纤维细胞生长因子21 (FGF21) 通过转录因子EB (TFEB) 调节的脂质缩来减弱塔克罗利斯诱导的肝脂积累
Zhensheng Zhang1,2,3,4,5, Li Xu6,3,4,5, Xun Qiu1,2,3,4,5
1Zhejiang University School of Medicine, Hangzhou 310058, China.
Journal of Zhejiang University. Science. B
|June 13, 2023
概括
塔克罗利 (TAC) 通过降低纤维细胞生长因子21 (FGF21) 的调节,导致高脂血症,从而损害了自-溶解体通路. 再组合的FGF21蛋白通过增强自逆转这种脂质积累和高甘油三血症.
科学领域:
- 免疫学 免疫学 免疫学
- 代谢研究研究 代谢研究
- 移植医学 移植医学
背景情况:
- 塔克罗利马斯 (TAC) 对于预防肝移植后的异种移植体排斥至关重要.
- TAC与移植后的高脂血症有关,但潜在的机制尚不清楚.
- 迫切需要有效的策略来预防TAC诱导的高脂血症.
研究的目的:
- 为了研究TAC诱导的高脂血症的机制.
- 探索纤维细胞生长因子21 (FGF21) 和自-溶酶体通路在TAC诱导的脂质代谢障碍中的作用.
- 评估FGF21在改善TAC诱导的高脂血症方面的治疗潜力.
主要方法:
- 建立了一个超脂血症小鼠模型,通过在8周内内皮管内注射TAC.
- 评估的脂质概况 (三甘油,LDL-c,HDL-c) 和肝脂滴积累.
- 分析了自酶体通路标记物 (LC3B,TFEB,P62,LAMP1) 和FGF21水平.
- 研究了复合FGF21蛋白治疗对TAC诱导的脂质积累和高脂血的作用.
主要成果:
- TAC治疗诱导高脂血症,导致甘油三和LDL-c的升高,以及HDL-c的降低.
- 在TAC治疗小鼠的肝脏中观察到显著的脂质滴积累.
- 在体内,TAC抑制了自-溶酶体通路,并降低了FGF21表达的调节.
- 重组FGF21蛋白通过恢复自-溶酶体通路改善了肝脏脂质积累和高脂血症.
结论:
- 塔克罗利木斯 (TAC) 通过降低纤维细胞生长因子21 (FGF21) 的调节来加剧脂质积累,从而损害了自-溶解体通路.
- 再组合的FGF21蛋白显示出治疗潜力,通过增强自,扭转TAC诱导的脂质积累和高甘油三血症.
- 准FGF21-自轴可能为治疗移植后高脂血症提供一种新的策略.
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