title: Cytotoxicity and antibacterial activity of Lindera strychnifolia essential oils and extracts.
abstract: OBJECTIVE
  Lindera strychnifolia (LS) is widely used in traditional Chinese medicine. In the present study, we investigated cytotoxicity and antibacterial activity of essential oils and various fractions of ethanol extract of LS to explore the active components of LS and their pharmacological effects.
  
  
  METHODS
  The in vitro cytotoxicities of essential oils and various solvent fractions of LS on three human cancer cell lines (A549, HeLa and Hep G2) and a non-cancerous cell line (HUVEC) were examined using a modified MTT assay. And by using agar disc diffusion and broth microdilution methods, the antibacterial activity of these samples was evaluated against 10 bacteria including 5 clinically isolated strains. The compositions of the essential oils from the leaves and roots of LS were also analyzed by GC and GC-MS.
  
  
  RESULTS
  The leaf oil showed the strongest cytotoxicity on the cancer cell lines tested with the IC50 values ranged from 22 to 24 microg/ml after 24 h of treatment. The most sensitive microbial strain to all the samples was Staphylococcus aureus ATCC 25923.
  
  
  CONCLUSIONS
  Our results showed that the essential oils of LS exhibited greater cytotoxicity and antibacterial activity than the solvent fractions of ethanol extract of LS.
authors.affiliation: State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan 430072, China.
authors.forename: Runwei
authors.initials: R
authors.lastname: Yan
authors.forename: Yang
authors.initials: Y
authors.lastname: Yang
authors.forename: Yingying
authors.initials: Y
authors.lastname: Zeng
authors.forename: Guolin
authors.initials: G
authors.lastname: Zou
mesh_terms: D000972:Antineoplastic Agents, Phytogenic / Q000494:pharmacology* / Q000627:therapeutic use; D001419:Bacteria / Q000187:drug effects*; D045744:Cell Line, Tumor; D042783:Endothelial Cells / Q000187:drug effects; D006801:Humans; D027443:Lindera; D008826:Microbial Sensitivity Tests; D009369:Neoplasms / Q000188:drug therapy*; D009822:Oils, Volatile / Q000737:chemistry / Q000494:pharmacology* / Q000627:therapeutic use; D008517:Phytotherapy; D010936:Plant Extracts / Q000737:chemistry / Q000494:pharmacology* / Q000627:therapeutic use; D018515:Plant Leaves; D018517:Plant Roots; D012717:Sesquiterpenes / Q000737:chemistry / Q000494:pharmacology* / Q000627:therapeutic use
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D009822:Oils, Volatile; D010936:Plant Extracts; D012717:Sesquiterpenes