title: A flavonoid from medicinal plants blocks hepatitis B virus-e antigen secretion in HBV-infected hepatocytes.
abstract: A flavonoid molecule that showed a unique anti-HBV function was isolated from Phyllanthus urinaria. The molecular formula was determined as C14H6O8 based on FAM-MS analysis and the structure was determined by NMR. The identified flavonoid molecule, ellagic acid, showed unique anti-HBV functions. Ellagic acid did not inhibit either HBV polymerase activity, HBV replication or block HBsAg secretion. Rather, ellagic acid blocks effectively HBeAg secretion in HepG2 2.2.15 cells (IC50=0.07 microg/ml). Since HBeAg is involved in immune tolerance during HBV infection, ellagic acid, a newly identified functional anti-HBV compound, may be a new candidate therapeutic against immune tolerance in HBV-infected individuals.
authors.affiliation: Liver Cell Signal Transduction Laboratory, Bioscience Research Division, Korea Research Institute of Bioscience and Biotechnology, Taejon 305-606, Republic of Korea.
authors.forename: Min Soo
authors.initials: MS
authors.lastname: Shin
authors.forename: Eun Hwa
authors.initials: EH
authors.lastname: Kang
authors.forename: Young Ik
authors.initials: YI
authors.lastname: Lee
mesh_terms: D000998:Antiviral Agents / Q000494:pharmacology*; D002460:Cell Line; D004610:Ellagic Acid / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D015684:Gene Products, pol / Q000032:analysis; D006514:Hepatitis B Surface Antigens / Q000032:analysis; D006513:Hepatitis B e Antigens / Q000032:analysis*; D006515:Hepatitis B virus / Q000187:drug effects* / Q000502:physiology; D022781:Hepatocytes / Q000821:virology*; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D015394:Molecular Structure; D029803:Phyllanthus / Q000737:chemistry*; D010936:Plant Extracts / Q000302:isolation & purification / Q000494:pharmacology*; D014779:Virus Replication / Q000187:drug effects
chemical_list: D000998:Antiviral Agents; D015684:Gene Products, pol; D006514:Hepatitis B Surface Antigens; D006513:Hepatitis B e Antigens; C066027:P protein, Hepatitis B virus; D010936:Plant Extracts; D004610:Ellagic Acid