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- W2019356821 abstract "Platinum‐based chemoradiotherapy (CRT) as bladder conservation therapy has shown promising results for muscle‐invasive bladder cancer. However, CRT might diminish survival as a result of the delay in cystectomy for some patients with non‐responding bladder tumors. Because the p53 tumor suppression pathway, including its MDM2 counterpart, is important in chemotherapy‐ and radiotherapy‐associated effects, functional polymorphisms in the TP53 and MDM2 genes could influence the response to treatment and the prognosis following CRT. We investigated associations between two such polymorphisms, and p53 overexpression, and response or survival in bladder cancer patients treated with CRT. The study group comprised 96 patients who underwent CRT for transitional cell carcinoma of the bladder. Single nucleotide polymorphisms (SNPs) in TP53 (codon 72, arginine > proline) and MDM2 (SNP309, T > G) were genotyped using PCR‐RFLP, and nuclear expression levels of p53 were examined using immunohistochemistry. None of the genotypes or p53 overexpression was significantly associated with response to CRT. However, patients with MDM2 T / G + G / G genotypes had improved cancer‐specific survival rates after CRT ( P = 0.009). In multivariate analysis, the MDM2 T / G + G / G genotypes, and more than two of total variant alleles in TP53 and MDM2 , were independently associated with improved cancer‐specific survival ( P = 0.031 and P = 0.015, respectively). In addition, MDM2 genotypes were significantly associated with cystectomy‐free survival ( P = 0.030). These results suggest that the TP53 and MDM2 genotypes might be useful prognostic factors following CRT in bladder cancer, helping patient selection for bladder conservation therapy. ( Cancer Sci 2009; 100: 2376–2382)" @default.
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- W2019356821 date "2009-11-11" @default.
- W2019356821 modified "2023-10-18" @default.
- W2019356821 title "Association of<i>TP53</i>and<i>MDM2</i>polymorphisms with survival in bladder cancer patients treated with chemoradiotherapy" @default.
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- W2019356821 doi "https://doi.org/10.1111/j.1349-7006.2009.01331.x" @default.
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