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Effects of UGT1A1*6, UGT1A1*28, and ABCB1-3435C>T polymorphisms on irinotecan induced toxicity in Chinese cancer patients.

OBJECT
The aim of this study was to investigate whether UGT1A1*6/*28 or ABCB1-3435C>T polymorphisms affect irinotecan-induced severe diarrhea and neutropenia in Chinese cancer patients.


METHODS
A total of 157 cancer patients was enrolled in this study and the genotypes of UGT1A1*6/*28 and ABCB1-3435C>T polymorphisms were analyzed by PCRSanger sequence. The relationship between UGT1A1*6/*28 and ABCB1-3435C>T polymorphisms and irinotecan induced severe diarrhea and neutropenia were analyzed.


RESULTS AND CONCLUSION
UGT1A1*6 and UGT1A1*28 polymorphisms were associated with severe neutropenia (p = 0.025, p = 0.022, respectively) but not diarrhea (p = 0.343, p = 0.185, respectively), and ABCB1- 3435C>T polymorphism was not associated with irinotecan induced severe toxicities (p = 0.457, p = 0.161, respectively).