Gender-specific effects of dexamethasone treatment on rat diaphragm structure and function.
Gender-specific effects of dexamethasone treatment on rat diaphragm structure and function.
复制标题
地塞米松治疗对大鼠膈肌结构和功能的性别特异性影响。
DOI:
10.1152/jappl.1997.82.1.125
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发表时间:
1997
期刊:
影响因子:
--
通讯作者:
Cahill,J
中科院分区:
文献类型:
--
作者:
Prezant,DJ;Karwa,ML;Richner,B;Maggiore,D;Gentry,EI;Cahill,J
Prezant, D. J., M. L. Karwa, B. Richner, D. Maggiore, E. I. Gentry, and J. Cahill.Gender-specific effects of dexamethasone treatment on rat diaphragm structure and function.J. Appl. Physiol.82(1): 125–133, 1997.—The effects of long-term dexamethasone treatment on diaphragm muscle were studied in female and male rats. Compared with pair-fed control animals, dexamethasone treatment did not significantly affect estrous cycling or peak serum estradiol levels; however, testosterone levels were significantly increased in females and decreased in males. Dexamethasone significantly reduced body and costal diaphragm weights, but to a lesser extent in females than in males. Reductions in diaphragm weight were proportional to reductions in body weight. In females and males, dexamethasone treatment significantly decreased diaphragm fiber (types I and II) cross-sectional area and the relative expression of myosin heavy chain isoform 2B. With the exception of type I fiber atrophy, these changes occurred to a lesser extent in females. Dexamethasone did not significantly affect specific forces. Dexamethasone significantly increased twitch one-half relaxation time and fatigue resistance indexes in males but not in females. In conclusion, the effects of long-term dexamethasone treatment were gender specific, with significantly fewer effects in females, and changes in serum testosterone levels were associated with these findings.
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DOI:
--
发表时间:
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期刊:
American Review of Respiratory Disease
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