Regulation of microRNA-33, SREBP and ABCA1 genes in a mouse model of high cholesterol

Zhang, Xianglun; Zhao, Hongbo; Sheng, Qingkai; Liu, Xiaomu; You, Wei; Lin, Haichao; Liu, Guifen

MicroRNAs are short non-coding RNAs that regulate gene expression. Several microRNAs, useful for coronary artery disease assessment, have previously been identified. MicroRNA-33 is located within SREBP introns and controls cholesterol homeostasis. In order to find the possibility of microRNA-33 as a potential biomarker in high cholesterol disease, we developed a mouse model for coronary heart disease by feeding mice with a high-fat diet. The expression differences of microRNA-33, SREBP and ABCA1 genes in the liver, muscle, and lipid tissues were compared between a high-cholesterol group and control group in mice. The results showed that ABCA1 was up-regulated by high cholesterol conditions in liver, muscle and lipid tissues. SREBP1C was up-regulated by high cholesterol conditions in the liver and lipid tissues and down-regulated by high cholesterol conditions in the muscle tissue. MicroRNA-33 and SREBP2 were down-regulated by high cholesterol conditions in the liver and muscle tissues and up-regulated by high cholesterol conditions in the lipid tissue. Our study suggests that antisense therapeutic targeting of microRNA-33 may be a potential biomarker for cardiovascular disease.

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Zhang, Xianglun / Zhao, Hongbo / Sheng, Qingkai / et al: Regulation of microRNA-33, SREBP and ABCA1 genes in a mouse model of high cholesterol. 2021. Copernicus Publications.

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