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Abi prism 7000

Manufactured by Thermo Fisher Scientific
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The ABI Prism 7000 is a real-time PCR system designed for gene expression analysis and quantification. It is capable of detecting and measuring DNA and RNA targets with high sensitivity and specificity.

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532 protocols using abi prism 7000

1

Quantitative Analysis of mRNA Expression

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Total RNA was extracted from liver tissues, L02 cells, and mouse primary hepatocytes using a RNeasy mini kit (Qiagen; Valencia, CA, USA). RNA was reversely transcribed into cDNA and subjected to qPCR analysis. The expression of mRNA for the mouse Acer3 gene, human ACER3 gene, mouse interleukin 6 (Il-6), mouse tumor necrosis factor-α (Tnf-α), mouse transforming growth factor-β (Tgf-β), mouse or human β-Actin were measured by qPCR with corresponding primers (Supplementary Table S1). qPCR was done on an ABI Prism 7000 sequence detection system (Thermo; Ringoes, NJ, USA), and results were analyzed with the ABI Prism 7000 software (Thermo; Ringoes, NJ, USA). The mRNA levels of a gene of interest were calculated by the delta–delta CT method using the mouse or human β-Actin gene as the reference gene.
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2

Gene Expression Analysis by qRT-PCR and miRNA Quantification

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RNA was extracted from cells using the TRIzol (Invitrogen).
For mRNA quantification, total RNA was reverse transcribed using an oligo(dT) primer (Invitrogen). mRNA levels were analyzed by QuantiTect SYBR Green PCR kit (QIAGEN) using ABI PRISM 7000 (Applied Biosystems). mRNA levels were normalized using the GUSB and GAPDH genes as housekeeping genes. The following primer sets were used (see Table 1).
For the determination of the expression level of selected genes of DNA repair systems using the TaqMan Low Density Arrays method (Applied Biosystems).
For miRNA quantification, total RNA was reverse transcribed using TaqMan microRNA Reverse Transcription Kit (Life Technologies). Primers for miR-33a and miR-200a were obtained from Life Technologies. miRNA levels were analyzed by the TaqMan microRNA Assays (Life Technologies) using ABI PRISM 7000. miRNA expression was normalized using the U6snRNA as control.
Relative expressions were calculated using the comparative Ct method (2−ΔΔCt).
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3

Quantitative analysis of Acer gene expression in brain tissue

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RNAs were extracted from fresh brain tissues using RNeasy mini kits (Qiagen; Valencia, CA) according to the manufacturer’s instructions. The RNAs were reversely transcribed into cDNAs, which were subjected to qPCR analyses as described [67 (link)] using primer pairs specific to each of the following genes: Acer1 (5’-ATGCTCATAGGTCTGTTCTC-3’ and 5'-AGTGGTTATAGTTACCAGGC-3’), Acer2 (5’-GTGTGGCATATTCTCATCTG-3’ and 5’-TAAGGGACACCAATAAAAGC-3’), Acer3 (5’-GTGTGGCATATTCTCATCTG-3’ and 5’-TAAGGGACACCAA TAAAAGC), and β-Actin (5’- GATGTATGAAGGCTTTGGTC-3’ and 5’-TGTGCACTTTTATTGGTCTC-3’). qPCR was performed on an ABI Prism 7000 sequence detection system and mRNA levels for each gene were analyzed with the ABI Prism 7000 software (Applied Biosystems). Relative mRNA levels of Acer1, Acer2, or Acer3 were estimated using ΔΔCt method as described [68 (link)] with β-Actin as internal control.
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4

