title: [The protective effects of ginsenoside RG1 and Rb1 against damage of HaCaT cells by ultraviolet B].
abstract: OBJECTIVE
  To investigate the survival rate and the level of HaCaT cells damage with ultraviolet B (UVB) radiation at various doses, and observe the protective effects of ginsenoside Rg1 and Rb1 in vitro.
  
  
  METHODS
  MTT assay was employed to analyze the cell survival rate after UVB radiation of 30, 60, 90 and 120 mJ x cm(-2). The damage of nucleolus and the protective effects of ginsenoside Rg1 and Rb1 were scanned by Hoechst 33258 staining and single cell gel electrophoresis assay (SCGE).
  
  
  RESULTS
  It was found that the cell survival rate decreased gradually and the damage of nucleolus aggravated as the radiation dose increased from 30 mJ x cm(-2) to 120 mJ x cm(-2). At the dose of 20 microg x mL(1-), obvious protective effect of ginsenoside Rg1 and Rb1 can be observed against UVB radiation-induced HaCaT cells growth inhibition and nucleolus damage.
  
  
  CONCLUSIONS
  UVB radiation inhibits HaCaT human keratinocytes growth and ginsenoside Rg1 and Rb1 can relief the damage.
authors.affiliation: Department of Pharmacology, West China School of Preclinical and Forensic Medicine, Sichuan University, Chengdu 610041, China.
authors.forename: Jun-lin
authors.initials: JL
authors.lastname: Cheng
authors.forename: Li-ming
authors.initials: LM
authors.lastname: Zhou
authors.forename: Xiao-lin
authors.initials: XL
authors.lastname: Guan
authors.forename: Xiang-hong
authors.initials: XH
authors.lastname: Kuang
authors.forename: Ling
authors.initials: L
authors.lastname: Zhu
mesh_terms: D017209:Apoptosis / Q000187:drug effects* / Q000528:radiation effects; D002460:Cell Line; D002470:Cell Survival / Q000187:drug effects / Q000528:radiation effects; D004249:DNA Damage / Q000187:drug effects / Q000528:radiation effects; D004307:Dose-Response Relationship, Radiation; D036145:Ginsenosides / Q000302:isolation & purification / Q000494:pharmacology*; D006801:Humans; D015603:Keratinocytes / Q000166:cytology / Q000187:drug effects* / Q000528:radiation effects; D005894:Panax / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry; D020011:Protective Agents / Q000302:isolation & purification / Q000494:pharmacology; D014466:Ultraviolet Rays / Q000009:adverse effects
chemical_list: D036145:Ginsenosides; D020011:Protective Agents; C442759:ginsenoside Rb1; C035054:ginsenoside Rg1