title: LY294002 induces p53-dependent apoptosis of SGC7901 gastric cancer cells.
abstract: OBJECTIVE
  To study the effects of LY294002, an inhibitor of class I phosphatidylinositol 3-kinase (PI3K), on proliferation and apoptosis of SGC7901 gastric cancer cells.
  
  
  METHODS
  The MTT assay was used to determine the cytotoxic effects of LY294002. Cell cycle distribution was analyzed using flow cytometry and apoptosis was assessed using flow cytometry analysis after staining DNA with propidium iodide. Mitochondrial membrane potential was measured using the fluorescent probe JC-1. Expression of p53 and PUMA was determined using real-time RT-PCR and Western blotting analysis.
  
  
  RESULTS
  The viability of SGC7901 cells was significantly reduced by LY294002 treatment. Expression of p53 and PUMA was induced, and mitochondrial membrane potential collapsed after treatment with LY294002. LY294002 induced apoptotic cell death.
  
  
  CONCLUSIONS
  Activation of the p53 pathway is involved in LY294002-induced SGC7901 cell death.
authors: Department of General Surgery, The Second Affiliated Hospital, Soochow University, Suzhou 215004, China.
authors: Chun-gen
authors: CG
authors: Xing
authors: Bao-song
authors: BS
authors: Zhu
authors: Hui-hui
authors: HH
authors: Liu
authors: Fang
authors: F
authors: Lin
authors: Hui-hua
authors: HH
authors: Yao
authors: Zhong-qin
authors: ZQ
authors: Liang
authors: Zheng-hong
authors: ZH
authors: Qin
mesh_terms: D017209:Apoptosis / Q000187:drug effects*; D001562:Benzimidazoles / Q000378:metabolism; D002232:Carbocyanines / Q000378:metabolism; D045744:Cell Line, Tumor; D002470:Cell Survival / Q000187:drug effects; D002867:Chromones / Q000494:pharmacology*; D004305:Dose-Response Relationship, Drug; D004791:Enzyme Inhibitors / Q000494:pharmacology*; D005456:Fluorescent Dyes / Q000378:metabolism; D005562:Formazans / Q000378:metabolism; D006801:Humans; D053078:Membrane Potential, Mitochondrial / Q000187:drug effects; D009025:Morpholines / Q000494:pharmacology*; D000081082:Phosphoinositide-3 Kinase Inhibitors; D013274:Stomach Neoplasms / Q000378:metabolism* / Q000473:pathology; D013778:Tetrazolium Salts / Q000378:metabolism; D013997:Time Factors; D016159:Tumor Suppressor Protein p53 / Q000378:metabolism*
chemical_list: D001562:Benzimidazoles; D002232:Carbocyanines; D002867:Chromones; D004791:Enzyme Inhibitors; D005456:Fluorescent Dyes; D005562:Formazans; D009025:Morpholines; D000081082:Phosphoinositide-3 Kinase Inhibitors; D013778:Tetrazolium Salts; D016159:Tumor Suppressor Protein p53; C068624:5,5',6,6'-tetrachloro-1,1',3,3'-tetraethylbenzimidazolocarbocyanine; C079782:MTT formazan; C085911:2-(4-morpholinyl)-8-phenyl-4H-1-benzopyran-4-one