title: Inhibitory effects of short hairpin RNA against caspase-8 on apoptosis of murine hepatoma Hepa1-6 cells.
abstract: Caspase-8 plays an important role in death-receptor-mediated apoptosis of hepatocytes. We constructed short hairpin RNAs (shRNAs) against caspase-8 and investigated the effects of caspase-8 targeting shRNAs on apoptosis of Hepa1-6 cells induced by TNF-alpha. Oligonucleotides coding for four shRNAs against caspase-8 were cloned into mammalian expression vector Pgenesil-1 containing U6 promoter, which were then introduced into Hepa1-6 cells using liposome-mediated transfection. Effects of caspase-8-shRNAs on apoptosis of Hepa1-6 cells induced by TNF-alpha were detected by PI apoptosis detection kit. Effects of caspase-8-shRNAs on caspase-8 mRNA expression in apoptosis Hepa1-6 cells induced by TNF-alpha were detected by real-time fluorescent RT-PCR. Of the four caspase-8-shRNAs, Pgenesil-caspase-8-1 and Pgenesil-caspase-8-2 were successfully constructed. The apoptosis of Hepa1-6 cells induced by TNF-alpha was significantly inhibited by either Pgenesil-caspase-8-1 or Pgenesil-caspase-8-2 (p < 0.05). Caspase-8 mRNA expression levels in apoptosis Hepa1-6 cells induced by TNF-alpha were significantly decreased by either Pgenesil-caspase-8-1 or Pgenesil-caspase-8-2 (p < 0.05). This study suggested that shRNAs against caspase-8 could effectively inhibit apoptosis of Hepa1-6 cells induced by TNF-alpha by suppressing caspase-8 mRNA expression.
authors.affiliation: Department of Rheumatism & Immune Disease, Shandong Provincial Hospital, Ji'nan, Shandong, China.
authors.forename: Sen
authors.initials: S
authors.lastname: Lin
authors.forename: Xia
authors.initials: X
authors.lastname: Liu
authors.forename: Ruihong
authors.initials: R
authors.lastname: Yin
authors.forename: Dexiao
authors.initials: D
authors.lastname: Kong
authors.forename: Yundong
authors.initials: Y
authors.lastname: Qu
authors.forename: Yuanchao
authors.initials: Y
authors.lastname: Zhang
mesh_terms: D000818:Animals; D017209:Apoptosis / Q000187:drug effects / Q000235:genetics / Q000502:physiology*; D006528:Carcinoma, Hepatocellular / Q000235:genetics / Q000628:therapy*; D053181:Caspase 8 / Q000235:genetics*; D045744:Cell Line, Tumor; D008113:Liver Neoplasms / Q000235:genetics / Q000628:therapy*; D051379:Mice; D034741:RNA, Small Interfering / Q000235:genetics / Q000502:physiology*; D020133:Reverse Transcriptase Polymerase Chain Reaction; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology
chemical_list: D034741:RNA, Small Interfering; D014409:Tumor Necrosis Factor-alpha; D053181:Caspase 8