[논문]Evaluation of Selective COX-2 Inhibition and In Silico Study of Kuwanon Derivatives Isolated from Morus alba

Baek, Seung-Hwa; Hwang, Sungbo; Park, Tamina; Kwon, Yoon-Ju; Cho, Myounglae; Park, Daeui

doi:10.3390/ijms22073659

[해외논문] Evaluation of Selective COX-2 Inhibition and In Silico Study of Kuwanon Derivatives Isolated from Morus alba 원문보기

International journal of molecular sciences, v.22 no.7, 2021년, pp.3659 -

Baek, Seung-Hwa (Department of Predictive Toxicology, Korea Institute of Toxicology, Daejeon 34114, Korea) , Hwang, Sungbo (seunghwa.beak@kitox.re.kr (S.-H.B.)) , Park, Tamina (sungbo.hwang@kitox.re.kr (S.H.)) , Kwon, Yoon-Ju (tamina.park@kitox.re.kr (T.P.)) , Cho, Myounglae (Department of Predictive Toxicology, Korea Institute of Toxicology, Daejeon 34114, Korea) , Park, Daeui (seunghwa.beak@kitox.re.kr (S.-H.B.))

Abstract ▼ AI-Helper

Six kuwanon derivatives (A/B/C/E/H/J) extracted from the roots of Morus alba L. were evaluated to determine their cyclooxygenase (COX)-1 and 2 inhibitory effects. Cyclooxygenase (COX) is known as the target enzyme of nonsteroidal anti-inflammatory drugs (NSAIDs), which are the most widely used therapeutic agents for pain and inflammation. Among six kuwanon derivatives, kuwanon A showed selective COX-2 inhibitory activity, almost equivalent to that of celecoxib, a known COX inhibitor. Kuwanon A showed high COX-2 inhibitory activity (IC50 = 14 μM) and a selectivity index (SI) range of >7.1, comparable to celecoxib (SI > 6.3). To understand the mechanisms underlying this effect, we performed docking simulations, fragment molecular orbital (FMO) calculations, and pair interaction energy decomposition analysis (PIEDA) at the quantum-mechanical level. As a result, kuwanon A had the strongest interaction with Arg120 and Tyr355 at the gate of the COX active site (−7.044 kcal/mol) and with Val89 in the membrane-binding domain (−6.599 kcal/mol). In addition, kuwanon A closely bound to Val89, His90, and Ser119, which are residues at the entrance and exit routes of the COX active site (4.329 Å). FMO calculations and PIEDA well supported the COX-2 selective inhibitory action of kuwanon A. It showed that the simulation and modeling results and experimental evidence were consistent.

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