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이용섭(Yong Sup Lee),류종훈(Jong Hoon Ryu),박동현(Dong Hyun Park),윤용돈(Yong Don Yun),남승옥(Seung Ok Nam) 大韓藥學會 2011 약학회지 Vol.55 No.6
Alzheimer's disease (AD), one of the most common forms of dementia, is a progressive neurodegenerative disorder symptomatically characterized by the decline in memory and cognitive abilities. To date, the successful therapeutic strategy to treat AD is to maintain the levels of acetylcholine (ACh) by inhibiting acetylcholinesterase (AChE) to lead five drugs in clinical use. In this study, several coumarin derivatives were designed based on the lead structure of scopoletin and evaluated for their AChE inhibitory activities.
Bis(pyronyl)acrylic Acid Ester 유도체의 합성
남승옥,김동한,이용섭,Nam, Seung-Ok,Kim, Dong-Han,Lee, Yong-Sup 대한약학회 2009 약학회지 Vol.53 No.2
Dicaffeoyltartaric acid has a structural feature consisting of two caffeic acid units separated by tartaric acid linker and has been found to be a potent inhibitor of HIV-1 integrase and an antioxidant. In this study, bis(pyronyl)acrylic acid esters joined through a 5-membered ring as a linker were synthesized as the analogues of dicaffeoyltartaric acid.
면역결핍바이러스 인테그라제 억제제로서 Baicalein과 Baicalin
이민전(Min Jun Lee),김미라(Mi Ra Kim),이용섭(Yong Sup Lee),신차균(Cha Gyun Shin) 대한약학회 2003 약학회지 Vol.47 No.1
Baicalein and baicalin are flavonoid compounds isolated from medicinal herb Scutellaria baicalensis Georgi (Labiatae) and have been known to possess antiviral activities. In the present study; we investigated the in vitro effects of baicalein and baicalin on the three distinctive enzymatic activities of the human immunodeficlency virus type-1 (HIV-1) integrase - endonucleolytic, integration, and disintegration activities. Both compounds inhibited the three enzymatic activities in a dose-dependent manner The 50% inhibitory concentrations of baicalein and baicalin for endonucleolytic activities of HIV-1 integrase were 4.4 +/- 3.3 and 25.9 +/- 4.0μM, respectivel. In general, baicalein exhibited nearly 6- to 10-fold stronger inhibition than baicalin for the three enzymatic activities. These data demonstrate that baicalein or baicalin can be used as a leading compound to develop anti-AIDS chemotherapeutic agents targeting to the HIV-1 integrase.
생쥐의 B 세포에서 anti-CD40과 rIL-4로 유도된 싸이토카인 생산에 대한 자오가의 효과
성일창 ( Il Chang Sung ),김형환 ( Hyung Hwan Kim ),안덕균 ( Duk Kyun Ahn ),이용섭 ( Yong Sup Lee ),서영배 ( Young Bae Seo ),최호영 ( Ho Young Choi ) 대한본초학회 2003 大韓本草學會誌 Vol.18 No.2
N/A Objectives : In order to study the anti-allegy effect of water extract of Acanthopanacis senticosi Radix (ASR) on the B-cells from healthy Balblc mice. Methods : The cytotoxicity of ASR was measured with the murine normal lung fibroblast cells by modified SRB assay. And the murine splenic B-cells was stimulated with anti-CD40 mAb and rIL4. The various cytokines related with allergy were measured by flow-cytometry and by RT-PCR with electophoresis. Results : The anti-allegy effects to ASR were identified and observed. The cytotoxicity of ASR on mouse lung fibroblast cells showed no significant activities. ASR had inhibitory effect on CD23+, CD69+, and IgE expression by ASR with anti-CD40 mAb plus rL-4-stimulated murine splenic B-cells. ASR had inhibitory effect on cytokines (E-lb, IL-4, IL-6, IL-10, TNF-a, TGF-81, INF-Y) and transcript expression and IgE production by ASR with anti-CD40 mAb plus rIL-4-stimulated murine splenic B-cells. Conclusion : We concluded that ASR showed anti-allegy effect on murine splenic B-cells.