Germline CDKN1B/p27Kip1 mutation in multiple endocrine neoplasia

Marianthi Georgitsi, Anniina Raitila, Auli Karhu, Rob B van der Luijt, Cora M Aalfs, Timo Sane, Outi Vierimaa, Markus J Mäkinen, Karoliina Tuppurainen, Ralph Paschke, Oliver Gimm, Christian A Koch, Sadi Gündogdu, Anneke Lucassen, Marc Tischkowitz, Louise Izatt, Simon Aylwin, Gul Bano, Shirley Hodgson, Ernesto De MenisVirpi Launonen, Pia Vahteristo, Lauri A Aaltonen

Research output: Contribution to journalArticlepeer-review

225 Citations (Scopus)

Abstract

CONTEXT: Germline mutations in the MEN1 gene predispose to multiple endocrine neoplasia type 1 (MEN1) syndrome, but in up to 20-25% of clinical MEN1 cases, no MEN1 mutations can be found. Recently, a germline mutation in the CDKN1B gene, encoding p27(Kip1), was reported in one suspected MEN1 family with two acromegalic patients.

OBJECTIVE: Our objective was to evaluate the role of CDKN1B/p27(Kip1) in human tumor predisposition in patients clinically suspected of MEN1 but testing negative for MEN1 germline mutation as well as in familial and sporadic acromegaly/pituitary adenoma patients.

DESIGN: Genomic DNA was analyzed for germline mutations in the CDKN1B/p27(Kip1) gene by PCR amplification and direct sequencing.

SETTING: The study was conducted at nonprofit academic research and medical centers.

PATIENTS: Thirty-six Dutch and one German suspected MEN1 patient, who previously tested negative for germline MEN1 gene mutations, were analyzed. In addition, 19 familial and 50 sporadic acromegaly/pituitary adenoma patients from Europe and the United States were included in the study.

MAIN OUTCOME MEASURES: We analyzed germline CDKN1B/p27(Kip1) mutations in individuals with pituitary adenoma and MEN1-like features.

RESULTS: A heterozygous 19-bp duplication (c.59_77dup19) leading to a truncated protein product was identified in one Dutch patient with suspected MEN1 phenotype, pituitary adenoma, carcinoid tumor, and hyperparathyroidism (one of 36, 2.8%). No mutations were detected in either familial or sporadic acromegaly/pituitary adenoma patients.

CONCLUSIONS: Our results support the previous finding that germline CDKN1B/p27(Kip1) mutations predispose to a human MEN1-like condition. However, such mutations appear uncommon in suspected MEN1 cases and rare or nonexistent in familial or sporadic acromegaly/pituitary adenoma patients.

Original languageEnglish
Pages (from-to)3321-5
Number of pages5
JournalJournal of Clinical Endocrinology and Metabolism
Volume92
Issue number8
DOIs
Publication statusPublished - Aug 2007

Keywords

  • Amino Acid Sequence
  • Computer Simulation
  • Cyclin-Dependent Kinase Inhibitor p27
  • DNA/genetics
  • DNA Mutational Analysis
  • Germ-Line Mutation
  • Humans
  • Immunohistochemistry
  • Intracellular Signaling Peptides and Proteins/genetics
  • Molecular Sequence Data
  • Multiple Endocrine Neoplasia Type 1/genetics
  • Reverse Transcriptase Polymerase Chain Reaction

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