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7900 ht real time pcr

Manufactured by Thermo Fisher Scientific
Sourced in United States

The 7900 HT Real Time PCR is a laboratory instrument used for quantitative real-time polymerase chain reaction (qRT-PCR) analysis. It is designed to accurately measure and amplify targeted DNA sequences in real-time.

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8 protocols using 7900 ht real time pcr

1

qPCR Validation of Transcriptomic Analysis

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To validate expression of genes selected by transcriptomic analysis, RNA was extracted using Trizol (Life Technologies, Carlsbad, CA, USA) following the manufacturer’s instructions. For qPCR (quantitative polymerase chain reaction) assays, 100 ng of total RNA from each AGS-treated and untreated sample were retro-transcribed using the High Capacity cDNA Reverse Transcription Kit (Applied Biosystem, Waltham, MA, USA). Then, qPCR reactions were performed using 7900 HT Real Time PCR (Applied Biosystem). Gene specific primers for the selected genes are reported in Table 1.
Primers were designed at exon–exon junctions using Primer express 2.0 (Applied Biosystems, Whaltam, MA, USA). Target expression level was performed as previously described [11 (link)], using GAPDH as a housekeeping gene. All the experiments were performed in biological triplicate.
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2

Genetic Factors in NAFLD Diagnosis

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Genomic DNA was extracted from peripheral blood leukocytes using salting-out procedures. Genotyping was carried out by predesigned TaqMan probes (Applied Biosystem, USA), according to the manufacturers' protocol. Polymorphism genotyping was performed using 7900 HT Real Time PCR (Applied Biosystem, USA). We genotyped eleven genetic variants that have been previously robustly associated with NAFLD onset or progression: rs738409 (PNPLA3), rs58542926 (TM6SF2), rs1260326 (GCKR), rs2236212 (ELOVL2), rs116454156 (GPR120), rs1535 (FADS2), rs13412852 (LPIN1), rs641738 (MBOAT7), rs1800591 (MTTP), rs3750861 (KLF6) and rs4880 (SOD2). To estimate the overall contribution of the genetic variants under study on the risk of NAFLD and to test the diagnostic accuracy of this approach, a weighted genetic risk score (wGRS) was also derived from the SNP genotypes.
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3

PNPLA3 I148M Variant Genotyping

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In all participants genomic DNA was extracted from peripheral blood leukocytes using the QIAamp DNA Blood Mini Kit (Qiagen, Germany). Genotyping of rs738409 in patatin-like phospholipase domain-containing protein-3 (PNPLA3) gene (I148M variant) was carried out by a predesigned TaqMan probe (Applied Biosystem, California, USA), according to manufacturer's protocol. Single nucleotide polymorphism (SNP) genotyping was performed using 7900 HT Real-Time PCR (Applied Biosystem, California, USA). The call rate exceeded 99% for both SNPs and genotypes' distributions were in Hardy-Weinberg equilibrium. The minor allele frequency of PNPLA3 rs738409 was 28%.
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4

Gene Expression Analysis in Treated Cells

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RNA from treated or untreated cells was extracted using Trizol (Thermo Fisher Scientific, MA USA) following manufacturer’s instructions. 200 ng of total RNA from each sample were retro-transcribed using the High Capacity cDNA Reverse Transcription Kit (Applied Biosystem, Thermo Fisher Scientific, MA USA). qPCR reactions were performed by means of a 7900 HT Real Time PCR (Applied Biosystem) using gene specific primers for the following selected genes:
BAX: Forward 5′-TTTGCTTCAGGGTTTCATCCA-3′: Reverse 5′- CTCCATGTTACTGTCCAGTTCGT-3′; BCL-2: Forward 5′-GTTCCCTTTCCTTCCATCC-3′; Reverse 5′-TAGCCAGTCCAGAGGTGAG-3′; FAS: Forward 5′-CCCTCCTACCTCTGGTTCTTACG-3′; Reverse 5’TCAGTCACTTGGGCATTAACACTTT-3′; FASL: Forward 5′-CCTGAAAAAAAGGAGCTGAGGAA-3′; Reverse 5′-GGCATGGACCTTGAGTTGGA-3′; GAPDH: Forward 5′-CAAGGCTGTGGGCAAGGT-3′; Reverse 5′-GGAAGGCCATGCCAGTGA-3:
Primers were designed at exon-exon junctions using Primer express 2.0 (Applied Biosystems). Target expression level was performed as previously described [19 (link)] using GAPDH as housekeeping gene. All the experiments were performed in triplicate. Data are expressed as the mean ± SD.
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5

