饮食诱导的胰岛素抵抗是由于诱导PTEN表达的原因
Neal Rosen1, Radha Mukherjee1, Priya Pancholi1
1Memorial Sloan Kettering Cancer Center.
Research square
|July 9, 2024
概括
2型糖尿病 (T2D) 涉及胰岛素耐药性,高胰岛素触发PTEN蛋白质的产生. 这种PTEN增加抑制PI3K信号传递,导致高血糖和T2D症状.
科学领域:
- 分子生物学分子生物学
- 内分泌学 在内分泌学.
- 代谢性疾病是一种代谢性疾病.
背景情况:
- 2型糖尿病 (T2D) 的特点是胰岛素抵抗,高胰岛素血和高血糖.
- 驱动胰岛素耐药性的精确分子机制仍然不完全理解.
- 胰岛素信号涉及PI3K通路的激活和PTEN翻译的mTOR-依赖调节.
研究的目的:
- 调查PTEN (酸酶和素同源) 在饮食引起的肥胖和胰岛素耐药性中的作用.
- 阐明胰岛素水平,PTEN诱导和T2D表型的发展之间的关系.
- 在T2D的临床前模型中评估针对PTEN或mTORC1的治疗策略.
主要方法:
- 利用饮食诱导的肥胖小鼠模型研究胰岛素抵抗.
- 在关键代谢组织 (脂肪,肌肉,肝脏) 中量化的PTEN蛋白水平.
- 服用PTEN酸酶抑制剂和mTORC1激酶抑制剂,以评估它们对T2D表型的影响.
主要成果:
- 在肥胖小鼠的脂肪,肌肉和肝脏组织中观察到PTEN水平的增加.
- 超胰岛素血症和PTEN诱导之前的高血糖症,肝硬化和葡萄糖不耐受.
- PTEN抑制可以预防和逆转T2D表型;mTORC1抑制可以逆转除了肝硬化症以外的所有症状.
结论:
- 胰岛素诱导的PTEN升高通过过度抑制PI3K信号传递,导致胰岛素抵抗.
- PTEN诱导是胰岛素耐药性和T2D病变的关键因素.
- 针对PTEN是T2D治疗的一个有前途的治疗策略.
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