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Porcine sirtuin 1 gene clone, expression pattern, and regulation by resveratrol.

J. Anim. Sci.2009 Mar;87(3):895-904. Epub 2008 Nov 07
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摘要


Sirtuin1 (Sirt1) is a NAD-dependent deacetylase that plays important roles in a variety of biological processes. In the current study, we examined tissue-specific and different expression pattern of porcine Sirt1 and the effect of resveratrol (RES) on expression of Sirt1 in porcine adipocytes. The full-length complementary DNA sequence of porcine Sirt1 was 4,024 bp (GenBank accession no: EU030283), with a 2,226-bp open reading frame encoding a 742-AA protein (a predicted molecular mass of 80.9 kDa; GenBank accession no. ABS29571). Comparison of the deduced AA sequence with the corresponding sequences of human, dog, cattle, and mouse Sirt1 showed 82 to 92% similarity. Furthermore, the porcine Sirt1 was highly expressed in porcine brain, to a lesser degree in spleen and white adipose tissue, and had low but detectable expression in liver. In subcutaneous adipose tissue and omental adipose tissue, expression of the porcine Sirt1 mRNA was greater in adult pigs than in young pigs (P < 0.01). In vitro, exposure of cultured adipocytes to 40 and 80 micro M RES for 24 h increased mRNA levels of porcine Sirt1 by 47.86% (P < 0.01) and 91.04% (P < 0.01), respectively. Accordingly, lipid accumulation and NEFA release were decreased (P < 0.05), respectively. After cultures were treated with RES for 48 h, the mRNA level of porcine Sirt1 was increased by 103.84% (P < 0.01) and 148.79% (P < 0.01), respectively. Lipid accumulation was decreased and NEFA release was increased (P < 0.05), respectively. These results provide information needed for manipulating Sirt1 expression in regulating fat deposition in pigs.

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