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Iscript reverse transcription supermix for qrt pcr

Manufactured by Bio-Rad
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The IScript Reverse Transcription Supermix for qRT-PCR is a reagent used for the reverse transcription of RNA to cDNA, which can then be used for quantitative real-time PCR (qRT-PCR) analysis. It contains all the necessary components, including reverse transcriptase, RNase inhibitor, and optimized buffer, in a single ready-to-use solution.

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33 protocols using iscript reverse transcription supermix for qrt pcr

1

Quantifying RNA Expression Using Direct-zol Extraction

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Total RNA was extracted from the livers or cells using the Direct-zol RNA MiniPrep Kit with on-column DNA digestion (Zymo Research, CA, USA) as described previously.11 (link) For mRNA analysis, cDNA was transcribed from total RNA using iScript Reverse Transcription Supermix for qRT-PCR (Bio-Rad, Hercules, CA, USA). Quantitative real-time PCR was performed using iCycler (Bio-Rad). The mean of the quantification cycle (Cq) of all samples was normalized to 18S mRNA expression, and relative expression was calculated by the ΔΔCt method. Primer sequences were the same as we have described previously.11 (link) For miRNA quantification, cDNA synthesis and qRT-PCR were performed from total RNA using TaqMan miRNA assays (Applied Biosystems, USA). Cq of the target miRNA was normalized either with small nucleolar RNA (snoRNA)-202 (mouse) or RNU48 (human) Cq. For detection of pri-miR-155, cDNA was generated using iScript Reverse Transcription Supermix for qRT-PCR (Bio-Rad), and TaqMan primers and probes specific for mmu-pri-miR-155-FAM and mouse GAPDH-fluorescein (FAM) (control) were used (Applied Biosystems, USA). The qPCR, western blot, and in-vitro experiments were performed with independent replicates.
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2

Gene Expression Analysis of Immune Markers

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Total RNA was extracted from isolated cells (splenocytes, sorted cells) and cerebral cortices (bregma + 2 to − 3 mm) using Tri reagent (MRC, OH). cDNA was synthetized with iScript reverse transcription supermix for qRT-PCR (Bio-Rad). qRT-PCR was conducted with cDNA in duplicate reactions using the Maxima SYBR Green/ROX qPCR Master Mix (2×) (Thermo Scientific). The reactions were performed in 20-μl total volume and incubated at 50 °C for 2 min and then at 95 °C for 10 min followed by 40 cycles of 15 s at 95 °C and 1 min at 60 °C. All samples were run in triplicate. The relative mRNA level of each gene was normalized to that of the housekeeping gene GAPDH. The sequences of the primers used are shown in Table 1.

Sequences of PCR primers used in this study

GeneForwardReverse
CD1475′-GACACTGGGGAAGAAGAGGC-3′5′-GCAGTGAGATGGTTTCCCGA-3′
TNF-α5′-AGTCCGGGCAGGTCTACTTT-3′5′-ACCCTGAGCCATAATCCCCT-3′
IL-1β5′-ATGCCACCTTTTGACAGTGATG-3′5′-GCAGCCCTTCATCTTTTGGG-3′
IL-65′-CCTTCCAGGATGAGGACATGA-3′5′-TGAGTCACAGAGGATGGGCTC-3′
Arg15′-TCACCTGAGCTTTGATGTCG-3′5′- CTGAAAGGAGCCCTGTCTTG-3′
MCP-15′-CCCCAAGAAGGAATGGGTCC-3′5′-GTGCTGAAGACCTTAGGGCA-3′
Ly6C5′-ACTGTGCCTGCAACCTTGT-3′5′-GCTGGGCAGGAAGTCTCAAT-3′
CCR25′-ATCCACGGCATACTATCAACATC-3′5′-CAAGGCTCACCATCATCGTAG-3′
iNOS5′-CAAGCACCTTGGAAGAGGAG-3′5′- AAGGCCAAACACAGCATACC-3′
GAPDH5′-GCGAGATCCCGCTAACATCA-3′5′-CTCGTGGTTCACACCCATCA-3′
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3

RNA Isolation and qRT-PCR Analysis

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RNA was isolated from young adult worms using a TRIzol (Life Technologies) chloroform extraction and cDNA was prepared using iScript Reverse Transcription Supermix for qRT-PCR (Bio-Rad). qRT-PCR was used to measure the expression levels of target genes (iTaq Universal SYBR Green Supermix, Bio-Rad) and normalization controls pmp-3 and cdc-42 (TaqMan Gene Expression Assays, Life Technologies). The relative standard curve method was used to calculate gene expression. Primers of target genes are listed in S2 Table.
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4

