Abstract
Breast carcinoma is the most common cancer of women. Bones are often involved with breast carcinoma metastases with the resulting morbidity and reduced quality of life. Breast cancer cells arriving at bone tissues mount supportive microenvironment by recruiting and modulating the activity of several host tissue cell types including the specialized bone cells osteoblasts and osteoclasts. Pathologically activated osteoclasts produce osteolytic lesions associated with bone pain, pathological fractures, cord compression and other complications of metastatic breast carcinoma at bone. Over the last decade there has been enormous growth of knowledge in the field of osteoclasts biology both in the physiological state and in the tumor microenvironment. This knowledge allowed the development and implementation of several targeted therapeutics that expanded the armamentarium of the oncologists dealing with the metastases-associated osteolytic disease. While the interactions of cancer cells with resident bone cells at the established metastatic gross lesions are well-studied, the preclinical events that underlie the progression of disseminated tumor cells into micrometastases and then into clinically-overt macrometastases are just starting to be uncovered. In this review, we discuss the established information and the most recent discoveries in the pathogenesis of osteolytic metastases of breast cancer, as well as the corresponding investigational drugs that have been introduced into clinical development.
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Abbreviations
- BCC:
-
Breast Carcinoma Cells
- BIM:
-
Bcl-2-interacting mediator of cell death
- CSC:
-
Cancer Stem Cells
- DTC:
-
Disseminated Tumor Cells
- EMT:
-
Epithelial-Mesenchymal-Transition
- ER:
-
Estrogen Receptors
- GPNMB:
-
Glycoprotein Non-Metastatic B
- HER2:
-
Human Epidermal growth factor Receptor 2
- HSC:
-
Hematopoietic Stem Cells
- ITAM:
-
Immunoreceptor Tyrosine-based Activation Motifs
- MBCC:
-
Metastatic Breast Carcinoma Cells
- MCSF:
-
Macrophage Colony Stimulating Factor
- MSC:
-
Mesenchymal Stem Cells
- mTOR:
-
mammalian Target Of Rapamycin
- NBP:
-
Nitrogen-containing Bisphosphonates
- NFAT:
-
Nuclear Factor of Activated T cell
- OPG:
-
Osteoprotegerin
- PTHrP:
-
Parathyroid Hormone related Protein
- RANKL:
-
Receptor Activator of Nuclear factor κB Ligand
- SRE:
-
Skeletal-Related Events
- SRS:
-
Src Responsive Signature
- TRAIL:
-
TNF-Related Apoptosis Inducing Ligand
- ZA:
-
Zoledronic acid
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Acknowledgments
We apologize to the colleagues whose work was not cited in this review for reasons of space and knowledge limitation. We appreciate the elaborate discussion with our colleagues, with Dr. P.M. Siegel, Dr. M. Murshed and Dr. M. Basik from McGill University. O.H. is supported by the Merit Doctoral Research Scholarship from the Government of Quebec, by Lloyd Carr-Harris Fellowship and by McGill University. S.V.K. holds a Canada Research Chair in Osteoclast Biology.
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Hussein, O., Komarova, S.V. Breast cancer at bone metastatic sites: recent discoveries and treatment targets. J. Cell Commun. Signal. 5, 85–99 (2011). https://doi.org/10.1007/s12079-011-0117-3
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DOI: https://doi.org/10.1007/s12079-011-0117-3