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Year : 2016  |  Volume : 12  |  Issue : 2  |  Page : 782-786

DPYD*2A/*5A/*9A and UGT1A1*6/*28 polymorphisms in Chinese colorectal cancer patients

Molecular Testing Laboratory, Hanzhong 3201 Hospital, School of Medicine, Xi'An Jiaotong University' Shaanxi, China

Correspondence Address:
Tao Liu
783, Tian han Road, Han tai District, Han zhong City, Shaanxi
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0973-1482.148685

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Aim of Study: Fluorouracil drugs and irinotecan are commonly used in the treatment of colorectal cancer (CRC), but some patients have severe toxic side effects in the conventional dose. DPYD*2A/*5A/*9A and UGT1A1 * 6/*28 polymorphisms are related to the toxicity of fluorouracil drugs and irinotecan, respectively. Herein, we investigated the frequencies of DPYD*2A/*5A/*9A and UGT1A1 * 6/*28 genotypes in Chinese CRC patients. Materials and Methods: For this study, 117 CRC patients' tumor tissues were examined through sequencing technology of the first generation to explore the distribution of DPYD*2A/*5A/*9A and UGT1A1 * 6/*28 genotypes. Results: DPYD*2A G/G genotype accounted for 100%. DPYD*5A A/A, A/G, and G/G genotypes accounted for 48.2, 37.5, and 14.3%, respectively. DPYD*9A T/T and T/C genotypes accounted for 85.7 and 14.3%, respectively. UGT1A1 * 6 G/G, G/A, and A/A genotypes accounted for 74.6, 21.8, and 3.6%, respectively. UGT1A1 * 28 TA6/TA6, TA6/TA7, and TA7/TA7 genotypes accounted for 71.8, 27.3, and 0.9%, respectively. The genotypes of DPYD*2A/*5A/*9A and UGT1A1 * 6/*28 were not associated with patient's sex, age, and primary tumor sites. Our findings showed that: (i) almost 57.1% of Chinese CRC patients had at least one variant of DPYD*5A and DPYD*9A; (ii) nearly 37.3% of Chinese CRC patients had at least one variant of UGT1A1 * 6 and UGT1A1 * 28. Conclusion: It suggests that it is necessary for Chinese CRC patients to detect the genotypes of DPYD*5A/*9A and UGT1A1 * 6/*28 before treating with fluorouracil drugs and irinotecan.

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