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(E)-2-Methoxy-4-(3-(4-methoxyphenyl) prop-1-en-1-yl) phenol attenuates PMA-induced inflammatory responses in human monocytic cells through PKCdelta/JNK/AP-1 pathways #MMPMID29371085
Kim SJ; Song YS; Pham TH; Bak Y; Lee HP; Hong JT; Yoon DY
Eur J Pharmacol 2018[Apr]; 825 (ä): 19-27 PMID29371085show ga
(E)-2-Methoxy-4-(3-(4-methoxyphenyl) prop-1-en-1-yl) phenol (MMPP), a new (E)-2,4-bis(p-hydroxyphenyl)-2 - butenal derivative, reportedly has therapeutic effects such as anti-arthritic properties. Although previous studies showed that MMPP has anti-arthritic effects on rheumatoid arthritis (RA), the anti-inflammation mechanism of MMPP remains unclear. In this study, phorbol-12-myristate 13-acetate (PMA) was used as an inflammatory stimulus to evaluate the detailed mechanism of the MMPP-mediated anti-inflammatory effect in human monocytic THP-1 cells. We investigated the effects of MMPP on inflammation-related pathways including protein kinase Cdelta (PKCdelta), mitogen-activated protein kinase, and activator protein-1 (AP-1). PMA induced the translocation of PKCs from the cytosol to the membrane and phosphorylated JNK. MMPP inhibited PMA-induced membrane translocation of PKCdelta, phosphorylation of JNK, and nuclear translocation of AP-1, resulting in downregulation of cyclooxygenase-2 and chemokine ligand 5 production. These findings indicate that MMPP inhibits inflammatory responses in THP-1 cells by mitigating PMA-induced activation of PKCdelta and JNK and nuclear translocation of AP-1. Therefore, MMPP may be useful as an anti-inflammatory drug.