PubMed ID (PMID): 20936191Pages 45-49, Language: EnglishZou, Xiao Ying / Zhuang, Heng / Yue, Lin / Gao, Xue JunObjective: To evaluate whether the Notch signalling pathway is involved in the senescence of human dental pulp cells.
Methods: Human dental pulp cells were isolated and cultured. The Notch signalling pathway was blocked by adding DAPT (N-[N-(3,5-difluorophenacetyl-L-alanyl)]-S-phenylglycine t-butyl ester, γ-secretase inhibitor, 5 µmol/L) into the culture medium. Cell proliferation was evaluated by MTT assay. Cell senescence was evaluated through expression of senescenceassociated ß-galactosidase (SA-ß-Gal) using ß-galactosidase staining.
Results: The proliferation of the human dental pulp cells decreased dramatically after treatment with DAPT, compared with the control. SA-ß-Gal positive staining cells were seen in the DAPT group, but not in the control group.
Conclusion: The Notch signalling pathway is involved in the senescence of human dental pulp cells.
Keywords: dental pulp cells, senescence, Notch signalling pathway