title: [Replication and transfection of hepatitis B virus DNA into primary duck hepatocytes].
abstract: OBJECTIVE
  By studying the possibility of obtaining expression of human hepatitis B virus (HBV) genes and production in normal liver cells from heterologous species like normal primary duck hepatocytes (PDH), to investigate the species-specificity of HBV infection and replication.
  
  
  METHODS
  Two days after transfecting the complete HBV genome into PDH by electroporation (transfected group), HBsAg and HBeAg in the supernatants and lysates of PDH were measured by the IMX system. Meanwhile, replication of HBV in PDH was analyzed by Southern blotting and dot blotting procedures. PDH was electroporated as control.
  
  
  RESULTS
  HBsAg in the lysate of transfected group was 9.10 (P/N values, positive?2.1), HBeAg was 1.0 (negative?2.1), both were negative in the supernatants of transfected group. dot blotting revealed that transfected group was strongly positive, whereas the control group was negative. Southern blot analysis of intracellular total DNA indicated that there were relaxed circular (RC), covalently closed circular (CCC) and single-stranded (SS) HBV DNA replicative intermediates in the transfected group, and there was no integrated HBV DNA in the cellular genome. Control groups were negative.
  
  
  CONCLUSIONS
  Replication of HBV can occur in hepatocytes from nonmammalian species, which strongly supports the idea that replication of HBV has no critical species-specificity, and yet it depends on the endoenvironment of hepatocyte.
authors.affiliation: Institute for Viral Hepatitis, Chongqing University of Medical Sciences, Chongqing 400010, China.
authors.forename: Yunqing
authors.initials: Y
authors.lastname: Yao
authors.forename: Ailong
authors.initials: A
authors.lastname: Huang
authors.forename: Ni
authors.initials: N
authors.lastname: Tang
authors.forename: Bo
authors.initials: B
authors.lastname: Wang
authors.forename: Dingfeng
authors.initials: D
authors.lastname: Zhang
mesh_terms: D000818:Animals; D002478:Cells, Cultured; D004261:DNA Replication / Q000502:physiology*; D004279:DNA, Viral / Q000096:biosynthesis*; D004195:Disease Models, Animal; D004372:Ducks; D018274:Electroporation; D006514:Hepatitis B Surface Antigens / Q000032:analysis; D006513:Hepatitis B e Antigens / Q000032:analysis; D006515:Hepatitis B virus / Q000235:genetics* / Q000502:physiology; D022781:Hepatocytes / Q000378:metabolism / Q000821:virology*; D006801:Humans; D013045:Species Specificity; D014162:Transfection; D014779:Virus Replication
chemical_list: D004279:DNA, Viral; D006514:Hepatitis B Surface Antigens; D006513:Hepatitis B e Antigens