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Molecular Human Reproduction, Vol. 6, No. 1, 1-4, January 2000
© 2000 European Society of Human Reproduction and Embryology

Genetic diagnosis

No evidence for uniparental disomy of the sex chromosomes in idiopathic male infertility

D. Meschede1, B. Dworniczak1, H.M. Behre2, E. Nieschlag2 and J. Horst1,3

1 Institute of Human Genetics of the University, Vesaliusweg 12–14, D-48149 Münster, Germany, and 2 Institute of Reproductive Medicine of the University, Domagkstr. 11, D-48129 Münster, Germany

Abstract

Uniparental disomy (UPD) is a rare genetic aberration characterized by the uni- rather than biparental inheritance of a pair of homologous chromosomes. Among the various adverse clinical effects that UPD can have in humans, abnormalities of the male reproductive system have been described in UPD of the chromosomes 7, 11, 14 and 15. Given the considerable rate of sex chromosomal aneuploidy in human gametes and zygotes, we postulated that paternal uniparental disomy of the sex chromosomes might be a cause of otherwise unexplained male infertility. With a set of highly polymorphic DNA markers the parental origin of the X chromosome in 41 men with severe idiopathic infertility was determined. In all patients the X chromosome was derived from the mother, indicating regular biparental inheritance of the sex chromosomes. We thus obtained no evidence that paternal uniparental disomy of the X and Y chromosomes is a mechanism underlying idiopathic male infertility.

male infertility/sex chromosomes/uniparental disomy

Notes

3 To whom correspondence should be addressed


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