Evidence that levels of malate dehydrogenase and fumarase are increased by cAMP in rat myotubes.

Evidence that levels of malate dehydrogenase and fumarase are increased by cAMP in rat myotubes.
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有证据表明,cAMP 可以增加大鼠肌管中苹果酸脱氢酶和延胡索酸酶的水平。

DOI:
10.1152/ajpcell.1984.247.1.c33
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发表时间:
1984
期刊:
The American journal of physiology
影响因子:
--
通讯作者:
Salsgiver,WJ
Salsgiver,WJ
中科院分区:
--
文献类型:
--
作者:
LawrenceJr,JC;Salsgiver,WJ

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我们研究了原代培养的大鼠骨骼肌细胞中腺苷3 ',5'-环磷酸(cAMP)在控制能量代谢酶水平中的潜在作用。与霍乱毒素或毛喉素(2腺苷酸环化酶的持续激活剂)孵育的肌管显着增加的水平的两种酶的氧化代谢,脱氢酶和苹果酸脱氢酶。磷酸二酯酶抑制剂(咖啡因、茶碱、可可碱、3-异丁基-1-甲基黄嘌呤、罂粟碱、MJ 1988、Ro 20-1724或SQ 20009)和cAMP衍生物:8-溴-cAMP或二丁酰cAMP也可使这些酶升高(1.5- 2.0倍)。相反,糖酵解代谢的两种酶,乳酸脱氢酶和丙酮酸激酶,并不总是受到这些药物的影响。所呈现的结果提供了强有力的证据,表明cAMP的增加可以导致氧化能量代谢的某些酶的增加。
We have investigated the potential role of adenosine 3',5'-cyclic monophosphate (cAMP) in controlling levels of enzymes of energy metabolism in primary cultures of rat skeletal muscle cells. Incubating myotubes with cholera toxin or forskolin (2 persistent activators of adenylate cyclase) significantly increased the levels of two enzymes of oxidative metabolism, fumarase and malate dehydrogenase. These enzymes were also increased (1.5- to 2.0-fold) by phosphodiesterase inhibitors (caffeine, theophylline, theobromine, 3-isobutyl-1-methylxanthine, papaverine, MJ 1988, Ro 20–1724, or SQ 20009) and the cAMP derivatives: 8-bromo-cAMP or dibutyryl cAMP. In contrast two enzymes of glycolytic metabolism, lactate dehydrogenase and pyruvate kinase, were not consistently affected by these agents. The results presented provide strong evidence that an increase in cAMP can lead to an increase in certain enzymes of oxidative energy metabolism.
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