Oxidative stress has been implicated in numerous pathophysiological conditi
ons and also aging. The tools for studying oxidative stress are now expandi
ng as a result of the human genome effort and, in particular, expanding kno
wledge on human genetic variation. A few genetic variants, mostly in the fo
rm of single nucleotide polymorphisms of relevance to oxidative stress are
already studied by a molecular epidemiologic approach. A review of the curr
ent knowledge on variant human genes that are directly implicated in human
protection against oxidative stress is presented. (C) 2001 Academic Press.