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MiRNA profiling in pancreatic cancer and restoration of chemosensitivity

机译:胰腺癌中的miRNA谱分析和化学敏感性的恢复

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摘要

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 III. β-tubulin (TUBB3) which decreases on transfection with miR-205 resulting in the restoration of chemosensitivity to gemcitabine.
机译:胰腺癌的复发是由于癌症干细胞(CSC)的数量少而又不同,而癌症干细胞又受miRNA调控。本研究鉴定了在吉西他滨耐药的MIA PaCa-2癌细胞和临床转移性胰腺癌组织中上调(例如miR-146)或下调(例如miRNA-205,miRNA-7)的一系列miRNA。吉西他滨耐药的MIA PaCa-2细胞具有独特的ALDH阳性CSC组分,表达干细胞标记OCT3 / 4和CD44以及化学抗性标记III类。 β-微管蛋白(TUBB3)在用miR-205转染时减少,导致对吉西他滨的化学敏感性恢复。

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