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伊诺西聚酸多基因酶调节小鼠初级肝细胞中自由脂肪酸诱导的胰岛素抵抗

Ik-Rak Jung¹, Rexford S Ahima¹, Sangwon F Kim¹

¹Department of Medicine, Division of Endocrinology, Diabetes and Metabolism, Johns Hopkins University, Baltimore, Maryland, USA.

Journal of cellular biochemistry

|October 5, 2023

概括

过多的自由脂肪酸 (FFA) 降低了内醇聚酸多酶 (IPMK) 表达,导致胰岛素耐药性和非酒精性脂肪肝疾病 (NAFLD) 的发展. IPMK是NAFLD的潜在治疗标.

科学领域:

肝病学肝病学是一种肝病学.
代谢性疾病代谢性疾病
分子生物学分子生物学

背景情况:

胰岛素耐药性是非酒精性脂肪肝 (NAFLD) 病原体的核心.
肝脏中过多的自由脂肪酸 (FFA) 与胰岛素耐药性和NAFLD有关,但分子机制尚不清楚.

研究的目的:

研究伊诺西聚酸盐多酶 (IPMK) 在初级肝细胞中FFA诱导的胰岛素抵抗中的作用.
阐明连接FFA,IPMK和胰岛素信号的分子机制.

主要方法:

主要小鼠肝细胞 (PMH) 用多余的FFA进行了治疗.
评估了IPMK表达,Akt酸化和胰岛素信号传递.
实验涉及IPMK淘汰/过度表达,蛋白质体抑制 (MG132) 和抗氧化剂治疗 (NAC).

主要成果:

过多的FFA降低了PMH中的IPMK表达.
阻断IPMK减少减弱了FFA诱导的Akt酸化抑制.
过度表达的IPMK保护了FFA诱导的胰岛素耐药性,而IPMK淘汰则加剧了这种情况.
MG132和NAC治疗调节了IPMK表达和Akt酸化以应对FFA.

结论:

过多的FFA降低了IPMK的表达,导致肝细胞中的Akt酸化和胰岛素抵抗受损.
这些发现确定IPMK是FFA诱导的胰岛素耐药性的关键参与者,也是NAFLD潜在的治疗点.

关键词:

标签: 活动活动活动自由脂肪酸 (FFA) 的使用伊诺西聚酸盐多酶 (IPMK) 是一种胰岛素耐药性是一种胰岛素耐药性.主要小鼠肝细胞 (PMH)

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