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9 protocols using sybr green taq readymix

1

Quantitative Analysis of H19 and VDAC1 in Cardiomyocytes

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Total RNA was isolated from myocardial tissues and neonatal cardiomyocytes using TRIzol Reagent (Invitrogen). RNA was reverse transcribed using SuperScript First Strand cDNA System (Invitrogen) according to the manufacturer’s instructions. Quantitative PCR was conducted using SYBR Green Taq ReadyMix (Sigma) on an Applied Biosystems 7500 Real-Time PCR System, and GAPDH was used as the endogenous control. The primer sequences are as follows: H19, 5′-TATCGGACTCCAGAGGGATT-3′ and 5′-GGCATACAGTGCACCAAGTC-3′; VDAC1, 5′-TGCCATTTTAGGGTGGAGAG-3′ and 5′-GTGCGGCTACAAGAGGAGTC-3′. For miRNA real-time PCR, the miR-specific primers from the TaqMan miR assays (Applied Biosystems) were applied, and the snRNA U6 was used as an endogenous reference.
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2

Quantitative RT-PCR for IL-6 Expression

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RNA was extracted from cell cultures using TRIzol reagent (Sigma) and reverse transcribed to complementary DNA using Tetro cDNA synthesis kit (Bioline) according to the manufacturer’s recommendations. Real-time quantitative PCR was performed with SYBR Green Taq ReadyMix (Sigma), using the following primer pairs for human IL-6: sense 5′-AGTTCCTGCAGAAAAAGGCA-3′ and antisense 5′-AAAGCTGCGCAGAATGAGAT-3′ and human 18sRNA: sense 5′-GGGAGGTAGTGACGAAAAAT-3′ and antisense 5′-ACCAACAAAATAGAACCGCG-3′. Data were analyzed using an ABI Prism 7900 system (Applied Biosystems) and were normalized to a GAPDH reference. Real-time PCR data were analyzed using the 2−ΔΔCt method [25] (link).
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3

Quantitative Real-Time PCR Analysis of Rat Slit and Robo

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Rat brain and vascular tissues were homogenized in lysis buffer (RLT, Qiagen) at 4°C using a Fast Prep homogenizer (Thermo Electron Corporation). Total RNA was isolated using RNeasy Mini Kits (Qiagen). RNA was reverse-transcribed with oligo-dT priming using the Advantage cDNA PCR kit (BD Biosciences, San Jose, CA). Primer sets used to amplify rat Slit ligands, Robo receptors and ICAM-1 are listed in Table 1. Relative quantitative real-time PCR was performed using the Roche LightCycler real-time thermal cycler (Roche Diagnostics). cDNA samples (100 ng each) were mixed with primers and the SYBR green Taq Ready Mix (Sigma, St. Louis, MO) for a total volume of 20 μl. Each gene was normalized to 18s (human/rat/mouse 18s, Lux primer set, Invitrogen) from the same sample. Amplified products were analyzed by electrophoresis on 2% agarose gels containing ethidium bromide (E-gels, Invitrogen) to confirm primer specificity. Rat β-actin (Lux primer set, Invitrogen) was amplified from the same cDNA samples for electrophoretic analysis.
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4

Cardiac Gene Expression Analysis by qPCR

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Total RNA was isolated from cardiac tissue and cells using TRIzol Reagent (Invitrogen, Carlsbad, CA, USA). RNA was reverse transcribed using SuperScript First Strand cDNA System (Invitrogen, USA). Quantitative PCR was performed using SYBR Green Taq ReadyMix (Sigma, USA) on an Applied Biosystems 7500 PCR system. GAPDH was used as the endogenous control in this study. The primer sequences are as follows: MIAT, 5′-GAGGGAAGTTCTGAGCTTGG-3′ and 5′-CCTTTCTTCTGGGCTGAGAC-3′ DAPK2, 5′-TCCTGGATGGGGTGAACTAC-3′ and 5′-CAGCTTGATGTGTGGAATGG-3′ GAPDH, 5′-TGCCCAGAACATCATCCCT-3′ and 5′-GGTCCTCAGTGTAGCCCAAG-3′. The relative expression of genes was presented as fold change and calculated using the 2−ΔΔCT method.
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5

Quantitative RT-PCR Analysis of Gene Expression

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Total RNA was extracted using an RNeasy kit (Qiagen) and reverse transcribed to cDNA using Omniscript reverse transcriptase (Qiagen) according to manufacturer’s recommendations. Quantitative real-time PCR was performed using SYBR Green Taq ReadyMix™ (Sigma) and the data was normalised to a β-actin reference. Real-time PCR data was analyzed using the 2−ΔΔCt method [31] (link).
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6

Conjunctival Epithelial RNA Extraction and qPCR

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RNAs were extracted from conjunctival epithelial cells using TRI Reagent® (Sigma). Samples were reverse transcribed to complementary DNA using Tetro cDNA Synthesis Kit (Bioloine) or miRScript II RT kit (Qiagen) according to the manufacturer’s recommendations for gene and miR analysis respectively. Real-time quantitative PCR investigating gene expression was performed using primer sequences in Table 2 with SYBR Green Taq ReadyMix (Sigma) as per manufacturer’s recommendations. Data were analyzed using an ABI Prism 7900 system (Applied Biosystems). Genes were normalised to an RNU6B reference. miRs were normalised to the U6 small nuclear RNA (U6 snRNA). Real-time PCR data were analyzed using the 2-ddct method67 (link).

