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Abi prism 7000 system

Manufactured by Thermo Fisher Scientific
Sourced in United States, Japan, China

The ABI Prism 7000 system is a real-time PCR instrument designed for quantitative gene expression analysis. It is capable of performing real-time detection and analysis of DNA amplification.

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66 protocols using abi prism 7000 system

1

Evaluating LRP Expression in Simulated Microgravity

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PCR was used to evaluate LRP expression after 3, 7, 10, and 14 days of exposure to simulated microgravity, cyclic hydrostatic pressure, or six-well plate control and after sclerostin stimulation experiments described above (n = 3 per condition). RNA extraction was carried out using a Trizol (Invitrogen, Carlsbad, CA) extraction method following the manufacturer’s protocol. RNA concentration and quality were assessed using a NanoDrop spectrophotometer (Thermo Scientific, Wilmington, DE). RNA was reverse-transcribed using Marligen’s First-strand cDNA Synthesis System (Origene, Rockville, MD). RT-PCR was performed with an ABI Prism 7000 system (Applied Biosystems, Carlsbad, CA) using SYBR Green (Life Technologies, Grand Island, NY) for fluorescent detection. Primers were designed using the Integrated DNA Technologies (Coralville, IA) website. RT-PCR data were analyzed using the 2-ΔΔCT method [51 (link)] and 18s was used as the housekeeping control. Primer sequences used were: 18s5’AAGACGAACCAGAGCGAAAG3’, 3’TCTATGGCAGCATCAAGGCT5’; LRP45’GCAGCAAGAGGAAGGTACTAAT3’, 3’TCATAGGTTTCACGACTGGC5’; LRP55’CCATACAGGCCCTACATCATTC3’, 3’GATGGACCTGAACTTAAGCCTG5’; LRP65’GGGAGAAGTGCCAAAGATAGAA3’, 3’CTAATACTCCTCGCCTTCGAA5’.
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2

RNA Isolation and qRT-PCR Analysis

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Total RNA was isolated from selected samples as previously described (12 (link)). About 2 μg RNA were used for reverse transcription. The first-strand cDNAs were synthesized with SuperScript III reverse transcriptase (Invitrogen, Carlsbad, CA) and used as templates. qRT-PCR was performed using the ABI Prism 7000 system (Applied Biosystems, Foster City, CA), and the expression levels of selected genes were normalized to GhUB7 (GenBank accession number: DQ116441) using the 2-ΔCt calculated method as previously described (41 (link)). qRT-PCR was conducted with three biological replicates and three technical replicates for each biological replicate. The primers for qRT-PCR and RT-PCR are listed in Tables S1 and S2, respectively. All primers were designed using Primer Premier software version 5.0.
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3

Quantitative Real-Time PCR of TaSnRK2s

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Quantitative real-time PCR (qRT-PCR) was used to estimate TaSnRK2s transcript levels resulting from abiotic stresses and ABA application. qRT-PCR was performed with SYBR Premix Ex Taq (Takara, Shiga, Japan) using an ABI PRISM 7000 system (Applied Biosystems, Foster City, CA, USA). Specific primers were designed based on cDNA sequences (Supplementary Table S2). Expression of the wheat tubulin gene was used as an internal control for expression levels. The relative expression level of TaSnRK2s was calculated using the 2-ΔΔCT method (Livaka and Schmittgen, 2001 (link)).
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4

