在2型糖尿病小鼠中,骨髓脂肪细胞衍生的单细胞化疗性蛋白-1的病理作用
Shan Wan1,2, Jinwei Xie3, Yan Liang4
1Laboratory of Endocrinology and Metabolism/Department of Endocrinology and Metabolism, Rare Disease Center, West China Hospital, Sichuan University, Chengdu, China.
Cell death discovery
|November 13, 2023
概括
在2型糖尿病中,骨髓脂肪细胞分泌出多余的MCP-1,损害小岛细胞功能和血糖控制. 阻止这种途径可以改善胰岛素分泌和葡萄糖代谢.
科学领域:
- 内分泌学 在内分泌学.
- 代谢性疾病研究研究
- 细胞生物学 细胞生物学
背景情况:
- 2型糖尿病 (T2DM) 涉及β细胞功能障碍.
- 在T2DM中观察到骨髓脂肪组织 (BMAT) 和单细胞化疗蛋白-1 (MCP-1) 的增加.
- 来自骨髓脂肪细胞 (BMA) 的MCP-1在T2DM发病过程中的作用尚不清楚.
研究的目的:
- 研究来自BMA的MCP-1对T2DM中全身葡萄糖恒温的影响.
- 阐明BMAs影响小岛细胞功能的潜在机制.
主要方法:
- 在对照和T2DM小鼠 (db/db) 中对基因表达的比较分析.
- 评估小岛细胞增殖和葡萄糖刺激胰岛素分泌 (GSIS).
- 在体外研究中,使用BMA衍生条件介质 (CM) 对Min6细胞和MCP-1通路的抑制.
主要成果:
- 在T2DM小鼠中,BMAT增加和Mcp-1基因表达升高.
- 由BMA衍生的CM显著抑制了小岛细胞增殖,GSIS和酸化Akt (p-Akt) 水平.
- 阻断MCP-1通路恢复了p-Akt,小岛细胞增殖,并改善了葡萄糖平衡.
结论:
- 在T2DM中积累的BMA分泌了多余的MCP-1,通过对信号传递加剧了BMA积累.
- 上调的MCP-1通过抑制岛屿细胞增殖和通过内分泌途径分泌胰岛素来恶化葡萄糖代谢.
- 抑制MCP-1信号传递通过改善小岛细胞功能和葡萄糖控制,为T2DM提供了潜在的治疗策略.
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