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Transcription factor c-Myb inhibits breast cancer lung metastasis by suppression of tumor cell seeding.


ABSTRACT: Metastasis accounts for most of cancer-related deaths. Paracrine signaling between tumor cells and the stroma induces changes in the tumor microenvironment required for metastasis. Transcription factor c-Myb was associated with breast cancer (BC) progression but its role in metastasis remains unclear. Here we show that increased c-Myb expression in BC cells inhibits spontaneous lung metastasis through impaired tumor cell extravasation. On contrary, BC cells with increased lung metastatic capacity exhibited low c-Myb levels. We identified a specific inflammatory signature, including Ccl2 chemokine, that was expressed in lung metastatic cells but was suppressed in tumor cells with higher c-Myb levels. Tumor cell-derived Ccl2 expression facilitated lung metastasis and rescued trans-endothelial migration of c-Myb overexpressing cells. Clinical data show that the identified inflammatory signature, together with a MYB expression, predicts lung metastasis relapse in BC patients. These results demonstrate that the c-Myb-regulated transcriptional program in BCs results in a blunted inflammatory response and consequently suppresses lung metastasis.

SUBMITTER: Knopfova L 

PROVIDER: S-EPMC6711763 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature

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Transcription factor c-Myb inhibits breast cancer lung metastasis by suppression of tumor cell seeding.

Knopfová L L   Biglieri E E   Volodko N N   Masařík M M   Hermanová M M   Glaus Garzón J F JF   Dúcka M M   Kučírková T T   Souček K K   Šmarda J J   Beneš P P   Borsig L L  

Oncogene 20171030 8


Metastasis accounts for most of cancer-related deaths. Paracrine signaling between tumor cells and the stroma induces changes in the tumor microenvironment required for metastasis. Transcription factor c-Myb was associated with breast cancer (BC) progression but its role in metastasis remains unclear. Here we show that increased c-Myb expression in BC cells inhibits spontaneous lung metastasis through impaired tumor cell extravasation. On contrary, BC cells with increased lung metastatic capacit  ...[more]

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