101. CXCR4polymorphism predicts progression-free survival in metastatic colorectal cancer patients treated with first-line bevacizumab-based chemotherapy
- Author
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Matsusaka, S, Cao, S, Hanna, D L, Sunakawa, Y, Ueno, M, Mizunuma, N, Zhang, W, Yang, D, Ning, Y, Stintzing, S, Sebio, A, Stremitzer, S, Yamauchi, S, Parekh, A, Okazaki, S, Berger, M D, El-Khoueiry, R, Mendez, A, Ichikawa, W, Loupakis, F, and Lenz, H-J
- Abstract
We analyzed associations between CXCR4/CXCL12single-nucleotide polymorphisms and outcomes in metastatic colorectal cancer (mCRC) patients who underwent first-line bevacizumab-based chemotherapy. A total of 874 patients were included in this study: 144 treated with bevacizumab and FOLFOX or XELOX (training cohort), 653 treated with bevacizumab and FOLFIRI or FOLFOXIRI (validation cohort A or B) and 77 treated with cetuximab- and oxaliplatin-based regimens (control cohort). One CXCR4polymorphism (rs2228014) and two CXCL12polymorphisms (rs1801157 and rs3740085) were analyzed by PCR-based direct sequencing. Patients with a C/C genotype had a prolonged progression-free survival (PFS) compared with those with any T allele (P=0.030) in the training cohort. Similarly, patients with the C/C genotype had a superior PFS in the validation cohorts, but not in the control cohort. Our findings suggest that a common genetic variant, CXCR4rs2228014, could predict PFS and may guide therapeutic decisions in mCRC patients receiving first-line bevacizumab-based chemotherapy.
- Published
- 2017
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