Fibroblast Response to TGF-β1 and Antifibrotic Treatments

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RNAs were extracted from IPF and normal lung fibroblasts 24 h and 72 h after TGF-β1 treatment with either IFN-γ, PFD or both using RNeasy mini kits (Qiagen; Valencia, CA, USA) according to the manufacturer’s instructions. The RNAs were reverse transcribed into cDNAs, which were subjected to qPCR analyses using primer pairs specific to each of the following genes: COL1A1, ACTA2, MMP1, MMP3, MMP7, MMP8, MMP9, TIMP1, TIMP2 and YWHAZ (TaqMan™ Gene Expression Assay (FAM), Thermo-Fisher Scientific, Waltham, MA USA). qPCR was performed on an ABI Prism 7000 sequence detection system, and mRNA levels for each gene were analyzed with ABI Prism 7000 software (Applied Biosystems, Waltham, MA USA). Relative quantification of each target gene was performed using the comparative CT (2-∆∆CT) method with YWHAZ (tyrosine 3 monooxygenase/tryptophan 5-monooxygenase activation protein, zeta polypeptide) used as a housekeeping gene for the normalization of mRNA expression levels as reported in previous studies [36 (link), 37 ]. Data were plotted as 2-ΔΔCT (mean fold change) using Graph Pad prism software.
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5

Quantifying Laminin Expression in Developing Mouse Embryos

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Embryos from E6.5 to E16.5 were dissected in PBS. Extraembryonic membranes were removed as much as possible, especially from early embryos, to avoid contamination. Total RNA was extracted using an RNeasy Kit (Qiagen) and reverse-transcribed with SuperScript™ II Reverse Transcriptase (Invitrogen) and random primers. Quantitative PCR was performed with Power™ SYBR™ Green Master Mix (Applied Biosystems) and an ABI PRISM 7000 (Thermo Fisher Scientific). The target genes and their primers are listed in Table 2. The expression levels of the target genes were normalized by those of glyceraldehyde-3-phosphate dehydrogenase (GAPDH). The relative expression levels were indicated with the highest level in the analyzed stages set at 100.

Target genes and their primers for quantitative RT-PCR.

Table 2
Target geneGene symbolPrimer 1Primer 2
Laminin α1Lama1tggagacggtggacagtgacctcagccactgccaagtctatagca
Laminin α2Lama2cagtcagaagatggatggaatgggtcgtttgtatcagctgatgtcga
Laminin α3Lama3gggaaggtcacgacctctatgaAatgagttccacacagggagtgt
Laminin α4Lama4Agaatctctgtgatggcagatgggcagctttactgaagctcacagg
Laminin α5Lama5tggctcctacctggatggcagctccacacgcaccaacacacg
GAPDHGapdhtcctgcaccaccaactgcttagctggatgcagggatgatgttctgg
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6

Molecular Profiling of Ischemic Brain Tissue

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The ipsilateral ischemic brain tissue and the homologous contralateral brain tissue (Figure 2A) were isolated. Total RNA was isolated and quantitative-PCR was performed in the ABI Prism 7000 sequence detection system (Thermo Fisher Scientific, Carlsbad, CA, USA), using the Quantitec SYBY Green PCR kit (Qiagen, Germantown, MD, USA). The following primers were designed using Primer Express software (ABI, Thermo Fisher Scientific, Carlsbad, CA, USA). GAPDH: Fwd, AGAACATCATCCCTGCATCC; Rev: CACATTGGGGGTAGGAACAC. MBP: Fwd, ATCCAAGTACCTGGCCACAG; Rev, CCTGTCACCGCTAAAGAAGC; ApoER2: Fwd, AGTGTCCCGATGGCTCTGAC; Rev, CAGCTTAACTTCTCGGCAGGA.
Equal amounts of brain tissue lysate were subjected to WB analysis. Specific proteins were visualized using a SuperSignal West Pico chemiluminescence kit (Pierce, Appleton, WI, USA). The following primary antibodies were used: anti-ApoER2 (1:1000, ab204112, Abcam, Cambridge, UK), anti-Syn (1:5000, MAB5258, Chemicon, Temecula, CA, USA), anti-MBP (1:500, MAB386, Millipore, Burlington, MA, USA), and anti-β-actin (1:10000; ab6276, Abcam, Cambridge, UK).
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7

