RasGRP4通过Aloxe3-介导的氧化应激和痕相关的巨细胞激活来加剧糖尿病纤维化
Binshan Zhang1, Jian Wang1,2, Ashanjiang Aniwan1,3
1NHC Key Lab of Hormones and Development and Tianjin Key Lab of Metabolic Diseases, Tianjin Medical University Chu Hsien-I Memorial Hospital & Institute of Endocrinology, Tianjin, China.
概括
拉斯瓜核酸释放蛋白4 (RasGRP4) 通过激活痕相关的巨细胞,驱动糖尿病病中的纤维化. 抑制RasGRP4或其下游标Aloxe3,可以减少氧化应激和纤维化,提供新的治疗途径.
科学领域:
- 腎臟病學 (nephrology) 是一種醫學.
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
背景情况:
- 糖尿病病 (DKD) 的特征是不可逆转的纤维化.
- 巨细胞表型调节是DKD的一个潜在的治疗策略.
- 拉斯关氨酸核酸释放蛋白4 (RasGRP4) 与免疫调节有关.
研究的目的:
- 研究RasGRP4在DKD相关纤维化中的作用.
- 为了确定RasGRP4是否调节与痕相关的巨细胞 (SAM).
主要方法:
- 来自糖尿病患者的活检组织和外周血液单核细胞 (PBMC) 的分析.
- 使用RasGRP4淘汰赛小鼠构建DKD小鼠模型.
- PBMCs的转录基因测序. PBMCs. 的转录基因测序.
- 在体外巨体实验.
主要成果:
- 在纤维化脏中,RasGRP4表达性巨细胞更为普遍,RasGRP4水平与蛋白尿相关.
- 拉斯GRP4淘汰赛减少了脏间歇性纤维化,并降低了下游基因阿拉基多酸脂氧酶3 (Aloxe3) 的下调.
- 阿洛克斯3促进了氧化应激,SAM透 (Trem2+SPP1+) 和纤维介质释放.
- 在巨细胞中抑制RasGRP4或Aloxe3降低了氧化应激和SAM相关的纤维化标志物.
结论:
- RasGRP4 是糖尿病纤维化的关键调解剂.
- RasGRP4通过Aloxe3介导的氧化应激促进SAM的激活.
- 向RasGRP4或Aloxe3为DKD提供了一个新的治疗策略.
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