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Modulating Bone Marrow Hematopoietic Lineage Potential to Prevent Breast Cancer Bone Metastasis

ABSTRACT: The presence of disseminated tumor cells in patient bone marrow (BM) aspirates predicts decreased recurrence-free survival, yet little is known about whether hematopoietic BM cells impact bone metastases. Here, we report that the BM can be rendered metastasis-suppressive by the bone-targeting bisphosphonate, zoledronic acid (ZA). In particular, ZA modulates hematopoietic myeloid/osteoclast progenitor cell (M/OCP) lineage potential to render them metastasis-suppressive. Granulocyte-colony stimulating factor (G-CSF) promotes resistance to ZA by re-directing M/OCP differentiation. We identified BM transcriptional programs that associate with metastasis suppression and resistance to ZA. Analysis of patient blood samples taken at randomization revealed that women with plasma G-CSF levels >23 pg/mL experienced significantly worse outcome with adjuvant ZA than those on ZA who had lower plasma G-CSF levels. Our findings establish that hematopoietic cells and M/OCP lineage potential profoundly impact bone metastasis and support the discovery of biomarkers that stratify therapeutic responses in patients at risk of recurrence.

ORGANISM(S): Mus musculus

PROVIDER: GSE108250 | GEO | 2021/02/25

REPOSITORIES: GEO

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