title: [Effect of siRNA targeting HDAC1 gene on proliferation, apoptosis, histone acetylation, and histone methylation in gastric cancer cells in vitro].
abstract: OBJECTIVE
  To investigate the effect of silencing histone deacetylases 1 (HDAC1) gene by RNA interference on the proliferation, apoptosis and histone modulation in gastric cancer MGC-803 cell line.
  
  
  METHODS
  The optimal segment targeting HDAC1 gene was designed and transfected into MGC-803 cells by Lipofectamine TM2000. HDAC1 mRNA and protein in the transfected cells were detected by RT-PCR and Western blotting, respectively. The growth inhibition of MGC803 cells was evaluated by MTT assay and the cell apoptosis was detected with TUNEL assay. The expression of Bcl-2, procaspase-9, procaspase-3, c-Myc, histone acetylation of H3, H4, and histone methylation of H3K9 was detected by Western blotting.
  
  
  RESULTS
  The siRNA targeting HDAC1HDAC1 markedly suppressed mRNA expression, inhibited cell proliferation and induced apoptosis of MGC-803 cells in a concentration manner. Transfection of the cells with HDAC1 siRNA at 0, 30, 60, and 120 nmol/L for 24 h resulted in a cell apoptotic rate of (4.8∓2.7)%, (18.5∓3.5)%, (41.4∓4.3)%, and (59.2∓5.5)%, respectively, and caused down-regulation of the expressions of Bcl-2, proCaspase9, proCaspase3 and c-Myc, upregulation of histone acetylation of H3, H4, and down-regulation of histone methylation of H3K9.
  
  
  CONCLUSIONS
  Silencing HDAC1 gene expression with HDAC1 siRNA can promote histone H3 and H4 acetylation and inhibit histone methylation of H3K9 to suppress the proliferation and induce apoptosis of gastric cancer MGC-803 cells.
authors.affiliation: Department of Gastroenterology, Zhangzhou Hospital Affiliated to Fujian Medical University, Zhangzhou 363000, China.E-mail: tangdd110@163.com.
authors.forename: Hanxu
authors.initials: H
authors.lastname: Zhuang
authors.forename: Xudong
authors.initials: X
authors.lastname: Ma
authors.forename: Yadong
authors.initials: Y
authors.lastname: Lai
authors.forename: Xiangnong
authors.initials: X
authors.lastname: Xu
authors.forename: Xiaozhong
authors.initials: X
authors.lastname: Wang
mesh_terms: D000107:Acetylation; D017209:Apoptosis; D045744:Cell Line, Tumor; D049109:Cell Proliferation; D020868:Gene Silencing; D018390:Gene Targeting; D056284:Histone Deacetylase 1 / Q000235:genetics*; D006657:Histones / Q000378:metabolism*; D006801:Humans; D008745:Methylation; D034622:RNA Interference; D034741:RNA, Small Interfering
chemical_list: D006657:Histones; D034741:RNA, Small Interfering; C110550:HDAC1 protein, human; D056284:Histone Deacetylase 1