血管新生素-4的双重功能诱导肠道干细胞和亡
Hirohito Abo1, Mst Farzana Sultana1,2, Hiroto Kawashima1
1Laboratory of Microbiology and Immunology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, Japan.
Frontiers in cell and developmental biology
|November 29, 2023
概括
血管新生-4 (Ang4) 维护肠道干细胞 (ISC),并通过激活Wnt和Notch信号来促进它们的扩张. 高度的Ang4诱导肠上皮细胞 (IEC) 亡,揭示了其在肠道平衡中的双重作用.
科学领域:
- 胃肠病学和肝病学
- 细胞生物学 细胞生物学
- 微生物学 微生物学
背景情况:
- 肠道上皮依赖于可溶性密码的利基因素来维持恒温.
- 抗微生物蛋白,如血管原蛋白-4 (Ang4),对于保持肠道健康至关重要.
- Ang4在肠上皮细胞 (IEC) 发育和密室中的特定作用以前是未知的.
研究的目的:
- 为了研究肠道密室内的angiogenin-4 (Ang4) 的功能.
- 确定Ang4在肠上皮细胞 (IEC) 和肠干细胞 (ISC) 发育和维持中的作用.
- 为了阐明受Ang4在肠道中影响的信号通路.
主要方法:
- 分析帕内斯细胞和杯状细胞中的Ang4表达.
- 使用肠道有机体和IEC细胞系进行的功能研究.
- 对Wnt和Notch信号通路的评估.
- 对Lgr5+干细胞扩张和IEC亡的评估.
主要成果:
- 帕内斯细胞 (小肠) 和表达Reg4的杯细胞 (结肠) 高度表达Ang4,两者都对ISC维护有贡献.
- 通过诱导Wnt和Notch信号,Ang4促进Lgr5+ISC扩张和有机体生长.
- Ang4以度依赖的方式诱导IEC亡.
结论:
- 血管原蛋白-4 (Ang4) 是一种双重功能蛋白质,对肠道平衡至关重要.
- Ang4作为一个新的密码利基因素,促进ISC扩张和诱导IEC亡.
- 了解Ang4的功能,可以了解肠道发育和疾病.
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