title: [Poteintation of vincristine-induced apoptosis by tetrandrine, neferine and dauricine in the human mammary MCF-7 multidrug-resistant cells].
abstract: OBJECTIVE
  To investigate the poteintation of vincristine-induecd apoptosis by tetrandrine, neferine and dauricine isolated from Chinese medicinal plants in the human mammary MCF-7 multidrug resistant cells.
  
  
  METHODS
  The apoptotic cells were detected by fluorescent staining of a combination of Hoechst 33342 and propidium iodide (PI), flow cytometry and agarose electrophoresis.
  
  
  RESULTS
  The apoptotic cells induced by vincristine alone accounted for about 10% of all the cancer cells, while the percentage of apoptotic cells induced by a combination of vincristine with tetrandrine, neferine, or dauricine was found to be significantly higher than that by vincristine alone, and their reversal effects were positively correlated with the drug concentration and the exposure time. In addition, tetrandrine was shown to be the most potent in the reversal efficacy among the three compounds to be tested for apoptosis in vitro.
  
  
  CONCLUSIONS
  Tetrandrine, neferine and dauricine showed obvious potenitiation of vincristine-induced apoptosis in the human mammary MCF-7 multidrug-resistant cells.
authors.affiliation: Institute of Chinese Materia Medica, China Academy of Traditional Chinese Medicine, Beijing 100700, China. yezuguang@sohu.com
authors.forename: Z G
authors.initials: ZG
authors.lastname: Ye
authors.forename: J H
authors.initials: JH
authors.lastname: Wang
authors.forename: A X
authors.initials: AX
authors.lastname: Sun
authors.forename: A H
authors.initials: AH
authors.lastname: Liang
authors.forename: B Y
authors.initials: BY
authors.lastname: Xue
authors.forename: C Y
authors.initials: CY
authors.lastname: Li
authors.forename: L
authors.initials: L
authors.lastname: Wang
mesh_terms: D000470:Alkaloids / Q000494:pharmacology*; D000972:Antineoplastic Agents, Phytogenic / Q000494:pharmacology*; D017209:Apoptosis / Q000187:drug effects*; D044182:Benzylisoquinolines; D001943:Breast Neoplasms / Q000473:pathology*; D018432:Drug Resistance, Multiple; D019008:Drug Resistance, Neoplasm; D004357:Drug Synergism; D005260:Female; D006801:Humans; D007546:Isoquinolines / Q000494:pharmacology*; D044005:Tetrahydroisoquinolines; D014407:Tumor Cells, Cultured; D014750:Vincristine / Q000494:pharmacology*
chemical_list: D000470:Alkaloids; D000972:Antineoplastic Agents, Phytogenic; D044182:Benzylisoquinolines; D007546:Isoquinolines; D044005:Tetrahydroisoquinolines; C057222:neferine; C009438:tetrandrine; D014750:Vincristine; C035934:dauricine