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抑制mTORC1通路可以缓解脂肪组织纤维化

Sa Gong^1,2, Chang Li¹, Qingyang Leng¹

¹Department of Endocrinology, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, Shanghai, 200137, China.

|November 30, 2023

概括

通过抑制纤维基因,抑制mTORC1信号传递可以减少肥胖症中的脂肪纤维化. 这一发现为与肥胖相关的代谢功能障碍提供了潜在的治疗点.

科学领域:

生物化学生物化学
分子生物学分子生物学
代谢研究研究代谢研究

背景情况:

脂肪纤维化是脂肪功能障碍和肥胖中的代谢问题的关键驱动因素.
脂肪纤维化背后的精确分子机制在很大程度上是未知的.
这项研究侧重于mTORC1在与肥胖相关的脂肪纤维化中的机制性作用.

研究的目的:

研究mTORC1通路在肥胖引起的脂肪纤维化中的作用.
阐明mTORC1影响脂肪纤维化的分子机制.
评估mTORC1抑制在减轻脂肪纤维化中的治疗潜力.

主要方法:

使用了用拉帕米辛 (mTORC1抑制剂) 或盐水治疗的死后小鼠.
通过细胞外基质沉积评估了皮层脂肪组织 (EAT) 纤维化.
使用RNA-seq分析纤维化的基因表达.
在3T3-L1细胞中使用CoCl2 (低氧) 和TGF-β1诱导的先细胞纤维化.
使用RT-PCR,Western Blot和免疫光学量化纤维化相关的基因和蛋白质表达.

主要成果:

与对照小鼠相比,拉帕米辛治疗显著降低了EAT纤维化和纤维化基因表达在ob/ob小鼠中.
在实验室中,CoCl2诱导的缺氧和TGF-β1有效促进了脂肪细胞纤维化.
拉巴胺抑制mTORC1抑制了纤维化相关基因的上调调节,无论是缺氧还是TGF-β1诱导的纤维化前皮细胞.

结论:

抑制mTORC1通路可以有效地缓解脂肪纤维化.
mTORC1抑制通过降低纤维化相关基因的表达而起作用.
这些发现突出了mTORC1作为脂肪纤维化的一个关键调节器,以及与肥胖相关的代谢功能障碍的潜在治疗目标.

关键词:

脂肪组织纤维化.氧气过低是因为缺氧.拉巴胺素复合体1 (mTOR1) 的机械标在TGF-β1中.

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