Alteration of mitochondrial oxidative capacity during porcine preadipocyte differentiation and in response to leptin

作者：Luo Gui Fen; Yu Tai Yong; Wen Xu Hui; Li Ying; Yang Gong She^*

来源：Molecular and Cellular Biochemistry, 2008, 307(1-2): 83-91.

DOI：10.1007/s11010-007-9587-2

• mitochondrial oxidative capacity
• preadipocyte
• differentiation
• leptin

Mitochondrial apparatus is a fundamental aspect in cell, serving for amino acid biosynthesis, fatty acid oxidation (FAO), and ATP production. In this article, we investigated the change of mitochondrial oxidative capacity during porcine adipocyte differentiation and in response to leptin. Rhodamine 123 staining analysis showed about 2-fold increase of mitochondrial membrane electric potential in differentiated adipocyte in comparison with preadipocyte. The mRNA expression of Cytochromes c (Cyt c), carnitine palmitoyltransferase 1 (CPT1), and malate dehydrogenases (MDH) increased markedly (P < 0.05), but that of UCP2 decreased (P < 0.05). Moreover PGC-1 alpha and UCP3 was very low and showed no changes during the adipocyte differentiation. The protein expression of Cyt c and the enzyme activity of Cytochrome c oxidase (COX) increased with preadipocyte differentiation, but cellular ATP level decreased. Furthermore, at the level of 10 and 100 ng/ml leptin not only selectively increased the gene expression of PGC-1 alpha, CPT1, Cyt c, UCP2, and UCP3 (P < 0.05), but also enhanced COX enzyme activity which related to mitochondrial FAO. There is no change of Mitochondrial membrane electric potential and ATP level in cell treated by leptin. These results suggested Mitochondrial is not only critical in FAO, but also play an important role in adipogenesis.

• 出版日期2008-1
• 单位西北农林科技大学