Osteogenic-related gene expression profiles of human dental follicle cells induced by dexamethasone

Acta Pharmacologica Sinica
Zuo-Lin JinYin Ding

Abstract

Human dental follicle cells (hDFC) have the ability to differentiate into mineralized tissue-forming cells during root and periodontal development or osteogenic induction in vitro. The present study aimed to validate the osteogenic induction of hDFC by dexamethasone (DEX) and to explore the changes of related genes responsible for the osteogenic differentiation process. Passage-cultured hDFC were induced by DEX and analyzed for mineralization activity by morphological observation, alkaline phosphatase (ALP) activity, and alizarin red S staining. GEArray Q series human osteogenesis gene array was used to describe large-scale gene expression in treated hDFC compared to the control group. Quantitative real-time RT-PCR was performed to confirm the microarray data by analyzing the expression of 7 critical transcripts. Osteogenic differentiation of hDFC was confirmed by morphological change, elevated ALP activity and calcified nodules. In 96 genes investigated through the microarray analysis, 20 genes were upregulated and 8 genes were downregulated more than 2-fold. The results of the real-time RT-PCR correlated with the microarray analysis. The expression of the transforming growth factor-beta superfamily showed varying degrees of i...Continue Reading

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