激活ATF6会改变结肠脂质代谢,导致与瘤相关的微生物适应
Olivia I Coleman1, Adam Sorbie1,2, Alessandra Riva1
1Chair of Nutrition and Immunology, School of Life Sciences, Technische Universität München, Freising-Weihenstephan, Munich, Germany.
Nature metabolism
|September 1, 2025
概括
激活转录因子6 (ATF6) 通过改变脂质代谢和选择促进瘤的肠道细菌来促进结直肠癌. 这种内质网膜应激反应与脂肪酸生物合成和癌症发展中的微生物变化有关.
科学领域:
- 分子生物学
- 癌症研究
- 微生物学
- 代谢学
背景情况:
- 细胞内的蛋白质反应与癌症的发展有关.
- 激活转录因子6 (ATF6) 在微生物群依赖的瘤发生中起作用.
研究的目的:
- 研究ATF6在早期和晚期结直肠癌中的临床相关性.
- 将ATF6信号与脂质代谢和肠道微生物群的变化联系起来.
- 阐明ATF6影响瘤发生的机制.
主要方法:
- 在ATF6转基因小鼠 (nATF6IEC) 中进行转录分析以确定细菌特异性的代谢变化.
- 在人体,小鼠和器官结肠组织中进行非目标代谢和同型标记.
- 在无菌 nATF6IEC小鼠中进行脂肪酸合成酶 (FASN) 抑制和微生物群转移实验.
- 生物对等非规范性氨基酸标记和生长分析,以将微生物种类与脂质暴露联系起来.
主要成果:
- ATF6信号与肠道上皮细胞脂肪酸生物合成的显著变化有关.
- 在各个物种和有机体的结肠组织中证实了长链脂肪酸的丰富.
- 正如FASN抑制和微生物群转移所示,ATF6诱导的脂质变化有助于瘤发生.
- 特定的微生物种群,如*Desulfovibrio fairfieldensis*,被选择性地扩展并与长链脂肪酸暴露有关.
结论:
- 慢性ATF6信号在结直肠癌中具有临床意义.
- 通过ATF6信号改变脂质代谢,促进瘤形成.
- 通过脂质代谢的改变,ATF6信号选择促进瘤的肠道微生物群.
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