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  • Title: Regulatory role of Sirt1 on the gene expression of fatty acid-binding protein 3 in cultured porcine adipocytes.
    Author: Shan TZ, Ren Y, Wu T, Liu CX, Wang YZ.
    Journal: J Cell Biochem; 2009 Aug 01; 107(5):984-91. PubMed ID: 19479941.
    Abstract:
    To investigate whether Sirt1 could modulate fatty acid-binding protein 3 (FABP3), we treated porcine adipocytes either with the Sirt1 inhibitor nicotinamide (NAM), with the Sirt1 activator resveratrol (RES), or by knockdown of Sirt1 by Sirt1-siRNA. NAM or knockdown with Sirt1-siRNA significantly inhibited Sirt1 mRNA expression, while increasing FABP3 mRNA levels. RES or RES + Sirt1-siRNA treatments further proved that Sirt1 negatively regulated FABP3 gene expression in adipocytes. We also found a similar Sirt1 regulation pattern for PPAR gamma to that of FABP3 in adipocytes. Furthermore, NAM/RES + PPAR gamma-siRNA treatments showed that Sirt1 may regulate the FABP3 gene expression partly through the PPAR gamma-mediated signals. In summary, Sirt1 regulates the expression of FABP3 gene in adipocytes, and PPAR gamma apparently plays an important role in this process.
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