Andrographolide suppresses TRIF-dependent signaling of toll-like receptors by targeting TBK1
- Authors
- Kim, Ah-Yeon; Shim, Hyun-Jin; Shin, Hyeon-Myeong; Lee, Yoo Jung; Nam, Hyeonjeong; Kim, Su Yeon; Youn, Hyung-Sun
- Issue Date
- Apr-2018
- Publisher
- Elsevier BV
- Keywords
- Toll-like receptors; Andrographolide; Inflammation; TRIF; TBK1
- Citation
- International Immunopharmacology, v.57, pp 172 - 180
- Pages
- 9
- Journal Title
- International Immunopharmacology
- Volume
- 57
- Start Page
- 172
- End Page
- 180
- URI
- https://scholarworks.bwise.kr/sch/handle/2021.sw.sch/6078
- DOI
- 10.1016/j.intimp.2018.02.019
- ISSN
- 1567-5769
1878-1705
- Abstract
- Toll-like receptors (TLRs) play a crucial role in danger recognition and induction of innate immune response against bacterial and viral infections. The TLR adaptor molecule, toll-interleuidn-1 receptor domain-containing adapter inducing interferon-beta (TRW), facilitates TLR3 and TLR4 signaling, leading to the activation of the transcription factor, NF-kappa B and interferon regulatory factor 3 (IRF3). Andrographolide, the active component of Andivgraphis paniculata, exerts anti-inflammatory effects; however, the principal molecular mechanisms remain unclear. The objective of this study was to investigate the role of andrographolide in TLR signaling pathways. Andrographolide suppressed NF-kappa B activation as well as COX-2 expression induced by TLR3 or TLR4 agonists. Andrographolide also suppressed the activation of IRF3 and the expression of interferon inducible protein-10 (IP-10) induced by TLR3 or TLR4 agonists. Andrographolide attenuated ligand-independent activation of IRF3 following overexpression of TRIP, TBK1, or IRF3. Furthermore, andrographolide inhibited TBK1 ldnase activity in vitro. These results indicate that andrographolide modulates the TRIP-dependent pathway of TLR5 by targeting TBK1 and represents a potential new anti-inflammatory candidate.
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Collections - College of Medical Sciences > Department of Biomedical Laboratory Science > 1. Journal Articles
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