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BMPR2 loss in fibroblasts promotes mammary carcinoma metastasis via increased inflammation
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BMPR2 loss in fibroblasts promotes mammary carcinoma metastasis via increased inflammation
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Journal Article
BMPR2 loss in fibroblasts promotes mammary carcinoma metastasis via increased inflammation
2015
Overview
Bone Morphogenetic Protein (BMP) receptors mediate a diverse range of signals to regulate both development and disease. BMP activity has been linked to both tumor promoting and suppressive functions in both tumor cells and their surrounding microenvironment. We sought to investigate the requirement for BMPR2 in stromal fibroblasts during mammary tumor formation and metastasis. We utilized FSP1 (Fibroblast Specific Protein-1) promoter driven Cre to genetically delete BMPR2 in mice expressing the MMTV.PyVmT mammary carcinoma oncogene. We found that abrogation of stromal BMPR2 expression via FSP1 driven Cre resulted in increased tumor metastasis. Additionally, similar to epithelial BMPR2 abrogation, stromal loss of BMPR2 results in increased inflammatory cell infiltration. We proceeded to isolate and establish fibroblast cell lines without BMPR2 and found a cell autonomous increase in inflammatory cytokine secretion. Fibroblasts were co-implanted with syngeneic tumor cells and resulted in accelerated tumor growth and increased metastasis when fibroblasts lacked BMPR2. We observed that the loss of BMPR2 results in increased chemokine expression, which facilitates inflammation by a sustained increase in myeloid cells. The chemokines increased in BMPR2 deleted cells correlated with poor outcome in human breast cancer patients. We conclude that BMPR2 has tumor suppressive functions in the stroma by regulating inflammation.
•Stromal deletion of BMPR2 increases metastasis in a breast cancer mouse model.•Fibroblasts with deletion of BMPR2 have elevated cytokines and chemokines.•BMPR2 KO fibroblasts promote breast cancer metastasis and myeloid cell infiltration.•Chemokines from BMPR2 deleted fibroblasts correlate with invasive breast cancer.
Publisher
Elsevier B.V,John Wiley & Sons, Inc,John Wiley and Sons Inc
Subject
/ Bone morphogenetic protein receptor type II
/ Bone Morphogenetic Protein Receptors, Type II - genetics
/ Bone Morphogenetic Protein Receptors, Type II - metabolism
/ Breast Neoplasms - metabolism
/ Breast Neoplasms - pathology
/ Carcinoma-associated-fibroblast
/ Female
/ Grants
/ Humans
/ Kinases
/ Ligands
/ Lungs
/ Mammary Neoplasms, Experimental - genetics
/ Mammary Neoplasms, Experimental - metabolism
/ Mammary Neoplasms, Experimental - pathology
/ Mice
/ Stroma
/ Tumor Suppressor Proteins - genetics
/ Tumor Suppressor Proteins - metabolism
/ Tumors
