Abstract
Bone is one of the most frequent sites for metastasis of breast and prostate cancers. Bone metastases are associated with pathologic changes in bone turnover and severe pain. The mechanisms that trigger these effects are not well understood, but it is postulated that tumour cells release factors which interfere with signalling processes critical to bone homeostasis. We have identified that several cancer cell lines known to cause bone disruption in animal models of bone metastasis appear to secrete glutamate into their extracellular environment in vitro. Although these cells also express specific glutamate receptors, the implications of this potentially disruptive chemical signal are discussed in relation to normal glutamate-dependent communication processes in bone and a possible mechanistic connection is made between tumour cell glutamate release and the development of pathological changes in bone turnover.


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- CNS:
-
Central nervous system
- DMEM:
-
Dulbecco’s modified Eagle’s medium
- EDTA:
-
Ethylenediaminetetraacetic acid (chelating agent)
- MEM:
-
Minimal essential medium
- NMDA:
-
N-methyl-d-aspartate
- NMDAR:
-
N-methyl-d-aspartate receptor (NMDA type glutamate receptor)
- RPMI-1640:
-
Roswell Park Memorial Institute 1640 medium
- RT-PCR:
-
Reverse transcriptase-polymerase chain reaction
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This work was supported by operating grants from the Canadian Institutes of Health Research to G.S.
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Seidlitz, E.P., Sharma, M.K., Saikali, Z. et al. Cancer cell lines release glutamate into the extracellular environment. Clin Exp Metastasis 26, 781–787 (2009). https://doi.org/10.1007/s10585-009-9277-4
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DOI: https://doi.org/10.1007/s10585-009-9277-4