来自Muribaculum肠道的一种心脂蛋白诱导抗原特异性细胞因子反应
Sunghee Bang1, Yern-Hyerk Shin1, Xiao Ma1,2
1Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School and Blavatnik Institute, Boston, Massachusetts 02115, United States.
Journal of the American Chemical Society
|October 23, 2023
概括
研究人员发现了一种新的肠道微生物代谢物MiCL-1,它显著影响T细胞群. 这种心血管蛋白诱导促炎细胞因子,为宿主-微生物相互作用和免疫反应提供了新的见解.
科学领域:
- 微生物组研究
- 免疫学
- 脂质组学
背景情况:
- 肠道微生物组在调节宿主免疫力方面起着至关重要的作用.
- 识别具有免疫调节作用的特定微生物代谢物对于理解宿主-微生物相互作用至关重要.
研究的目的:
- 识别和描述影响T细胞群的肠道微生物代谢物.
- 阐明一种由*Muribaculum intestinale*产生的新型免疫调节脂质MiCL-1的结构和功能.
主要方法:
- 系统的表型查小鼠肠道微生物代谢物以检测免疫调节作用.
- 确定脂质MiCL-1 (18:1-16:0) 的化学合成,用于结构确认.
- 使用基于细胞的测定来评估细胞因子产生和托尔类受体 (TLR) 的功能性表征.
主要成果:
- 肠道细菌 (Muribaculum intestinale) 被确定为T细胞群的强大的调节者.
- 鉴定出一种新型心脏脂素,即MiCL-1, 是该代谢物,具有严格的结构-活性关系.
- 通过TLR2和TLR1强烈诱导促炎细胞因子 (TNF-α,IL-6,IL-23),而不是TLR6.
结论:
- MiCL-1 是一种由肠道细菌*Muribaculum intestinale*产生的重要免疫调节脂质.
- 这种脂质可选择性地激活促炎途径,突出显示其在肠道免疫力中的潜在作用.
- 这些发现有助于了解特定的微生物脂质如何通过TLR信号影响宿主免疫反应.
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