ANTI-MULLERIAN HORMONE BRUXELLES - A NONSENSE MUTATION ASSOCIATED WITH THE PERSISTENT MULLERIAN DUCT SYNDROME

The persistent Mullerian duct syndrome (PMDS) is characterized by the persistence of Mullerian derivatives, uterus and tubes, in otherwise normally virilized males. In a previous study, we showed that this syndrome is heterogeneous, with lack of production of anti-Mullerian hormone (AMH) by testicular tissue accounting for only some, AMH-negative, cases of this disorder. We have characterized the point mutation responsible for an AMH-negative PMDS in three siblings: a guanine to thymine transversion at position 2096 in the fifth exon changes a GAA triplet, coding for glutamic acid, to a TAA stop codon. The mutation could also be recognized, using the polymerase chain reaction, on RNA produced in trace amounts by a lymphoblastic cell line. The translation product, although undetectable in testicular tissue, could be visualized in culture medium of cells transfected with the mutant gene.