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Asteponeplus real time pcr system

Manufactured by Thermo Fisher Scientific
Sourced in United States

The AStepOnePlus Real-Time PCR System is a compact, benchtop instrument designed for gene expression analysis, genotyping, and other real-time PCR applications. It utilizes fluorescence-based detection technology to monitor and quantify target DNA sequences in real-time during the amplification process.

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21 protocols using asteponeplus real time pcr system

1

Quantitative PCR Analysis of Gene Expression

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Total RNA was purified from liver tissues using a Takara MiniBEST Universal RNA Extraction kit, and subjected to RT using PrimeScript RT Master mix. qPCR was performed using SYBR Premix Ex Taq and aStepOnePlus™ Real-Time PCR system (Applied Biosystems; Thermo Fisher Scientific, Inc., Waltham, MA, USA). GAPDH served as an internal control. Sequences of primers were as follows: Forward, 5′-GACAATGGCTCTGGGCTCTGTA-3′ and reverse, 5′-TTTGGCCCATTCCAACCATTA-3′ for α-SMA; forward, 5′-CCATGGAACCGATCAGTGTG-3′ and reverse, 5′-GCCGACTATGCCAGTCAAGAA-3′ for CXCR4; forward, 5′-CACACGTTGGTACAGAGCTCCAG-3′ and reverse, 5′-TGCAGCCCACAGACCAAATATC-3′ for ERK1; forward, 5′-CTGGACCAGCTCAACCACATTC-3′ and reverse, 5′-AGGTAGTTTCGGGCCTTCATGTTA-3′ for ERK2; forward, 5′- AGCACAGATACCACCAAGACACA-3′ and reverse, 5′-CAGGTCTCGCTTCTTCACACAC-3′ for NF-κBp65; forward, 5′-GCCACAGGATTACAAGAAGC-3′ and reverse, 5′-CCACCAGAGTGAAAAGAACG-3′ for β-catenin; and forward, 5′-AAATGGTGAAGGTCGGTGTGAAC-3′ and reverse, 5′-CAACAATCTCCACTTTGCCACTG-3′ for GAPDH. The details of the thermocycling conditions were as follows: 95°C for 30 sec (initial denaturation), followed by 40 cycles at 95°C for 5 sec (exact denaturation) and 60°C for 30 sec (primer annealing and PCR product elongation). The relative quantity of target genes mRNA was normalized to that of GAPDH using the 2-ΔΔCq method, as previously described (7 (link)).
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2

Lung Tissue RNA Extraction and RT-qPCR Analysis

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Total RNA was extracted from lung tissues using an RNeasy Mini kit (Qiagen,
Duesseldorf, Germany) and cDNA was synthesized using the TOPscrip™ RT
DryMIX (Enzynomics, Daejeon, Korea). PCR amplification was performed using a
Step One Plus real-time PCR system (Applied Biosystems, Warrington, UK) with
TOPreal™ qPCR 2X PreMIX (Enzynomics). Relative expression was normalized
against GAPDH expression by the ΔΔCt method. Sequences of primers
used in this study are listed in Table
1
.
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3

Quantitative PCR for Transcriptome Analysis

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We performed qPCR as described in our previous work.12 (link) We homogenized fresh ECT samples in Trizol reagent (Life Technologies,
Cat. No: 15596026), using an Omnitip Tissue homogenizer (USA Scientific, Ocala,
USA; Cat. No. 6615-7273) and isolated total RNAs with the RNeasy Mini Kit
(Qiagen, Valencia, USA; Cat. No. 74104) according to the manufacturer’s
instructions. We measured RNA quality and quantity using the NanoDrop ND-2000
(ThermoFisher Scientific). Both 260/280 and 260/230 ratios of RNA samples were
approximately 2.00. We performed reverse transcription with the SuperScript VILO
cDNA synthesis system (Invitrogen, Cat. No.11754-050). To conduct qPCR, we
applied TaqMan Gene Expression Assays (ThermoFisher Scientific) with a
StepOnePlus Real-time PCR system (Applied Biosystems) and used 18 S rRNA as
endogenous control. All qPCR experiments were performed with 2–3 biological
replicates and technical triplicates for each group.
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4

