Abstract
Pancreatic cancer is an aggressive solid malignancy with poor response to therapy and the subsequent dismal survival rate has remained a hallmark of this disease. There is evidence to indicate that pancreatic cancer is initiated and propagated by cancer stem cell (CSC)s. The CSC population is defined by its tumor initiating capacity and has been shown to be invasive or metastatic. Loss of genome stability is a hallmark of cancer with DNA repair enzymes aiding in maintenance of stability. The potential to assess the risk of cancer development lies in careful determination of one’s capacity in nurturing genome stability. DNA repair genes are over expressed in CSCs and both pancreatic CSCs and invasive cells in turn provide greater DNA damage response and repair mechanisms. Pancreatic tumor-initiating cells as well as invasive cells have a large number of genes related to DNA repair. RAD51, the key player in the recombinational repair of damaged DNA might act as a critical mediator of efficient DNA repair mechanisms of CSCs. We update here the current research results regarding CSCs in pancreatic cancer progression, metastasis and discuss the DNA repair mechanism in pancreatic CSCs.
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- ALDH:
-
Aldehyde dehydrogenase
- BER:
-
Base excision repair
- CSCs:
-
Cancer stem cells
- CXCR4:
-
CXC chemokine receptor 4
- DSB:
-
Double-strand break
- EMT:
-
Epithelial to mesenchymal transition
- EpCAM:
-
Epithelial cell adhesion molecule
- ESA:
-
Epithelial specific antigen
- HMG CoA:
-
3-hydroxy-3-methylglutaryl coenzyme A reductase
- HR:
-
Homologous recombination
- MMR:
-
Mismatch repair
- NER:
-
Nucleotide excision repair
- NHEJ:
-
Non-homologous end-joining
- PARP:
-
Poly ADP ribose polymerase
- PDAC:
-
Pancreatic ductal adenocarcinoma
- SCs:
-
Stem cells
- SDF-1:
-
Stromal derived factor-1
- SSB:
-
Single-strand break
- TGF-β:
-
Transforming growth factor beta
- ZEB:
-
Zinc-finger transcription factor
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Acknowledgments
We thank Drs. Nipun Merchant, Elaine Hurt, Stephanie Cabarcas, Lesley Mathews and Michael Van Saun for their useful comments and stimulating discussions during the preparation of this manuscript.
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Nagathihalli, N., Brown, E. (2013). Pancreatic Cancer Stem Cells in Tumor Progression, Metastasis, Epithelial-Mesenchymal Transition and DNA Repair. In: Mathews, L., Cabarcas, S., Hurt, E. (eds) DNA Repair of Cancer Stem Cells. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-4590-2_8
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