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9 protocols using sybr fast qpcr kit master mix 2 universal

1

Quantification of PAR1 and PAR2 Expression

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TRIZOL reagent was used to extract total RNA, and the cDNA Synthesis Kit from Yeasen Biotech was used to synthesize first-strand cDNA, following the manufacturer's instructions. RT-PCR was performed using the SYBR FAST qPCR Kit Master Mix (2×) Universal (Kapa Biosystems) on the ABI 7500 Real-time PCR Instrument (Life Technologies, CA, USA) in a 20 μl system. In addition, the SYBR FAST qPCR Kit Master Mix (2×) Universal (Kapa Biosystems) was utilized to perform RT-PCR on the ABI 7500 Real-time PCR Instrument (Life Technologies, CA, USA) in a 20 μl system. A total of 6 control samples and 8 UPJ samples were employed for RT-PCR. The following PCR primers were used: PAR1fw: 5′- TGCCTACTTTGCCTACCTCC -3′, PAR1rv: 5′- GTAGACGTACCTCTGGCAC -3′, PAR2fw: 5′- GCGATCTTCTGCCATGGATG -3′, PAR2rv: 5′- AGATCAGGTACATGGCCAGG -3′, GAPDHfw: 5′- GGAGTCAACGGATTTGGT -3′, GAPDHrv: 5′- GTGATGGGATTTCCATTGAT -3′. The relative changes in the expression levels of PAR1 and PAR2 were normalized against the levels of GAPDH gene expression in each sample using the ΔΔCt method. Each sample and primer were subjected to triplicate experiments. Furthermore, the relative mRNA expression levels of PAR1 and PAR2 in different Onen grades of preoperative hydronephrosis were investigated to explore their clinical implications.
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2

RT-PCR for Gene Expression Analysis

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RT-PCR was performed as previously described5 (link). For standard RT-PCR, total RNA was reverse transcribed with random hexamers for 1 h using AMV-RT (New England Biolabs), M-MLV RT (Promega) or Superscript III (Invitrogen). Strand-specific RT-PCR was performed using Superscript III RT (Invitrogen) or M-MLV RT (Promega). PCR was carried out using the resulting cDNA. For quantitative PCR (qPCR), SYBR Fast qPCR kit master mix (2×) universal (Kapa Biosystems, USA) was used with addition of ROX reference dye high and carried out on the Applied Biosystems 7900HT Fast Real-Time PCR system. Oligo sequences were reported previously5 (link). DIP1 Fw: 5′ TAATACGACTCACTATAGGGAGAAAGAAGTTGCGACAGAACCG 3′ and DIP1 Rv: 5′ TAATACGACTCACTATAGGGAGACGAACAGCTTGTAGATGGCA 3′. CamKII INE-1 Fw TGGGCTATTTTTAGGCGTCA, CamKII INE-1 Rv TATGAACGCGTCGATCTCAG, ey INE-1 Fw CGGAAAATGCCAAGGACTAA, ey INE-1 Rv GCTAAATGGGCACACTCGTC, INE-1 Fw GGCCATGTCCGTCTGTCC, INE-1 Rv AGCTAGTGTGAATGCGAACG, rox1 forward TGCAGTGGCAGTTTCTTCTG, rox1 reverse GGTCCGTGCAAAGCAGTAAT, rox2 forward TCTCCGAAGCAAAATCAAGC, rox2 reverse TGTTGCGTTCCAAGACACAT.
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3

