三甲基胺N-氧化物促进PERK介导的内皮细胞-介质细胞过渡和亡,从而加剧动脉样硬化
Wang Bingyu1, Qiu Jun1, Liu Bingyang1
1Department of Cardiovascular, Ningbo Medical Center Lihuili Hospital, Ningbo University, Ningbo, China.
International immunopharmacology
|September 28, 2024
概括
三甲基胺N-氧化物 (TMAO) 通过促进内皮-介质酶过渡 (EndMT) 来恶化动脉样硬化. 准PERK通路可能提供针对TMAO诱导的心血管损伤的治疗策略.
科学领域:
- 心血管生物学 心血管生物学
- 代谢学 代谢学 代谢学
- 分子生物学分子生物学
背景情况:
- 内皮介质转换 (EndMT) 是血管损伤和动脉样硬化 (AS) 发展的关键因素.
- 氧化应激,炎症和亡触发EndMT,加速AS的进展.
- 三甲基胺N氧化物 (TMAO) 是肠道微生物群的代谢物,与各种疾病有关,但其在TGF-β1诱导的EndMT中的作用尚不清楚.
研究的目的:
- 研究TMAO对转化生长因子β1 (TGF-β1) 诱导的EndMT的影响.
- 通过促进EndMT,确定TMAO是否会加剧AS斑块形成和心脏功能障碍.
主要方法:
- 使用ApoE-/-小鼠评估高血清TMAO水平对斑块形成,心脏功能和血液动力学的体内影响.
- 人类大动脉内皮细胞 (HAEC) 用于体外研究,评估TMAO对EndMT标记物,细胞迁移和信号通路的影响.
- 研究了PERK信号通路及其下游分子 (ATF3,ATF4,CHOP) 在TMAO诱导的EndMT中的作用.
主要成果:
- 在ApoE-/-小鼠中的高血清TMAO水平导致斑块形成增加,心脏损伤和血液动力学变化.
- 在体外,TMAO在HAEC中调高了介质细胞标记物和调低了内皮细胞标记物,增强了EndMT细胞迁移.
- 降低PERK调节减轻了TMAO诱导的氧化应激,EndMT,斑块形成和心脏功能障碍.
- 活性转录因子3 (ATF3) 被确定为PERK的下游分子,与TGF-β1/2相互作用,影响EndMT.
结论:
- TMAO促进EndMT,有助于动脉样硬化和心脏功能障碍的进展.
- PERK信号通路,可能通过PERK-eIF2α-ATF4-CHOP或PERK-eIF2α-ATF3-TGF-β通路,调解TMAO的亲EndMT效应.
- 准PERK通路可能是缓解TMAO驱动心血管疾病的新疗法.
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