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Updated: Jul 14, 2026

Cell Population Analyses During Skin Carcinogenesis
06:53

Cell Population Analyses During Skin Carcinogenesis

Published on: August 21, 2013

TGF-beta receptor I conditional knockout mice develop spontaneous squamous cell carcinoma

Yasuyuki Honjo1, Yansong Bian, Koji Kawakami

  • 1Functional Genomics Section, Laboratory of Cellular and Developmental Biology, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland 20892, USA.

Cell Cycle (Georgetown, Tex.)
|May 31, 2007
PubMed

Insights

Loss of TGF-beta receptor I in neurons causes spontaneous squamous cell carcinomas (SCCs) in mice. These tumors show immune evasion and respond to targeted therapies, offering a new SCC research model.

Area of Science:

  • Oncology
  • Immunology
  • Neuroscience

Background:

  • Transforming growth factor-beta (TGF-beta) signaling is crucial in development and disease.
  • Dysregulation of TGF-beta signaling is implicated in various cancers.
  • The role of neuronal TGF-beta signaling in tumorigenesis remains largely unexplored.

Purpose of the Study:

  • To investigate the role of neuronal TGF-beta signaling in tumor development.
  • To establish a novel mouse model for studying spontaneous squamous cell carcinomas (SCCs).
  • To explore the potential involvement of immune evasion in SCC formation and therapeutic strategies.

Main Methods:

  • Generated a conditional knockout (COKO) mouse model by crossing TbetaRI floxed mice with NF-H Cre mice.
  • Assessed spontaneous tumor development in COKO mice.
  • Evaluated tumorigenicity via transplantation into athymic nude mice.
  • Analyzed expression of interleukin-13 receptor alpha2 (IL-13R alpha2) in tumors.
  • Tested sensitivity of SCCs to IL-13R-directed cytotoxin treatment.

Main Results:

  • 35% of COKO mice developed spontaneous SCCs in periorbital/perianal regions.
  • Transplanted SCCs exhibited 62% tumorigenicity.
  • 33% of COKO tumors expressed IL-13R alpha2, a marker for immune evasion.
  • SCCs expressing IL-13R alpha2 were sensitive to IL-13R-directed cytotoxins.

Conclusions:

  • Conditional deletion of TbetaRI in neurons leads to spontaneous SCC formation.
  • This mouse model facilitates the study of SCC tumorigenesis and immune evasion.
  • The findings highlight the potential of targeting IL-13R alpha2 in SCC treatment.

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