Selected SNPs belong to the following genes : ADH1B , ALDH 2 , APEX , CDKN2A , COMT , CYP1A1 , CYP1A2 , CYP1B1 , CYP2A6 , CYP2C19 , CYP2C9 , CYP2E1 , CYP3A4 , DRD 2 , DRD 4 , EPHX 1 , ERCC 1 , ERCC 2 , ERCC 4 , ERCC 5 , GRPR , GSTA 4 , GSTM 3 , GSTP 1 , GSTT 2 , LIG 3 , MDM 2 , MGMT , MPO , NAT 1 , NAT 2 , NQO 1 , OGG 1 , PCNA , POLB , SLC6A3 , SOD 2 , TP 53 , XRCC 1 , XRCC 2 , XRCC 3 , and XRCC 9 . ^^^ |
Eleven polymorphisms in nine genes were studied : seven genes related to oxidative stress ( SOD 2 , GSTT 1 , GSTM 1 , EPHX 1 , NQO 1 , p 22 PHOX , and NOS 3 ) , and two genes related to apoptosis ( TP 53 and CD 95 ) . ^^^ |