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Viia7 real time pcr machine

Manufactured by Thermo Fisher Scientific
Sourced in United States, United Kingdom, India

The ViiA7 real-time PCR machine is a laboratory instrument used for the amplification and detection of nucleic acid sequences in real-time. It is designed to perform quantitative polymerase chain reaction (qPCR) analysis.

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112 protocols using viia7 real time pcr machine

1

Gene Expression Analysis of Stem Cell Markers

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TEC RNA was extracted using the RNeasy Micro Kit (QIAGEN, Germany). RNA was stored at −80°C until use. Reverse transcription of mRNA was performed with the High Capacity Reverse Transcription Kit (Applied Biosystems). Real‐time PCR for Oct4, Foxn1, and Dll4 was performed with Fast SYBR Green Master Mix (Applied Biosystems) using the Viia‐7 Real‐Time PCR machine (Applied Biosystems). The following primers were used: GAPDH (5′‐ACGGCAAATTCAACGGCACAG‐3′ fwd, 5′‐ACACCAGTAGACTCCACGACATAC‐3′ rev); Oct4 (5′‐ACATCGCCAATCAGCTTGG‐3′ fwd, 5′‐AGAACCATACTCGAACCACATCC‐3′ rev); Foxn1 (5′‐CTCGTCGTTTGTGCCTGAC‐3′ fwd, 5′‐TGCCTCTTGTAGGGGTGGAAA‐3′ rev); and Dll4 (5′‐AGGTGCCACTTCGGTTACAC‐3′ fwd, 5′‐GGGAGAGCAAATGGCTGATA‐3′ rev). For Dll1, AIRE, and PSMB11 RT‐PCR was performed using TaqMan Gene expression Assays (Applied Biosystems) and the EagleTaq Universal Master Mix (Roche). All PCR reactions were performed in MicroAmpOptical 96‐well reaction plates (Applied Biosystems) in a final volume of 20 μl and run on the Viia‐7 Real‐Time PCR machine (Applied Biosystems). Relative quantification of genes was performed with the 2−ΔΔCt method, normalized to GAPDH and expressed as fold change relative to the untransduced sample used as control.
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2

Neutrophil Gene Expression Analysis

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Total RNA was isolated from neutrophils using miRVANA kit (Thermofischer Scientific, Waltham, MA, USA, #AM1560). cDNA was prepared from RNA using High-Capacity cDNA Kit (ABI, Thermo Fisher Scientific, Waltham, MA, USA, #4368813). mRNA expression of genes like DNAJC13, TMSB4X, AHSG, ATG5, ATG12, HMGB1, and HIF-1α were analyzed. The primer sequences of the genes are listed in Supplementary Table S5. 18s RNA served as endogenous control for normalization. Relative expression was analyzed using SYBR Green (Thermofischer Scientific, Waltham, MA, USA, #A25742) in a VIIA7 real-time PCR machine (ABI, Whitefield, Bangalore, India).
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3

Quantifying Steroidogenic Gene Expression

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RNA was extracted from cell pellets using TRIzol following Invitrogen′s TRIzol RNA isolation protocol. Invitrogen M-MLV and random hexamers were used to convert the RNA to cDNA. The following primers were used: SRD5A1 (forward) 5′-ACGGGCATCGGTGCTTAAT-3′, (reverse) 5′-CCAACAGTGGCATAGGCTTTC-3′; STAR (forward) 5′-GCCCATGGAGAGGCTCTATG-3′, (reverse) 5′-TTCCACTCCCCCATTGCTT-3′; HSD3B2 (forward) 5′-CGGGCCCAACTCCTACAAG-3′, (reverse) 5′-TTTTCCAGAGGCTCTTCTTCGT-3′; RDH5 (forward) 5′-GCCCGCCAGCAATGC-3′, (reverse) 5′-CGCCCAAAGCCTGAGTCA-3′; HSD17B3 (forward) 5′-TGGGACAGTGGGCAGTGA-3′, (reverse) 5′-CGAGTACGCTTTCCCAATTCC-3′; HSD17B6 (forward) 5′-ACTGCTGCCTGGTCTGCAAAGA-3′, (reverse) 5′-GAGCCACATAGTGAGGGTGCTTCC-3′; AKR1C1 (forward) 5′-GGAGGCCGTGGAGAAGTGTA-3′, (reverse) 5′-GTTGGACACCCCGATGGA-3′; AKR1C3 (forward) 5′-GGAGAAGTGTAAAGGATGCAGGATT-3′, (reverse) 5′-GTACTTGAGTCCTGGCTTGTTGAG-3. Roche SYBR green master mix was used with cDNA and primers for PCR on an ABI Viia7 real time PCR machine. Data were normalized to the level of GAPDH per sample. Primers were purchased from Integrated DNA Technologies.
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4

