title: ent-Epiafzelechin-(4alpha-->8)-epiafzelechin extracted from Cassia javanica inhibits herpes simplex virus type 2 replication.
abstract: Herpes simplex virus (HSV) is a ubiquitous organism that causes infections in human populations throughout the world. It causes a variety of diseases ranging in severity from mild to life-threatening. In this study, ent-epiafzelechin-(4alpha-->8)-epiafzelechin (EEE) extracted from the fresh leaves of Cassia javanica L. agnes de Wit (Leguminosae) was investigated for its in vitro anti-HSV-2 activity using XTT and plaque reduction assays. Results showed that EEE inhibited HSV-2 replication in a dose-dependent manner. The IC50 value was 83.8 +/- 10.9 and 166.8 +/- 12.9 microM for XTT and plaque reduction assays, respectively. EEE did not affect the viability and the proliferation of cells at antiviral concentrations. Mechanistic studies demonstrated that EEE prevented HSV-2 from penetrating the cell and also interfered with HSV-2 replication at the late stage of its life cycle. It also disturbed virus attachment but the inhibitory effect was minor. In summary, the conclusion of this study was that EEE exhibits various modes of action in suppressing HSV-2 multiplication.
authors.affiliation: Department of Cosmetic Applications & Management, Tung Fang Institute of Technology, 829 Kaohsiung County, Taiwan.
authors.forename: Hua-Yew
authors.initials: HY
authors.lastname: Cheng
authors.affiliation: Graduate Institute of Pharmaceutical Sciences, College of Pharmacy, Kaohsiung Medical University, 807 Kaohsiung, Taiwan.
authors.forename: Chien-Min
authors.initials: CM
authors.lastname: Yang
authors.affiliation: General Education Center, Chungtai Institute of Health Sciences and Technology, Taichung, Taiwan.
authors.forename: Ta-Chen
authors.initials: TC
authors.lastname: Lin
authors.affiliation: Department of Food Science and Technology, Tajen Institute of Technology, 907 Ping-Tung, Taiwan.
authors.forename: Den-En
authors.initials: DE
authors.lastname: Shieh
authors.affiliation: Graduate Institute of Pharmaceutical Sciences, College of Pharmacy, Kaohsiung Medical University, 807 Kaohsiung, Taiwan.
authors.forename: Chun-Ching
authors.initials: CC
authors.lastname: Lin
mesh_terms: D000818:Animals; D000998:Antiviral Agents / Q000737:chemistry / Q000494:pharmacology*; D002366:Cassia / Q000737:chemistry*; D002392:Catechin / Q000031:analogs & derivatives* / Q000737:chemistry / Q000494:pharmacology; D002522:Chlorocebus aethiops; D004305:Dose-Response Relationship, Drug; D004365:Drugs, Chinese Herbal / Q000737:chemistry; D018258:Herpesvirus 2, Human / Q000187:drug effects* / Q000502:physiology; D018515:Plant Leaves / Q000737:chemistry; D014709:Vero Cells; D014779:Virus Replication / Q000187:drug effects
chemical_list: D000998:Antiviral Agents; D004365:Drugs, Chinese Herbal; C508495:ent-epiafzelechin-(4alpha-8)epiafzelechin; D002392:Catechin