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首页> 外文期刊>Canadian Journal of Physiology and Pharmacology >Carvedilol suppresses fatty acid oxidation and stimulates glycolysis in C2C12 cells
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Carvedilol suppresses fatty acid oxidation and stimulates glycolysis in C2C12 cells

机译:卡维地洛抑制C2C12细胞中的脂肪酸氧化并刺激糖酵解

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Beta adrenergic receptor blocking drugs (β-blockers) are used chronically in many cardiovascular diseases such as hypertension, ischemic heart disease, arrhythmia, and heart failure. Beneficial effects are associated with the inhibition of symphathetic nervous system hyperactivity, reduction of heart rate, and remodeling by blocking the mitogenic activity of catecholamines. A possible effect of β-blockers on substrate metabolism has also been suggested. The direct effects of β-blockers on mouse C2C12 cells were investigated in this study. C2C12 cells were grown in Dulbecco's modified Eagle's medium (DMEM) supplemented with 10% fetal bovine serum (FBS) and differentiated into myotubes in the same medium that contained 1% FBS. Palmitic acid oxidation and glycolysis were measured by using [9,10- 3]palmitate and [5- 3H]glucose, respectively. The amount of 3H 2O was measured as an indicator of substrate usage. Carvedilol (100 μmol/L) inhibited palmitate oxidation and increased glycolysis by nearly 50%. Prazosin altered substrate metabolism in a similar fashion as carvedilol, whereas propranolol or bisoprolol were devoid of metabolic effects. When added to mimic sympathetic activation, epinephrine stimulated glycolysis but did not alter fatty acid oxidation. Based on these results, carvedilol appears to have direct effects on substrate metabolism that are related to the blockade of α1 adrenergic receptors.
机译:β肾上腺素受体阻断药(β受体阻滞剂)长期用于许多心血管疾病,例如高血压,缺血性心脏病,心律不齐和心力衰竭。通过阻止儿茶酚胺的促有丝分裂活性,有益的作用与抑制交感神经系统亢进,降低心率和重塑有关。也有人建议β-受体阻滞剂可能对底物代谢产生影响。在这项研究中研究了β受体阻滞剂对小鼠C2C12细胞的直接作用。 C2C12细胞在补充有10%胎牛血清(FBS)的Dulbecco改良Eagle培养基(DMEM)中生长,并在含有1%FBS的相同培养基中分化为肌管。棕榈酸的氧化和糖酵解分别通过使用[9,10-3]棕榈酸酯和[5- 3H]葡萄糖来测量。测量3H 2O的量作为基材使用的指标。卡维地洛(100μmol/ L)抑制棕榈酸酯氧化,使糖酵解增加近50%。哌唑嗪以与卡维地洛相似的方式改变底物代谢,而普萘洛尔或比索洛尔没有代谢作用。当加入模拟交感神经激活时,肾上腺素刺激糖酵解,但不改变脂肪酸氧化。基于这些结果,卡维地洛似乎对与α1肾上腺素受体阻滞有关的底物代谢具有直接影响。

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