RNA Extraction and cDNA Synthesis from Liver and Skeletal Muscle Tissues

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Approximately 50 mg of liver tissue was homogenized in 1 mL TRIzol and RNA extracted using the RNeasy Plus Universal Mini Kit (Qiagen, Germantown, MD, USA #73404). Approximately 70 mg of skeletal muscle tissue was homogenized and RNA extracted using the TRIzol™ Reagent (Invitrogen ThermoFisher Scientific, Waltham, MA, USA #15596026) according to the manufacturer’s protocol. RNA quality and concentration were measured using a Nanodrop spectrophotometer (ND-1000; Thermo Scientific). cDNA was synthesized from 1 μg of RNA using iScript Reverse Transcription Supermix for qRT-PCR (BioRad, Berkeley, CA, USA #1708840) with a Veriti 96-well Thermal Cycler (Applied Biosystems, Watham, MA, USA) and the following run protocol, 25 °C for 5 min, 46 °C for 20 min, 95 °C for 1 min. Liver cDNA was diluted 1:4 in ddH2O. Skeletal muscle cDNA was not diluted.
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5

Quantitative RT-PCR Assay for CHEK1 and RAD54L

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RNA is isolated by using RNeasy mini kit (QIAGEN) according to the manufacturer's instructions. RNA concentration is determined using a Nanodrop 2000 (Thermo Scientific). cDNA is synthesized by using iScript reverse transcription supermix for qRT-PCR (Bio-rad) according to the manufacturer's protocol. The reverse-transcribed cDNA is analyzed by quantitative RT-PCR (qRT-PCR), and 18S is used as an internal control. Each qRT-PCR includes a 10-μl reaction mixture per well that includes 2.5 μl cDNA, 0.5 μl forward primer (0.5 μM), 0.5 μl reverse primer (0.5 μM), 1.5 μl of DNase/RNase-free distilled water, and 5 μl SYBR green reagent (QIAGEN). The following cycles are performed during DNA amplification: 94°C for 2 minutes, 40 cycles of 94°C (30 seconds), 60°C (30 seconds), and 72°C (40 seconds). 18S is used as an internal control. The primer sequences are showed below: CHEK1 forward: TCATCCATTTCTAACAAATTCACTT, CHEK1 reverse: TGGGCTATCAATGGAAGAAAA, RAD54L forward: GAGCCCAGAGGACCTTGATA, RAD54L reverse: AACCACCTTGTCTGGACAGC, 18S forward: GGCCCTGTAATTGGAATGAGTC and 18S reverse: CCAAGATCCAACTACGAGCTT.
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6

RNA Extraction and qRT-PCR Analysis

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Total RNA was isolated from cells using the standard Trizol (Invitrogen, Carlsbad, CA) protocol following the manufacturer’s instructions. Reverse Transcription was performed with 1μg RNA using iScript™ Reverse Transcription Supermix for qRT-PCR (BIO-RAD, Hercules, CA, USA). Regular PCR reactions were performed using Fast Start Taq dNTPack (Roche Diagnostics, IN, USA). Quantitative real-time PCR reactions were performed using iTaq Universal SYBR Green Supermix (BIO-RAD, Hercules, CA, USA) using the CFX Connect™ Real-Time PCR Detection System (BIO-RAD). Primer sets used for the study are listed in Table 1. For regular PCR, amplified cDNA was resolved on EtBr containing 2% agarose gels. For real-time PCR mean Ct values of the target genes were normalized to mean Ct values of one or more the housekeeping control genes (Ribosomal protein large 13 A (RPL13A), β Actin, Peptidylprolyl Isomerase A (PPIA) and Hypoxanthine phosphoribosyltransferase 1 (HPRT1)) [-ΔCt = Ct (housekeeping gene) – Ct (target gene)]. The ratio of mRNA expression of target genes versus the housekeeping gene was defined as 2(-ΔCt). Melting curve analysis was performed to check the specificity of the amplified product.
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7

Quantitative Analysis of CDK2 Expression

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RNA is isolated by using RNeasy mini kit (QIAGEN) according to the manufacturer's instructions. RNA concentration is determined using a Nanodrop 2000 (Thermo scientific). cDNA is synthesized by using iScript reverse transcription supermix for qRT-PCR (Bio-rad) according to the manufacturer's protocol. The reverse-transcribed cDNA is analyzed by quantitative RT-PCR (qRT-PCR), and GAPDH or 18 s is used as an internal control. Each qRT-PCR includes a 10 μl reaction mixture per well that includes 2.5 μl cDNA, 0.5 μl forward primer (0.5 μM), 0.5 μl reverse primer (0.5 μM), 1.5 μl of DNase/RNase-free distilled water, and 5 μl SYBR green reagent (QIAGEN). The following cycles are performed during DNA amplification: 94 °C for 2 min, 40 cycles of 94 °C (30 s), 60 °C (30 s), and 72 °C (40 s).18S is used as an internal control. The primer sequences are showed below: CDK2-Forward: GAATCTCCAGGGAATAGGGC, CDK2-Reverse: CTGAAATCCTCCTGGGCTG, 18S-Forward: GGCCCTGTAATTGGAATGAGTC and 18S-Reverse: CCAAGATCCAACTACGAGCTT.
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8

