Anti-inflammatory effects of a novel compound, MPQP, through the inhibition of IRAK1 signaling pathways in LPS-stimulated RAW 264.7 macrophages
- Authors
- Kim, Ba Reum; Cho, Young-Chang; Cho, Sayeon
- Issue Date
- 2018
- Publisher
- KOREAN SOCIETY BIOCHEMISTRY & MOLECULAR BIOLOGY
- Keywords
- Cyclooxygenase 2; IL-1 receptor-associated kinase 1; Inflammation; Inflammatory cytokine; 1-[(2R,4S)-2-methyl-4-(phenylamino)-1,2,3,4-tetrahydroquinolin-l-yl]prop -2-en-1-one
- Citation
- BMB REPORTS, v.51, no.6, pp 308 - 313
- Pages
- 6
- Journal Title
- BMB REPORTS
- Volume
- 51
- Number
- 6
- Start Page
- 308
- End Page
- 313
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/1514
- DOI
- 10.5483/BMBRep.2018.51.6.064
- ISSN
- 1976-6696
1976-670X
- Abstract
- Small-molecule inhibitors are widely used to treat a variety of inflammatory diseases. In this study, we found a novel anti-inflammatory compound, 1-[(2R,45)-2-methyl-4-(phenylamino)-1,2,3,4-tetrahydroquinolin-1-yl]prop-2-en-1-one (MPQP). It showed strong anti-inflammatory effects in lipopolysaccharide (LPS)-stimulated RAW 264.7 macrophages. These effects were exerted through the inhibition of the production of NO and pro-inflammatory cytokines, such as interleukin (IL)-6, IL-1 beta, and tumor necrosis factor-alpha (TNF-alpha). Furthermore, MPQP decreased the expression levels of inducible NO synthase (iNOS) and cyclooxygenase 2 (COX-2). Additionally, it mediated the inhibition of the phosphorylation of p38, c-Jun N-terrninal kinase (JNK), the inhibitor of kappa B alpha (I kappa B alpha), and their upstream kinases, I kappa B kinase (IKK) alpha/beta, mitogen-activated protein kinase kinase (MKK) 3/6, and MKK4. Furthermore, the expression of IL-1 receptor-associated kinase 1 (IRAK1) that regulates NF-kappa B, p38, and the JNK signaling pathways, was also increased by MPQP. These results indicate that MPQP regulates the IRAK1-mediated inflammatory signaling pathways by targeting IRAK1 or its upstream factors.
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