Quantifying Cenp-E mRNA Expression in Transfected LO2 Cells

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LO2 cells were collected 48 h after transfection, and RNA was extracted and converted into complementary DNA by reverse transcription (High Capacity cDNA Reverse Transcription kit; Thermo Fisher Scientific). The prepared Cenp-E, glyceraldehyde-3-phosphate dehydrogenase (GAPDH) standard (used as an internal control), primers and probes were used to perform qPCR amplification with an ABI PRISM® 7000 system (Applied Biosystems Life Technologies, Grand Island, NY, USA). The PCR conditions were as follows: initial denaturation at 94°C for 5 min, followed by 40 cycles of denaturation at 94°C for 30 sec, and annealing at 51°C for 30 sec. The PCR mixture included 2.5 µl Taq buffer (10X), 5 µl MgCl2 (25 mmol/l), 2 µl dNTP (2.5 mmol/l), 0.5 µl Cenp-E upstream primer (20 µmol/l), 0.5 µl Cenp-E downstream primer (20 µmol/l), 2 µl cDNA template, 0.3 µl Taq (5 U/µl), 0.6 µl TaqMan probe (10 µmol/l) and double distilled H2O (11.6 µl). Subsequently, the mRNA copy number ratio of target gene to GAPDH was calculated to determine the Cenp-E mRNA expression level in each group of cells. Based on the expression, the effect of the RNA interference plasmid vector on the expression of the target gene was then evaluated.
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5

Quantitative Real-Time PCR Analysis of APOE

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RNA from whole CNS and spleen was homogenized in trizol (Invitrogen; Carlsbad, CA) and isolated following the manufacturer’s instructions. Precipitated RNA was resuspended in THE RNA Storage solution (Invitrogen) and treated with rDNAse I (Invitrogen). Complementary DNA was generated with the high capacity cDNA reverse transcription kit using the random hexamer primer protocol (Invitrogen). Quantitative real-time PCR was performed on an ABI PRISM 7000 System (Applied Biosystems; Foster City, CA) using SYBR® Green detection (Invitrogen). Primers for APOE (5’ CGCAGG TAATCCCAGAAGC 3’) and (5’CTGACAGGATGCCTAGCCG 3’) along with 18s rRNA (5’ TTCGGAACTGAGGCCATGATT 3’) and (5’ TTTCGCTCTGGTCCGTCTTG 3’) were obtained from IDT (Coralville, IA). The relative quantitation (RQ) value was calculated using the ΔΔCt method with 18s as the internal control.
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6

Quantitative RT-PCR for Candida albicans

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Total C. albicans SC5314 RNA (1 μg) from yeast and hyphae was reverse-transcribed into cDNA using the iScriptTM cDNA synthesis kit (Cat# 170–8890, Bio-Rad, Hercules, CA) and amplified by iTaqTMFastSYBR Green Supermix with ROX (Cat#172–5103, Bio-Rad, Hercules, CA) using specific primer sets for each target gene and the housekeeping gene PMA1. Fluorescence from DNA-SYBR Green complex was monitored by the ABI PRISM 7000 System (Applied Biosystems, Foster City, CA) throughout the PCR reaction. The level of target mRNA relative to the mean of PMA1 was calculated by the comparative Ct method. ALS3 mRNA was detected with primers ALS3-F and ALS3-R.
To detect GFP mRNA in strain SKD233 (HCRc), total RNA from cells grown under hyphal conditions was used to prepare first strand cDNA using primer GFPstop that hybridizes to the 3' end of GFP mRNA. The first PCR, using nested primer GFP109 and the abridged anchor primer (AAP) (ThermoFisher Scientific, Waltham, MA) revealed only the hypha-specific GFP transcript under hyphal growth conditions. The second PCR using GFP109 and the abridged universal amplification primer (AUAP) to amplify products from the first PCR revealed a product that was specific to yeast growth conditions and labeled HCR-Y. For strains with terminator or terminator control sequences, GFP mRNA was detected with primers GFP70-F and GFP70-R.
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7

Tissue-Specific Expression Analysis of HD-ZIP IV Genes in Tobacco

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N. tabacum ‘K326’ seedlings were raised in a growth chamber at 22 °C with a 12/12 h light-dark photoperiod. For the tissue-specific expression analysis, cotyledons were sampled from one-week-old seedlings, and the leaf, root, stem epidermis, and the stem with its epidermis removed were sampled from three-week-old seedlings.
Total RNA was extracted and removed the residual DNA using DNase I. Quantitative real-time PCR (qRT-PCR) and semi-quantitative RT-PCR were employed to determine the relative mRNA transcriptions of HD-ZIP IVs in five tobacco tissues using the gene-specific primers (Additional file 1: Table S1). L25 gene was selected as an internal control. q-PCR reaction was performed on an ABI PRISM 7000 system (Applied Biosystems, USA) with the SYBR Green RT-PCR Kit (Takara, China). Each reaction was run in triplicate, and analysis was performed using the 2-ΔΔCT method [50 (link)].
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8

