alexa Expression of podoplanin in the mouse tooth germ and apical bud cells.
Pathology

Pathology

Journal of Clinical & Experimental Pathology

Author(s): Sawa Y

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This study was designed to investigate the distribution of cells expressing podoplanin in the mouse tooth bud. Podoplanin expression was detected in enamel epithelia of the cervical loop at cell-cell contacts strongly, and weakly on the loosely aggregated stellate reticulum in the center and the neighboring stratum intermedium. Odontoblasts exhibited intense podoplanin expression at the junction with predentin while no expression was detected in the enamel organ containing ameloblasts. These results suggest that proliferating inner and outer enamel epithelia express podoplanin but that the expression is suppressed in the differentiated epithelia containing ameloblasts. On the other hand the podoplanin expression occurs in the differentiating odontoblasts and the expression is sustained in differentiated odontoblasts, indicating that odontoblasts have the strong ability to express podoplanin. In cultured apical bud cells podoplanin was detected at cell-cell contacts. In real-time PCR analysis the amount of podoplanin mRNA of the apical buds was 2-fold compared with the amount of kidney used as a positive control. These findings indicate that apical bud cells have the strong ability to express the podoplanin gene. Podoplanin is a mucin-type glycoprotein negatively charged by extensive O-glycosylation and a high content of sialic acid, which expresses the adhesive property. The podoplanin may contribute to form odontoblastic fiber or function as the anchorage to the tooth development and in proliferating epithelial cells of cervical loop and apical bud.

This article was published in Acta Histochem Cytochem and referenced in Journal of Clinical & Experimental Pathology

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