Down-regulation of peroxisome proliferator-activated receptor-γ gene expression by sphingomyelins

被引:6
|
作者
Al-Makdissy, N
Bianchi, A
Younsi, M
Picard, E
Valet, P
Martinet, N
Dauça, M
Donner, M
机构
[1] Univ Henri Poincare, Fac Med, EA 2402, Lab Nutr & Malad Metab, F-54505 Vandoeuvre Les Nancy, France
[2] Fac Med Vandoeuvre Nancy, CLERC Poumon, F-54505 Vandoeuvre Les Nancy, France
[3] INSERM U317, Toulouse, France
来源
FEBS LETTERS | 2001年 / 493卷 / 2-3期
关键词
sphingomyelin; hydrocarbon chain; cholesterol; PPAR gamma; gene expression;
D O I
10.1016/S0014-5793(01)02278-5
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
We recently demonstrated that the sphingomyelin (sn I) content of adipocyte membranes was negatively correlated with the expression of peroxisome proliferator-activated receptor-gamma (PPAR gamma) in the subcutaneous adipose tissue of obese women with variable degrees of insulin resistance. We have now investigated whether SM really does have an impact on the expression of PPAR gamma in 3T3-F442A adipocytes. Adding SM to the culture medium for 24 h caused a significant increase in SM content of adipocyte membranes and an acyl chain length-dependent decrease in the levels of PPAR gamma mRNA and protein. The longer the acyl chain of the fatty acid of SM, the greater was the decrease in PPAR gamma. These data suggest that the nature of the fatty acid is important in the regulation of PPAR gamma by the SM pathway. (C) 2001 Federation of European Biochemical Societies. Published by Elsevier Science B.V. Ah rights reserved.
引用
收藏
页码:75 / 79
页数:5
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