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Related Experiment Video

Updated: May 22, 2026

Analysis of Multidimensional Microscopy Data Using Cell-ACDC
06:17

Analysis of Multidimensional Microscopy Data Using Cell-ACDC

Published on: November 7, 2025

MENX.

Natalia S Pellegata1

  • 1Institute of Pathology, Helmholtz Zentrum München-German Research Center for Environmental Health, Neuherberg, Germany. natalia.pellegata@helmholtz-muenchen.de

Annales D'Endocrinologie
|May 1, 2012
PubMed
Summary
This summary is machine-generated.

Multiple endocrine neoplasias (MEN) are hereditary disorders. A new form, MEN4, caused by CDKN1B mutations (p27), was discovered, linking rat MENX and human MEN syndromes.

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Area of Science:

  • Endocrinology
  • Genetics
  • Oncology

Background:

  • Multiple endocrine neoplasias (MEN) are hereditary disorders affecting neuroendocrine tissues.
  • MEN type 1 (MEN1) and MEN type 2 (MEN2) are caused by mutations in MEN1 and RET genes, respectively.
  • A rat model, MENX, with features of both MEN1 and MEN2 was identified.

Purpose of the Study:

  • To investigate the genetic basis of the MENX rat syndrome.
  • To identify novel genetic causes for human multiple endocrine tumors.
  • To explore the role of p27 in endocrine tumor development.

Main Methods:

  • Genetic studies in rats to identify the causative mutation for MENX.
  • Screening of the human CDKN1B gene in patients with multiple endocrine tumors.
  • Review of phenotypic features and genetics of MENX.
  • Analysis of p27 function and its alteration in MENX.

Main Results:

  • The Cdkn1b gene mutation causing p27 deficiency was identified in MENX rats.
  • Heterozygous germline mutations in the human CDKN1B gene were found in patients with multiple endocrine tumors.
  • This led to the recognition of a new syndrome, MEN4, caused by p27 mutations.
  • Cdkn1b/CDKN1B was identified as a novel tumor susceptibility gene.

Conclusions:

  • The discovery of MEN4 expands the understanding of hereditary endocrine tumor syndromes.
  • CDKN1B mutations represent a new cause of multiple endocrine tumors in humans.
  • The MENX rat model serves as a valuable platform for preclinical studies, particularly for pituitary adenomas.