中央葡萄糖类1受体激活抑制了托尔类受体激动剂诱导的炎症
Chi Kin Wong1, Brent A McLean1, Laurie L Baggio1
1Lunenfeld-Tanenbaum Research Institute, Sinai Health System, Toronto, ON, Canada.
Cell metabolism
|December 19, 2023
概括
类似葡萄糖-1受体激动剂 (GLP-1RAs) 通过激活中枢神经元受体而不是免疫细胞来减少系统性炎症. 这种肠-大脑轴机制抑制了毒症和2型糖尿病并发症等疾病的炎症反应.
科学领域:
- 免疫学 免疫学 免疫学
- 神经科学是一个神经科学.
- 内分泌学 在内分泌学.
背景情况:
- 已知类似葡萄糖-1受体激动剂 (GLP-1RAs) 能够减少炎症,特别是在2型糖尿病中.
- GLP-1RAs抑制系统性炎症的确切机制,特别是当免疫细胞不能广泛表达GLP-1受体时,仍然不清楚.
研究的目的:
- 研究中枢神经元GLP-1受体在调解GLP-1RAs抗炎作用中的作用.
- 阐明参与GLP-1RA介导的全身炎症抑制的信号通路.
主要方法:
- 使用GLP-1RAs激活GLP-1受体.
- 托尔类受体激活剂的使用以诱导炎症.
- 使用多微生物败血症的 cecal slurry 模型.
- 研究血造,内皮和神经元GLP-1受体的参与.
- 分析下游信号通路,包括上腺和阿片类受体.
主要成果:
- GLP-1受体激活减弱了托尔类受体激活剂诱导血瘤亡因子α (TNF-α) 的作用.
- 这些抗炎作用独立于造血或内皮GLP-1受体,但需要中枢神经元GLP-1受体.
- 在败血症模型中,GLP-1RAs需要神经元GLP-1受体来减少疾病,低温,全身炎症和肺损伤.
- GLP-1R激活通过α1-上腺素,δ-片类和k-片类受体信号传递减少了TNF-α.
结论:
- GLP-1受体激动剂通过涉及中枢神经元GLP-1受体的肠-大脑轴抑制系统性炎症.
- 这种机制对于减轻败血症和潜在的慢性疾病 (如2型糖尿病) 的炎症反应至关重要.
- 这些发现突出了通过脑免疫相互作用控制外周炎症的新途径.
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