MicroRNA-33 and the SREBP host genes cooperate to control cholesterol homeostasis.

MicroRNA-33 and the SREBP host genes cooperate to control cholesterol homeostasis.
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DOI:
10.1126/science.1189123
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发表时间:
2010-06-18
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Näär AM
Näär AM
中科院分区:
其他
文献类型:
--
作者:
Najafi-Shoushtari SH;Kristo F;Li Y;Shioda T;Cohen DE;Gerszten RE;Näär AM

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胆固醇生物合成和运输的适当协调对人类健康至关重要。固醇调节元件结合蛋白(SREBP)是参与胆固醇生物合成/摄取的基因的关键转录调节因子。我们在这里显示,嵌入SREBP基因内含子内的microRNA(miR-33 a/B)靶向ATP结合盒转运蛋白A1(ABCA 1),这是高密度脂蛋白(HDL)合成和胆固醇反向转运的重要调节因子,用于转录后抑制。反义抑制细胞系中的miR-33导致ABCA 1表达上调和胆固醇流出增加,并且用锁核酸(LNA)反义寡核苷酸注射西式饮食的小鼠导致血浆HDL升高。总的来说,我们的研究结果表明,miR-33与SREBP宿主基因协同作用以控制胆固醇稳态,并表明miR-33可能代表改善心脏代谢疾病的治疗靶点。
Proper coordination of cholesterol biosynthesis and trafficking is essential to human health. The sterol regulatory element binding proteins (SREBPs) are key transcription regulators of genes involved in cholesterol biosynthesis/uptake. We show here that microRNAs (miR-33a/b) embedded within introns of the SREBP genes target the ATP-binding cassette transporter A1 (ABCA1), an important regulator of high-density lipoprotein (HDL) synthesis and reverse cholesterol transport, for post-transcriptional repression. Antisense inhibition of miR-33 in cell lines causes upregulation of ABCA1 expression and increased cholesterol efflux, and injection of mice on a western-type diet with locked nucleic acid (LNA)-antisense oligonucleotides results in elevated plasma HDL. Collectively, our findings indicate that miR-33 acts in concert with the SREBP host genes to control cholesterol homeostasis, and suggest that miR-33 may represent a therapeutic target for ameliorating cardiometabolic diseases.
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