AUTHOR=Xie Jing , Luo Feng-xian , Shi Chong-ying , Jiang Wei-wei , Qian Ying-yan , Yang Ming-rong , Song Shuang , Dai Tian-yi , Peng Lei , Gao Xiao-yu , Tao Liang , Tian Yang , Sheng Jun 

TITLE=Moringa oleifera Alkaloids Inhibited PC3 Cells Growth and Migration Through the COX-2 Mediated Wnt/β-Catenin Signaling Pathway

JOURNAL=Frontiers in Pharmacology

VOLUME=11

YEAR=2020

URL=https://www.frontiersin.org/journals/pharmacology/articles/10.3389/fphar.2020.523962

DOI=10.3389/fphar.2020.523962

ISSN=1663-9812

ABSTRACT=<p><italic>Moringa oleifera</italic> Lam. (<italic>M. oleifera</italic>) is valuable plant distributed in many tropical and subtropical countries. It has a number of medicinal uses and is highly nutritious. <italic>M. oleifera</italic> has been shown to inhibit tumor cell growth, but this effect has not been demonstrated on prostate cancer cells. In this study, we evaluated the inhibitory effect of <italic>M. oleifera</italic> alkaloids (MOA) on proliferation and migration of PC3 human prostate cancer cells <italic>in vitro</italic> and <italic>in vivo</italic>. Furthermore, we elucidated the mechanism of these effects. The results showed that MOA inhibited proliferation of PC3 cells and induced apoptosis and cell cycle arrest. Furthermore, MOA suppressed PC3 cell migration and inhibited the expression of matrix metalloproteinases (MMP)-9. In addition, MOA significantly downregulated the expression of cyclooxygenase 2 (COX-2), β-catenin, phosphorylated glycogen synthase 3β, and vascular endothelial growth factor, and suppressed production of prostaglandin E<sub>2</sub> (PGE<sub>2</sub>). Furthermore, FH535 (β-catenin inhibitor) and MOA reversed PGE<sub>2</sub>-induced PC3 cell proliferation and migration, and the effects of MOA and FH535 were not additive. <italic>In vivo</italic> experiments showed that MOA (150 mg/kg) significantly inhibited growth of xenograft tumors in mice, and significantly reduced the protein expression levels of COX-2 and β-catenin in tumor tissues. These results indicate that MOA inhibits the proliferation and migration, and induces apoptosis and cell cycle arrest of PC3 cells. Additionally, MOA inhibits the proliferation and migration of PC3 cells through suppression of the COX-2 mediated Wnt/β-catenin signaling pathway.</p>