Dendrosomal curcumin increases expression of the long non-coding RNA gene MEG3 via up-regulation of epi-miRs in hepatocellular cancer.

Phytomedicine : International Journal of Phytotherapy and Phytopharmacology
Mina ZamaniFarhood Najafi

Abstract

Hepatocellular carcinoma is the fifth most common cancer worldwide, with poor prognosis and resistance to chemotherapy. This gives novel cancer treatment methods an overwhelming significance. Epigenetic therapy of cancer is useful in reversing some of the cancer defects because of reversibility of the epigenetic alterations. Non-protein coding transcripts are the major part of our transcriptome. MEG3 is a tumor suppressor long non-coding RNA being expressed in many normal tissues. Methylation of MEG3 promoter region elicits the decrease in its expression in hepatocellular cancer cells. Bioactive nutrients including curcumin offer great potential in altering DNA methylation status which is catalyzed via DNMT1, DNMT3A and 3B. Herein, we aimed to study RNA-based epigenetic effects of dendrosomal curcumin (DNC) on hepatocellular cancer (HCC). To this end miRNA-dependent regulation of MEG3 expression under treatment with DNC was studied by evaluating the modulatory involvement of miR-29a for DNMT3A and 3B and miR-185 for DNMT1. We evaluated DNC entrance to HCC cells with the use of fluorescent characteristics of curcumin. Next we performed the MTT assay to evaluate DNC and dendrosome effects on HCC cell viability. The coding and non...Continue Reading

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