Transcriptional Analysis of Plant Cotyledon Development

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The cotyledons and first true leaves of 9110Gt and 9110G were flash frozen in liquid nitrogen and used for total RNA extraction using TRIzol® (Thermo Fisher Scientific, Waltham, MA, USA). RNA was pretreated with RNase-free DNase I (Takara, Shiga, Japan), and first-strand cDNA was synthesized from 1.0 μg total RNA using reverse transcriptase SYBR FAST qPCR Kit Master Mix (2×) Universal (KAPA Biosystems, Wilmington, MA, USA).
Quantitative real time PCR (qPCR) was performed in a total volume of 10.0 μL which contained 1.0 μL of first-strand cDNA, 5.0 μL SYBR FAST qPCR Kit Master Mix, 0.4 μL gene-specific primers (10 μM·μL−1), 0.2 μL ROX reference dye, and 3.4 μL ddH2O. Reactions were amplified in a ABI prism 7900 HT Real-Time PCR System with following conditions: pre-incubation at 95 °C for 3 min; 40 cycles of 95 °C for 30 s, 60 °C for 20 s; melting curves 95 °C for 15 s, 60 °C for 15 s, and 95 °C for 15 s. The 2ΔΔCt method [66 (link)] was used to calculate relative changes in gene expression. All runs had three technical replicates and three biological replicates.
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4

Diapause-Induced Gene Expression Profiling

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Seven up-regulated genes and 1 down-regulated gene that were expressed during diapause were validated and quantified via real-time PCR, with three biological replicates and three technical replications. The total RNA was extracted with TRIzol reagent (Life Technologies, Carlsbad, CA, USA) for the different developmental stages (non-diapause, diapause and diapause-terminated). The diapause stage was divided into 6 phases, D1, D2, D3, D4, D5 and D6, representing diapause after 10, 20, 30, 40, 50, and 60 days, respectively. Then, 1 μg of RNA was employed for first-strand cDNA synthesis using the Prime ScriptII 1st Strand cDNA Synthesis Kit (Takara, Dalian, China) according to the manufacturer’s protocol. Real-time PCR was conducted using SYBR FAST qPCR Kit Master Mix (2×) Universal (KAPA Biosystems, Woburn, MA, USA) under the following conditions: 95 °C for 5 min, followed by 40 cycles of 95 °C for 30 s and 60 °C for 20 s. The melting curve was analyzed from 60 °C to 95 °C to detect nonspecific product amplification. The 18S-RNA gene of C. septempunctata L. was used as an internal gene. The primers used for real-time PCR are listed in Additional file 6. All of the data obtained through qRT-PCR were analyzed via the 2-ΔΔCT method.
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5

Quantifying miR-122 Expression by RT-qPCR

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miR-122 expression was measured by reverse transcription-PCR according to the TaqMan microRNA Assay protocol (Bio Miao Biological Technology (Beijing) Co.,Ltd.). RNAs were extracted with TRIZOL reagent (Invitrogen, CA, USA) following the manufacturer's instructions were reverse-transcribed using a PrimeScript II 1st Strand cDNA Synthesis Kit ( TAKARA). The expression level of mature miR-122 was examined using SYBR FAST qPCR Kit Master Mix(2×) Universal (KAPA Biosystems), and the comparative Ct method comparing to the transcription level of U6 RNA was used to calculate the expression levels.
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6

Cardiac Gene Expression Analysis

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Total RNA from 50 mg of myocardial tissue was extracted with a TRIzol reagent kit (Thermo Fisher Scientific, Beijing, China) according to the manufacturer’s instructions. Reverse transcription was then performed using TIANScript RT Kit (Tian Gen Biotech, Beijing, China), also according to the manufacturer’s instructions. Subsequent PCR of the cDNA was performed with the following oligonucleotide primer sequences (synthesized by Sai Baisheng Biotechnology; Beijing, China): ghrelin-S, 5′-TTGAGCCCAGAGCACCAGAAA-3′; ghrelin-A, 5′-AGT TGCAGAGGAGGCAGAAGCT-3′; osteopontin-S, 5′-CTCGCGGTGAAAGTGGCTGA-3′; osteopontin-A, 3′-GACCTCAGAAGATGAACTCT-5′; endothelin-S, 5′-GGTCTTGATGCTGTTGCTGA-3′; endothelin-A, 5′-GAGCTGAGAAGGAAGTGCAGA-3′; β-actin-S, 5′-ATCTGGCACCACACCTTC-3′; and β-actin-A, 5′-AGCCAGGTCCAGACGCA-3′ (as internal control sample loading). Each PCR tube contained SYBR FAST qPCR Kit Master Mix (2×) Universal (KAPA Biosystems, Sigma-Aldrich Corp., St. Louis, MO, USA) in a reaction volume of 25 µl, and PCR was performed using a Leopard Scientific Instruments (Beijing, China) model L9600B thermocycler. The PCR products were separated on a 1.5% agarose gel, and stained with ethidium bromide. The ratio of optical densities of osteopontin, ET and ghrelin mRNA to β-actin were measured using the Gel Documentation System (Bio-Rad, Hercules, CA).
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7

