In conclusion, the Arg723Gln (2168G > A) polymorphism of ABCC1 appears to be a potential susceptibility marker for lung cancer in the Chinese population, especially in older people.
The genotyping analyses for 6 common regulatory variants (reference single-nucleotide polymorphism 4728709 [rs4728709] and rs2188524 in the 5' flanking region of ABCB1 and rs3842 in its 3' untranslated region; rs3743527, rs212090, and rs212091 in the 3' untranslated region of ABCC1) was conducted in a case-control study of 500 patients with incident lung cancer and 517 cancer-free controls in a Chinese population.