Cancer in inflammatory bowel disease: lessons from animal models.

Abstract:

PURPOSE OF REVIEW:Human colitis-associated cancers (CAC) represent a heterogeneous group of conditions in which multiple oncogenic pathways are involved. In this article, we review the latest studies using genetic, chemical, bacterial and innate immune-mediated experimental models of CAC. RECENT FINDINGS:Using the azoxymethane-dextran sodium sulfate model, wound healing pathways seem to be required in the development of CAC. There is also an emerging understanding that commensal and/or pathogenic bacteria can promote tumorigenesis, through T cell and TLR-mediated inflammation. Using specific transgenic mice (villin-CD98, T cell SMAD7, villin-TLR4) or specific knockout mice, investigators have determined that derangements in epithelial or innate and adaptive immune pathways can result in CAC. Subtle perturbations in epithelial repair - both too little or too exuberant - can render mice susceptible to tumorigenesis. SUMMARY:With the aid of animal models, we have witnessed a rapid expansion of our knowledge of the molecular and immunologic mechanisms underlying inflammatory cancers. Though animal models have contributed a discrete amount of information to our understanding of tumorigenesis in the setting of intestinal inflammation, it is clear that no single animal model will be able to adequately recapitulate the pathogenesis of complex colorectal cancers, but each model gets us one step closer to comprehending the nature of CAC.

authors

Sussman DA,Santaolalla R,Strobel S,Dheer R,Abreu MT

doi

10.1097/MOG.0b013e328354cc36

subject

Has Abstract

pub_date

2012-07-01 00:00:00

pages

327-33

issue

4

eissn

0267-1379

issn

1531-7056

journal_volume

28

pub_type

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