Gene Expression Analysis of MDSCs

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FACS-sorted MDSCs and adherent monocytes were used to isolate total RNA using a miRVANA kit (Thermo Fisher, #AM1560). cDNA was prepared using a High-Capacity cDNA Kit (ABI, Thermo Fisher Scientific, Waltham, MA, USA; #4368813). The expression of various genes like IL-10, iNOS, and Arginase1 was checked. The primer sequence genes are listed in Supplementary Table 3. 18S RNA served as an endogenous control for normalization. Relative expression was analyzed using SYBR Green (Thermo Fisher, # A25742) in a VIIA7 real-time PCR machine (ABI, Whitefield, India).
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5

Quantifying HIV-1 mRNA Expression

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HIV-1 mRNA was extracted from 0.2mL of supernatant from five million cultured rCD4s after 18 h of LRA treatment using the ZR-96 Viral RNA kit (Zymo Research). cDNA synthesis was performed using qScript cDNA Supermix (Quanta Biosciences). Real-time PCR was performed using TaqMan Fast Advanced mastermix (Applied Biosystems) on an ABI Viia 7 Real-Time PCR machine. Primers and probes listed below. Manufacturer’s thermal cycling conditions were used. Molecular standard curve was generated as described above.
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6

Quantifying HIV-1 mRNA Expression

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HIV-1 mRNA was extracted from 0.2mL of supernatant from five million cultured rCD4s after 18 h of LRA treatment using the ZR-96 Viral RNA kit (Zymo Research). cDNA synthesis was performed using qScript cDNA Supermix (Quanta Biosciences). Real-time PCR was performed using TaqMan Fast Advanced mastermix (Applied Biosystems) on an ABI Viia 7 Real-Time PCR machine. Primers and probes listed below. Manufacturer’s thermal cycling conditions were used. Molecular standard curve was generated as described above.
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7

Validating miRNA and mRNA Expression

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To validate miR expression data, two step qRT-PCR, cDNA synthesis and real-time PCR amplification was performed. Minimum of 1–2 μg of total RNA was reverse transcribed by using Universal cDNA synthesis kit (Exiqon, USA) and specific miRs primers (Exiqon San Francisco, USA). Further miR PCR Kit (Exiqon, USA) amplification was performed in Roche RT-PCR machine. 5S-rRNA was used as an endogenous control for normalization.
To validate mRNA expression, qRT-PCR was performed in triplicate in ViiA7 real-time PCR machine (ABI, Whitefield, Bangalore, India) using Syber Green (Sigma, St. Louis, MO, USA) with specific primers for genes (Table 1). 18sRNA served as endogenous control for normalization. Relative quantification of miR and each gene was determined by calculating the Log RQ of each sample’s Ct value.
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8

Quantitative Real-Time PCR for OPXV Detection

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Samples were tested for presence of viral DNA using primers and probes complementary to the conserved OPXV E9L gene [25 (link)]. Each sample was run in duplicate on a 96 well plate alongside controls using an ABI Viia7 Real Time PCR machine. A standard curve of purified MPXV DNA (1ng– 10fg) was run alongside samples to allow for quantification of viral DNA within tissues. Samples were considered positive if the CT value was less than or equal to 39. This assay has a limit of detection of 50 fg for viral DNA in tissue samples.
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9

Optimizing PCR Amplification for Library Preparation

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To determine the number of additional cycles of PCR amplification to perform, 5 µL of purified library from on-bead PCR, 6 µL 2x NEBNext High Fidelity master mix, 0.5 µL 10 µM Universal primer, 0.5 µL 10 µM indexing primer, and 0.33 µL 33x SYBR Green were mixed and added to a qPCR well and cycled on an ABI ViiA 7 Real-Time PCR Machine with the following parameters (1 cycle: 98 °C for 30 s; 25 cycles: 98 °C for 10 s, 65 °C for 75 s). The number of off-bead PCR cycles to perform was determined by finding the number of cycles such that the fluorescence intensity is about one-third of the plateau intensity at the PCR saturation. The remaining 25 µL of the library was combined with 30 µL 2x NEBNext High Fidelity master mix, 2.5 µL 10 µM universal Primer, and 2.5 µL 10 µM indexing primer. Each sample was then cycled as above for the number of cycles determined by the side qPCR.
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10

Quantitative PCR Analysis of BCAA Metabolizing Enzymes

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mRNA levels of BCAA metabolizing enzyme related genes in SAT and AA tissues were measured by quantitative PCR by employing optimal reference gene pairs which was validated as previously described (39 (link)). Primer information used for the study are provided in Table 8. Powdered tissue samples were homogenized in Ribozol (N580-CA, Amresco, OH, USA). RNA was isolated as per the manufacturer's instructions and QIAxcel Advanced System (Qiagen, Toronto, ON) was used to determine the RNA quality and quantity. One microgram of RNA of was used to synthesize cDNA using qScript cDNA supermix (CA101414-104, Quanta Biosciences). qPCR analysis was performed using PerfeCTa SYBR green Supermix Low ROX (Quanta Biosciences, MA, USA) and a ViiA7 real-time PCR machine (Thermo Fisher Scientific, CA, USA) as detailed previously (39 (link)). qBase + software (Biogazelle) was used to quantify mRNA expression (39 (link)).
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