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- W4281738398 abstract "Background/Aim: Oral squamous cell carcinoma (OSCC) is one of the most common tumors of the head and neck region. The tumor suppressor gene p53 (TP53) is the most frequently mutated gene in OSCC and TP53 mutations are associated with decreased survival and resistance to chemotherapy in patients with OSCC. Therefore, therapeutic strategies targeting TP53 reactivation are required to effectively treat OSCC. In this study, we investigated the effect of various p53-reactivating small molecules (RITA, PRIMA-1, and CP-31398) on the proliferation of human OSCC cell lines (Ca9-22, HSC-2, HSC-3, and HSC-4) derived from human oral tissues bearing a mutant TP53 gene. Materials and Methods: Apoptosis induction by RITA was assessed by measuring Annexin V and propidium iodide (PI)-positive cells using flow cytometry. p53 and murine double minute 2 (MDM2) phosphorylation and Bax expression were detected in the lysates of RITA-treated Ca9-22 cells using western blotting. Results: RITA markedly inhibited the growth of Ca9-22, HSC-2, HSC-3, and HSC-4 cells. In Ca9-22 cells, RITA induced apoptosis and inhibited cell proliferation while increasing p53 phosphorylation and Bax expression; however, RITA did not induce MDM2 phosphorylation. Conclusion: The inhibitory effect of RITA on human OSCC cell proliferation is mediated by apoptosis induction through p53 and Bax." @default.
- W4281738398 created "2022-06-13" @default.
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- W4281738398 date "2022-05-31" @default.
- W4281738398 modified "2023-09-26" @default.
- W4281738398 title "Reactivation of p53 by RITA Induces Apoptosis in Human Oral Squamous Cell Carcinoma Cells" @default.
- W4281738398 doi "https://doi.org/10.21873/anticanres.15775" @default.
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