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Mate Choice01:20

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Mate choice—the decision about whom to mate with—is a type of natural selection, since animals must reproduce to pass down their genes. Mate choice is also called intersexual selection because the behavior occurs between the sexes.
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Related Experiment Video

Updated: May 22, 2026

Design and Validation of a Volumetric-extrusion Bioprinter for Bioprinting of Soluble Basement Membrane Extract for Translational Research
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MENX and MEN4.

Natalia S Pellegata1

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

Clinics (Sao Paulo, Brazil)
|May 16, 2012
PubMed
Summary
This summary is machine-generated.

Multiple endocrine neoplasias (MEN) are genetic disorders causing tumors. A new syndrome, MEN4, caused by CDKN1B gene mutations, has been identified in humans, similar to the rat MENX syndrome.

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Area of Science:

  • Genetics
  • Endocrinology
  • Oncology

Background:

  • Multiple endocrine neoplasias (MEN) are inherited disorders involving tumors in multiple endocrine glands.
  • Two well-characterized types, MEN1 and MEN2, result from mutations in MEN1 and RET genes, respectively.
  • A rat model, MENX, with a similar tumor spectrum, was linked to a Cdkn1b gene mutation.

Purpose of the Study:

  • To investigate the genetic basis of MENX and its human relevance.
  • To identify novel causes of multiple endocrine tumors in humans.
  • To characterize the newly identified MEN4 syndrome and its genetic underpinnings.

Main Methods:

  • Genetic analysis of MENX rats to identify causative mutations.
  • Screening of human patients with multiple endocrine tumors for mutations in the CDKN1B gene.
  • Review of MENX and MEN4 syndrome characteristics and p27 protein function.

Main Results:

  • A germline mutation in the Cdkn1b gene was identified as the cause of MENX in 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 human syndrome, MEN4, caused by p27 (encoded by CDKN1B) mutations.

Conclusions:

  • Cdkn1b/CDKN1B is a novel tumor susceptibility gene for multiple endocrine tumors in rats and humans.
  • MEN4, caused by CDKN1B mutations, represents a new category of multiple endocrine neoplasia.
  • Understanding p27's role in MEN4 is crucial for diagnosis and potential therapeutic strategies.