调节β-Catenin促进巨细胞中的WNT表达,并减轻肠道损伤
Rishi Man Chugh1, Payel Bhanja1, Ryan Zitter1
1Department of Radiation Oncology, University of Kansas Medical Center, Kansas City, KS, 66160, USA.
Cell communication and signaling : CCS
|February 11, 2025
概括
激活巨细胞中的β-catenin信号,可以抑制WNT的表达. 然而,工程化巨细胞及其细胞外囊泡 (EVs) 促进肠干细胞再生并治愈肠损伤.
科学领域:
- 免疫学 免疫学 免疫学
- 干细胞生物学 干细胞生物学
- 胃肠病学 胃肠病学
背景情况:
- 巨细胞是WNT配体的主要来源,对于细胞信号传递至关重要.
- 巨细胞中WNT表达的调节仍然在很大程度上没有特征.
- 发现,正规的β-catenin信号激活可以抑制巨细胞中的WNT表达.
研究的目的:
- 调查β-catenin信号传递在调节巨细胞中WNT表达中的作用.
- 探索WNT表达性巨细胞及其细胞外囊泡 (EVs) 在治疗肠道损伤中的治疗潜力.
主要方法:
- ChIP-seq和 luciferase 记者测试以评估β-catenin在WNT转录调节中的作用.
- 坦基拉酶的药理抑制和巨细胞中β-catenin的遗传删除.
- 使用小鼠模型 (辐射,DSS诱导的大肠炎) 的体内研究来评估巨细胞衍生的EVs用于肠道修复和干细胞再生.
主要成果:
- β-catenin在物理上与WNT促进体结合,抑制WNT的表达.
- 宏细胞特异性β-catenin删除或tankyrase抑制显著增加了WNT表达.
- 来自WNT丰富的巨细胞的EV促进了肠道干细胞的再生,并减轻了辐射诱导和DSS诱导的结肠炎损伤.
结论:
- 正规WNT信号的巨细胞向调制有效诱导WNT的表达.
- 从预先条件化的巨细胞中获得的富含WNT的EVs代表了对肠道损伤的有前途的治疗策略.
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