Curcumin targeting miR-155-5p/TP53INP1axis induced oxidative stress to regulate salivary gland tumor cell proliferation, apoptosis

doi:10.19439/j.sjos.2022.05.007

Abstract

Abstract: PURPOSE: To investigate the mechanism of curcumin targeting miR-155-5p/TP53INP1 axis to induce oxidative stress to regulate salivary gland tumor cell proliferation and apoptosis. METHODS: A253 cells were cultured by adding curcumin and transfected with miR-155-5p mimic and/or pcDNA3.1-TP53INP1. Cell proliferation was detected by CCK-8 assay cell apoptosis was detected by flow cytometry, cell migration ability was detected by scratch test. The targeting relationship between miR-155-5p and TP53INP1 was verified by dual luciferase reporter assay. miR-155-5p, TP53INP1 mRNA expression was detected by qRT-PCR. Western blot was performed to detect expression of TP53INP1, Caspase8, Caspase3, Bcl-2, Bax protein; and ELISA was used to determine SOD, Gpx, and MDA content. Statistical analysis was performed using SPSS 22.0 software package. RESULTS: Dual luciferase reporter assay confirmed that TP53INP1 was a downstream target regulatory molecule of miR-155-5p. Compared with DMSO group, cell apoptosis, Caspase8, Caspase3, Bax protein expression and TP53INP1 expression were significantly increased in curcumin group, while Bcl-2 protein expression, miR-155-5p mRNA and number of cell migration were significantly decreased(P<0.05). Compared with curcumin + miR-155-5p mimic group, cell apoptosis, Caspase8, Caspase3, Bax protein expression was significantly increased in curcumin + pcDNA3.1-TP53INP1 group and curcumin + miR-155-5p mimic + pcDNA3.1-TP53INP1 group; Bcl-2 protein expression was significantly increased(P<0.05), SOD, GSH-PX activities and number of cell migration were significantly decreased and MDA content was significantly increased in curcumin+pcDNA3.1-TP53INP1 group (P<0.05). CONCLUSIONS: Curcumin inhibited A253 cell proliferation and promoted A253 cell apoptosis. The mechanism may be related to targeting miR-155-5p/TP53INP1 axis to induce oxidative stress regulation.

Key words: Salivary gland, Malignant neoplasms, Curcumin, miR-155-5p, Oxidative stress

CLC Number:

R739.8

DU Hong-liang, HE Deng-qi, WANG Jia-Li, CHE Yin-fu, YAN Qing-han. Curcumin targeting miR-155-5p/TP53INP1axis induced oxidative stress to regulate salivary gland tumor cell proliferation, apoptosis[J]. Shanghai Journal of Stomatology, 2022, 31(5): 483-490.

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