弗拉克塔尔金/CX3CR1系统调节β细胞功能和胰岛素分泌
Yun Sok Lee1, Hidetaka Morinaga, Jane J Kim
1Department of Medicine, Division of Endocrinology and Metabolism, University of California, San Diego, La Jolla, CA 92093, USA.
Cell
|April 16, 2013
概括
压素 (FKN) /CX3CR1系统调节胰腺小岛β细胞功能和胰岛素分泌. 损坏的FKN/CX3CR1信号传递有助于2型糖尿病中的β细胞功能障碍.
科学领域:
- 内分泌学 在内分泌学.
- 免疫学 免疫学 免疫学
- 代谢疾病 代谢疾病
背景情况:
- 胰腺小岛β细胞功能障碍是2型糖尿病的核心.
- 在β细胞功能中,碎素 (FKN) /CX3CR1信号通路的作用尚不清楚.
研究的目的:
- 研究FKN/CX3CR1系统在调节胰岛贝塔细胞功能和胰岛素分泌中的作用.
- 探索FKN/CX3CR1信号传导作为2型糖尿病治疗点的潜力.
主要方法:
- 使用CX3CR1淘汰赛 (KO) 小鼠和野生类型 (WT) littermates.
- 在体内和体外评估葡萄糖和GLP1刺激的胰岛素分泌.
- 在体内和体外给予FKN以评估其对葡萄糖耐受性和胰岛素分泌的影响.
- 从KO和WT小鼠的孤立小岛和FKN治疗的WT小岛中分析了基因表达.
主要成果:
- 在CX3CR1 KO小鼠中,葡萄糖和GLP1刺激的胰岛素分泌受损.
- 活体内FKN的使用改善了葡萄糖耐受性和增加了胰岛素分泌.
- 在实验室内对小岛进行FKN治疗,增强了小鼠和人类小岛的细胞内Ca2+) 和潜在的胰岛素分泌.
- 在KO群岛中,关键β细胞功能基因的表达减少,而FKN治疗在WT群岛中增加了它们的表达.
- 岛屿FKN表达随着年龄的增长和高脂肪饮食/肥胖而下降.
结论:
- FKN/CX3CR1系统是胰腺小岛β细胞功能和胰岛素分泌的关键调节者.
- 在衰老和肥胖中观察到的FKN/CX3CR1信号减少可能导致2型糖尿病中的β细胞功能障碍.
- 调节FKN/CX3CR1通路有可能用于治疗2型糖尿病.
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