鵝肥肝形成過程中調(diào)控SCD1基因的miRNA研究
[Abstract]:MicroRNA (miRNA) is a class of endogenous non-coding single-stranded RNA molecules of about 22m. It widely exists in many organisms, such as viruses, animals and plants. By binding to the target gene 3'UTR region, target mRNA translation is inhibited or degraded. SCD1 is a kind of catalytic enzyme located in the endoplasmic reticulum and a rate-limiting enzyme for the synthesis of monounsaturated fatty acids in hepatocytes. They are capable of converting palmitic acid and stearyl coenzyme A into palmitic acid and oleic acid, respectively. These unsaturated fatty acids synthesize a variety of lipids, including triglycerides, phospholipids, cholesterol, SCD1 plays an important role in the lipid metabolism of the liver, that is, in fat synthesis and fatty acid oxidation. The aim of this study was to screen the expression of SCD1 gene and its regulation of 1niRNA in the liver of Landau Goose. The main results were as follows: (1) the liver weight and liver body ratio of Landes geese increased gradually with the prolongation of feeding time, and the average weight of liver was 124.5 g at 70 days of age (feeding 0 days). The average weight of liver increased to 826.6g at 89 days of age (19 days of feeding). At the age of 70 days, the average body weight ratio was 3.21% and the average body weight ratio was 10.30% at the age of 89 days. In this experiment, fluorescence quantitative PCR was used to determine the change trend of SCD1 gene expression in all stages of feeding and control groups. The results showed that the expression of SCD1 gene in the feeding group was higher than that in the control group, and at the age of 19 days (89 days), the expression level of the SCD1 gene in the feeding group was higher than that in the control group. The expression level in the feeding group was significantly higher than that in the control group. The contents of palmitic oil acid, triglyceride and cholesterol in each stage of feeding group were measured, and the correlation between SCD1 gene and indexes in each stage of feeding group was analyzed. The expression of SCD1 gene was positively correlated with oleic acid, cholesterol and VLDL (P0.01). There was a significant positive correlation between triglyceride content and triglyceride content (P0.05). (2). By software prediction and sequencing results of small RNA in the early stage, the miRNA of goose SCD1 gene was selected to be miR-30b, miR-30a-5p and miR-10b,. SYBR Green dye fluorescence quantitative PCR was used to determine the changes of miRNA expression in each stage of feeding group and control group. The expression of miRNA in control group was higher than that in feeding group. Contrary to the change of SCD1 gene expression. (3) goose miR-30b and] miR-30a-5p precursor sequences were amplified from Langde geese, and the homology with miR-30b and miR-30a-5p precursors was 100%. Using the double luciferase report system to verify the three miRNA, screened in CHO cell line, the results show that miR30b and miR-30a-5p are the miRNA. to regulate the SCD1 gene of goose. It was suggested that miR-30b and miR-30a-5p might influence the lipid metabolism of goose liver by regulating the SCD1 gene.
【學(xué)位授予單位】:揚(yáng)州大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2015
【分類號】:S835
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