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2017 ; 8
(ä): 1106
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Translational Significance for Tumor Metastasis of Tumor-Associated Macrophages
and Epithelial-Mesenchymal Transition
#MMPMID28955335
Song W
; Mazzieri R
; Yang T
; Gobe GC
Front Immunol
2017[]; 8
(ä): 1106
PMID28955335
show ga
The tumor microenvironment determines development and progression of many
cancers. Epithelial-mesenchymal transition (EMT) is fundamental to tumor
progression and metastasis not only by increasing invasiveness but also by
increasing resistance to cell death, senescence, and various cancer therapies;
determining inflammation and immune surveillance; and conferring stem cell
properties. It does this by enabling polarized epithelial cells to transform into
cells with a mesenchymal, and therefore motile, phenotype. Tumor-associated
macrophages (TAMs) are key cells of the tumor microenvironment that orchestrate
the connection between inflammation and cancer. Activation of EMT often requires
crosstalk between cancer cells and components of the local tumor
microenvironment, including TAMs. In this review, clinical and experimental
evidence is presented for control of TAMs in promoting cancer cell invasion and
migration and their interaction with the EMT process in the metastatic cascade.
The translational significance of these findings is that the signaling pathways
that interconnect TAMs and EMT-modified cancer cells may represent promising
therapeutic targets for the treatment of tumor metastasis.