HPV16 E6 Gene Expression Analysis

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Cell lines [Tal3, TC-1 (positive control) and HEK293 (negative control)] were cultured in vitro and lysed in TRIzol. Cellular RNA was isolated using Direst-zol MicroPrep Kit (Zymogen) and cDNA was made using iScript Reverse Transcription Supermix for qRT-PCR (Bio-Rad) according to the supplied protocols. Gene transcript was amplified using the isolated RNA as a template and HPV16 E6 primers (forward, ACAAACCGTTGTGTGATTTGTT; reverse, CAGTGGCTTTTGACAGTTAATACA) with a Touchdown qPCR assay, as described previously (31 (link)). Subsequently, 1 μL of qPCR product was transferred to a 1% agarose gel with 0.01% ethidium bromide and run at 130V for 45 minutes. Resultant bands were visualized using the ChemiDoc Touch Imaging System (Bio-Rad).
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9

Quantitative RT-PCR Analysis of Gene Expression

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RNA is isolated by using RNeasy mini kit (QIAGEN) according to the manufacturer’s instructions. RNA concentration is determined using a Nanodrop 2000 (Thermo scientific). cDNA is synthesized by using iScript reverse transcription supermix for qRT-PCR (Bio-rad) according to the manufacturer’s protocol. The reverse-transcribed cDNA is analyzed by quantitative RT-PCR (qRT-PCR), and 18S is used as an internal control. Each qRT-PCR includes a 10 μL reaction mixture per well that includes 2.5 μL cDNA, 0.5 μL forward primer (0.5 μM), 0.5 μL reverse primer (0.5 μM), 1.5 μL of DNase/RNase-free distilled water, and 5 μL SYBR green reagent (QIAGEN). The following cycles are performed during DNA amplification: 94°C for 2 min, 40 cycles of 94°C (30 s), 60°C (30 s), and 72°C (40 s). 18S is used as an internal control. The primer sequences are showed below: TTK-Forward: GATTGCCACTGTTTCTGGTT, TTK-Reverse: AACCCTGAAGAATAAAACGGA, MTFR2-Forward: GAAACTGGATCCCAATGTGAA, MTFR2-Reverse: GAATAAGGTTAAGCTTCGTGCAA, CD133-forward: ACTCCCATAAAGCTGGACCCC, CD133-reverse: TCAATTTTGGATTCATATGCCTT, 18S-Forward: GGCCCTGTAATTGGAATGAGTC and 18S-Reverse: CCAAGATCCAACTACGAGCTT.
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10

Quantitative RT-PCR Analysis of HER2 in Metastatic Breast Cancer

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Example 19

Total RNA was extracted from the 21MT-1 metastatic breast cancer cell line at 72 hours post transfection using Trizol (Life Technologies) and following standard RNA extraction protocol. RNA quantity and quality was assessed by a NanoDrop (Thermo Scientific) UV/VIS spectrophotometer, cDNA was made with iScript Reverse Transcription Supermix for qRT-PCR (Bio-Rad), and a RealPlex thermocycler (Eppendorf) was used to create cDNA (5 min 25° C., 30 min 42° C., 5 min 85° C.). Following cDNA creation, qRT-PCR was performed by using the SYBR Green Master Mix (Life Technologies), and a per-reaction use of 500 nM of both the forward and reverse primers with 10 ng of cDNA. The qRT-PCR was performed with a 40 cycle amplification (95° C. for 10 seconds, 56° C. for 30 seconds, and 72° C. for 30 seconds) and a threshold intensity of 50 (during linear phase). The primers used for the qRT-PCR analysis are as follows:

Human GAPDH:
(SEQ ID NO: 1)
(R: 5′-AGG-GGC-CAT-CCA-CAG-TCT-TC-3′);
(SEQ ID NO: 2)
(F: 5′-AGA-AGG-CTG-GGG-CTC-ATT-TG-3′)
Human HER2:
(SEQ ID NO: 3)
(R: 5′-TGA-TGA-GGA-TCC-CAA-AGA-CC-3′);
(SEQ ID NO: 4)
(F: 5′-AAC-TGC-ACC-CAC-TCC-TGT-GT-3′).

The ΔΔCt Method was used to calculate changes in gene expression, and at least three biological samples were analyzed.

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