Differential Expression Analysis of Bacterial Genes

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300 mg of tissue specimens was removed from the erector spinae of the animals. Using Trizol (Invitrogen) according to the manufacturer’s protocol, the supernatant was harvested for RNA extraction; the pellet was resuspended in 250 μg/mL lysostaphin (OMEGA), incubated at 37 °C for 15 min, then used for the bacterial RNA extraction. RNA was reverse transcribed into cDNA using the TIANScript RT Kit (TIANGEN). For quantitative analysis of the expression level of mRNAs, real time quantitative PCR analyses using SYBR FAST qPCR Kit Master Mix (2×) Universal (KAPA) were performed utilising an ABI7900HT sequence detection system (ABI). Cycling conditions were as follows: one cycle at 95 °C for 3 min; 40 cycles at 95 °C for 3 s, 60 °C for 20 s; and one dissociation step at 95 °C for 15 s, 60 °C for 15 s, and 95 °C for 15 s.
Expression of the bacterial genes were normalised against 16S rRNA expression, to get ΔCt. All samples were analysed in triplicate and the 2-ΔΔCt method was used to calculate gene expression. The results were expressed as the fold change of the different genes compared with the housekeeping gene.
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8

Quantitative RT-PCR Protocols Across Disciplines

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For standard RT-PCR, total RNA was reverse transcribed for 1 h using AMV-RT (New England BioLabs) or M-MLV RT (Promega) with random hexamers. The cDNA was then used for PCR. For strand-specific RT-PCR, the one-step RT-PCR kit (QIAGEN) was used. RT was performed with a single primer, followed by PCR with both primers at 40 cycles. PCR products were visualized on 1%–2% agarose gels. For qPCR, SYBR Fast qPCR kit master mix (2×) universal (Kapa Biosystems) with addition of ROX reference dye high was used with the Applied Biosystems 7900HT Fast Real-Time PCR system.
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9

Intestinal Gene Expression Analysis

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The jejunum, ileum, and colon were harvested after sacrifice and frozen at −80°C. Total RNA was isolated from the rat intestinal tissues with TRIzol reagent (15596026, Invitrogen, Carlsbad, CA, USA) and subjected to quantitative polymerase chain reaction (qPCR) with SYBR FAST qPCR Kit Master Mix (2×) Universal (KAPA Biosystems, USA). The thermal cycling conditions were as follows: 95°C for 10 min, 45 cycles at 95°C for 10 s and 59°C for 60 s, followed by 95°C for 15 s, 72°C for 15 s, and 95°C for 15 s. The mRNA expression levels of zonula occludens-1 (ZO-1), occludin, and claudin-1 were quantitatively analyzed and normalized to Gapdh levels. The forward and reverse primer sequences were as follows: ZO-1 forward 5′-GAGCAAGCCTCCTGCACATA-3′, reverse 5′- TCAGTTTCGGGTTTCCCCTT-3′; occludin forward 5′-CAACGGCAAAGTGAATGGCA-3′, reverse 5′-CTTTCCCCTTCGTGGGAGTC-3′; claudin-1 forward 5′-TGGGGACAACATCGTGACTG-3′, reverse 5′-CCCCAGCAGGATGCCAATTA-3′; Gapdh forward 5′-TGTGAACGGATTTGGCCGTA-3′, reverse 5′-GATGGTGATGGGTTTCCCGT-3′.
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