Quantitative Analysis of α-Sma and Fgf23 mRNA Expressions

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RNA was isolated from renal cortical tissues of rats by the phenol–chloroform extraction method and cDNA prepared as described previously [26 (link)]. The mRNA expression of α-smooth muscle actin (Sma) and fibroblast growth factor (Fgf) 23 was analyzed by real-time PCR using an ABI Prism 7000 system with Power SYBR Green PCR Master Mix (Applied Biosystems, Foster City, CA, USA). The oligonucleotide primers for rats used were as follows (forward and reverse, respectively): 5′-ACGGCGGCTTCGTCTT CT-3′ and 5′-CCAGCTGACTCCATGCCAAT-3′ for α-Sma [27 (link)]; 5′-TTGGATCGTATC ACTTCAGC-3′ and 5′-TGCTTCGGTGACAGGTAG-3′ for Fgf23 [28 (link)]; 5′-CCCTG GCTCCTAGCACCAT-3′, and 5′-CCTGCTTGCTGATCCACAT CT-3′ for β-Actin [27 (link)]. The abundance of target genes were normalized to β-Actin (as internal control) and analyzed by the 2−ΔΔCt method as described previously [29 (link)].
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9

Quantifying Iron Homeostasis Genes

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Total RNA was isolated using TRI-reagent (cat no.: T9424, Sigma-Aldrich) according to the manufacturer’s instructions. Assays were performed using an ABI Prism 7000 system (Applied Biosystems, Foster City). APP primers (forward, 5-GCCCTGCGGAATTGACAAG-3; reverse, 5-CCATCTGCATAGTCTGTGTCTG-3), ferroportin primers (forward, 5-CTACTTGGGGAGATCGGATGT-3; reverse, 5-CTGGGCCACTTTAAGTCTAGC-3), ferritin primers (forward, 5-CCCCCATTTGTGTGACTTCAT-3; reverse, 5-GCCCGAGGCTTAGCTTTCATT-3); transferrin receptor primers (forward, 5-GGCTACTTGGGCTATTGTAAAGG-3; reverse, 5-CAGTTTCTCCGACAACTTTCTCT-3); and β-actin primers (forward, 5-CATGTACGTTGCTATCCAGGC-3; reverse, 5-CTCCTTAATGTCACGCACGAT-3) were purchased from Life Technology.
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10

Analyzing LysM gene expression in entomopathogenic fungus

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Twelve LysM domain-containing protein genes are encoded by B. bassiana [30 (link)]. To examine the expression of these genes, total RNA was extracted from the mycelia or blastospores harvested from SDB and the conidial spores or hyphae from the PDA plates. To determine gene expression during fungal in vivo infection, the last instar larvae of wax moth (G. mellonella) were individually injected with 10 μl of spore suspension (107 spores/ml) for 60 hrs. Insect hemolymph was collected on ice, and fungal hyphal bodies were harvested by gradient centrifugation using Centricoll (Sigma-Aldrich) [30 (link)]. Each RNA sample was converted to cDNA using an AffinityScript multiple-temperature cDNA synthesis kit (Toyobo). qRT-PCR analysis was performed using a SYBR Premix Ex Taq kit (Takara) containing the primer pairs for different genes (S3 Table) on an ABI Prism 7000 system (Applied Biosystems). The β-tubulin gene (BBA_07018) of B. bassiana was amplified as an internal control. To determine insect antifungal gallerimycin gene expression, the last instar wax moth larvae were individually injected with the spore suspensions of WT and mutants for 36 hrs. Insect fat bodies were then dissected on ice and collected for RNA extraction to quantify the expression of the antifungal gene [9 (link)].
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