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Mol. Hum. Reprod. Advance Access originally published online on August 6, 2004
Molecular Human Reproduction 2004 10(10):729-733; doi:10.1093/molehr/gah096
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Molecular Human Reproduction vol. 10 no. 10 © European Society of Human Reproduction and Embryology 2004; all rights reserved

Ah receptor, CYP1A1, CYP1A2 and CYP1B1 gene polymorphisms are not involved in the risk of recurrent pregnancy loss

Y. Saijo1,3, F. Sata1, H. Yamada2, K. Suzuki1, S. Sasaki1, T. Kondo1, Y.Y. Gong1, E.H. Kato2, S. Shimada2, M. Morikawa2, H. Minakami2 and R. Kishi1

1Department of Public Health and 2Department of Obstetrics and Gynecology, Hokkaido University Graduate School of Medicine, Kita 15, Nishi 7, Kita-ku, Sapporo 060-8638, Japan

3 To whom correspondence should be addressed. Email: y-saijo{at}med.hokudai.ac.jp

The etiology of recurrent pregnancy loss (RPL) remains unclear, but it may be related to a possible genetic predisposition together with involvement of environmental factors. We examined the relation between RPL and polymorphisms in four genes, human aryl hydrocarbon (Ah) receptor, cytochrome P450 (CYP) 1A1, CYP1A2 and CYP1B1, which are involved in the metabolism of a wide range of environmental toxins and carcinogens. All cases and controls were women resident in Sapporo, Japan and the surrounding area. The Ah receptor, CYP1A1, CYP1A2 and CYP1B1 genotypes were assessed in 113 Japanese women with recurrent pregnancy loss (RPL) and 203 ethnically matched women experiencing at least one live birth and no spontaneous abortion (control). No significant differences in Ah receptor, CYP1A1, CYP1A2 and CYP1B1 genotype frequencies were found between the women with RPL and the controls [Ah receptor: Arg/Arg (reference); Arg/Lys and Lys/Lys, odds ratio (OR)=0.67; 95% confidence interval (CI)=0.40–1.11, CYP1A1: m1m1 (reference); m1m2 and m2m2, OR = 0.86; 95% CI = 0.53–1.40, CYP1A2: C/C and C/A (reference); A/A, OR = 1.16; 95% CI = 0.71–1.88, CYP1B1: Leu/Leu (reference); Leu/Val and Val/Val, OR = 1.18; 95% CI = 0.68–2.02]. The present study suggests that the Ah receptor, CYP1A1, CYP1A2 and CYP1B1 gene polymorphisms are not major genetic regulators in RPL.

Key words: Ah receptor/CYP1A1/CYP1A2/CYP1B1/recurrent pregnancy loss


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