Efficacy of ER-alpha polymorphisms and the intrafollicular IGF system for predicting pregnancy in IVF-ET patients.

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Authors: Young Sik Choi ; Seok Hyun Kim ; Seung-Yup Ku ; Byung Chul Jee ; Chang Suk Suh ; Young Min Choi ; Jung Gu Kim ; Shin Yong Moon

MeSH: Adult ; Biomarkers/analysis ; Case-Control Studies ; Embryo Transfer ; Enzyme-Linked Immunosorbent Assay ; Estrogen Receptor alpha/genetics ; Estrogen Receptor alpha/metabolism* ; Female ; Fertilization in Vitro ; Genotype ; Humans ; Insulin-Like Growth Factor Binding Protein 3/genetics ; Insulin-Like Growth Factor Binding Protein 3/metabolism ; Insulin-Like Growth Factor Binding Protein 4/analysis ; Insulin-Like Growth Factor Binding Protein 4/genetics ; Insulin-Like Growth Factor Binding Protein 4/metabolism ; Insulin-Like Growth Factor Binding Proteins/genetics ; Insulin-Like Growth Factor Binding Proteins/metabolism* ; Insulin-Like Growth Factor I/genetics ; Insulin-Like Growth Factor I/metabolism ; Insulin-Like Growth Factor II/genetics ; Insulin-Like Growth Factor II/metabolism ; Logistic Models ; Multivariate Analysis ; Polymorphism, Genetic* ; Predictive Value of Tests ; Pregnancy ; Pregnancy Outcome* ; Probability ; Radioimmunoassay ; Risk Assessment ; Sensitivity and Specificity ; Somatomedins/analysis ; Somatomedins/metabolism*

Keywords: Estrogen receptor-α ; Polymorphism ; Insulin-like growth factor ; Insulin-like growth factor binding protein ; In vitro fertilization and embryo transfer

Abstract: AIMS: To evaluate the efficacies of the estrogen receptor-alpha (ER-alpha) gene polymorphisms and of the intrafollicular insulin-like growth factor (IGF) system for predicting pregnancy in in vitro fertilization and embryo transfer (IVF-ET) patients.

METHODS: A total of 96 patients undergoing IVF-ET were included in this study. Genotyping for the ER-alpha gene PvuII and XbaI polymorphisms was performed using polymerase-chain reaction and single base extension method. Follicular fluid (FF) IGF-I, IGF-II, and IGFBP-3 concentrations were measured by RIA, and IGFBP-4 by ELISA. We compared, between pregnant (n = 28) and non-pregnant groups (n = 68), the allele frequency, genotype distribution and haplotype distribution of PvuII and XbaI polymorphisms, and then FF IGF-I, IGF-II, IGFBP-3, IGFBP-4 concentrations and their ratios.

RESULTS: No significant differences were found between the two groups in terms of allele, genotype or haplotype distributions of the ER-alpha gene PvuII and XbaI polymorphisms between the two groups. The mean FF IGF-I/IGFBP-3 ratio was significantly higher in the pregnant group (5.9 +/- 1.5 vs. 4.8 +/- 1.5 x 10(-2)).

CONCLUSIONS: The intrafollicular IGF-I/IGFBP-3 ratio of the FF of the dominant follicle during oocyte retrieval appears to be related to the establishment of pregnancy in IVF-ET patients, whereas the ER-alpha gene PvuII and XbaI polymorphisms do not.

Appears in Collections:: 1. College of Medicine (의과대학) > Dept. of Obstetrics and Gynecology (산부인과학교실) > 1. Journal Papers

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