Real-time quantitative PCR primer sequences.

Gene/miRForward primerReverse Primer
miR-744-5pAAGGTGCGGGGCTAGGGCTAAAGTAAGGTTGAGGTTA
Pellino3GATGGCCTGATGGATGGACTGAGGTCGATGAGAGAGCCGTC
Rantes (CCL5)CCTCGCTGTCATCCTCATTGCTTACTCCCGAACCCATTTCTTCTC
CXCL10GGAAGCACTGCATCGATTTTGCAGAATCGAAGGCCATCAAGA
CK18GGCATCCAGAACGAGAAGGAGATTGTCCACAGTATTTGCGAAGA
CK19ACCAAGTTTGAGACGGAACAGCCCTCAGCGTACTGATTTCCT
RNU6BCTCGCTTCGGCAGCACAAACGCTTCACGAATTTGCGT
18 sGGGAGGTAGTGACGAAAAATACCAACAAAATAGAACCGCG
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7

Quantitative RT-PCR for Gene Expression Analysis

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RNA was extracted from cell cultures using Trizol™ (Sigma) and reverse transcribed to complementary DNA using the GoScript Reverse Transcription kit (Promega), as per manufacturer’s instructions. Real-time quantitative PCR investigating gene expression was performed using primers listed in Table 1, with SYBR Green Taq ReadyMix (Sigma) according to manufacturer’s recommendations. Data were analyzed using an ABI Prism 7900 system (Applied Biosystems) and were normalized to 18 s RNA. Real-time PCR data were analyzed using the 2−ΔΔct method70 (link).

Human primers used in this study.

Primer NamePrimer SequenceProduct Size(bp)
La senseGAAGGAGAGGTGGAAAAAG372
La anti-senseAAGCCCCGCAAACAAAAG
IFN-β senseCTAGCACTGGCTGGAATGAGA217
IFN-β anti-senseCTGACTATGGTCCAGGCACA
18 S senseTTGACGGAAGGGCACCACCA131
18 S anti-senseGCACCACCACCCACGGAATCG
IFN-λ1 senseGGACGCCTTGGAAGAGTCACT84
IFN-λ1 anti-senseAGAAGCCTCAGGTCCCAATTC
CXCL-10 senseGGAAGCACTGCATCGATTTTG519
CXCL-10 anti-senseCAGAATCGAAGGCCATCAAGA
CXCL-11 senseGCCTTGGCTGTGATATTGTGTG686
CXCL-11 anti-senseCACTTTCACTGCTTTTACCCCAG
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8

Quantitative Real-Time PCR of RNA Transcripts

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Total RNA was extracted from cell cultures using an RNeasy kit (Qiagen) and reverse transcribed to cDNA using Omniscript reverse transcriptase (Qiagen) according to manufacturer's recommendations. Quantitative real-time PCR was performed using SYBR Green Taq ReadyMix (Sigma) on an Applied Biosystems 7500 real-time PCR machine and the data was normalised to an 18S RNA reference. IFN-β, TRIM68 and 18S RNA templates were amplified using primers (sequences available on request) with an annealing temperature of 56°C. Real-time PCR data was analysed using the 2−ΔΔCt method [33] (link).
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9

Quantifying Gene Expression in Nasopharyngeal Carcinoma

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Total RNA was extracted from NPC tissues and cells using TRIzol® reagent (Invitrogen; Thermo Fisher Scientific, Inc.). Then, cDNA was established from total RNA using the PrimeScript™ 1st strand cDNA Synthesis Kit (cat. no. 6110A; Takara Biotechnology Co., Ltd.) according to the manufacturer's protocol. qPCR was performed using SYBR Green Taq ReadyMix (Sigma-Aldrich; Merck KGaA) on an Applied Biosystems 7500 Real-Time PCR System (Applied Biosystems; Thermo Fisher Scientific, Inc.). The following thermocycling conditions were used for qPCR: Initial denaturation at 95°C for 15 sec; 40 cycles of denaturation at 94°C for 30 sec, annealing at 60°C for 20 sec and extension at 72°C for 40 sec. The expression of genes was detected using the 2−ΔΔCq method (28 (link)). GAPDH or U6 were used as the internal controls for FBXL19-AS1 and PBOV1 or miR-431, respectively. The primer sequences were as follows: FBXL19-AS1 forward, 5′-GGTACAACTACGGATATGA-3′ and reverse, 5′-TACGTCTCGACCATTACGCA-3′; miR-431 forward, 5′-TGTCTTGCAGGCCGTCATG-3′ and reverse, 5′-GCTGTCAACGATACGCTACCTA-3′; PBOV1 forward, 5′-TGAGTCCCCTCTCGGTAATG-3′ and reverse, 5′-GCCCCGAGTTAAGAACATCA-3′; GAPDH forward, 5′-ACCACAGTCCATGCCATCAC-3′ and reverse, 5′-TCCACCACCCTGTTGCTGTA-3′; and U6 forward, 5′-ATTGGAACGATACAGAGAAGATT-3′ and reverse, 5′-GGAACGCTTCACGAATTTG-3′.
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