当前位置： SCI文献检索 > ARCHIVES OF BIOCHEMISTRY AND BIOPHYSICS期刊下所有文献 > Antioxidant enzyme systems in rat liver and skeletal muscle. Influences of selenium deficiency, chronic training, and acute exercise.

Antioxidant enzyme systems in rat liver and skeletal muscle. Influences of selenium deficiency, chronic training, and acute exercise.

Abstract：

:The influences of selenium deficiency (Se-D), chronic training, and an acute bout of exercise on hepatic and skeletal muscle antioxidant enzymes, i.e., superoxide dismutase (SOD), catalase, and glutathione peroxidase (GPX), as well as glutathione S-transferase (GST) and tissue lipid peroxidation, were investigated in post-weaning male Sprague-Dawley rats. Se-D per se depleted GPX in both liver and skeletal muscle but had no effect on SOD or catalase activity. One hour of treadmill running (20 m/min, 0% grade and 27 m/min, 15% grade for untrained and trained rats, respectively) significantly elevated hepatic catalase and cytosolic SOD activity; more prominent activations were found in the Se-D or untrained rats, whereas skeletal muscle antioxidant enzymes were little affected. Ten weeks of training (1 h/day, 5 days/week at 27 m/min, 15% grade) increased hepatic mitochondrial SOD by 23% (P less than 0.05) in Se-D rats. Both hepatic mitochondrial and cytosolic GPX were decreased by training whereas GPX was increased twofold in skeletal muscle mitochondria. Se-independent GPX was elevated by training only in the skeletal muscle mitochondria of Se-D rats. Lipid peroxidation (malondialdehyde formation) was increased by an acute bout of exercise in hepatic mitochondria of the untrained rats and in skeletal muscle mitochondria of the Se-D rats. These data indicate that antioxidant enzymes in liver and skeletal muscle are capable of adapting to selenium deficiency and exercise to minimize oxidative injury caused by free radicals.

journal_name

Arch Biochem Biophys

journal_title

Archives of biochemistry and biophysics

authors

Ji LL,Stratman FW,Lardy HA

doi

10.1016/0003-9861(88)90623-6

subject

Has Abstract

pub_date

1988-05-15 00:00:00

pages

150-60

issue

1

eissn

0003-9861

issn

1096-0384

pii

0003-9861(88)90623-6

journal_volume

263

pub_type

杂志文章

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