Hippocampal Gene Expression Analysis

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Mouse dorsal hippocampal tissue was rapidly dissected and placed in RNAlater (Sigma, Munich, Germany) for 4 days at 4 °C. Hippocampal tissue from home cage and fear conditioned mice was collected at the same time to account for possible time of the day effects. The CA1 region was microdissected and RNA was isolated using the RNeasy Plus Mini Kit (Qiagen, Hilden, Germany) with additional on-column DNase I digestion, according to the manufacturer's instructions. RNA was reverse transcribed with the High-Capacity complementary DNA reverse-transcription kit (Applied Biosystems, Foster City, CA, USA) to generate complementary DNA. Reverse-transcription quantitative PCR (RT-qPCR) was performed on a
Step One Plus Real Time PCR System (Applied Biosystems, Foster City, CA, USA) using TaqMan gene expression assays (Applied Biosystems, Foster City, CA, USA) for the Arc (Mm00479619_g1), c-Fos (Mm00487425_m1) and Npas4 (Mm00463644_m1). Expression levels of target genes were normalized to the expression of the housekeeping gene GusB (Mm00446953_m1). Controls were used to exclude the possibility of DNA or RNA contaminations.
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5

Immune Response Gene Expression in Jejunum

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TRIzol® (Invitrogen, Grand Island, NY, USA) was used to extract
total RNA from jejunum samples according to the manufacturer’s procedure,
and the RNA purity and concentration were measured using a Nanodrop
spectrophotometer (Thermo Scientific, Wilmington, DE, USA). cDNA samples were
synthesized with the High-Capacity cDNA Reverse Transcription kit (Applied
Biosystems, Carlsbad, CA, USA). Gene expression levels related to the immune
response in the jejunum (interleukin [IL]-2,
IL-4, IL-6, tumor necrosis factor
[TNF]-α;
IFN-γ, transforming growth factor
[TGF]-β) were determined using a
RealHelixTM Premier qPCR kit (NanoHelix, Daejun, Korea) with a
StepOnePlus Real-Time PCR System (Applied Biosystems, Carlsbad, CA, USA).
Primers for the target genes are listed in Table
2
. Glyceraldehyde 3-phosphate dehydrogenase (GAPDH) was used as a
housekeeping gene, and the 2−ΔΔCt method was
used to quantify relative mRNA expression levels.
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6

Quantitative RT-PCR in Macrophages

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For quantitative RT-PCR, BMDMs were stimulated with A. fumigatus, and RNA was extracted using TRIzol Reagent. cDNA was generated from RNA using the Applied Biosystems High-Capacity RNA-to-cDNA Kit (ThermoFisher cat#: 4387406), and qRT-PCR was performed on aStepOnePlus Real Time PCR System (Applied Biosystems) using TaqMan Fast Advanced Master Mix and TaqMan Gene Expression Assays (ThermoFisher Scientific) Atp6v1c1 (Mm00445925) and Ctsb (Mm01310506).
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7

Relative Expression of HvmALP1 and HvmALP2 Isoforms

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Relative expression levels for HvmALP1 and HvmALP2 isoforms (accession numbers FJ416470 and FJ416471, respectively) were determined by reverse transcription quantitative polymerase-chain reaction (RT-qPCR). For this purpose, total RNA of dissected midguts from both colonies (Vip-Unsel and Vip-Sel) was isolated using RNAzol (MRC Inc., Cincinnati, OH) according to the manufacturer's protocol. Each RNA (1 µg) was reverse-transcribed to cDNA using random hexamers and oligo (dT) by following the instructions provided in the Prime-Script RT Reagent Kit (Perfect Real Time from TaKaRa Bio Inc., Otsu Shiga, Japan). RT-qPCR was carried out in a
StepOnePlus Real-Time PCR system (Applied Biosystems, Foster City, CA). Reactions were performed using 5× HOT FIREpol EVAGreen qPCR Mix Plus (ROX) from Solis BioDyne (Tartu, Estonia) in a total reaction volume of 25 µl. Specific primers for HvmALP1, HvmALP2 and Rps18 (endogenous control) genes were as described elsewhere (23) . The REST MCS software was used for gene expression analysis (51) .
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8

