Calpain concentration is elevated although net calcium-dependent proteolysis is suppressed in dystrophin-deficient muscle.
Calpain concentration is elevated although net calcium-dependent proteolysis is suppressed in dystrophin-deficient muscle.
复制标题
尽管抗肌营养不良蛋白缺乏的肌肉中净钙依赖性蛋白水解作用受到抑制,但钙蛋白酶浓度升高。
DOI:
10.1016/0014-4827(92)90045-a
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发表时间:
1992
影响因子:
3.7
通讯作者:
Tidball,JG
中科院分区:
文献类型:
--
作者:
Spencer,MJ;Tidball,JG
The concentration, activity, and distribution of calcium-dependent proteases (calpains) are compared in dystrophin-deficient (mdx) and control mouse muscle. Calpains have been implicated previously as the protease responsible for the observed necrosis in dystrophin-deficient human muscle. Although these mouse and human muscular dystrophies have been attributed to similar genetic defects, the mouse dystrophy shows a brief necrotic episode while the human deficiency results in progressive, lethal muscle necrosis. Findings of the present study show that control mouse muscle contains more calcium-dependent proteolytic activity than dystrophin-deficient muscle. Paradoxically, adult, dystrophin-deficient mouse muscle contains higher concentrations of calpain than found in controls. Furthermore, indirect immunofluorescence using antisera produced against an oligopeptide found in the proteolytic domain of calpain shows that calpain distribution in dystrophin-deficient muscle is dispersed throughout the cytoplasm while immunolabeling of control muscle shows calpain concentrated at Z-discs. This redistribution is consistent with calpain activation in dystrophic muscle. These findings indicate thatmdxmice possess the capability of suppressing calpain-mediated proteolysis. We speculate that this suppression may enable dystrophin-deficient mouse muscle to arrest necrosis and regenerate successfully.
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影响因子:
3.7
作者:
J. Schollmeyer
通讯作者:
J. Schollmeyer
DOI:
--
发表时间:
1991
期刊:
The American journal of pathology
影响因子:
--
作者:
Tidball,JG;Law,DJ
通讯作者:
Law,DJ
影响因子:
4.8
作者:
S. A. Coolican;D. Hathaway
通讯作者:
D. Hathaway
影响因子:
2.9
作者:
DAYTON, WR;GOLL, DE;REVILLE, WJ
通讯作者:
REVILLE, WJ
DOI:
--
发表时间:
1986
期刊:
Clinica chimica acta; international journal of clinical chemistry
影响因子:
--
作者:
P. A. Reddy;T. E. Anandavalli;M. Anandaraj
通讯作者:
M. Anandaraj