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- Title
CAG repeat length variation in the polymerase gamma (POLG) gene: effect on semen quality.
- Authors
Westerveld, G H; Kaaij-Visser, L; Tanck, M; van der Veen, F; Repping, S
- Abstract
Several case-control studies have investigated the effect of CAG repeat length variation in the POLG gene on male fertility and semen quality. Some described an association between the homozygous not10 CAG-repeat genotype and male subfertility and/or reduced semen quality, whereas others did not. The aim of our study was to investigate whether the not10/not10 variant is associated with spermatogenic failure. By direct sequencing methods, we determined the CAG repeat length of POLG in a cohort of 700 consecutive included men with variable degrees of spermatogenesis to investigate its effect on semen quality. The frequency of the not10/not10 variant in our cohort was 4.7%. There were no differences in semen quality between groups with various POLG genotypes. There was a significant difference in frequency of the three CAG-repeat genotypes between ethnic subgroups. In conclusion, the not10/not10 POLG variant is not associated with clinically significant decreases in semen quality, but its frequency is dependent on ethnic background.
- Publication
Molecular human reproduction, 2008, Vol 14, Issue 4, p245
- ISSN
1460-2407
- Publication type
Journal Article
- DOI
10.1093/molehr/gan012