通过SLC13A3吸收伊塔科纳酸可以改善肝脏抗菌天生的免疫力
Chao Chen1, Caiyun Liu2, Pengkai Sun2
1Key Laboratory of Epigenetic Regulation and Intervention, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China.
Developmental cell
|August 8, 2024
概括
细胞外伊塔科纳酸盐是一种免疫调节代谢物,通过溶解物载体家族13成员3 (SLC13A3) 载体输入肝细胞. 这种吸收增强了肝脏的功能.
科学领域:
- 免疫学 免疫学 免疫学
- 代谢学 代谢学 代谢学
- 细胞生物学 细胞生物学
背景情况:
- 伊塔科纳酸是一种免疫调节代谢物,由巨细胞中的IRG1产生.
- 细胞外伊塔科纳酸盐被非骨髓细胞吸收的机制尚不清楚.
- 了解伊塔科纳酸在非骨髓细胞中的作用对于其治疗潜力至关重要.
研究的目的:
- 为了确定负责非骨髓细胞中伊塔科纳酸的吸收的载体.
- 为了研究这种载体在肝脏抗菌天生的免疫力中的作用.
- 阐明itaconate增强肝细胞免疫反应的分子机制.
主要方法:
- 定制设计的CRISPR屏幕用于识别itaconate进口商.
- 产生肝脏特异性的Slc13a3淘汰小鼠.
- 在体内和体外测试以评估肝脏抗菌天生的免疫力.
- 对转录因子EB (TFEB) 激活和溶酶体生物发生的分析.
主要成果:
- 溶性载体家族13成员3 (SLC13A3) 被确定为一个主要的伊塔科纳特进口商.
- 对Slc13a3的肝脏特异性删除损害了肝脏抗菌天生的免疫力.
- 在小鼠肝细胞中,通过SLC13A3诱导的Itaconate吸收诱导了TFEB依赖的溶酶体生物发生.
- 增强的溶酶体功能改善了抗菌天生的免疫力.
结论:
- 在小鼠肝细胞中,SLC13A3是关键的伊塔康酸进口物.
- 通过SLC13A3介导的伊塔科纳酸的摄入,通过TFEB驱动的溶酶体生物发生增强了肝脏抗菌天生的免疫力.
- 这些发现支持开发用于细菌感染的基于伊塔科纳酸的治疗方法.
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