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

Yasuyuki Honjo, Yansong Bian, Koji Kawakami, Alfredo Molinolo, Glenn Longenecker, Ramanamurthy Boppana, Jonas Larsson, Stefan Karlsson, J. Silvio Gutkind, Raj K. Puri, Ashok B. Kulkarni

Research output: Contribution to journalArticlepeer-review

Abstract

We generated a mouse model with a conditional deletion of TGF-beta signaling in the neurons by crossing TGF-beta receptor I (T beta RI) floxed mice with neurofilament-H (NF-H) Cre mice. 35% of F1 conditional knockout (COKO) mice developed spontaneous squamous cell carcinomas (SCCs) in periorbital and/ or perianal regions. Transplantation of these tumors into athymic nude mice resulted in 62% tumorigenicity. To determine whether evasion of the immune response plays any role in this tumorigenesis, we analyzed the expression levels of receptors for interleukin-13 (mIL-13R), a key negative regulator of tumor immunosurveillance, and found that 33% of COKO tumors expressed the IL-13R alpha 2 chain. Primary cultures of the SCCs expressing IL-13R alpha 2 were sensitive to the cytotoxic effect of IL-13R-directed cytotoxin treatment. This is the first demonstration that loss of T beta RI can lead to spontaneous tumor formation. These mice can serve as a unique mouse model of SCC to evaluate the tumorigenicity and effect of anti-cancer therapeutics.
Original languageEnglish
Pages (from-to)1360-1366
JournalCell Cycle
Volume6
Issue number11
Publication statusPublished - 2007

Subject classification (UKÄ)

  • Cell Biology

Free keywords

  • TGF-beta
  • Cre-lox P system
  • IL-13
  • TGF-beta receptor I
  • squamous cell carcinoma
  • cytotoxin
  • head and neck cancer

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