OXIDATIVE MUSCULAR INJURY AND ITS RELEVANCE TO HYPERTHYROIDISM

被引:127
作者
ASAYAMA, K
KATO, K
机构
[1] Department of Pediatrics, Yamanashi Medical College, Nakakomagun, Yamanashi Pref., 409-38, 1110 Shimakato, Tomahocho
关键词
Free radical; Glutathione; Hyperthyroidism; Lipid peroxide; Mitochondria; Myocardium; Skeletal muscle; Superoxide dismutase;
D O I
10.1016/0891-5849(90)90077-V
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
In experimental hyperthyroidism, acceleration of lipid peroxidation occurs in heart and slow-oxidative muscles, suggesting the contribution of reactive oxygen species to the muscular injury caused by thyroid hormones. This article reviews various models of oxidative muscular injury and considers the relevance of the accompanying metabolic derangements to thyrotoxic myopathy and cardiomyopathy, which are the major complications of hyperthyroidism. The muscular injury models in which reactive oxygen species are supposed to play a role are ischemia/reperfusion syndrome, exercise-induced myopathy, heart and skeletal muscle diseases related to the nutritional deficiency of selenium and vitamin E and related disorders, and genetic muscular dystrophies. These models provide evidence that mitochondrial function and the glutathione-dependent antioxidant system are important for the maintenance of the structural and functional integrity of muscular tissues. Thyroid hormones have a profound effect on mitochondrial oxidative activity, synthesis and degradation of proteins and vitamin E, the sensitivity of the tissues to catecholamine, the differentiation of muscle fibers, and the levels of antioxidant enzymes. The large volume of circumstantial evidence presented here indicates that hyperthyroid muscular tissues undergo several biochemical changes that predispose them to free radical-mediated injury. © 1990.
引用
收藏
页码:293 / 303
页数:11
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