RGD Reference Report - MyD88-mediated signaling prevents development of adenocarcinomas of the colon: role of interleukin 18. - Rat Genome Database

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MyD88-mediated signaling prevents development of adenocarcinomas of the colon: role of interleukin 18.

Authors: Salcedo, Rosalba  Worschech, Andrea  Cardone, Marco  Jones, Yava  Gyulai, Zsofia  Dai, Ren-Ming  Wang, Ena  Ma, Winnie  Haines, Diana  O'hUigin, Colm  Marincola, Francesco M  Trinchieri, Giorgio 
Citation: Salcedo R, etal., J Exp Med. 2010 Aug 2;207(8):1625-36. doi: 10.1084/jem.20100199. Epub 2010 Jul 12.
RGD ID: 150520020
Pubmed: PMID:20624890   (View Abstract at PubMed)
PMCID: PMC2916129   (View Article at PubMed Central)
DOI: DOI:10.1084/jem.20100199   (Journal Full-text)

Signaling through the adaptor protein myeloid differentiation factor 88 (MyD88) promotes carcinogenesis in several cancer models. In contrast, MyD88 signaling has a protective role in the development of azoxymethane (AOM)/dextran sodium sulfate (DSS) colitis-associated cancer (CAC). The inability of Myd88(-/-) mice to heal ulcers generated upon injury creates an altered inflammatory environment that induces early alterations in expression of genes encoding proinflammatory factors, as well as pathways regulating cell proliferation, apoptosis, and DNA repair, resulting in a dramatic increase in adenoma formation and progression to infiltrating adenocarcinomas with frequent clonal mutations in the beta-catenin gene. Others have reported that toll-like receptor (Tlr) 4-deficient mice have a similar susceptibility to colitis to Myd88-deficient mice but, unlike the latter, are resistant to CAC. We have observed that mice deficient for Tlr2 or Il1r do not show a differential susceptibility to colitis or CAC. However, upon AOM/DSS treatment Il18(-/-) and Il18r1(-/-) mice were more susceptible to colitis and polyp formation than wild-type mice, suggesting that the phenotype of Myd88(-/-) mice is, in part, a result of their inability to signal through the IL-18 receptor. This study revealed a previously unknown level of complexity surrounding MyD88 activities downstream of different receptors that impact tissue homeostasis and carcinogenesis.



RGD Manual Disease Annotations    Click to see Annotation Detail View
Object SymbolSpeciesTermQualifierEvidenceWithNotesSourceOriginal Reference(s)
MYD88HumanColonic Polyps  ISOMyd88 (Mus musculus) RGD 
Myd88RatColonic Polyps  ISOMyd88 (Mus musculus) RGD 
Myd88MouseColonic Polyps  IMP  RGD 
MYD88Humandiarrhea  ISOMyd88 (Mus musculus) RGD 
Myd88Ratdiarrhea  ISOMyd88 (Mus musculus) RGD 
Myd88Mousediarrhea  IMP  RGD 

Objects Annotated

Genes (Rattus norvegicus)
Myd88  (MYD88, innate immune signal transduction adaptor)

Genes (Mus musculus)
Myd88  (myeloid differentiation primary response gene 88)

Genes (Homo sapiens)
MYD88  (MYD88 innate immune signal transduction adaptor)


Additional Information