Abstract
Cancer, and more specifically metastatic cancer, continues to be a leading cause of death worldwide. One of the most common organs in which metastatic cancer is diagnosed, and where it is often fatal, is the liver. This is not surprising given the large volume of nutrient-rich blood filtered through the fenestrated sinusoids of the liver. And while progress has been made in our understanding and treatment of metastatic disease, the majority of treatments are still ultimately unsuccessful in the metastatic setting. In the case of liver metastasis, even after apparently successful initial treatment, 5 year survival remains relatively low. Yet, although metastatic disease is associated with poor prognosis, the process of metastasis itself is known to be highly inefficient. The reasons for this inefficiency and the failure of cancer cells to form large vascularised metastases are, at least initially, twofold – cell death and dormancy. Dormant solitary metastatic cells and micrometastases have been proposed to be responsible, at least in part, for treatment failure and recurrence months to decades following initial treatment. Here we review experimental and clinical evidence regarding metastatic dormancy and discuss the implications of dormant cell populations for treatment of metastatic disease.
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- CDK:
-
cyclin dependent kinase
- CDKI:
-
cyclin dependent kinase inhibitor
- CMF:
-
cyclophosphamide, methotrexate, fluorouracil
- CSCs:
-
cancer stem cells
- CTCs:
-
circulating tumor cells
- DTCs:
-
disseminated tumor cells
- FAK:
-
focal adhesion kinase
- MLCK:
-
myosin light chain kinase
- MRI:
-
magnetic resonance imaging
- uPAR:
-
urokinase plasminogen activator receptor
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Acknowledgements
Supported by grant #42511 from the Canadian Institutes of Health Research (to AFC). JLT was supported by a doctoral research award from the Canadian Institutes of Health Research. AFC is Canada Research Chair in Oncology, and receives salary support from the Canada Research Chairs Program.
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Townson, J.L., Chambers, A.F. (2011). Tumor Dormancy in Liver Metastasis: Clinical and Experimental Evidence and Implications for Treatment. In: Brodt, P. (eds) Liver Metastasis: Biology and Clinical Management. Cancer Metastasis - Biology and Treatment, vol 16. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-0292-9_8
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