Omega, Shanghai, China) and identified by DNA sequencing. Therefore, the wild type plasmid was created containing the 39UTR of NOB1 with complementary sequence of miR-326 (pGL3NOB1 39-UTR wild), and a mutant plasmid was generated containing the mutation sequence without complementary sequence of miR-326 (pGL3-NOB1 39-UTR mut). Primer sequences were as follows: NOB1-39UTR wild-F, 59-CAAGCTTAGCGAGTTCCCGCAGGCAAAT-39 NOB1-39-UTR wild-R, 59-CTCTAGACATGATCTCTGGGCACAC-39 NOB1-39-UTR mut-F, 59-CAAGCTTAGCGAGTTCCCGCAGGCAAAT-39 NOB1-39-UTR mut-R, 59-CTCTAGACATGATCTCTTTTCACACAGC-39 For the MedChemExpress PS-1145 luciferase reporter assays, the human malignant glioma cell line U87 was seeded on 24-well plates and co-transfected using Lipofectamine 2000 (Invitrogen, CA, USA) with 100 ng/well of the resulting luciferase UTR-report vectors, 2 ng/well of pRLCMV vector (internal control, Promega) and and 20 ng/well of miR-326 precursor molecules or control precursor (Applied Biosystems, CA, USA) following the instructions of the manufacturer. 24 hours after transfection, the cells were lysised and the relative luciferase activity was asssessed with the Dual-Luciferase Assay Reporter System (Promega, Shanghai, China). The experiments were performed independently in triplicate.silencing were measured via western blotting and real-time PCR analysis.Microarray AnalysisMicroarray analysis was performed as previously reported [15]. In brief, the total RNAs were extracted from 20 fresh frozen human glioma samples (8 high-grade glioma and 12 low-grade glioma) and 1 normal brain tissues, and then biotinylated and hybridized to 23148522 Affymetrix U133 expression arrays prior to scanning for quantitation. The microarray data have been deposited in the Gene Expression Omnibus (GEO) (http://www.ncbi.nlm.nih. gov/geo/) and are accessible through GEO Series accession number GSE45921.Reverse Transcription and Real-time PCRTotal RNA from frozen tissue and cell samples was isolated using the Trizol reagent (Invitrogen) according to the manufacturer’s instructions. Total RNA (2 mg) was reverse transcribed using M-MLV Reverse Transcriptase Kit (Promega) according to the manufacturer’s 223488-57-1 protocol. Resultant cDNA (20 ng) was mixed with SYBR GreenMasterMix (BioRad) and amplified in CFX96 real-time detection system (Bio-Rad) according to the manufacturer’s protocol. Each sample runs in triplicates for each gene. Relative expression levels of NOB1 mRNA were calculated by normalizing to the level of GAPDH mRNA by using comparative threshold cycle (ct) method, in which fold difference = 2?gct of target gene ct of reference) . Primers for amplification of NOB1 mRNA were 59-ATCTGCCCTACAAGCCTAAAC-39 and 59TCCTCCTCCTCCTCCTCAC-39. The primers for housingkeeping gene GAPDH was 59-GAAGGTGAAGGTCGGAGTC39 and 59-GAAGATGGTGATGGGATTTC-39.Cell TransfectionA172, U373 and HEK293T cells were seeded in 24-well plates overnight and then transiently transfected with miR-326 precursor, control miR-326 antisense oligonucleotide or siRNA oligos using Lipofectamine 2000 (Invitrogen, CA, USA) following the instructions of the manufacturer. Precursor miRNA and control oligos were obtained from Applied Biosystems. The scrambled shRNA (stem oop tem structure) targeting NOB1 sequence were designed and synthesized (NOB1-shRNA: AAGGTTAAGGTGAGCTCAT). At 48 hours after transfection, the effects of geneProtein Extraction and Western BlottingProteins were extracted from human glioma tissues or a subconuent culture of cells, and