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Hum. Reprod. Advance Access published online on October 20, 2005
Human Reproduction, doi:10.1093/humrep/dei357
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© The Author 2005. Published by Oxford University Press on behalf of the European Society of Human Reproduction and Embryology. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org
Received August 5, 2005
Revised September 14, 2005
Accepted September 20, 2005

Article

Analysis of the chromosomal region 19q13.4 in two Chinese families with recurrent hydatidiform mole

J. Zhao 1, J. Moss 2, N.J. Sebire 2, Q.C. Cui 3, M.J. Seckl 4, Y. Xiang 1, and R.A. Fisher 4*

1 Department of Obstetrics and Gynecology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Science, Beijing 100730, China
2 Department of Histopathology, Charing Cross Hospital, London W6 8RF, UK
3 Department of Pathology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Science, Beijing 100730, China
4 Department of Oncology, Division of Surgery, Oncology, Reproductive Biology and Anaesthetics, Faculty of Medicine, Imperial College London, Charing Cross Campus, London W6 8RF, UK

* To whom correspondence should be addressed.
R.A. Fisher, E-mail: r.fisher{at}imperial.ac.uk


  Abstract

BACKGROUND: Familial recurrent hydatidiform mole is an extremely rare autosomal recessive condition in which affected individuals have a predisposition to molar pregnancies that are diploid but biparental, rather than androgenetic, in origin. A gene for this condition has been previously mapped to a 1.1 Mb region of chromosome 19q13.4. However, investigation of further families is needed to refine the location of the specific gene(s) involved. METHODS: We have recently identified two novel Chinese families in which four affected women had recurrent pregnancy loss including 14 complete hydatidiform moles (CHM). Fluorescent microsatellite genotyping was used to determine the origin of CHM in both families. Using a panel of polymorphic microsatellite markers, genotyping and haplotype analysis of the 19q13.4 chromosomal region was performed in both families. RESULTS: Genotyping of CHM from affected individuals confirmed their biparental origin and diagnosis of familial recurrent hydatidiform mole in both families. However, no significant homozygosity for the 19q13.4 candidate region was found in affected members of either family. CONCLUSION: Genotyping and haplotype analysis has shown that a mutation in 19q13.4 is unlikely to be responsible for recurrent CHM in the two Chinese families investigated and provides further evidence to support the hypothesis that, although extremely rare, this condition shows genetic heterogeneity.

Keywords: biparental complete hydatidiform mole/familial hydatidiform mole/genomic imprinting/recurrent hydatidiform mole.
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