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Oridonin alters the expression profiles of MicroRNAs in BxPC-3 human pancreatic cancer cells.

Abstract
BACKGROUND: Oridonin, an ingredient used in traditional Chinese medicine, has been demonstrated to play an important role in antitumour effects, but the mechanism underlying its antitumour properties is still not clear.

METHODS:To verify the anti-cancer effects of oridonin via a miRNA-dependent mechanism, comprehensive miRNA expression profiling of oridonin-treated BxPC-3 human pancreatic cancer cells was performed using a miRNA microarray assay based on Sanger miR-Base Release 20, followed by a validation using real-time PCR. MicroRNA target prediction and Gene Ontology and KEGG pathway analysis were performed to investigate possible pathways involved.

RESULTS:The results showed that 105 miRNAs were significantly differentially expressed (signal reading >500, p ¡Ü 0.01, |Log2-value| ¡Ý1) in oridonin-treated BxPC-3 human pancreatic cancer cells.

CONCLUSIONS: Our data indicates that oridonin inhibits BxPC-3 cells probably through regulating the expression of miRNAs. Interruption of miRNA profiling may provide new therapeutic methods for the clinical treatment of pancreatic cancer.
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