Journal article
Osteoblasts modulate Ca2+ signaling in bone-metastatic prostate and breast cancer cells
Clinical & experimental metastasis, v 26(8), pp 955-964
2009
PMID: 19768662
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Metastatic prostate and breast cancers display a predilection for the skeleton. The high incidence of skeletal metastasis may be a reflection of favorable reciprocal interactions between the bone microenvironment and disseminated cancer cells. Here we show that bone-metastatic PC3-ML prostate cancer cells and MDA-231 breast cancer cells-when co-cultured with human osteoblasts-down-regulate the increase in cytosolic free calcium (Ca(2+)) induced by agonist stimulation. This osteoblast promoted alteration of Ca(2+) signaling develops and reverts in a time-dependent manner. Most importantly, the Ca(2+) responses of cancer cells lacking bone metastatic potential are not affected by osteoblasts. The limited increase in cytosolic Ca(2+) observed in bone-metastatic cells does not result from depleted intracellular Ca(2+) stores but rather a decreased entry of Ca(2+) from the extracellular space. Interestingly, the inhibition of histone deacetylase in cancer cells replicates the changes in Ca(2+) signaling induced by osteoblasts, suggesting the participation of epigenetic mechanisms. Finally, cancer cells harvested from skeletal metastases induced in mice showed Ca(2+) responses identical to cells co-cultured with osteoblasts. However, Ca(2+) signaling in cancer cells recovered from metastases to soft-tissues was not affected, emphasizing the role of the bone microenvironment in regulating the functional behavior of bone-metastatic cells. We propose that osteoblasts protect selected malignant phenotypes from cell death caused by an excessive increase in cytosolic Ca(2+), thereby facilitating their progression into macroscopic skeletal metastases.
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Details
- Title
- Osteoblasts modulate Ca2+ signaling in bone-metastatic prostate and breast cancer cells
- Creators
- Julia D'Ambrosio - Department of Pharmacology and Physiology, Drexel University College of Medicine, 245 N. 15th Street, New College Building, MS488, Philadelphia, PA, 19102, USAAlessandro Fatatis
- Publication Details
- Clinical & experimental metastasis, v 26(8), pp 955-964
- Publisher
- Springer Nature; Netherlands
- Grant note
- GM067892 / NIGMS NIH HHS
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Pharmacology and Physiology
- Web of Science ID
- WOS:000271722400003
- Scopus ID
- 2-s2.0-71849116840
- Other Identifier
- 991014877944604721
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- Web of Science research areas
- Oncology