Communicated by Stylianos E. Antonarakis
Mutation in Brief
Genetic and Epigenetic Analysis of Recurrent Hydatidiform Mole†
Article first published online: 23 MAR 2009
© 2009 Wiley-Liss, Inc.
Volume 30, Issue 5, pages E629–E639, May 2009
How to Cite
Hayward, B. E., De Vos, M., Talati, N., Abdollahi, M. R., Taylor, G. R., Meyer, E., Williams, D., Maher, E. R., Setna, F., Nazir, K., Hussaini, S., Jafri, H., Rashid, Y., Sheridan, E. and Bonthron, D. T. (2009), Genetic and Epigenetic Analysis of Recurrent Hydatidiform Mole. Hum. Mutat., 30: E629–E639. doi: 10.1002/humu.20993
- Issue published online: 27 APR 2009
- Article first published online: 23 MAR 2009
- Manuscript Accepted: 26 JAN 2009
- Manuscript Received: 21 NOV 2008
- Cited By
- hydatidiform mole;
- autosomal recessive;
Familial biparental hydatidiform mole (FBHM) is a maternal-effect autosomal recessive disorder in which recurrent pregnancy failure with molar degeneration occurs. The phenotype mimics molar pregnancy due to androgenesis, despite the normal genetic makeup of the conceptus. FBHM appears to result from a failure to establish correct maternal epigenetic identity at imprinted loci during oogenesis. Several women affected with FBHM have previously been shown to have biallelic mutations in the NLRP7 gene (NALP7). Here, we present the results of epigenetic and mutational analysis on FBHM patients from 11 families, 10 of them novel. We demonstrate a methylation defect at imprinted loci in tissue from four new FBHM cases. Biallelic NLRP7 mutations, including eight previously undescribed mutations, were found in all but one family. These results indicate for the first time that maternal imprints at some loci may be correctly specified in FBHM conceptions, since differential methylation of SGCE/PEG10 was preserved in all four cases. © 2009 Wiley-Liss, Inc.