烯酸氧化酶介导食道上皮质的增殖和分化
Kanak V Kennedy1,2, Joshua X Wang1, Emily McMillan1
1Division of Gastroenterology, Hepatology, and Nutrition, Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA.
Biomolecules
|January 8, 2025
概括
氨酸氧化酶 (LOX) 通过调节细胞增殖和分化,在维持食道上皮质平衡中起着关键作用. 这项研究揭示了LOX.
科学领域:
- 胃肠病学 胃肠病学
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
背景情况:
- 消化管内稳定依赖于基底原生细胞分化成分层状表皮.
- 暴露于酸或炎症会破坏分化,导致基底细胞增生.
- 在食道过敏性炎症期间,酸氧化酶 (LOX) 升高调节,但其非原交联作用尚不清楚.
研究的目的:
- 调查上腺特异性,在维持食道上腺平衡中酸氧化酶 (LOX) 的非法定作用.
- 在体外和体外模型中阐明LOX在调节上皮细胞增殖和分化的作用.
主要方法:
- 在单层和3D有机体培养中利用了通过shRNA的LOX mRNA敲除的人类食道上皮细胞 (EPC2-hTERT).
- 采用了定量逆转录酶PCR,西斑,组织学分析和RNA测序.
- 生成了一种新型的小鼠模型,具有分层表皮特异性,因他莫西芬诱导的Lox淘汰 (K5CreER;Lox).
主要成果:
- LOX knockdown 降低了食道上皮细胞的增殖,并大大降低了有机物形成率 (OFR).
- LOX的淘汰导致分化标记物 (filaggrin,loricrin,involutrin) 的表达减少以及细胞分化途径的下调.
- 皮质特异性Lox淘汰赛小鼠显示,食道中基酸含量增加和扩散减少 (Ki-67染色减少).
结论:
- 氨酸氧化酶 (LOX) 通过调节上皮细胞的增殖和分化来调节食道上皮细胞的恒常性.
- 洛克斯的非正规作用对于维持正常的上皮质结构和功能至关重要.
- 了解LOX在炎症食道中的机制可能会导致促进上皮质愈合的新治疗策略.
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