Journal: Cell Death & Disease
Article Title: Loss of TIMP3 by promoter methylation of Sp1 binding site promotes oral cancer metastasis
doi: 10.1038/s41419-019-2016-0
Figure Lengend Snippet: a Western blot results of Sp1 and TIMP3 after transfection of GFP vector and GFP-SP1 vector, β-actin was used as internal control. b Western blot results of Sp1 and TIMP3 after knockdown of Sp1, β-actin was used as internal control. c TIMP3 promoter activity after transfection of Sp1 overexpression vector, β-gal was used to normalize transfection efficiency. * p < 0.05 compared with GFP. d TIMP3 promoter activity after mutation of the Sp1 binding sites, β-gal was used to normalize transfection efficiency. * p < 0.05 compared with pGL3-TIMP3. e SCC9 and TW2.6 cells were transfected with the control siRNA or Sp1 siRNA. After 24 h, cells were treated with the vehicle control (DMSO) or 5-aza (10 μM) for 96 h before total RNA was subjected to qPCR analysis. * p < 0.05 compared with treatment of scrambled siRNA and DMSO. # p < 0.05 compared with treatment of Sp1 siRNA and DMSO. f SCC9 and TW2.6 cells were treated with the vehicle control (DMSO) or 5-aza (10 μM) for 96 h and were subjected to immunoprecipitation with an antibody against Sp1, DNMT1, and DNMT3B. The precipitates were subjected to PCR amplification using primers directed to Sp1 binding site of the TIMP3 promoter. g DNMT1 and DNMT3B levels in HNSCC tissues and normal tissues from TCGA database. h DNMT1 and DNMT3B levels in oral cancer cell lines and normal oral cell lines. i The mRNA expression of DNMT1 and DNMT3B after transfection of DNMT1 siRNA or DNMT3B siRNA. * p < 0.05 compared with scrambled siRNA. j TIMP3 levels after knockdown of DNMT1 or DNMT3B in SCC9 and TW2.6 cells. * p < 0.05 compared with scrambled siRNA
Article Snippet: TIMP3 (MAB3318) antibodies were purchased from Millipore (Billerica, MA, USA).
Techniques: Western Blot, Transfection, Plasmid Preparation, Control, Knockdown, Activity Assay, Over Expression, Mutagenesis, Binding Assay, Immunoprecipitation, Amplification, Expressing