LEPIS-HuR-TMOD4轴调节肝脏胆固醇平衡,并加速动脉样硬化
Ping LYu1, Hangyu Pan2, Kexin Hu2
1Department of Cardiovascular Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, China.
Atherosclerosis
|April 25, 2024
概括
这项研究确定了一种新的长非编码RNA,LEPIS,通过破坏肝脏胆固醇来加剧动脉样硬化. 准LEPIS-HuR-TMOD4通路可能会减少胆固醇和动脉斑块.
科学领域:
- 分子生物学分子生物学
- 心血管研究研究心血管研究
- 在RNA生物学,RNA生物学.
背景情况:
- 动脉样硬化 (AS) 是一种由脂质失调驱动的慢性炎症性疾病.
- 长非编码RNAs (lncRNAs) 越来越多地被认可为它们在AS病变发生中的作用.
- 在AS中,许多lncRNAs (包括LEPIS) 的特定功能仍然未被描述.
研究的目的:
- 为了识别和表征一种新的lncRNA,肝脏表达由PSRC1特别诱导 (LEPIS).
- 阐明LEPIS影响动脉样硬化 (AS) 的分子机制.
- 研究LEPIS在肝脏胆固醇代谢中的作用及其作为治疗点的潜力.
主要方法:
- 使用了一种食高脂肪饮食的ApoE-/-小鼠模型来研究动脉样硬化.
- 在小鼠肝脏中过度表达的LEPIS和4 (TMOD4),以评估它们对AS和胆固醇的影响.
- 分析了大动脉斑块负荷,血脂水平和肝脏胆固醇代谢.
- 使用分子生物学技术研究了LEPIS,HuR (人类抗原R) 和TMOD4mRNA稳定性之间的相互作用.
主要成果:
- 在高脂肪饮食养的ApoE-/-小鼠中,LEPIS和TMOD4表达都升高,并加剧了AS.
- 莱皮斯和TMOD4降低了肝脏胆固醇水平,并影响了调节胆固醇平衡的基因,包括PCSK9和LDLR.
- 通过促进HuR的核至细胞质转运,LEPIS促进TMOD4的表达,提高TMOD4mRNA的稳定性.
- TMOD4通过PCSK9影响细胞内胆固醇水平,将LEPIS与高胆固醇血症联系起来.
结论:
- LEPIS-HuR-TMOD4轴被确定为肝脏胆固醇恒温的关键调节器.
- 这一途径代表了干预失调的胆固醇代谢的潜在治疗标.
- 针对LEPIS-HuR-TMOD4轴可能提供一种减少LDL-C度和动脉斑块负担的策略.
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