Comprehensive Transcriptome Analysis Protocol

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Total RNA was isolated employing the RNeasy Plus kit (Qiagen) according to manufacturer's protocol.
Extracted RNA was reversed transcribed into cDNA using random hexamer priming and Superscript III (ThermoFisher) according to the protocol supplied by the manufacturer. For qPCR, cDNA templates were amplified, and the C T values were quantified with PowerUp SYBR Green Master Mix (ThermoFisher), and normalized to actin as an internal control. Experiments were performed using a
StepOnePlus Real-Time PCR System (Applied Biosystems). poly(A)-mRNA was isolated using Ambion® Poly(A)Purist™ MAG Kit (ThermoFisher) according to manufacturer's protocol. Nuclear and cytoplasmic separation of RNA was performed with Thermo Scientific NE PER Nuclear and Cytoplasmic Extraction Kit (ThermoFisher) according to manufacturer's protocol. RNA in either the nuclear pellets or cytoplasmic fractions was extracted with RNeasy Plus kit (Qiagen). Total RNA extracted per fraction was quantified and used to calculate the percentage of mRNA localization for the RT-qPCR quantification. The list of primers is provided in Supplementary Data (Supplementary Table S1).
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9

Metagenomic Sequencing of Environmental DNA

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DNA extracts of PM2.5 and sewage/sludge/effluent samples were diluted 10 and 100 times, respectively, to minimize PCR inhibition before quantification of the 16S rRNA gene on a
StepOnePlus Real-Time PCR System (Applied Biosystems). The dilution factor was determined by testing a number of randomly selected samples (for details of qPCR, please refer to Section S2 of the Supporting Information). Subsequently, around 25-100 ng undiluted DNA of each sample was used for low-input library construction and shotgun metagenomic sequencing on an Illumina Hiseq X Ten platform with the PE150 strategy. In total, 444 GB of clean data from 20 samples (excluding field blanks that failed in library construction) were obtained after trimming sequencing adaptors and filtering low-quality reads using fastp [37] .
The sequencing data were uploaded to the NCBI BioProject database (https://www.ncbi.nlm.nih.gov/bioproject/) with the accession number of PRJNA693982.
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10

Plant RNA Extraction and Tissue-Specific Expression Analysis

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RNA was purified from plant tissue with the GeneJet Plant RNA Purification Mini kit (Thermo Scientific), according to instructions provided by the manufacturer. For tissuespecific expression, different sets of plants were grown simultaneously for each tissue sample. For expression in leaves, plants were grown for about 4 weeks (growth stage about 3.70 in the Boyes' scale; Boyes et al., 2001) (link). Stems, flowers, leaves, and siliques were collected from five plants that were 6 weeks old (growth stage about 6.50) and pooled according to the tissue. Gene expression was analyzed by RT-qPCR in a
StepOnePlus Real-Time PCR System (Applied Biosystems) using the GoTaq 1-Step RT-qPCR kit (Promega) following manufacturer's recommendations (see Supplementary Table S1 for details on the oligonucleotide primers used for amplification). The StepOne Software v.2.2.2 (Applied Biosystems) was used for data analysis according to the comparative C T method (Schmittgen and Livak, 2008) (link), with At1g13320 (PP2A-A3, subunit A3 of the serine/threonine phosphatase type 2A) and At2g28390 (MON1, a SAND family protein) used as reference genes (Czechowski et al., 2005) (link).
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