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9 protocols using ampigene qpcr green mix lo rox

1

Hippocampal BDNF mRNA Quantification

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The hippocampus was homogenized using the TissueLyser LT magnetic bead homogenizer (Qiagen, Hilden, Germany) with 50-mm stainless-steel beads for 5 min at 50 Hz. Total RNA was isolated using TRIzol reagent (Life Technologies, Carlsbad, CA, USA), and cDNA was synthesized from RNA using the M-MLV RT reaction buffer (Promega, Madison, WI, USA) according to the manufacturer’s instructions. The cDNA was mixed with forward and reverse primers for Bdnf coding (forward: GCGGCA-GATAAAAAGACTGC; reverse: GCAGCCTTCCTTGGTGTAAC), and Bdnf promoter (forward: GCCTTCATGCAACCGAA-GTA; reverse: CAGGACAGCAAAGCCACAAT) (Sleiman et al., 2016 (link)) in a 96-well plate containing AMPIGENE qPCR Green Mix Lo-ROX (Enzo Life Science, Farmingdale, NY, USA). To normalize mRNA levels among samples, Actb (forward: CCAACC-GTGAAAAGATGACC; reverse: CCATCACAATGCCTGTGGTA) was used as a housekeeping gene. Each sample was examined in triplicate. Sequences of all primers were entered 5′ to 3′ order. The reaction was performed using a LightCycler 96 real-time PCR system (Roche Diagnostics, Basel, Switzerland). The cycle threshold (Ct) values measured after the experiment were analyzed by the relative quantification 2−ΔΔC(T) method.
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2

Quantifying Gene Expression Levels

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Total RNA was extracted as described previously (53 (link)). To quantify the expression levels of target genes, equal amounts of cDNAs were synthesized using 0.5 μg total RNA treated with RQ1 RNase-free DNase I (Promega, Madison, WI, USA), SuperScript IV reverse transcriptase (Thermo Fisher Scientific, Waltham, MA, USA), and oligo(dT) according to the manufacturer’s protocols. qRT-PCR was performed using AmpiGene qPCR Green Mix Lo-ROX (Enzo Biochem, New York, NY, USA) and assessed with a GeneAmp 7500 sequence detection system (Applied Biosystems, Foster City, CA, USA), as described previously (56 (link)). Viral accumulation was analyzed as described previously (57 (link)). The glyceraldehyde-3-phosphate dehydrogenase gene (gpd) was used as an internal control. Analyses were conducted from at least two independent RNA preparations, in triplicate for each transcript, using primers specific to gpd and the target genes. Primer pairs for each gene are provided in Table S1 in the supplemental material (15 (link)). Transcript abundance, relative to the amount of gpd, in each sample was calculated based on fold change in the expression of target genes, normalized to the internal control gpd (58 (link)).
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3

Quantifying Duck LEAP-2 Transcripts

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To analyze the transcripts of duck LEAP-2 in various organs, the following primers were designed using Primer-BLAST (https://www.ncbi.nlm.nih.gov/tools/primer-blast/): glyceraldehyde-3-phosphate dehydrogenase (GAPDH) forward 5′-TGG TGCTGATACGTTGTGGAGTC-3′ and reverse 5′-AGC TGAGGGGGCGGAGATGA-3′, duck-LEAP-2 forward 5′-TG ACACCGTTCTGGAGAGGA-3′ and reverse 5′-GATCTG AGGAAGCAGCGGTT-3′. Quantitative real-time polymerase chain reaction (qRT-PCR) was performed using AMPIGENE qPCR Green Mix Lo-ROX (Enzo Life Sciences, Lausen, Switzerland) according to the manufacturer’s instructions, using the LightCycler 96 system (Roche, Indianapolis, IN, USA). The duck GAPDH gene was used as a control to normalize for RNA quantity. The relative quantification of gene-specific expression was calculated using the 2−ΔΔCt method following normalization with the GAPDH gene expression level [19 (link)].
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4

Quantitative Gene Expression Analysis

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Total RNA was extracted from leaves using an Easy-Spin total RNA extraction kit (iNtRON Biotechnology, Seoul, Korea), then used for first-stand cDNA synthesis by the GoScript Reverse Transcription System (Promega, Madison, WI, USA) according to the manufacturer’s protocols. The gene expression level was determined using a real-time PCR system (CFX96, Bio-Rad, Hercules, CA). Reaction volumes (20 µL) contained 1 µL of cDNA, 1 µL of each amplification primer (10 µM), 10 µL of 2 × AMPIGENE qPCR Green Mix Lo-ROX (Enzo Life Sciences Inc., Farmingdale, NY, USA), and 7 µL ddH2O (double distilled water). The 2−ΔΔCt method was conducted to determine the relative levels of gene expressions, and the 18S gene was used as the reference gene. The primers used are listed in Table 2.
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5

Kidney Gene Expression Analysis

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Total RNA was extracted from the kidney tissue or cultured kidney cells using the Total RNA Isolation Kit (Macherey‐Nagel), according to the manufacturer's instructions. The SensiFAST cDNA Synthesis Kit (Meridian Bioscience Inc.) was used for cDNA synthesis. Real‐time PCR was performed using the AMPIGENE® qPCR Green Mix Lo‐ROX (Enzo Life Sciences, Inc.). The primer sequences used for mRNA analysis are listed in the Table S1.
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6

