Abstract
Oxidative DNA damage, caused by either endogenous or exogenous sources of reactive oxygen species (ROS), has been linked to aging, chronic degenerative diseases, inflammatory diseases and cancers. 8-Hydroxydeoxyguanine (8-OHdG) is a major lesion produced by ROS. Among various types of DNA base modifications, 8-OHdG has been the most widely studied and is considered a key biomarker of oxidative DNA damage. Human 8-oxoguanine DNA glycosylase 1 (hOGG1) is a key component of the base excision repair (BER) pathway and catalyzes the removal of 8-OHdG. Ethnic and inter-individual differences in hOGG1 activity and several kinds of polymorphisms at the hOOG1 gene locus have been observed in the different populations studied so far. Since no information is available on the inter-individual variability of the hOGG1 genotype in the Turkish population, we genotyped 206 healthy, unrelated Turkish individuals. The allelic frequencies of the hOGG1 gene in the Turkish population were found to be 0.50, 0.41 and 0.09 (Ser/Ser, Ser/Cys and Cys/Cys, respectively). Our results are similar to those for Caucasians studied previously but are different from Asian populations. It seems that there is a growing need for extensive genotype studies with respect to the hOGG1 gene due to its importance to various types of cancer and to smoking habits.
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Experiments carried out in the present study comply with the current laws of the country in which the experiments were performed. The authors also wish to thank all subjects who volunteered to participate.
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Karahalil1, B., Kocabaş, N.A. hOGG1 SER326CYS genetic polymorphism in a Turkish population. Arch Toxicol 79, 377–380 (2005). https://doi.org/10.1007/s00204-005-0665-5
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DOI: https://doi.org/10.1007/s00204-005-0665-5