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- 2016
O-GlcNAc对上唇发育过程中上皮间叶转化影响的研究
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Abstract:
摘要 目的: 研究氧联乙酰葡萄糖胺(O-linked N-acetylglucosamine,O-GlcNAc)在上唇发育过程中对面突间上皮间叶转化的影响。方法: 通过在鸡胚上唇植入浸有O-GlcNAc促进剂 OGT(O-GlcNAc transferase)、O-GlcNAc 的抑制酶OGA(O-GlcNAcase)、以及OGA的抑制剂STZ(streptozoticin)的琼脂糖微球,构建O-GlcNAc高表达与低表达以及反向高表达实验组并继续孵育24 h,茜素红/阿利新蓝骨组织染色观察胚胎骨、软骨发生的变化,免疫组化染色法检测具有间叶组织表达特异性的fibronectin和上皮表达特异性的p63的表达状态。结果: 高表达O-GlcNAc实验组OGT和STZ中,发现胚胎上唇出现了骨缺损,且P63、fibronectin持续高表达,上皮、间叶组织保持连续性,凋亡出现延迟,上皮间叶转化出现障碍。正常对照测与低表达OGA组在上皮融合过程中P63表达减弱,fibronectin在上皮中出现表达,上皮层出现断裂,表明上皮间叶转化的正常进行。 结论: O-GlcNAc过表达对于上唇形成过程中上皮间叶转化具有负面作用,将影响上唇的正常发育并可能导致唇裂的发生
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