title: Effect of berberine on interleukin 8 and monocyte chemotactic protein 1 expression in a human retinal pigment epithelial cell line.
abstract: OBJECTIVE
  The aims of this study were to examine the effects of berberine, an alkaloid isolated from some medicinal herbs, on interleukin 8 (IL-8) and monocyte chemotactic protein 1 (MCP-1) expression in a human retinal pigment epithelial cell line (ARPE-19) stimulated with interleukin 1beta (IL-1beta) or tumor necrosis factor alpha (TNF-alpha).
  
  
  METHODS
  ARPE-19 cells were cultured to confluence. Berberine and IL-1beta or TNF-alpha were added to the medium. IL-8 mRNA and MCP-1 mRNA were measured by semiquantitative reverse-transcription polymerase chain reaction and real-time polymerase chain reaction. IL-8 and MCP-1 protein concentrations in the media were measured using enzyme-linked immunosorbent assay.
  
  
  RESULTS
  Berberine dose-dependently inhibited IL-8 mRNA and MCP-1 mRNA expression of the cells and protein levels in the media stimulated with IL-1beta or TNF-alpha.
  
  
  CONCLUSIONS
  These findings indicate that berberine dose-dependently inhibited the expression of IL-8 and MCP-1 induced by IL-1beta or TNF-alpha.
authors.affiliation: Department of Ophthalmology, Toyama Medical and Pharmaceutical University, Toyama, Japan. ophthal@ms.toyama-mpu.ac.jp
authors.forename: Hu-Shan
authors.initials: HS
authors.lastname: Cui
authors.forename: Seiji
authors.initials: S
authors.lastname: Hayasaka
authors.forename: Xue-Yun
authors.initials: XY
authors.lastname: Zhang
authors.forename: Yoriko
authors.initials: Y
authors.lastname: Hayasaka
authors.forename: Zai-Long
authors.initials: ZL
authors.lastname: Chi
authors.forename: Lian-Shun
authors.initials: LS
authors.lastname: Zheng
mesh_terms: D001599:Berberine / Q000494:pharmacology*; D002460:Cell Line; D018932:Chemokine CCL2 / Q000235:genetics* / Q000378:metabolism; D004305:Dose-Response Relationship, Drug; D004797:Enzyme-Linked Immunosorbent Assay; D015870:Gene Expression / Q000187:drug effects; D006801:Humans; D007375:Interleukin-1 / Q000494:pharmacology; D016209:Interleukin-8 / Q000235:genetics* / Q000378:metabolism; D010857:Pigment Epithelium of Eye / Q000187:drug effects* / Q000378:metabolism; D012313:RNA / Q000302:isolation & purification; D012333:RNA, Messenger / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology
chemical_list: C111835:CCL2 protein, human; D018932:Chemokine CCL2; D007375:Interleukin-1; D016209:Interleukin-8; D012333:RNA, Messenger; D014409:Tumor Necrosis Factor-alpha; D001599:Berberine; D012313:RNA