were then characte.Omega, Shanghai, China) and identified by DNA sequencing. Therefore, the wild type plasmid was created containing the 39UTR of NOB1 with complementary sequence of miR-326 (pGL3NOB1 39-UTR wild), and a mutant plasmid was generated containing the mutation sequence without complementary sequence of miR-326 (pGL3-NOB1 39-UTR mut). Primer sequences were as follows: NOB1-39UTR wild-F, 59-CAAGCTTAGCGAGTTCCCGCAGGCAAAT-39 NOB1-39-UTR wild-R, 59-CTCTAGACATGATCTCTGGGCACAC-39 NOB1-39-UTR mut-F, 59-CAAGCTTAGCGAGTTCCCGCAGGCAAAT-39 NOB1-39-UTR mut-R, 59-CTCTAGACATGATCTCTTTTCACACAGC-39 For the luciferase reporter assays, the human malignant glioma cell line U87 was seeded on 24-well plates and co-transfected using Lipofectamine 2000 (Invitrogen, CA, USA) with 100 ng/well of the resulting luciferase UTR-report vectors, 2 ng/well of pRLCMV vector (internal control, Promega) and and 20 ng/well of miR-326 precursor molecules or control precursor (Applied Biosystems, CA, USA) following the instructions of the manufacturer. 24 hours after transfection, the cells were lysised and the relative luciferase activity was asssessed with the Dual-Luciferase Assay Reporter System (Promega, Shanghai, China). The experiments were performed independently in triplicate.silencing were measured via western blotting and real-time PCR analysis.Microarray AnalysisMicroarray analysis was performed as previously reported [15]. In brief, the total RNAs were extracted from 20 fresh frozen human glioma samples (8 high-grade glioma and 12 low-grade glioma) and 1 normal brain tissues, and then biotinylated and hybridized to 23148522 Affymetrix U133 expression arrays prior to scanning for quantitation. The microarray data have been deposited in the Gene Expression Omnibus (GEO) (http://www.ncbi.nlm.nih. gov/geo/) and are accessible through GEO Series accession number GSE45921.Reverse Transcription and Real-time PCRTotal RNA from frozen tissue and cell samples was isolated using the Trizol reagent (Invitrogen) according to the manufacturer’s instructions. Total RNA (2 mg) was reverse transcribed using M-MLV Reverse Transcriptase Kit (Promega) according to the manufacturer’s protocol. Resultant cDNA (20 ng) was mixed with SYBR GreenMasterMix (BioRad) and amplified in CFX96 real-time detection system (Bio-Rad) according to the manufacturer’s protocol. Each sample runs in triplicates for each gene. Relative expression levels of NOB1 mRNA were calculated by normalizing to the level of GAPDH mRNA by using comparative threshold cycle (ct) method, in which fold difference = 2?gct of target gene ct of reference) . Primers for amplification of NOB1 mRNA were 59-ATCTGCCCTACAAGCCTAAAC-39 and 59TCCTCCTCCTCCTCCTCAC-39. The primers for housingkeeping gene GAPDH was 59-GAAGGTGAAGGTCGGAGTC39 and 59-GAAGATGGTGATGGGATTTC-39.Cell TransfectionA172, U373 and HEK293T cells were seeded in 24-well plates overnight and then transiently transfected with miR-326 precursor, control miR-326 antisense oligonucleotide or siRNA oligos using Lipofectamine 2000 (Invitrogen, CA, USA) following the instructions of the manufacturer. Precursor miRNA and control oligos were obtained from Applied Biosystems. The scrambled shRNA (stem oop tem structure) targeting NOB1 sequence were designed and synthesized (NOB1-shRNA: AAGGTTAAGGTGAGCTCAT). At 48 hours after transfection, the effects of geneProtein Extraction and Western BlottingProteins were extracted from human glioma tissues or a subconuent culture of cells, and were then characte.
