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2018 ; 51
(6
): 308-313
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Anti-inflammatory effects of a novel compound, MPQP, through the inhibition of
IRAK1 signaling pathways in LPS-stimulated RAW 264 7 macrophages
#MMPMID29804558
Kim BR
; Cho YC
; Cho S
BMB Rep
2018[Jun]; 51
(6
): 308-313
PMID29804558
show ga
Small-molecule inhibitors are widely used to treat a variety of inflammatory
diseases. In this study, we found a novel antiinflammatory compound,
1-[(2R,4S)-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?, and tumor necrosis factor-? (TNF-?). 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-terminal kinase (JNK), the inhibitor of ?B?
(I?B?), and their upstream kinases, I?B kinase (IKK) ?/?, mitogen-activated
protein kinase kinase (MKK) 3/6, and MKK4. Furthermore, the expression of IL-1
receptor-associated kinase 1 (IRAK1) that regulates NF-?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. [BMB Reports 2018; 51(6): 308-313].