West China Journal of Stomatology ›› 2022, Vol. 40 ›› Issue (1): 93-99.doi: 10.7518/hxkq.2022.01.014

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Porphyromonas gingivalis upregulates calbindin 1 and thus promotes the proliferation of gingival epithelial cells

Zhang Yuwei(), He Yuxuan, Ding Yi, Liu Chengcheng.()   

  1. State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Dept. of Periodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
  • Received:2021-02-08 Revised:2021-10-04 Online:2022-02-01 Published:2022-02-07
  • Contact: Liu Chengcheng. E-mail:luckyzhyw@163.com;liuchengcheng519@163.com
  • Supported by:
    The National Natural Science Foundation of China(81600871);Correspondence: Liu Chengcheng, E-mail: liuchengcheng519@163.com

Abstract: Objective

This study aims to investigate the effect of calbindin 1 on the proliferation and apoptosis of gingival epithelial cells affected by Porphyromonas gingivalis (P. gingivalis)invitro.

Methods

A model of P. gingivalis infecting CA9-22 was established in vitro. At 24 h after infection, the expression of calbindin 1 (CALB1) was detected by real-time fluorescent quantitative polymerase chain reaction, Western blot, and immunofluorescence analyses. The expression of CALB1 was further inhibited by RNA interference. Cell proliferation was detected by BrdU analysis, and cell apoptosis was detected by caspase 3 activity. The expression of MDM2 and p53 was detected by Western blot analysis.

Results

P. gingivalis infection upregulated the expression of CALB1 in CA9-22 cells with multiplicity-dependent manner. CALB1 promoted the proliferation of CA9-22 cells, increased the expression of MDM2, and inhibited the expression of p53. Inhibiting CALB1 expression did not affect the inhibitory effect of P. gingivalis infection on CA9-22 apoptosis.

Conclusion

P. gingivalis infection can promote the proliferation of CA9-22 cells by increasing CALB1 expression. The related mechanism may be associated with MDM2-p53.

Key words: Porphyromonas gingivalis, gingival epithelial cell, cell proliferation, calbindin 1

CLC Number: