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基拉托坎阴性细胞的核心在旧的角膜痕中存活下来
Hadi Joud1, Meisam Asgari2, Victoria Emerick1
1Department of Ophthalmology, USF Health Morsani College of Medicine, University of South Florida, Tampa, Florida.
The American journal of pathology
|November 20, 2024
概括
角膜痕显示持续的纤维细胞和肌纤维细胞表型,即使在成熟的痕中. 这些细胞无法恢复到角质细胞或被清除,这表明角膜伤口愈合的阻塞.
科学领域:
- 眼科医生 眼科 眼科
- 细胞生物学 细胞生物学
- 组织工程是组织工程.
背景情况:
- 角膜痕是由纤维细胞和肌纤维细胞活动引起的.
- 这些细胞通常会经历亡或恢复为角质细胞.
- 了解痕成熟对于改善角膜伤口愈合至关重要.
研究的目的:
- 为了研究角膜痕成熟期间的细胞表型动态.
- 为了确定成熟的角膜痕内的细胞的持久性和表型.
- 为了阐明防止状细胞在痕中重新繁殖的因素.
主要方法:
- 使用KeraRT/tetO-Cre/mTmG (I-KeramTmG) 鼠标模型进行血统追踪.
- 在受伤后的3,6个月和10个月诱导全厚角质切割和分析痕.
- 采用了EDU标签,Ki-67染色和第二波代显微镜.
主要成果:
- 在3个月和6个月的痕中观察到很少的角质细胞 (绿细胞),而在中央痕中没有.
- 在10个月时,痕中大多含有非角质细胞 (红细胞),只有很少的角质细胞.
- 细胞增殖仅在受伤后的前两周内发生.
- 成熟的痕显示出异常的原组织和持久的非细胞表型.
结论:
- 成熟的角膜痕含有持久性纤维细胞/肌纤维细胞表型.
- 异常的细胞外基质和细胞特征可能会抑制角质细胞回归或侵入.
- 这表明角膜创伤的自然解决过程中出现了故障.
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