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Researchers at IRB discover a key regulator of colon cancer
Date:3/27/2014

at IRB, BBVA Foundation Cancer Research Professor and ICREA research professor.

p38 suppresses pre-tumoral stages characterized by colon inflammation

The role of p38 in cancer is not clear cut. In this same study, Indian-born Jalaj Gupta who recently obtained his PhD in Nebreda's lab and is first author of the work, demonstrates that this same protein in a pre-tumoral context, favoured by inflammation of the colonalso known as colitisimpedes tumour development. It is well-known that patients with chronic inflammation of the intestine, such as that caused by Crohn's disease, have a greater incidence of colon tumours that the healthy population. In order to study the relationship between inflammation and cancer, Nebreda's team use mouse models that reproduce this inflammatory context. "Given that p38 regulates inflammation and also functions as a tumour suppressor in some mouse models, our study addressed how these two functions are integrated during the colon tumorigenesis associated with inflammation", says Gupta.

An important finding of the present study is related to the contribution of p38 to the maintenance of an intact epithelial barrier, a structure that protects the intestine from toxic agents and pathogens. Mice genetically depleted of p38 in the epithelial cells that form the intestinal barrier were subjected to a cancer-inducing protocol that causes mutations and inflammation. These animals developed twice as many tumours as a group of p38-expressing mice subjected to the same protocol. The tumour-suppressing capacity of p38 has also been described in cancer of the liver and lung. "Our study highlights the complexity of p38 functions, both in cancer and in the normal maintenance of tissues, and shows why an inhibitor of this molecule could effectively have undesirable side effects. This is why it is necessary to study in depth the patients and contexts in which treatment with such inhibitors would be suitable," explains G
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Contact: Sònia Armengou
armengou@irbbarcelona.org
34-934-037-255
Institute for Research in Biomedicine (IRB Barcelona)
Source:Eurekalert  

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