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来自骨髓细胞的miR-6236增强脂肪细胞的胰岛素信号传递,并在肥胖期间预防高血糖症

Bam D Paneru¹, Julia Chini^1,2, Sam J McCright^1,2

¹Division of Allergy and Immunology, Children's Hospital of Philadelphia, Philadelphia, PA, USA.

Nature communications

|June 25, 2024

概括

肥胖会触发脂肪组织巨细胞 (ATM) 分泌miR-6236,这是一种增强胰岛素敏感性和抗击代谢功能障碍的微RNA. 失去miR-6236会恶化与肥胖相关的代谢问题.

科学领域:

代谢性疾病研究研究.
分子生物学分子生物学
免疫学免疫学免疫学

背景情况:

脂肪组织巨细胞 (ATM) 在与肥胖相关的代谢功能障碍中发挥着关键作用.
人们对ATM影响新陈代谢健康的确切机制尚不完全了解.

研究的目的:

研究ATM分泌的microRNAs在肥胖期间代谢调节中的作用.
确定参与ATM-巨细胞通信的特定微RNA及其对胰岛素敏感性的影响.

主要方法:

在小鼠中利用了miR-6236的遗传删除模型 (全球和髓状细胞特异性).
评估的代谢参数包括胰岛素耐药性,高血糖,高胰岛素血,高脂血.
分析了miR-6236对脂肪细胞胰岛素信号通路的影响,包括PTEN调节.
在人类血清和肥胖个体的脂肪组织样本中,与代谢标志物相关的hsa-MIR-6236表达.

主要成果:

miR-6236是一种在肥胖期间由ATM分泌的miRNA.
删除miR-6236加剧了脂肪组织的胰岛素耐药性,高血糖,高胰岛素和高脂血症.
miR-6236通过抑制胰岛素信号传递的负调节者,如PTEN,增强脂肪细胞的胰岛素敏感性.
人类miR-6236同源物 (hsa-MIR-6236) 在肥胖个体上升调,与高血糖反向相关,与胰岛素敏感性正相关.

结论:

miR-6236是一种ATM衍生的miRNA,可以改善脂肪细胞的胰岛素信号传递.
这种miRNA作为一种保护因素,防止肥胖的代谢功能障碍.
向miR-6236可能为与肥胖相关的代谢障碍提供治疗策略.

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