Short- and long-term effects of testosterone on diaphragm in castrated and normal male rats.
Short- and long-term effects of testosterone on diaphragm in castrated and normal male rats.
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睾酮对去势雄性大鼠和正常雄性大鼠膈肌的短期和长期影响。
DOI:
10.1152/jappl.1997.82.1.134
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发表时间:
1997
期刊:
影响因子:
--
通讯作者:
Valentine,DE
中科院分区:
文献类型:
--
作者:
Prezant,DJ;Karwa,ML;Kim,HH;Maggiore,D;Chung,V;Valentine,DE
Prezant, David J., Manoj L. Karwa, Helen H. Kim, Diane Maggiore, Virginia Chung, and David E. Valentine.Short- and long-term effects of testosterone on diaphragm in castrated and normal male rats.J. Appl. Physiol.82(1): 134–143, 1997.—The effects of short- and long-term testosterone absence or treatment on the diaphragm were studied in castrated and sexually normal male rats. Compared with control rats (untreated normal males), testosterone absence or treatment did not significantly affect costal weight. In untreated castrated males, there were significant decreases in specific forces, type II fiber cross-sectional area, and myosin heavy chain (MHC) isoform 2B after 2.5 wk. In castrated males that received testosterone, there were significant increases in specific forces, type II total fiber proportional area, and relative expression of all adult diaphragm fast MHC isoforms (MHC-2all) after 2.5 wk. In normal males that received testosterone, the only significant finding was an increase in MHC-2B after 2.5 wk. Across all groups, there was close correlation between increases in maximum tetanic forces and MHC-2all. Changes in diaphragm function and composition were closely related to changes in serum testosterone levels at 2.5 wk. The lack of significant change in diaphragm function at 10 wk occurred despite changes in serum testosterone levels and diaphragm composition similar to those at 2.5 wk. These findings support our hypothesis that the effects of testosterone are dependent on basal circulating androgen levels and study duration.
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影响因子:
3.3
作者:
FITTS, RH;COSTILL, DL;GARDETTO, PR
通讯作者:
GARDETTO, PR
DOI:
--
发表时间:
1981
期刊:
影响因子:
--
作者:
Ryan Aj
通讯作者:
Ryan Aj
DOI:
--
发表时间:
1991
期刊:
影响因子:
--
作者:
G. Sieck;M. Fournier
通讯作者:
M. Fournier
DOI:
--
发表时间:
1983
期刊:
Journal of Steroid Biochemistry
影响因子:
--
作者:
R. Hickson;T. Galassi;T. Kurowski;D. Daniels;R. Chatterton
通讯作者:
R. Chatterton
DOI:
--
发表时间:
1971
期刊:
Medicine and Science in Sports
影响因子:
--
作者:
B. Brown;A. Pilch
通讯作者:
A. Pilch