Molecular pathology of multiple endocrine neoplasia type I: Two novel germline mutations and updated classification of mutations affecting MEN1 gene

Jesús M. Martín-Campos, Lluis Catasús, Ana Chico, Carmen Mayoral, Elena Lagarda, Luis Gallart, Eugenia Mato, José Rodríguez-Espinosa, Xavier Matías-Guiu, Alberto De Leiva, Francisco Blanco-Vaca

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Abstract

Multiple endocrine neoplasia type 1 (MEN1) is an autosomal dominant disorder characterized by the combined development of tumors in several endocrine glands and other tissues. The MEN1 gene was recently identified and isolated by positional cloning. This gene was screened in two unrelated MEN1 Spanish kindreds (with four affected members and seven asymptomatic members) using single-strand conformation polymorphism, DNA sequencing, and restriction enzyme analysis. Two novel germline mutations were identified: a missense in exon 2 (H139R) and a splice-site in intron 9 (1461-2A>C). These findings allowed us to identify the MEN1 carriers among the seven asymptomatic members analyzed. An updated review of the mutations and polymorphisms found in the analysis of the MEN1 gene is provided. The report of all germline mutations causing MEN1 and easy access to this updated information are both of special diagnostic interest, because this greatly facilitates the task of attributing the disorder to a specific mutation found in a given MEN1 family. This is especially helpful in the critical differentiation of missense mutations from nonsynonymous polymorphisms that fit the pattern of segregation of the disease, but do not cause it.
Original languageEnglish
Pages (from-to)195-204
JournalDiagnostic Molecular Pathology
Volume8
Issue number4
DOIs
Publication statusPublished - 1 Dec 1999

Keywords

  • Genetic diagnosis
  • Menin
  • Multiple endocrine neoplasia
  • Mutation detection

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    Martín-Campos, J. M., Catasús, L., Chico, A., Mayoral, C., Lagarda, E., Gallart, L., Mato, E., Rodríguez-Espinosa, J., Matías-Guiu, X., De Leiva, A., & Blanco-Vaca, F. (1999). Molecular pathology of multiple endocrine neoplasia type I: Two novel germline mutations and updated classification of mutations affecting MEN1 gene. Diagnostic Molecular Pathology, 8(4), 195-204. https://doi.org/10.1097/00019606-199912000-00005