Correlations between microsatellite instability, ERCC1/XRCC1 polymorphism and clinical characteristics, and FOLFOX adjuvant chemotherapy effect of colorectal cancer patients

In this study, MSI status was determined in tumors and paired normal tissues from 101 colorectal cancer (CRC) patients. We also examined SNP of ERCC1 (c. C354T) and XRCC1 (c.G1196A) in 83 and 85 patients' blood. MSI was found to be significantly correlated with well/moderate histopathological differentiation (p=0.038) and CRC family history (p=0.003). CEA and CA19-9 levels was positive correlated significantly by Spearman correlation analysis (Pearson's r=0.823, p<0.0001). No significant correlation was found between MSI status and ERCC1/XRCC1 polymorphisms. We found greater drop of CEA level in mFOLFOX6 sensitive group than low sensitive group after mFOLFOX6 adjuvant chemotherapy according to MSI status, ERCC1 and XRCC1 SNP. MSI was significantly correlated with well/moderate histopathological differentiation (p=0.038) and CRC family history (p=0.003). The MSI status, ERCC1 and XRCC1 polymorphisms may influence the clinical outcome of colorectal cancer patients treated with mFOLFOX6 adjuvant chemotherapy.
Source: Cancer Genetics - Category: Cancer & Oncology Source Type: research