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Discovery of Tricyclic Pyranochromenone as Novel Bruton's Tyrosine Kinase Inhibitors with In Vivo Antirheumatic Activity

Authors
Cho, HyewonLee, EunKwon, Hye AhSeul, LeeJeon, Hui-JeonYu, Ji HoonRyu, Jae-HaJeon, Raok
Issue Date
Nov-2020
Publisher
MDPI
Citation
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES, v.21, no.21, pp.1 - 15
Journal Title
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
Volume
21
Number
21
Start Page
1
End Page
15
URI
https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/1073
DOI
10.3390/ijms21217919
ISSN
1661-6596
Abstract
Bruton's tyrosine kinase (BTK) is an attractive target for treating patients with B cell malignancies and autoimmune diseases. Many BTK inhibitors have been identified; however, like other kinase inhibitors, they lack diversity in their core structures. Therefore, it is important to secure a novel scaffold that occupies the adenine-binding site of BTK. We screened an in-house library of natural products and their analogs via a biochemical assay to identify a novel scaffold for targeting BTK. A pyranochromenone scaffold, derived from a natural active component decursin, was found to be effective at targeting BTK and was selected for further optimization. A series of pyranochromenone analogs was synthesized through the modification of pyranochromenone at the C7 position. Pyranochromenone compounds with an electrophilic warhead exhibited promising BTK inhibitory activity, with IC50 values in the range of 0.5-0.9 mu M. A docking study of the representative compound 8 provided a reasonable explanation for compound activity. Compound 8 demonstrated good selectivity over other associated kinases and decreased the production of proinflammatory cytokines in THP cells. Moreover, compound 8 presented significant in vivo efficacy in a murine model of collagen-induced arthritis.
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