先进的糖化最终产品加速了脂肪细胞的脂质滴中的粉样蛋白沉积物
Roza Izgilov1, Nadav Kislev1, Eman Omari1
1Department of Cell and Developmental Biology, Faculty of Medical and Health Sciences, Tel Aviv University, Tel Aviv, Israel.
Cell death & disease
|November 20, 2024
概括
碳基代谢物升高会导致脂肪细胞中的蛋白质糖化和粉样蛋白形成,损害胰岛素耐药性和2型糖尿病 (T2D) 的进展. 甲胺对蛋白质错折和自产生有益影响.
科学领域:
- 生物化学 生物化学
- 代谢疾病 代谢疾病
- 细胞生物学 细胞生物学
背景情况:
- 脂肪组织功能障碍是胰岛素抵抗和2型糖尿病 (T2D) 的关键因素.
- 碳基代谢物增加,如甲基素 (MGO) 和糖 (GAD),与T2D有关.
- 这些代谢物诱导蛋白质糖化,导致错误折叠,先进的糖化最终产品 (AGE) 形成,以及损害脂肪细胞功能.
研究的目的:
- 研究MGO和GAD如何影响脂肪细胞中的蛋白质结构和功能.
- 为了检查脂肪细胞中糖化和氨基原蛋白的形成.
- 评估甲胺 (MET) 对脂肪细胞中蛋白质错折和自的治疗作用.
主要方法:
- 在体外研究中使用MGO和GAD来诱导脂肪细胞中的蛋白质糖化.
- 微观和光谱分析 (包括硫黄素光谱) 来评估蛋白质错折和AGE.
- 进行LC3染色以评估自.
- 在体内分析白色脂肪组织 (WAT).
- 生物信息学,成像学,生物化学和MS/MS方法分析脂质滴相关蛋白质,特别是脂肪三糖 lipase (ATGL).
主要成果:
- MGO和GAD治疗导致蛋白质糖化,错误折叠,β片形成和AGE,损害脂肪细胞活性.
- 在暴露于碳烯化合物的脂肪细胞中观察到氨基原蛋白质的形成.
- 甲胺通过减少错误折叠的蛋白质和改善自学来表现出有益的作用.
- 在体内研究中,在WAT中发现了与ATGL相关的β-粉样沉积物.
- 证实ATGL是有糖的,并且参与β-sheet的二次结构形成.
结论:
- 脂肪细胞中的蛋白质糖化和氨基基生成,由碳基代谢物驱动,有助于T2D病理生理学.
- 脂肪细胞功能障碍,以错误折叠和聚合的蛋白质为特征,在代谢变化中起着重要作用.
- 向脂肪细胞为T2D,粉样化和相关代谢障碍提供了潜在的治疗策略.
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