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Interrelation between long-chain fatty acid oxidation rate and carnitine palmitoyltransferase 1 activity with different isoforms in rat tissues

机译:大鼠组织中不同异构体的长链脂肪酸氧化速率与肉碱棕榈酰转移酶1活性之间的相互关系

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This study examined the interrelation between the long-chain fatty acid (LCFA) oxidation rate and the carnitine palmitoyltransferase (CPT) 1 activity in various tissues containing L-CPT1 or M-CPT1. The Liver, kidney, heart, white and red gastrocnemius muscles, and white and brown adipose tissues obtained from Sprague-Dawley rats were examined. In the tissues containing L-CPT1 the liver showed a significantly higher (P < 0.01) palmitate oxidation rate and CPT 1 activity than the kidney. Among the tissues containing M-CPT1, the brown adipose tissue showed the highest palmitate oxidation rate and CPT1 activity. The tissues containing M-CPTI (r(2)=0.907, p < 0.001) showed a strong positive correlation between the palmitate oxidation rate and the CPT1 activity. The ratios of the palmitate oxidation rate to the CPT1 activity were calculated. The ratio in the liver was highest and the ratio in the kidney was lowest among the tissues. The ratios of the tissues containing M-CPT1 were similar. These results showed that the LCFA oxidation rates in the tissues containing M-CPT1 were directly proportional to the CPTI activity, but not similarly proportional to the CPT1 activity in the tissues containing L-CPT1 In conclusion, CPT1 activity seems very important factor for LCFA oxidation, but it might be not the only rate-limiting step in LCFA oxidation. (c) 2005 Elsevier Inc. All rights reserved.
机译:这项研究检查了长链脂肪酸(LCFA)氧化速率与肉碱棕榈酰转移酶(CPT)1活性在含有L-CPT1或M-CPT1的各种组织中的相互关系。检查了从Sprague-Dawley大鼠获得的肝,肾,心脏,白色和红色腓肠肌以及白色和棕色脂肪组织。在含有L-CPT1的组织中,肝脏的棕榈酸酯氧化率和CPT 1活性明显高于肾脏(P <0.01)。在含有M-CPT1的组织中,棕色脂肪组织的棕榈酸酯氧化率和CPT1活性最高。含有M-CPTI的组织(r(2)= 0.907,p <0.001)在棕榈酸酯氧化率和CPT1活性之间显示出很强的正相关性。计算棕榈酸酯氧化速率与CPT1活性的比率。在组织中,肝脏中的比例最高,而肾脏中的比例最低。含有M-CPT1的组织的比率是相似的。这些结果表明,含有M-CPT1的组织中的LCFA氧化速率与CPTI活性成正比,但与含有L-CPT1的组织中的CPT1活性成正比。总之,CPT1活性似乎是LCFA氧化的重要因素,但这可能不是LCFA氧化中唯一的限速步骤。 (c)2005 Elsevier Inc.保留所有权利。

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