Biomol Ther.  2016 Sep;24(5):510-516. 10.4062/biomolther.2015.194.

Isoegomaketone Upregulates Heme Oxygenase-1 in RAW264.7 Cells via ROS/p38 MAPK/Nrf2 Pathway

• Jin CH
• So YK
• Han SN
• Kim JB

• KMID: 2351675
• DOI: http://doi.org/10.4062/biomolther.2015.194

Abstract

Isoegomaketone (IK) was isolated from Perilla frutescens, which has been widely used as a food in Asian cuisine, and evaluated for its biological activity. We have already confirmed that IK induced the HO-1 expression via Nrf2 activation in RAW264.7 cells. In this study, we investigated the effect of IK on the mechanism of HO-1 expression. IK upregulated HO-1 mRNA and protein expression in a dose dependent manner. The level of HO-1 mRNA peaked at 4 h after 15 μM IK treatment. To investigate the mechanisms of HO-1 expression modulation by IK, we used pharmacological inhibitors for the protein kinase C (PKC) family, PI3K, and p38 MAPK. IK-induced HO-1 mRNA expression was only suppressed by SB203580, a specific inhibitor of p38 MAPK. ROS scavengers (N-acetyl-L-cysteine, NAC, and glutathione, GSH) also blocked the IK-induced ROS production and HO-1 expression. Furthermore, both NAC and SB203580 suppressed the IK-induced Nrf2 activation. In addition, ROS scavengers suppressed other oxidative enzymes such as catalase (CAT), glutathione S-transferase (GST), and NADH quinone oxidoreductase (NQO-1) in IK-treated RAW264.7 cells. Taken together, it can be concluded that IK induced the HO-1 expression through the ROS/p38 MAPK/ Nrf2 pathway in RAW264.7 cells.

Keyword

Isoegomaketone; Heme oxygenase-1; p38 MAPK; ROS scavenger

MeSH Terms

Asian Continental Ancestry Group
Catalase
Glutathione
Glutathione Transferase
Heme Oxygenase-1*
Heme*
Humans
NAD
p38 Mitogen-Activated Protein Kinases
Perilla frutescens
Protein Kinase C
RNA, Messenger
Catalase
Glutathione
Glutathione Transferase
Heme
Heme Oxygenase-1
NAD
Protein Kinase C
RNA, Messenger
p38 Mitogen-Activated Protein Kinases