Mechanism of Chir99021 regulating Wnt/β-catenin signaling pathway inhibiting osteogenic differentiation of rat dental pulp stem cells

doi:10.16098/j.issn.0529-1356.2024.01.010

Abstract

Abstract:

Objective To explore the effect and mechanism of Chir99021 on osteogenic differentiation of rat dental pulp stem cells. Methods Primary rat dental pulp stem cells were isolated from rat dental pulp and verified by fluorescence immunoassay. Different concentrations of Chir99021 were set, and the cell proliferation was detected by CCK-8 to select the optimal concentration. Osteogenic differentiation was detected by alizarin red staining. The expression of osteogenic differentiation related genes and proteins recombinant wingless type MMTV integration site famity member 1(Wnt1), Wnt3a and Wnt3a β-expression of catenin, axis inhibition protein 2(Axin 2), dentin sialophosphoprotein(OCN) and dentin matrix acidic phosphoprotein 1(DMP1) was detected by Real-time PCR and Western blotting. Results The positive expression of dentin sialophosphoprotein(DSPP) and vimentin indicated that rat dental pulp stem cells were successfully isolated. After osteogenic induction of rat dental pulp stem cells, calcium deposits significantly increased with the addition of glycogen synthase kinase-3β(GSK-3β) inhibitor Chir99021, calcium deposits were significanted reduced. After osteogenic differentiation of rat dental pulp stem cells, the expression of Wnt1, Wnt3a, β-catenin, Axin2, OCN and DMP1 increased, while the expression of Wnt1, Axin2, OCN and DMP1 decreased with the addition of Chir99021. Conclusion Chir99021 can inhibit the osteogenic differentiation of rat dental pulp stem cells after 7 days of induction.

Key words: Dental pulp stem cell, Osteogenic differentiation, Chir99021, Real-time PCR, Rat

CLC Number:

XIE Hui-lan FANG Fang LIN Yi. Mechanism of Chir99021 regulating Wnt/β-catenin signaling pathway inhibiting osteogenic differentiation of rat dental pulp stem cells[J]. Acta Anatomica Sinica, 2024, 55(1): 67-72.

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