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Defining Gene Functions in Tumorigenesis by Ex vivo Ablation of Floxed Alleles in Malignant Peripheral Nerve Sheath Tumor Cells
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Conditional inactivation of the mouse Wwox tumor suppressor gene recapitulates the null phenotype

Suhaib K Abdeen1, Sara Del Mare, Sadeeq Hussain

  • 1Lautenberg Center for Immunology and Cancer Research, IMRIC, Hebrew University-Hadassah Medical School, Jerusalem, Israel.

Journal of Cellular Physiology
|December 21, 2012
PubMed

Insights

WW domain-containing oxidoreductase (WWOX) is crucial for development and tumor suppression. Conditional knockout mice models reveal WWOX inactivation causes lethality and bone defects, aiding research into its diverse roles.

Area of Science:

  • Genetics
  • Molecular Biology
  • Developmental Biology

Background:

  • WW domain-containing oxidoreductase (WWOX) is a tumor suppressor gene located at the FRA16D fragile site.
  • WWOX inactivation is implicated in various human cancers.
  • Previous studies modeled WWOX deficiency, showing complex phenotypes including developmental defects and osteosarcomas.

Purpose of the Study:

  • To generate and characterize a conditional knockout mouse model for WWOX.
  • To investigate the tissue-specific and developmental roles of WWOX.
  • To understand WWOX function in different physiological and pathological contexts.

Main Methods:

  • Generation of Wwox conditional knockout mice with loxp sites flanking exon 1.
  • Cre-mediated recombination using EIIA-Cre (germline expression).
  • Phenotypic analysis including survival, bone mineralization, and tumor development.

Main Results:

  • Germline-specific WWOX ablation resulted in postnatal lethality by 3 weeks.
  • Conditional knockout mice exhibited decreased bone mineralization, similar to conventional WWOX null mice.
  • The model recapitulates aspects of WWOX deficiency, including lethality and bone defects.

Conclusions:

  • Conditional Wwox knockout mice provide a valuable tool for studying WWOX function.
  • This model allows for investigation of WWOX roles in specific tissues and developmental stages.
  • Understanding WWOX's multifaceted roles is critical for cancer research and developmental biology.

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