Quantitative Gene Expression Analysis

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Total RNA was extracted using TRIzol (Invitrogen). First-strand cDNA was synthesized from total RNA using PrimeScript Reverse Transcriptase (Takara Bio Inc). For qPCR, an ABI PRISM7000 (Thermo Fisher Scientific) or StepOne (Applied Biosystems) system was used with the Light Cycler SYBR Green I Master Mix (Takara). The relative quantitation value is expressed as 2−ΔCt, where ΔCt is the difference between the mean cycle threshold (Ct) values of triplicates for each sample and that of the Gapdh control. Primer sequences were previously described (2 (link)) and are listed (Table S1).
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8

Osteoclastogenesis Modulation by IL-35

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RAW cells were incubated with or without RANKL (50 ng/mL) and IL-35 (10, 50, or 100 ng/mL) for 2 days. Total RNA was isolated from cultured cells using a NucleoSpin® RNA (Macherey-Nagel Inc., Bethlehem, PA, USA), according to the manufacturer’s instructions. cDNA was synthesized from the total RNA by the action of ReverTra Ace® (Toyobo Co. Ltd., Osaka, Japan). TaqMan gene expression assays were used to measure MMP-9 (Mmp9:Mm00442991-m1), cathepsin K (Ctsk:Mm00484039-m1), TRAP (Acp5:Mm00437135-m1), NFATc1 (Nfatc1:Mm00479445-m1), and CLCN7 (Clcn7:Mm00442400-m1) expression using TaqMan Universal PCR master mix (Thermo Fisher Scientific, Wilmington, DE, USA). 18S rRNA (Hs99999901-s1) was used for normalization of target gene expression levels. Reactions were performed with initial denaturation at 95 °C for 10 min, followed by 40 cycles of 95 °C for 15 s and 60 °C for 1 min using the ABI Prism 7000 sequence detection system (Thermo Fisher Scientific). Quantification of mRNA for the target cytokine was conducted using the cycle threshold (CT) values of the target gene and 18S rRNA. The fold change in mRNA expression levels was determined as follows: 2−ΔΔCt, where ΔΔCT = [(CT of target − CT of 18S rRNA (treated group)) − (CT of target − CT of 18S rRNA (control group))].
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9

Quantitative Analysis of HCN Channels

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Real-time PCR was performed using the Taq-Man universal PCR master mix (Thermo Fisher Scientific, Massachusetts, USA) and the ABI Prism 7000 sequence detection system (Thermo Fisher Scientific, USA) (Budde et al. 2005 (link); Kanyshkova et al. 2014 (link)). The PCR program was as follows: 2 min at 50 °C, 10 min at 95 °C, 50 cycles of 15 s at 95 °C and 1 min at 60 °C. Results were analyzed with ABI Prism 7000 SDS software. Quantification was done using the comparative CT or ΔΔCT method as described in the ABI User Bulletin#2 (Thermo Fisher Scientific). Hybridization primer/probe assays for real-time PCR detection of hcn1, hcn2, hcn3, and hcn4 were purchased from Thermo Fisher Scientific.
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10

Quantitative miRNA Expression Analysis

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We determined the amounts of the individual miRNAs by real-time quantitative RT-PCR with a TaqMan MicroRNA Assay (Thermo Fisher Scientific) and the following miRNA-specific stem-loop primers: hsa-miR-148b (000471), hsa-miR-326 (000542), hsa-let7b (000378), and RNU6B (001093). Subsequently, quantitative real-time PCR was performed with an ABI Prism 7000 sequence detection system (Thermo Fisher Scientific). The reaction was initiated by incubation at 95°C for 2 minutes, followed by 50 cycles of 95°C for 15 seconds and then 60°C for 1 minute. All reactions were run in duplicate. Mean (Ct) values for all miRNAs were quantified with sequence detection system software (SDS version 1.02; Thermo Fisher Scientific). All miRNA expression was normalized to RNU6B expression, yielding a −ΔCt value, as reported elsewhere.20 (link) The −ΔΔCt value was then calculated by subtracting the −ΔCt value of the normal sample from the respective −ΔCt values of patient samples. Expression of all miRNAs was normalized by using the 2−ΔΔCt method.
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