In bell stage ( E19), the positive staining was detected in both inner and outer enamel epithelium, but the inner was less than that of the outer and less positive staining was also found in the cells of stratum intermedium and stellate reticulum. 钟状期(胚胎19d),内、外釉上皮阳性表达,但内釉上皮较外釉上皮表达弱,中间层及星网状层细胞弱阳性表达;
It was expressed focally in the oral epithelium, dental lamina, outer enamel epithelium, stratum intermedium and stellate reticulum at cap and bell stages. 结果:COX-2在牙胚发育期间存在特异的时空分布模式,其阳性表达主要在牙胚发育帽状期、钟状期的口腔上皮、牙板上皮、外釉、中间层和星网状层。
CONCLUSION: At onset of HERS, the inner enamel epithelium, outer enamel epithelium embrace several cells with developed cytoplasmic organelles, which may derive from stratum intermedium or stellate reticulum, and form a structure like enamel organ, which may be associated with initial cementogenesis. 结论:上皮根鞘发生时,内、外釉上皮间可包容个别源于网状层或中间层、细胞器丰富的细胞,从而形成类似成釉器的结构。
BMP was expressed in the ameloblast, the intermedium stratum cell and the stellate reticulum cell but not in dental papillae cells or odontoblast. 成釉细胞,中间层细胞和星网状层细胞均有BMP表达,牙乳头细胞或成牙本质细胞不表达BMP。