Colon cancer cells colonize the lung from established liver metastases through p38 MAPK signalling and PTHLH
- PMID: 24880666
- DOI: 10.1038/ncb2977
Colon cancer cells colonize the lung from established liver metastases through p38 MAPK signalling and PTHLH
Abstract
The mechanisms that allow colon cancer cells to form liver and lung metastases, and whether KRAS mutation influences where and when metastasis occurs, are unknown. We provide clinical and molecular evidence showing that different MAPK signalling pathways are implicated in this process. Whereas ERK2 activation provides colon cancer cells with the ability to seed and colonize the liver, reduced p38 MAPK signalling endows cancer cells with the ability to form lung metastasis from previously established liver lesions. Downregulation of p38 MAPK signalling results in increased expression of the cytokine PTHLH, which contributes to colon cancer cell extravasation to the lung by inducing caspase-independent death in endothelial cells of the lung microvasculature. The concerted acquisition of metastatic traits in the colon cancer cells together with the sequential colonization of liver and lung highlights the importance of metastatic lesions as a platform for further dissemination.
Comment in
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Integration of microenvironmental and stress signaling antagonizes colorectal cancer progression.EMBO J. 2014 Aug 18;33(16):1737-9. doi: 10.15252/embj.201489364. Epub 2014 Jul 14. EMBO J. 2014. PMID: 25024435 Free PMC article.
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MAPK signaling control of colon cancer metastasis.Cell Cycle. 2014;13(17):2641-2. doi: 10.4161/15384101.2014.946374. Cell Cycle. 2014. PMID: 25486343 Free PMC article. No abstract available.
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