbonyl significantly increased afrer exhaustive exercise in the R group, but not in the C group. Next the levels of major antioxidant enzymes [Mn-superoxide dismutase (Mn-SOD). Cu.Zn-SOD. glutathione peroxidase (GPX), and catalase (CAT)] in heart was determined. Dietary calcium restriction sugnificantly decreased immunoreacive Mn-SOD and Cu.Zn-SOD contents in addition to Mn-SOD activity. Acute exercise significantly decreased Cu.Zu-SOD content only in the C rats. Meanwhile, GPX and CAT activities were unchanged throughout the experiment. The results obtained suggest that dietary calcium restriction induces an increase of oxidative stress in rat heat, possibly attributable to a decrease in SOD isoenzyme levels, especially in Mn-SOD activity, and that exhaustive exercise enhances such an oxidative stress.

• 日本運動生理学会の論文

著者

• OH-ISHI SHUJI

  Fifth Department of Internal Medicine, Tokyo Medical University

• Haga Shukoh

  Institute Of Health & Sports Sciences University Of Tsukuba

• Ohishi Shuji

  Fifth Department Of Internal Medicine Tokyo Medical University

• MIYAZAKI Hiromi

  Institute of Health and Sport Sciences, University of Tsukuba

• OOKAWARA Tomomi

  Department of Biochemistry, Hyogo University of Medicine

• Oh-ishi Shuji

  Kasumigaura Hospital Tokyo Medical University

• Sato Yuzo

  Research Center Of Health Physical Fitness And Sports Department Of Sports Medicine Graduate School

• Miyazaki Hiromi

  Institute Of Health And Sport Sciences University Of Tsukuba

• Ookawara Tomomi

  Department Of Biochemistry Hyogo University Of Medicine

• Ohno Hideki

  Department Of Gastroenterology Graduate School Of Medicine University Of Tokyo

• Kizaki Takako

  Department Of Molecular Predictive Medicine And Sport Science Kyorin University School Of Medicine

• Ookawara Tomomi

  Department Of Biochemistry Hyogo College Of Medicine

• Nakao Chitose

  Research Center of Health, Physical Fitness and Sports, Nagoya University

• OHNO Hideki

  Department of Gastroenterology and Cancer Gene Regulation, Kanazawa University Graduate School of Medical Sciences

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