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Piperlongumine Inhibits NF-κB Activity and Attenuates Aggressive Growth Characteristics of Prostate Cancer Cells

Overview
Journal Prostate
Date 2013 Oct 24
PMID 24151226
Citations 39
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Abstract

Background: Elevated NF-κB activity has been previously demonstrated in prostate cancer cell lines as hormone-independent or metastatic characteristics develop. We look at the effects of piperlongumine (PL), a biologically active alkaloid/amide present in piper longum plant, on the NF-κB pathway in androgen-independent prostate cancer cells.

Methods: NF-κB activity was evaluated using Luciferase reporter assays and Western blot analysis of p50 and p65 nuclear translocation. IL-6, IL-8, and MMP-9 levels were assessed using ELISA. Cellular adhesion and invasiveness properties of prostate cancer cells treated with PL were also assessed.

Results: NF-κB DNA-binding activity was directly down-regulated with increasing concentrations of PL, along with decreased nuclear translocation of p50 and p65 subunits. Expression of IL-6, IL-8, MMP-9, and ICAM-1 was attenuated, and a decrease of cell-to-matrix adhesion and invasiveness properties of prostate cancer cells were observed.

Conclusions: PL-mediated inhibition of NF-κB activity decreases aggressive growth characteristics of prostate cancer cells in vitro.

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