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Mitochondrial DNA 4977-bp deletion in endometriosis
Elnaz Salahi,Zivar Salehi,Ziba Zahiri,Saeedeh Sadri,Niloofar Khoshdel Rad 한국유전학회 2013 Genes & Genomics Vol.35 No.5
Endometriosis is a multifactorial gynecological condition characterized by the presence of ectopic endometrial and stromal tissue outside the uterus. Free radicals and Oxidative stress have been proposed to be involved in the pathogenesis of the endometriosis. It has been shown that mitochondrial DNA (mtDNA) is particularly susceptible to oxidative damage and mutations due to the high rate of reactive oxygen species production and limited DNA repair capacity in mitochondria. While a number of deletions can occur, the most commonly studied in human is a 4977-bp deletion that removes all or parts of the genes for NADH dehydrogenase subunits 3, 4, 4L and 5, cytochrome C oxidase subunit III and ATP synthase subunits 6 and 8.’’ We evaluated whether mtDNA common deletion is related with the susceptibility to endometriosis in northern Iran. In this study 80 endometriosis cases and 100 controls were enrolled. Total DNA was extracted from endometrial tissue samples. The mitochondrial common deletion was determined by Gap- polymerase chain reaction (Gap-PCR). It was found that the mitochondrial common deletion was more likely to be present in patients with endometriosis. Assessing indicate that 60 % of patients and 8 % of controls show mtDNA 4977-bp deletion (Odds Ratio [OR] = 17.25, P\0.0001, confidence interval [CI] = 5.18–57.36). The mtDNA 4977 deletion may play a role in endometriosis. Further studies with larger numbers of patients are required for further evaluation and confirmation of our finding.
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