{"paper_id":"da9c324a-4b08-4110-a410-e55fc33cfed5","body_text":"Abstract\nObjective\nEndometriosis is a chronic gynecological disease characterized by the growth of hormonally responsive, endometrial tissue outside the uterine cavity. The present study aims to analyze two vascular endothelial growth factor (VEGF) polymorphisms (−460 C/T and +405 C/G) in Turkish women with and without endometriosis.\nStudy design\nA case–control study was undertaken at the Infertility Department of Zekai Tahir Burak Women’s Health Care Education and Research Hospital. The single nucleotide polymorphisms, −460 C/T and +405 C/G, in the 5′-untranslated region of the VEGF gene were tested in 98 affected women and 94 women with no laparoscopic evidence of disease. Endometriosis was also confirmed histologically. Following genomic extraction of genomic DNA, genotyping of the −460 C/T and +405 C/G polymorphisms of the VEGF gene were performed by polymerase chain reaction and restriction fragment length polymorphism assay. Nominal data were evaluated by Pearson Chi-square or Fisher’s Exact test, where applicable. Odds ratios and 95% confidence intervals were also calculated. A P value less than 0.05 was considered statistically significant.\nResults\nDemographic data were similar among groups. The genotype and allele frequencies of the −460 C/T polymorphism did not differ significantly between cases and controls. In contrast, the genotype (P < 0.001) and allele frequencies (P < 0.001) of +405 C/G polymorphism showed a significant difference between cases and controls. Regardless of the early or advanced stage, women with endometriosis showed a higher incidence of the +405 GC genotype and +405G allele when compared with the controls.\nConclusions\nThese data suggest that VEGF +405 GC genotype and +405G allele may be associated with the risk of developing early and advanced stage endometriosis in the Turkish population.\nSimilar content being viewed by others\nReferences\nSperoff L, Fritz MA (2005) Clinical gynecologic endocrinology and infertility, 7th edn. Lippincott Williams & Wilkins, Philadelphia\nDonnez J, Smoes P, Gillerot S, Casanas-Roux F, Nisolle M (1998) Vascular endothelial growth factor (VEGF) in endometriosis. Hum Reprod 13(6):1686–1690\nMahnke JL, Dawood MY, Huang JC (2000) Vascular endothelial growth factor and interleukin-6 in peritoneal fluid of women with endometriosis. 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Am J Reprod Immunol 59(4):301–305\nAcknowledgments\nThese data were presented in part (poster presentation) at the 25th Annual Meeting of the European Society of Human Reproduction and Embryology (ESHRE 2009), which was held in Amsterdam, The Netherlands.\nConflict of interest statement\nNone.\nAuthor information\nAuthors and Affiliations\nCorresponding author\nRights and permissions\nAbout this article\nCite this article\nAltinkaya, S.O., Ugur, M., Ceylaner, G. et al. Vascular endothelial growth factor +405 C/G polymorphism is highly associated with an increased risk of endometriosis in Turkish women. Arch Gynecol Obstet 283, 267–272 (2011). https://doi.org/10.1007/s00404-009-1344-1\nReceived:\nAccepted:\nPublished:\nIssue date:\nDOI: https://doi.org/10.1007/s00404-009-1344-1","source_license":"CC0","license_restricted":false}