Quantitative Gene Expression Analysis in HD Mice

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RNAs were isolated from the cortex and striatum from one half of the brain of R6/2 mice, at different disease stage, and of age-matched WT control mice using Trizol, (Life Technologies). Tissue homogenization was performed using Tissue lyser (Qiagen) following manufacturer instructions. RNA quality was assessed using Experion system (BioRad). For qPCR assays, from each sample 200 ng of total RNA were retro-transcribed using the High Capacity cDNA Reverse Transcription Kit (Applied Biosystem). q-PCR was performed by means of a 7900 HT Real Time PCR (Applied Biosystem). Gene specific primers for the selected genes (Table 1) were designed at exon-exon junctions using Primer express 2.0 (Applied Biosystems). mRNA expression levels of TJ proteins were normalized over Cyclophilin A, used as internal control. Normalized values in HD tissues were then expressed as fold of change of normalized values in WT tissues. The entire procedure for q-PCR analysis, including primer design, reactions, amplicon specificity, and determination of gene target expression levels, was performed as previously described16 (link).
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6

Quantitative Gene Expression Analysis

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RNA extraction and q-PCR were essentially performed as previously described [19 (link)]. Brefly, Total RNA was isolated from each sample with Trizol (Thermo Fisher Scientific, Waltham, MA USA), as indicated by manufacturer. For each sample to analyse, cDNA was than obtained starting from 200 ng of total RNA using High Capacity cDNA Reverse Transcription Kit (Applied Biosystem, Thermo Fisher Scientific, Waltham, MA USA). The described selected genes using gene specific primers
BAX: Forward 5′-TTTGCTTCAGGGTTTCATCCA-3′: Reverse 5′- CTCCATGTTACTGTCCAGTTCGT-3′; BCL- 2: Forward 5′-GTTCCCTTTCCTTCCATCC-3′; Reverse 5′-TAGCCAGTCCAGAGGTGAG-3′; p53: Forward 5’-TCTGTCCCTTCCCAGAAAACC-3’; Reverse 5’-CAAGAAGCCCAGACGGAAAC-3′; GAPDH: Forward 5′-CAAGGCTGTGGGCAAGGT-3′; Reverse 5′-GGAA GGCCATGCCAGTGA-3’.
All primers were selected using a specific software (Primer express 2.0, Applied Biosystems, Foster city, CA, USA) and all of them specifically covered the exon-exon junctions. The analysis of gene expression was done as described in [20 (link)] and GAPDH gene was used as internal control. qPCRs were done using the 7900 HT Real Time PCR (Applied Biosystem) and for each experimental condition a triplicate was performed. Data obtained are expressed as the mean ± SD.
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7

PNPLA3 I148M Genotyping

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Genomic DNA was extracted from peripheral blood leukocytes using QIAamp DNA Blood Mini Kit (Qiagen, Germany). Genotyping of rs738409 in PNPLA3 gene was carried out by a predesigned TaqMan probe (Applied Biosystem, California, USA), underling the I148M substitution, according to manufacturers' protocol. Polymorphism genotyping was performed using 7900 HT Real Time PCR (Applied Biosystem, California, USA). Distribution of the genotype was in Hardy-Weinberg equilibrium and the call rate exceeded 99%. The allele G of rs738409 variant was present in 28.2% of chromosomes.
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8

DNA Extraction and Genotyping Protocol

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Genomic DNA was extracted from peripheral blood leukocytes using the QIAamp DNA Blood Mini Kit (Qiagen, Germany). Genotyping of both rs738409 in patatin-like phospholipase domain-containing protein-3 (PNPLA3) gene and rs58542926 in transmembrane 6 superfamily member 2 (TM6SF2) gene were carried out by a predesigned TaqMan probe (Applied Biosystem, California, USA), according to manufacturers' protocol. Polymorphism genotyping was performed using 7900 HT Real-Time PCR (Applied Biosystem, California, USA) (21) (link).
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