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Selection of bone metastasis seeds by mesenchymal signals in the primary tumor stroma.


ABSTRACT: How organ-specific metastatic traits arise in primary tumors remains unknown. Here, we show a role of the breast tumor stroma in selecting cancer cells that are primed for metastasis in bone. Cancer-associated fibroblasts (CAFs) in triple-negative (TN) breast tumors skew heterogeneous cancer cell populations toward a predominance of clones that thrive on the CAF-derived factors CXCL12 and IGF1. Limiting concentrations of these factors select for cancer cells with high Src activity, a known clinical predictor of bone relapse and an enhancer of PI3K-Akt pathway activation by CXCL12 and IGF1. Carcinoma clones selected in this manner are primed for metastasis in the CXCL12-rich microenvironment of the bone marrow. The evidence suggests that stromal signals resembling those of a distant organ select for cancer cells that are primed for metastasis in that organ, thus illuminating the evolution of metastatic traits in a primary tumor and its distant metastases.

SUBMITTER: Zhang XH 

PROVIDER: S-EPMC3974915 | biostudies-literature | 2013 Aug

REPOSITORIES: biostudies-literature

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Selection of bone metastasis seeds by mesenchymal signals in the primary tumor stroma.

Zhang Xiang H-F XH   Jin Xin X   Malladi Srinivas S   Zou Yilong Y   Wen Yong H YH   Brogi Edi E   Smid Marcel M   Foekens John A JA   Massagué Joan J  

Cell 20130801 5


How organ-specific metastatic traits arise in primary tumors remains unknown. Here, we show a role of the breast tumor stroma in selecting cancer cells that are primed for metastasis in bone. Cancer-associated fibroblasts (CAFs) in triple-negative (TN) breast tumors skew heterogeneous cancer cell populations toward a predominance of clones that thrive on the CAF-derived factors CXCL12 and IGF1. Limiting concentrations of these factors select for cancer cells with high Src activity, a known clini  ...[more]

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