Quantitative Real-Time PCR Analysis

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Total RNA was extracted from each sample using TRIzol reagent (Gibco BRL) according to the manufacturer’s instructions. An equal amount of total RNA (1 μg) was used as a template and reverse-transcribed into cDNA using a first-strand cDNA synthesis kit (Promega Corp.) and under the following conditions: 95 °C for 5 min, 37 °C for 2 h and 75 °C for 15 min. Next, qRT-PCR reaction mixtures were assembled using 50 ng of cDNA, 10 pmol of the aforementioned ING4 or TRAIL primers, and the AmpiGene qPCR Green Mix Lo-ROX (Enzo Life Sciences, Lausen, Switzerland). The reactions were amplified and analyzed in triplicate using the ABI 7500 Real-Time PCR system (Applied Biosystems, Foster City, CA, USA), and 18S ribosomal RNA was used as an internal control.
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7

RNA Extraction and qRT-PCR Analysis

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To prepare the total RNA, A498 and Caki-1 cells were lysed using TRIzol Reagent (Invitrogen, Thermo Fisher Scientific) after transfection with miRNA mimics. Total RNA was synthesized into cDNA using the Maxime RT PreMix Kit (iNtRON, Seongnam, Republic of Korea). In brief, 1 μg of total RNA and pure water were added into the Maxime RT PreMix tubes up to 20 μL, and the mixture was incubated as follows, according to the manufacturer’s protocol: cDNA synthesis, 45 °C for 60 min, and RTase inactivation step, 95 °C for 5 min. To quantify mRNA expression, qRT-PCR analysis was performed using the AMPIGENE qPCR Green Mix Lo-ROX (Enzo Life Sciences, Seoul, Republic of Korea). According to the manufacturer’s protocol, a mixture of cDNA, reagents, and specific primers was prepared and incubated as follows: one cycle, 95 °C for 2 min; 40 cycles, 95 °C for 5 s; and 60 °C for 30 s. The specific primers used are listed in Table 1. Data were analyzed using the 2−ΔΔCt method and normalized to glyceraldehyde-3-phosphate dehydrogenase expression.
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8

Quantifying Key Genes in Sucrose, Starch, and Flowering

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The expression of key genes related to sucrose synthesis (CseSSS-4), starch synthesis (CseSS-7), photosynthesis (CsePsaA-7), and flowering (Cse_sc015873.1_g020.1 and Cse_sc001459.1_g030.1) were chosen from “https://plantgaden.jp/en/list/t1111766” and http://mum-garden.kazusa.or.jp/ (accessed on 27 November 2021). All the leaves were immediately frozen in liquid nitrogen. The total RNA was extracted using an Easy-Spin total RNA extraction kit (iNtRON Biotechnology, Seoul, Korea), then used for first-stand cDNA synthesis with the GoScript Reverse Transcription System (Promega, Madison, WI, USA) according to the manufacturer’s protocols. Real-time quantitative PCR was conducted in a real-time PCR system (CFX96, Bio-Rad, Hercules, CA, USA). Reaction volumes (20 μL) contained 1 μL of cDNA, 1 μL of each amplification primer (10 μM), 10 μL of 2 × AMPIGENE qPCR Green Mix Lo-ROX (Enzo Life Sciences Inc., Farmingdale, NY, USA), and 7 μL ddH2O (double distilled water). The 2−ΔΔCt method was used for the data analysis, and the ACTIN gene (Cse_sc001321.1_g010.1) was selected as the control. All the target gene primers are listed in Table 5.
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9

Chrysanthemum Transcriptional Regulation Analysis

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The expanding leaves of both ‘Gaya Glory’ and ‘Pearl Egg’, of chrysanthemum at the same stage were harvested on six plants with three lighting directions for a consideration of the RNA abundance and the sensitivity of the blade to lighting. The expression of key genes related to sucrose synthesis (CseSSS-1, CseSSS-4, CseSSS-7, and CseSSS-8), starch synthesis (CseSS-1, CseSS-6, CseSS-7, and CseSS-9), photosynthesis (CsePsaA-6 and CsePsaA-7), and flowering (CseFPF1, CsePEF3, CsePEF4, and CseFCA) were measured. All the leaves were immediately frozen in liquid nitrogen. The total RNA was extracted using an Easy-Spin total RNA extraction kit (iNtRON Biotechnology, Seoul, Korea), which was then used for a first-stand cDNA synthesis with the GoScript Reverse Transcription System (Promega, Madison, WI, USA) according to the manufacturer’s protocols. A real-time quantitative PCR was conducted in a real-time PCR system (CFX96, Bio-Rad, Hercules, CA, USA). T reaction volumes (20 μL) contained 1 μL of cDNA, 1 μL of each amplification primer (10 μM), 10 μL of 2 × AMPIGENE qPCR Green Mix Lo-ROX (Enzo Life Sciences Inc., Farmingdale, New York, NY, USA), and 7 μL ddH2O (double distilled water). The 2−ΔΔCt method was used for the data analysis, and the ACTIN gene (Cse_sc001321.1_g010.1) was selected as the control. All the target gene primers are listed in Table 4.
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