title: Lignan, sesquilignans and dilignans, novel HIV-1 protease and cytopathic effect inhibitors purified from the rhizomes of Saururus chinensis.
abstract: Five lignans were isolated from the ethyl acetate extracts of Saururus chinensis rhizomes and evaluated for anti-HIV-1 activity. Their structures were elucidated as two dilignans, manassantin A (1), manassantin B (2), two sesquilignans, saucerneol B (3) and saucerneol C (4), and a new lignan, saururin B (5) by spectroscopic analysis. Of these components, manassantin A (1) and saururin B (5) showed dose-dependent inhibitory activities on HIV-1 protease with IC(50) values of 38.9 and 5.6 microM. In addition, manassantins A (1), B (2) and saucerneol B (3) inhibited HIV-1-induced cytopathic effects in a human T lymphoblastoid cell line with IC(100) values of 1.0, 1.0 and 0.2 microM, respectively. Of these active constituents, saucerneol B (3) showed the most potent and selective anti-HIV-1 activity (IC(100) of 0.2 microM, CC(0) of >125.0 microM, and SI of >520.8).
authors.affiliation: College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, 599 Kwanangno, Kwanak-gu, Seoul 151-742, Republic of Korea. jslee103@snu.ac.kr
authors.forename: Jisuk
authors.initials: J
authors.lastname: Lee
authors.forename: Myoung Sook
authors.initials: MS
authors.lastname: Huh
authors.forename: Young Choong
authors.initials: YC
authors.lastname: Kim
authors.forename: Masao
authors.initials: M
authors.lastname: Hattori
authors.forename: Toru
authors.initials: T
authors.lastname: Otake
mesh_terms: D002460:Cell Line; D003588:Cytopathogenic Effect, Viral / Q000187:drug effects; D004305:Dose-Response Relationship, Drug; D017320:HIV Protease Inhibitors / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D015497:HIV-1 / Q000187:drug effects*; D006801:Humans; D020128:Inhibitory Concentration 50; D017705:Lignans / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D015394:Molecular Structure; D027343:Rhizome / Q000737:chemistry*; D032134:Saururaceae / Q000737:chemistry*; D013057:Spectrum Analysis; D013601:T-Lymphocytes / Q000821:virology
chemical_list: D017320:HIV Protease Inhibitors; D017705:Lignans