微生物丁酸盐修改了黑色素通过抑制GPR109A/Caspase-1-依赖性巨M1极化缓解结肠炎症
Xinyu Shao1,2, Xiuwei Mi1, Xiaoyi Kuai2
1Department of General Surgery, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215000, China.
Journal of proteome research
|March 5, 2025
概括
黑素通过增强肠道细菌多样性和丁酸盐生产来缓解性结肠炎 (UC). 这通过NLRP3通路减少炎症,为急性UC提供了潜在的新治疗方法.
科学领域:
- 胃肠病学 胃肠病学
- 微生物组研究 微生物组研究
- 免疫学 免疫学 免疫学
背景情况:
- 复发性性结肠炎 (UC) 显著影响患者的生活质量.
- 黑素影响肠道微生物群,并具有与肠道疾病相关的抗炎性质.
研究的目的:
- 在UC的小鼠模型中研究黑激素对肠道炎症的治疗作用.
- 阐明涉及肠道微生物群和炎症通路的潜在机制.
主要方法:
- 利用UC的小鼠模型,给出黑激素并评估临床结果.
- 使用16S-rRNA测序和GC-MS分析肠道微生物群和代谢物.
- 在小鼠和人类UC组织中检查了NLRP3炎症酶和GPR109A表达.
- 通过使用广谱抗生素 (ABX) 调查肠道微生物群的作用.
主要成果:
- 在小鼠中,氨酸治疗缓解了肠道炎症和体重减轻.
- 黑色素增加了肠道微生物群的多样性和短链脂肪酸生产细菌的丰富性,促进了丁酸盐的分泌.
- 丁酸盐通过减少caspase-1和IL-1β分泌来抑制NLRP3介导的炎症.
- 在活跃的UC患者中,NLRP3表达升高,GPR109A降低,与CRP和ESR相关.
- 肠道微生物群的抗生素破坏取消了黑激素的抗炎作用.
结论:
- 黑色素通过调节肠道微生物群和NLRP3/caspase-1信号通路来改善小鼠的UC.
- 该机制涉及促进丁酸盐的生产和影响巨细胞的两极分化.
- 这些发现表明,黑激素是急性UC的潜在治疗剂.
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