Large genomic deletions in AIP in pituitary adenoma predisposition

Marianthi Georgitsi, Elina Heliövaara, Ralf Paschke, Ajith V K Kumar, Marc Tischkowitz, Outi Vierimaa, Pasi Salmela, Timo Sane, Ernesto De Menis, Salvatore Cannavò, Sadi Gündogdu, Anneke Lucassen, Louise Izatt, Simon Aylwin, Gul Bano, Shirley Hodgson, Christian A Koch, Auli Karhu, Lauri A Aaltonen

Research output: Contribution to journalArticlepeer-review

75 Citations (Scopus)

Abstract

CONTEXT: Germline mutations in AIP have been recently shown to cause pituitary adenoma predisposition (PAP). Subsequently, many intragenic germline mutations have been reported, both in familial and in sporadic settings.

OBJECTIVE: Our objective was to evaluate the possible contribution of large genomic germline AIP deletions, an important mutation type in tumor predisposition syndromes, in PAP.

DESIGN: Here, we applied the multiplex ligation-dependent probe amplification assay to examine whether large genomic AIP or MEN1 alterations account for a subset of PAP cases.

PATIENTS: The study was performed on familial and sporadic pituitary adenoma cases of European origin, which had previously tested negative for germline AIP and MEN1 mutations by sequencing.

RESULTS: Two of 21 pituitary adenoma families (9.5%) were found to harbor an AIP deletion. No copy number changes were detected among 67 sporadic pituitary adenoma patients. No MEN1 deletions were found.

CONCLUSIONS: The present study shows that large genomic AIP deletions account for a subset of PAP. Therefore, in suspected PAP cases undergoing counseling and AIP genetic testing, multiplex ligation-dependent probe amplification could be considered if direct sequencing does not identify a mutation.

Original languageEnglish
Pages (from-to)4146-51
Number of pages6
JournalJournal of Clinical Endocrinology and Metabolism
Volume93
Issue number10
DOIs
Publication statusPublished - Oct 2008

Keywords

  • Adenoma/genetics
  • Adolescent
  • Adult
  • Base Sequence
  • DNA Mutational Analysis
  • Family
  • Female
  • Gene Deletion
  • Genetic Predisposition to Disease
  • Germ-Line Mutation
  • Humans
  • Intracellular Signaling Peptides and Proteins/genetics
  • Male
  • Middle Aged
  • Molecular Sequence Data
  • Pituitary Neoplasms/genetics
  • Precancerous Conditions/genetics

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