title: [Study on human leukemia cell apoptosis inducing effect of fraction C of Naja naja Actra Venom].
abstract: OBJECTIVE
  To study the effect and mechanism of fraction C isolated from Naja naja Actra Venom (FCNNAV) in inducing apoptosis of human leukemia cells.
  
  
  METHODS
  Light microscope, transmission electron microscope, DNA electrophoresis, flow cytometry and RT-PCR assay were used to observe the changes of human leukemia cells in morphology and biochemistry, and Bcl-2/Bax expression after exposing to FCNNAV.
  
  
  RESULTS
  FCNNAV could induce HL60 cells apoptosis demonstrated by the typical morphological and biochemical changes. Flow cytometry showed that J6-1, K562, HL60 and fresh leukemia cells apoptosis could be induced by FCNNAV, and the apoptosis rate was dose-dependent. RT-PCR detection showed the Bcl-2 gene expression of HL60 cells was down-regulated by FCNNAV, whereas the Bax expression was unaffected.
  
  
  CONCLUSIONS
  FCNNAV could induce apoptosis of human leukemia cells and this effect is related to down-regulation of Bcl-2 gene expression level.
authors.affiliation: Second Affiliated Hospital of Guangzhou Medical College, Guangzhou (510260).
authors.forename: H
authors.initials: H
authors.lastname: Tan
authors.forename: Y
authors.initials: Y
authors.lastname: Hao
authors.forename: H
authors.initials: H
authors.lastname: Ying
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D017209:Apoptosis / Q000187:drug effects*; D004546:Elapid Venoms / Q000737:chemistry / Q000494:pharmacology*; D005260:Female; D018922:HL-60 Cells / Q000473:pathology; D006801:Humans; D020014:K562 Cells / Q000473:pathology; D015473:Leukemia, Promyelocytic, Acute / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D054198:Precursor Cell Lymphoblastic Leukemia-Lymphoma / Q000473:pathology*; D011518:Proto-Oncogene Proteins / Q000096:biosynthesis / Q000235:genetics; D019253:Proto-Oncogene Proteins c-bcl-2 / Q000096:biosynthesis / Q000235:genetics; D012333:RNA, Messenger / Q000096:biosynthesis / Q000235:genetics; D051028:bcl-2-Associated X Protein
chemical_list: C494826:BAX protein, human; D004546:Elapid Venoms; D011518:Proto-Oncogene Proteins; D019253:Proto-Oncogene Proteins c-bcl-2; D012333:RNA, Messenger; D051028:bcl-2-Associated X Protein