Advanced Paternal Age was noted for the fathers of patients with Crouzon or Pfeiffer Syndrome 34.50 +/- 7.65 years

OUR RESULTS SUGGEST THAT OLDER FATHERS HAVE ACCUMULATED OR ARE MORE SUSCEPTIBLE TO A VARIETY OF GERM LINE MUTATIONS


Published by the University of Chicago Press

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Title Paternal Origin of FGFR2 Mutations in Sporadic Cases of Crouzon Syndrome and Pfeiffer Syndrome
Author(s) Rivka L. Glaser, Wen Jiang, Simeon A. Boyadjiev, Alissa K. Tran, Andrea A. Zachary, Lionel Van Maldergem, David Johnson, Sinead Walsh, Michael Oldridge, Steven A. Wall, Andrew O. M. Wilkie, and Ethylin Wang Jabs
Identifiers The American Journal of Human Genetics, volume 66 (2000), pages 768–777
DOI: 10.1086/302831
PubMed ID: 10712195

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Abstract Crouzon syndrome and Pfeiffer syndrome are both autosomal dominant craniosynostotic disorders that can be caused by mutations in the fibroblast growth factor receptor 2 (FGFR2) gene. To determine the parental origin of these FGFR2 mutations, the amplification refractory mutation system (ARMS) was used. ARMS PCR primers were developed to recognize polymorphisms that could distinguish maternal and paternal alleles. A total of 4,374 bases between introns IIIa and 11 of the FGFR2 gene were sequenced and were assayed by heteroduplex analysis, to identify polymorphisms. Two polymorphisms (1333TA/TATA and 2710 C/T) were found and were used with two previously described polymorphisms, to screen a total of 41 families. Twenty-two of these families were shown to be informative (11 for Crouzon syndrome and 11 for Pfeiffer syndrome). Eleven different mutations in the 22 families were detected by either restriction digest or allele-specific oligonucleotide hybridization of ARMS PCR products. We molecularly proved the origin of these different mutations to be paternal for all informative cases analyzed (P=2.4×10-7; 95% confidence limits 87%100%). Advanced paternal age was noted for the fathers of patients with Crouzon syndrome or Pfeiffer syndrome, compared with the fathers of control individuals (34.50±7.65 years vs. 30.45±1.28 years, P<.01). Our data on advanced paternal age corroborates and extends previous clinical evidence based on statistical analyses as well as additional reports of advanced paternal age associated with paternal origin of three sporadic mutations causing Apert syndrome (FGFR2) and achondroplasia (FGFR3). Our results suggest that older men either have accumulated or are more susceptible to a variety of germline mutations.