While HLA-B*1502 is unlikely to be associated with carbamazepine-related or aromatic anti-epileptic agent-related SJS/TEN, HLA-B*5801 was significantly associated with allopurinol-related SJS/TEN in Japanese.
This study identified several UGT1A1 haplotypes significantly associated with the reduced AUC ratio (*28 and *6) and with the increased total bilirubin level (*28, *60, and *IB) and suggested that the novel haplotype *IB might be functionally important. These findings will be useful for further pharmacogenetic studies on adverse reactions to irinotecan.
The haplotypes significantly associated with reduced area under concentration curve ratios and neutropenia contained UGT1A1*6 or *28, and both of them should be genotyped before irinotecan is given to Japanese and probably other Asian patients.
This study identified CYP2C variants, including CYP2C9*3, known to reduce drug clearance, as important genetic factors associated with phenytoin-related severe cutaneous adverse reactions.
Haplotype *3 harboring a nonsynonymous SNP, 208G>A (Ala70Thr), decreased clearance of gemcitabine, and increased incidences of neutropenia when patients were coadministered platinum-containing drugs or fluorouracil.
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