Vascular endothelial growth factor +405 C/G polymorphism is highly associated with an increased risk of endometriosis in Turkish women

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The VEGF +405 C/G polymorphism, but not the -460 C/T polymorphism, was significantly associated with an increased risk of endometriosis in Turkish women.

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This case–control study examined whether two VEGF gene polymorphisms in the 5′-untranslated region (−460 C/T and +405 C/G) were associated with endometriosis risk in Turkish women, enrolling 98 histologically confirmed affected cases and 94 controls without laparoscopic evidence of disease. Genotyping was performed using PCR and restriction fragment length polymorphism assays, and differences in genotype and allele frequencies were assessed with chi-square/Fisher’s exact tests and odds ratios. The −460 C/T polymorphism showed no significant difference between groups, whereas the +405 C/G polymorphism differed significantly, with higher frequencies of the +405 GC genotype and +405G allele among women with endometriosis across early and advanced stages. The paper’s limitation is that it is observational genetic association work without functional assessment of how the variant affects VEGF biology. This paper is centrally about endometriosis—VEGF +405 C/G polymorphism association with increased risk of early and advanced stage endometriosis in Turkish women.

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Abstract

ObjectiveEndometriosis 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.Study designA 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.ResultsDemographic 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.ConclusionsThese 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.
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Abstract

Objective Endometriosis 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. Study design A 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.

Results

Demographic 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.

Conclusions

These 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. Similar content being viewed by others

References

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Am J Reprod Immunol 59(4):301–305 Acknowledgments These 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. Conflict of interest statement None. Author information Authors and Affiliations Corresponding author Rights and permissions About this article Cite this article Altinkaya, 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 Received: Accepted: Published: Issue date: DOI: https://doi.org/10.1007/s00404-009-1344-1

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endometriosis

MeSH descriptors

Endometriosis Polymorphism, Single Nucleotide Vascular Endothelial Growth Factor A Adult Case-Control Studies Endometriosis Endometriosis Endometriosis Female Gene Frequency Genotype Humans Infertility, Female Infertility, Female Polymerase Chain Reaction Polymorphism, Restriction Fragment Length Turkey Vascular Endothelial Growth Factor A

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