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1 Institute of Feed Science, Zhejiang University, The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, No. 164 Qiutao North Road, Hangzhou 310029, P. R. China
* To whom correspondence should be addressed. E-mail: chuxn{at}zju.edu.cn.
| Abstract |
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Adipose triglyceride lipase (ATGL) was recently identified and described as a major novel triglyceride lipase in animals. In this study, we aimed to study the tissue-specific and developmental expression pattern of porcine (p) ATGL, and the effect of resveratrol (RES) on expression of pATGL in vitro. The full-length cDNA sequences of pATGL was 1958 bp (accession no: EF583921), with a 1458 bp Open Reading Frame encoding a 486 AA protein (the predicated molecular mass of 53.2 kDa, accession no. ABS58651). Comparison of the deduced AA sequence with the bovine, mouse, rat, dog and human adipose triglyceride lipase showed 87%, 84%, 83%, 81% and 80% similarity, respectively. Furthermore, the pATGL was highly expressed in porcine adipose tissue, to a lesser degree in kidney, heart, and muscle, and least but detectable in brain. In s.c. adipose tissue, pATGL mRNA was very low at birth (1 kg BW), and increased, reaching a maximal value at 20 kg BW (about 8 wk old; P < 0.01). In peritoneal and omental adipose tissue, the greatest expression of pATGL was observed at 40 kg BW (about 12 wk old). In vitro, exposure of cultured adipocytes to 40 µM resveratrol and 80 µM resveratrol for 24 h increased the mRNA levels of pATGL by 95.3% (P < 0.05) and 146.8% (P < 0.01), respectly. Accordingly, lipid accumulation was decreased by 25.7% (P < 0.05) and 60.8% (P < 0.01), respectively. When treated with resveratrol for 48h, the mRNA levels of pATGL were increased by 104.1% (P < 0.05) and 163.1% (P < 0.01), respectively. As expected, lipid accumulation was decreased by 9.7% (P > 0.05) and 29.0% (P < 0.05), respectively. These results add to our understanding of the role of pATGL in adipose tissue development and as a potential target for regulating fat deposition and meat quality.
Key Words: adipose triglyceride lipase, cloning, gene expression, pig, resveratrol
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