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Updated: May 16, 2026

A Reverse Genetic Approach to Test Functional Redundancy During Embryogenesis
06:59

A Reverse Genetic Approach to Test Functional Redundancy During Embryogenesis

Published on: August 11, 2010

The transformation suppressor gene Reck is required for postaxial patterning in mouse forelimbs

Mako Yamamoto1, Tomoko Matsuzaki, Rei Takahashi

  • 1Department of Molecular Oncology ; Global COE Program.

Biology Open
|December 6, 2012
PubMed

Insights

Reduced expression of the RECK protein causes limb abnormalities in mice, affecting skeletal development. This highlights RECK

Area of Science:

  • Developmental Biology
  • Skeletal Biology
  • Molecular Biology

Background:

  • The membrane-anchored metalloproteinase-regulator RECK is known for its tumor suppressor functions.
  • Understanding RECK's role beyond cancer is crucial for developmental insights.

Purpose of the Study:

  • To investigate the function of RECK in mammalian limb development.
  • To elucidate the molecular mechanisms underlying RECK-associated limb defects.

Main Methods:

  • Analysis of mice with reduced Reck expression (low-Reck mutants).
  • Examination of limb bud morphology, gene expression (Wnt7a, Igf2), and signaling centers (ZPA, AER).
  • Mesenchyme-specific Reck inactivation and assessment of teratogen effects on Reck expression.

Main Results:

  • Reduced Reck expression leads to right-dominant, forelimb-specific skeletal defects.
  • Low-Reck mutants exhibit altered dorsal ectoderm with decreased Wnt7a and Igf2 expression.
  • Hypotrophy in the zone of polarizing activity (ZPA) and apical ectodermal ridge (AER) signaling centers was observed.
  • Mesenchyme-specific Reck inactivation replicated the observed limb abnormalities.
  • Certain teratogens were found to downregulate Reck in mesenchymal cells.

Conclusions:

  • RECK plays a critical role in the mesenchymal-epithelial interactions necessary for normal limb development.
  • Dysregulation of RECK impacts key signaling pathways and structures essential for limb patterning and outgrowth.
  • These findings reveal a novel function for RECK in embryonic development, distinct from its established tumor suppressor role.
Keywords:
Cutaneous hornLimb patterningMouseReckTeratogensWnt7a

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