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Saturday, Apr.20, 2024
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miRNA: |
hsa-miR-21 |
Disease: |
pancreatic cancer |
Relationship type: |
Causal |
Detection method for miRNA expression: |
northern blot, qRT-PCR etc |
Expression pattern of miRNA: |
up-regulated |
Validated targets of miRNA from the reference: |
unknown |
Validated targets of miRNA from TarBase: |
PTEN,TPM1 : More... |
Predicted targets: |
MIRANDA, TARGETSCAN, PICTAR-VERT |
Description: Low nanomolar concentrations of both antisense oligonucleotides reduced proliferation of pancreatic cancer cell lines. Reduced proliferation was less pronounced in the normal ductal epithelial cell line human pancreatic Nestin-expressing cell or in pancreatic cancer cell lines exposed to an irrelevant control oligonucleotide. Inhibition of miR-21 and miR-221 increased the amount of apoptosis in HS766T cells by 3- to 6-fold compared with the control oligonucleotide. HS766T cells exposed to miR-21 antisense resulted in cell cycle arrest (G1 phase). Protein levels of tumor suppressor targets of the miRNAs were increased by antisense to miR-21 (PTEN and RECK) and miR-221 (p27). Antisense to miR-21 and miR-221 sensitized the effects of gemcitabine, and the antisense-gemcitabine combinations were synergistic at high fraction affected. CONCLUSIONS:: We demonstrate that antisense to miR-21 and miR-221 results in significant cell killing under various conditions and that antisense oligonucleotides targeted to miRNA represents a potential new therapy for pancreatic cancer. |
Reference:
Antisense Inhibition of microRNA-21 or -221 Arrests Cell Cycle, Induces Apoptosis, and Sensitizes the Effects of Gemcitabine in Pancreatic Adenocarcinoma | PMID:19730150
Park JK, Lee EJ, Esau C, Schmittgen TD.
Pancreas. 2009 Sep 2. [Epub ahead of print] |
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