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Journal of Biological Sciences
Year: 2007  |  Volume: 7  |  Issue: 4  |  Page No.: 693 - 696

Analysis of LDL Receptor mRNA Expression, Serum Biochemical and Abdominal Fat Weight in Fat and Lean Chickens

H.H. Musa, J.H. Cheng, X.S. Wu, H.P. Ju, D.M. Mekki and G.H. Chen    

Abstract: Present study was focus to compare LDL receptor mRNA expression, total cholesterol, triglyceride, lipoprotien levels and abdominal fat weight in genetically fat and lean chickens. Genetically lean (Rugao) and fat (Anka) chickens were reared in the same environmental condition, at 12 weeks of age samples of liver tissue were collected and abdominal fat weight was determined. Similarly, total cholesterol, triglycerides and high density lipoprotein were assayed using a commercial enzymatic kit, very low density lipoprotein and low density lipoprotein were estimated using the Friedewald equation. Total RNA from liver tissues were isolated using the standard Trizol methods and then total RNA was reverse transcribed by moloney murine Leukemia virus. Semi-quantitative RT-PCR was developed to quantify the levels of LDL receptor mRNA expression. The level of LDL receptor expression was significantly (p< 0.05) difference between lean and fat chicken. In addition, lean and fat chickens were significantly differed on triglyceride, very low density lipoprotein and abdominal fat weight. The expression of LDL receptor mRNA in liver of fat chicken was negatively correlated with abdominal fat weight. However, in lean chicken was negatively correlated with total cholesterol, triglyceride, lipoprotein concentration, abdominal fat weight and percentage of abdominal fat weight. In addition, within two breeds LDL receptor mRNA expression in liver was negatively correlated with low density lipoprotein, abdominal fat weight and percentage of abdominal fat weight.

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