Anti-inflammatory effects of 4-arylcoumarins in LPS-induced murine macrophage RAW 264.7 cells

• Main Authors: Thongchai Taechowisan, Chunhua Lu, Yuemao Shen, Saisamorn Lumyong
• Format: Journal
• Published: 2018
• Subjects: Biochemistry, Genetics and Molecular Biology; Medicine; Pharmacology, Toxicology and Pharmaceutics
• Online Access: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=33750848692&origin=inward; http://cmuir.cmu.ac.th/jspui/handle/6653943832/61505
• Institution: Chiang Mai University

This research was undertaken to find the in vitro inflammatory action of 5,7-dimethyloxy-4-p-methoxylphenylcoumarin and 5,7-dimethoxy-4-phenylcoumarin produced by Streptomyces aureofaciens CMUAc130. We investigated the effects of 5,7-dimethyloxy-4-p-methoxylphenylcoumarin and 5,7-dimethoxy-4-phenylcoumarin not only on the formation of NO, prostaglandin E2(PGE2), and tumor necrosis factor-α (TNF-α) but also on inducible nitric oxide synthase and cyclooxygenase-2 (COX-2) in lipopolysaccharide (LPS)-induced murine macrophage RAW 264.7 cells. The data obtained were consistent with the modulation of iNOS enzyme expression. A similar fashion was also observed when LPS-induced PGE2release and COX-2 expression were tested. The significant inhibitory effects were shown in concentration-dependent manners. In addition, 5,7-dimethyloxy-4-p-methoxylphenylcoumarin and 5,7-dimethoxy-4- phenylcoumarin also mildly but significantly reduced the formation of TNF-α. These findings support the application of 5,7-dimethyloxy-4-p- methoxylphenylcoumarin and 5,7-dimethoxy-4-phenylcoumarin as anti-inflammatory agents. © 2006 Informa Healthcare.