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Homing of Hematopoietic Cells to the Bone Marrow
Published on: March 18, 2009
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Modulating Bone Marrow Hematopoietic Lineage Potential to Prevent Bone Metastasis in Breast Cancer
Jessalyn M Ubellacker1,2, Ninib Baryawno3,4,5, Nicolas Severe3,4,5
1Hematology Division, Brigham & Women's Hospital, Boston, Massachusetts.
Cancer Research
|August 2, 2018
Summary
Targeting bone marrow myeloid cells with zoledronic acid (ZA) suppresses breast cancer metastasis. However, granulocyte-colony stimulating factor (G-CSF) can cause resistance, impacting treatment outcomes.
Area of Science:
- Oncology
- Hematopoiesis
- Cancer Metastasis
Background:
- Disseminated tumor cells in bone marrow correlate with reduced recurrence-free survival in breast cancer patients.
- The impact of targeting hematopoiesis on limiting bone metastasis is not well understood.
- Bisphosphonates like zoledronic acid (ZA) are used in cancer therapy, but their effect on bone metastasis via hematopoiesis requires further investigation.
Purpose of the Study:
- To investigate whether targeting hematopoiesis can limit breast cancer bone metastasis.
- To determine the mechanism by which zoledronic acid (ZA) exerts metastasis-suppressive effects in the bone marrow.
- To identify factors influencing resistance to ZA treatment and their clinical relevance.
Main Methods:
- Utilized preclinical breast cancer models to assess the effects of zoledronic acid (ZA) on bone marrow and metastasis.
- Analyzed the modulation of hematopoietic myeloid/osteoclast progenitor cell (M/OCP) lineage potential by ZA.
- Investigated the role of granulocyte-colony stimulating factor (G-CSF) in mediating ZA resistance.
- Performed transcriptional profiling of M/OCP and bone marrow cells.
- Analyzed patient blood samples to correlate G-CSF levels with ZA treatment outcomes.
Main Results:
- Zoledronic acid (ZA) treatment in preclinical models resulted in metastasis-suppressive bone marrow.
- ZA modulated M/OCP lineage potential, activating metastasis-suppressive activity.
- Granulocyte-colony stimulating factor (G-CSF) conferred resistance to ZA by altering M/OCP differentiation.
- Identified distinct transcriptional programs associated with metastasis suppression and ZA resistance.
- High plasma G-CSF levels in patients predicted a worse outcome with adjuvant ZA therapy.
Conclusions:
- Bone marrow M/OCP lineage potential significantly influences breast cancer bone metastasis.
- Hematopoiesis can be modulated by bone-targeting agents like ZA to suppress metastasis.
- G-CSF plays a critical role in ZA resistance, highlighting its importance as a potential biomarker.
- Findings support the development of novel therapeutic strategies targeting M/OCP lineage and biomarkers for patient stratification.
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