The Inhibitory Mechanisms Study of 5,6,4′-Trihydroxy-7,3′-Dimethoxyflavone against the LPS-Induced Macrophage Inflammatory Responses through the Antioxidant Ability

• Main Authors: Shih-Hao Wang, Chia-Hua Liang, Fong-Pin Liang, Hsiou-Yu Ding, Shiuan-Pey Lin, Guan-Jhong Huang, Wen-Chuan Lin, Shin-Hun Juang
• Format: Article
• Language: English
• Published: MDPI AG 2016-01-01
• Series: Molecules
• Subjects: Anisomeles ovata; 5,6,4′-trihydroxy-7,3′-dimethoxyflavone; anti-inflammatory; anti-oxidant; reactive oxygen species
• Online Access: http://www.mdpi.com/1420-3049/21/2/136

The whole plant of Anisomeles ovata has been widely used in Taiwan for treating inflammation-related skin and liver diseases, however, the detailed pharmacology mechanisms have yet to be elucidated. In the present study, one of the major components, 5,6,4′-trihydroxy-7,3′-dimethoxyflavone (5-TDMF), was purified from a methanol extract of Anisomeles ovata. A pharmacological study of this compound suggests that 5-TDMF possesses potent free radical scavenging activity both in vitro and ex vivo. Furthermore, 5-TDMF reduces nitric oxide and pro-inflammatory cytokine production in LPC-treated RAW 264.7 cells through the attenuation of nitric oxide synthase and cyclooxygenase-2. Additional experiments suggest that of 5-TDMF interferes with nuclear factor-κB translocation and mitogen-activated protein kinase pathways. These results identify 5-TDMF as an anti-oxidant and anti-inflammatory compound, explain the pharmacologic function of Anisomeles ovata and suggest its great potential as a new anti-inflammatory remedy.