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PEMT调解了C型肝炎病毒诱导的肥胖症,解释了基因型特定的表型,并支持病毒复制
Mosleh Abomughaid1, Enoch S E Tay1, Russell Pickford2
1Storr Liver Centre, The Westmead Institute for Medical Research, The University of Sydney and Westmead Hospital, Sydney, NSW 2145, Australia.
International journal of molecular sciences
|May 27, 2023
概括
肝炎C病毒 (HCV) 感染通过诱导关键酶酸乙醇胺转移酶 (PEMT) 来增加脂质. 抑制PEMT可降低病毒复制和肝硬化,这解释了基因型特异性疾病的严重程度.
科学领域:
- 肝病学 肝病学是一种肝病学.
- 病毒学 病毒学
- 分子生物学分子生物学
背景情况:
- 型肝炎病毒 (HCV) 利用宿主脂质通路进行复制,并导致肝脏肥胖症.
- 连接HCV感染,脂质新陈代谢和肥胖症的精确分子机制尚不清楚.
研究的目的:
- 阐明细胞脂质通路在HCV复制和肥胖症中的作用.
- 为了研究酸乙醇胺转移酶 (PEMT) 在HCV病变发生过程中的酶.
主要方法:
- 使用高性能薄层染色学 (HPTLC) 和质谱学进行定量脂组学分析.
- 使用亚细胞分离和siRNA介导的基因敲除的HCV细胞培养模型.
- 从HCV感染患者的肝脏活检中分析基因表达.
主要成果:
- 肝炎病毒感染在受感染细胞中显著增加了自由胆固醇和脂胆,特别是在内分泌网膜中.
- 酸丁胆水平的增加归因于通过非正规途径诱导PEMT.
- 通过siRNA介导的PEMT中断抑制了HCV复制,减少了脂质积累,并逆转了相关的基因表达变化.
- 与基因型1和慢性乙型肝炎相比,HCV基因型3感染肝脏中的PEMT表达显著更高.
结论:
- PEMT是一种由HCV诱导的关键酶,促进病毒复制和肝硬化.
- 诱导PEMT促使HCV感染肝细胞中的脂质积累.
- PEMT上调可能解释了在特定的HCV基因型中观察到的肥胖症的患病率增加.
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