TRANSFORMING GROWTH FACTOR-BETA(1) REGULATES THE EXPRESSION OF RYANODINE-SENSITIVE CA2+ OSCILLATIONS IN CARDIAC MYOCYTES

被引：22
|
作者：
NEYLON, CB [1 ]
BRYANT, SM [1 ]
LITTLE, PJ [1 ]
BOBIK, A [1 ]
机构：
[1] ALFRED HOSP,PRAHRAN,VIC 3181,AUSTRALIA
来源：
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS | 1994年 / 204卷 / 02期
关键词：
D O I：
10.1006/bbrc.1994.2513
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：
Factors which regulate sarcoplasmic reticulum (SR) gene expression are largely unknown. We investigated whether Transforming Growth Factor-beta(1) (TGF-beta(1)) plays a role in the maintenance of Ca2+. handling mechanisms in isolated neonatal rat cardiomyocytes. Myocytes cultured in the presence of serum were found to beat continuously and undergo spontaneous Ca2+ oscillations whereas in the absence of serum the cells lost the ability to undergo cyclical Ca2+ oscillations. The oscillations were restored when serum-free medium was supplemented with TGF-Beta(1). Both caffeine-induced Ca2+ elevations and the inhibitory effect of ryanodine on spontaneous activity were also dependent on the continued presence of TGF-beta(1); in its absence these indices of SR function were severely compromised. TGF-beta(1) therefore appears to play a critical role in the maintenance of Ca2+. oscillations in the heart by regulating the expression of the ryanodine-sensitive Ca2+ release mechanism. (C) 1994 Academic Press,
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页码：678 / 684
页数：7
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