Activating mutations in FGFR3 and HRAS reveal a shared genetic origin for congenital disorders and testicular tumors.
Genes mutated in congenital malformation syndromes are frequently implicated in oncogenesis, but the causative germline and somatic mutations occur in separate cells at different times of an organism's life. Here we unify these processes to a single cellular event for mutations arising in male germ cells that show a paternal age effect. Screening of 30 spermatocytic seminomas for oncogenic mutations in 17 genes identified 2 mutations in FGFR3 (both 1948A>G, encoding K650E, which causes thanatophoric dysplasia in the germline) and 5 mutations in HRAS. Massively parallel sequencing of sperm DNA showed that levels of the FGFR3 mutation increase with paternal age and that the mutation spectrum at the Lys650 codon is similar to that observed in bladder cancer. Most spermatocytic seminomas show increased immunoreactivity for FGFR3 and/or HRAS. We propose that paternal age-effect mutations activate a common 'selfish' pathway supporting proliferation in the testis, leading to diverse phenotypes in the next generation including fetal lethality, congenital syndromes and cancer predisposition.
Anne
A
Goriely
Ruth M S
RM
Hansen
Indira B
IB
Taylor
Inge A
IA
Olesen
Grete Krag
GK
Jacobsen
Simon J
SJ
McGowan
Susanne P
SP
Pfeifer
Gilean A T
GA
McVean
Ewa
E
Rajpert-De Meyts
Andrew O M
AO
Wilkie
D000328:Adult; D017677:Age Distribution; D000368:Aged; D000369:Aged, 80 and over; D001483:Base Sequence; D011905:Genes, ras; D020022:Genetic Predisposition to Disease; D006801:Humans; D008297:Male; D008875:Middle Aged; D009154:Mutation; D051498:Receptor, Fibroblast Growth Factor, Type 3 / Q000235:genetics* / Q000378:metabolism; D013094:Spermatozoa / Q000378:metabolism; D013733:Testicular Diseases / Q000151:congenital / Q000235:genetics* / Q000378:metabolism; D013736:Testicular Neoplasms / Q000235:genetics* / Q000378:metabolism
D051498:Receptor, Fibroblast Growth Factor, Type 3