miRNA profiling in pancreatic cancer and restoration of chemosensitivity
2013
Singh, Saurabh | Chitkara, Deepak | Kumar, Virender | Behrman, Stephen W. | Mahato, Ram I.
Pancreatic cancers relapse due to small but distinct population of cancer stem cells (CSCs) which are in turn regulated by miRNAs. The present study identifies a series of miRNAs which were either upregulated (e.g. miR-146) or downregulated (e.g. miRNA-205, miRNA-7) in gemcitabine resistant MIA PaCa-2 cancer cells and clinical metastatic pancreatic cancer tissues. Gemcitabine resistant MIA PaCa-2 cells possessed distinct ALDH-positive CSC fraction expressing stem cell markers OCT3/4 and CD44 and chemoresistance marker class IIIβ-tubulin (TUBB3) which decreases on transfection with miR-205 resulting in the restoration of chemosensitivity to gemcitabine.
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