Lee KH, Chang HJ, Han SW, Oh DY, Im SA, Bang YJ, Kim SY, Lee KW, Kim JH, Hong YS, Kim TW, Park YS, Kang WK, Shin SJ, Ahn JB, Kang GH, Jeong SY, Park KJ, Park JG, Kim TY. Pharmacogenetic analysis of adjuvant FOLFOX for Korean patients with colon cancer.
Cancer Chemother Pharmacol 2013;
71:843-851. [PMID:
23314736 DOI:
10.1007/s00280-013-2075-3]
[Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2012] [Accepted: 01/01/2013] [Indexed: 12/22/2022]
Abstract
PURPOSE
Ethnic diversity of genetic polymorphism can result in individual differences in the efficacy and toxicity of cancer chemotherapy.
METHODS
We analyzed 20 germline polymorphisms in 10 genes (TS, MTHFR, ERCC1, XPD, XRCC1, ABCC2, AGXT, GSTP1, GSTT1 and GSTM1) from prospectively enrolled 292 Korean patients treated with adjuvant oxaliplatin plus leucovorin plus 5-fluorouracil (FOLFOX) for colon cancer.
RESULTS
In contrast to previous studies in Caucasians, neutropenia (grade 3-4, 60.5 %) was frequently observed, whereas only 16.4 % experienced grade 2 or more sensory neuropathy. Neutropenia was more frequent in MTHFR 677TT [adjusted odds ratio (OR) 2.32, 95 % confidence interval (CI) 1.19-4.55] and ERCC1 19007TT (adjusted OR 4.58, 95 % CI 1.20-17.40) genotypes. Patients harboring XRCC1 23885GG experienced less grade 2-4 neuropathy [adjusted OR 0.52, 95 % CI 0.27-0.99]. MTHFR 677TT (p = 0.002) and XRCC1 23885GG (p = 0.146) genotypes were also more prevalent in Koreans compared to Caucasians. TS 'low' genotype (adjusted HR 1.83, 95 % CI 1.003-3.34) was significantly related to shorter disease-free survival. Overall survival was not significantly different according to the polymorphisms.
CONCLUSIONS
Polymorphisms in MTHFR, XRCC1 and TS are related to toxicities and disease-free survival in patients with colon cancer. The ethnic differences in frequencies of genotypes may explain the ethnic difference in toxicity profile following adjuvant FOLFOX chemotherapy.
Collapse