ERCC1 C118T基因多態(tài)性與晚期膀胱癌鉑類(lèi)方案化療敏感性的研究
[Abstract]:Background and objective: bladder cancer is one of the most common tumors in urology in China. The treatment of advanced bladder cancer is still unsatisfactory. Cisplatin combined with gemcitabine (GC) regimen can significantly prolong the overall survival of patients with less adverse reactions, so it is recommended as a first-line chemotherapy regimen for advanced bladder cancer. Still, less than 50% of patients are sensitive to the regimen. Therefore, it is of great clinical significance to search for molecular markers that can predict the chemosensitivity of GC regimen in patients with advanced bladder cancer. Platinum, such as cisplatin, is a heavy metal complex that acts directly on DNA, and DNA to form adducts, limiting the unwinding of DNA and effectively inhibiting the replication and transcription of DNA. Excision repair cross-complementary gene 1 (ERCCl,) is a key gene in nucleotide excision repair pathway (NER). ECCCL gene overexpression is a poor prognostic factor in cisplatin-based adjuvant chemotherapy for local advanced bladder cancer. Up to now, there has been no report on the relationship between ERCClC118T gene polymorphism and chemotherapy sensitivity of platinum regimen in advanced bladder cancer. Therefore, we conducted a non-random, retrospective study to investigate its role in bladder cancer chemotherapy. Methods: 41 patients with advanced bladder cancer admitted to Jiangsu Cancer Hospital from January 2010 to September 2012 were treated with cisplatin combined with gemcitabine regimen for 2-6 cycles. ERCCl codon118 genotypes were detected by PCR-RFLP, and RECIST score was used to evaluate the effect of chemotherapy. The CR PR was effective and SD PD was ineffective. To compare the relationship between different genotypes and clinicopathological features and survival time after chemotherapy with platinum regimen. Results the percentage of wild type C / C was 56.1% (23 / 41), heterozygosity C / T was 34.1% (14 / 41) and mutant T / T was 9.8% (4 / 41). The PFS with ERCCl codon 118C / C genotype was 6 months, while the PFS with C / T or T / T genotype was 4 months (蠂 ~ 2 / 5.154P ~ (0.032). In addition, OS with ERCCl codon 118C / C genotype was significantly longer than that with C / T or T / T genotype (11 months vs 8 months, 4.199p0.040). In multivariate regression analysis of the prognosis of PFS and OS, it was found that the wild type of ERCCl codon 118C / C was 1.83 times as high as that of the heterozygote C / T (P0.016) and 1.8395% (1.12-2.99), and 1.94 times as high as the mutant of ERCCl codon 118T / T (P0.010% 1.9495CI1.17-3.27). Conclusion: compared with other genotypes, carrying ERCCl codon 118C/C genotypes has better objective chemotherapeutic response rate, and prolonging PFS and total OS.ERCCl codon 118C / C may be the key molecular markers for predicting the chemosensitivity of advanced bladder cancer.
【學(xué)位授予單位】:南京醫(yī)科大學(xué)
【學(xué)位級(jí)別】:博士
【學(xué)位授予年份】:2016
【分類(lèi)號(hào)】:R737.14
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