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8 protocols using fastpure total rna isolation kit

1

In Vitro Transcription and Northern Blot of Ribozymes

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For IVT RNAs, the expression unit in the pRAP expression
construct, from the T7 promoter to the terminator, was PCR amplified
and used as a template for IVT according to the standard protocol.
For in vivo RNAs, total RNAs were extracted from E.
coli
cells with the FastPure Total RNA Isolation Kit
(Vazyme). The cells were transformed with the pRAP co-expression vector
and induced with IPTG for at least 2 h before being harvested for
RNA isolation. For Northern blotting, total RNAs (2 μg per lane)
or IVT RNAs (0.1 μg per lane) were subjected to 1.2% formaldehyde
agarose gel electrophoresis. The RNAs were then transferred to the
nylon membrane and cross-linked to the membrane using a UV transilluminator
(254 nm). The membrane with immobilized RNAs was then incubated in
a 20 mL hybridization buffer containing 0.25 pmol/mL biotin-labeled
DNA probes (5′-biotin-GCTATTTTTGCGGGCTTGTAACCGCCCTCGGC-3′)
that targets the twister ribozyme. The biotin-labeled probes were
detected using a Chemiluminescent Nucleic Acid Detection Module Kit
(Thermo Scientific, USA). The results were visualized using the ChemiDoc
Touch imaging system (Bio-Rad).
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2

Quantifying ACRBP Expression in Ovarian Cancer

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Total RNA was extracted from OC tissues, normal ovarian tissues, and OC cells by using a Fast Pure Total RNA Isolation Kit (Vazyme Biotech Co., Ltd.) following the manufacturer's protocol. cDNA was then synthesized using a Revert AidTM First‐Strand cDNA Synthesis Kit (MBI Fermentas). qRT‐PCR was performed using SYBR Green PCR Master Mix (Applied Biosystems) following the manufacturer's instructions. Glyceraldehyde 3‐phosphate dehydrogenase (GAPDH) was used as an internal control. ACRBP mRNA level was analyzed via the 2ΔΔCt method and expressed as fold change compared with GAPDH. The primer sequences are as follows:
ACRBP: Forward, 5′‐CAGTGACAGAACGCCAGACCTTC‐3′,
Reverse, 5′‐CCTTGCTCCTGCTTGTGCTCTG‐3.
GAPDH: Forward, 5′‐GCACCGTCAAGGCTGAGAAC‐3′,
Reverse, 5′‐TGGTGAAGACGCCAGTGGA‐3′.
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3

Transcriptome Analysis via RT-PCR

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Reverse-transcription PCR (RT-PCR) was conducted to assess the consistency between MATS results and their corresponding DAS events. Total RNA was extracted using FastPure total RNA isolation kit (RC411, Vazyme Biotech Co., Ltd. (Nanjing, China)) according to the manufacturer’s protocol. RT-PCR was performed using bulked RNA from exactly the same samples prepared for PacBio sequencing to maintain consistency. RNA was reverse transcribed using Takara (Takara Biomedical Technology, Beijing, China) PrimeScript RT reagent kit. The primers for each gene were designed by Primer Premier 6.0. Same PCR reactions were used for all thermal profiles: 95 °C for 5 min, followed by 35 cycles at 95 °C for 20 s, 55 °C for 30 s, 72 °C for 45 s, and then 72 °C for 5 min. PCR products were separated into a 1.5% agarose gel.
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4

RNA Extraction and Real-Time PCR Analysis

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Total RNA was extracted using the FastPure total RNA isolation kit (Vazyme Biotech Co., Nanjing, China) and reverse-transcribed to complementary DNA using HiScript III All-in-one RT SuperMix (Vazyme Biotech Co, Nanjing, China), according to the manufacturer’s instructions. Real-time PCR was performed with SYBER Green PCR Master Mix (Vazyme Biotech Co, Nanjing, China) using a StepOnePlus PCR system (Applied Biosystems, Foster City, CA, USA). Glyceraldehyde-3-phosphate dehydrogenase (GAPDH) was used as an internal normalizer. Primer sequences are noted in the Supplementary materials. Western blot was used to measure α-SMA expression levels in CFs. The primary antibodies were anti-α-SMA (Abcam, Cambridge, UK) and anti–β-tubulin (ABclonal, Wuhan, China).
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5

Isolation and Transcriptional Analysis of Gastric Cancer TAMs and CD8+ T Cells

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TAMs and tumour‐infiltrating CD8+ T cells were isolated from fresh gastric cancer tissues by human CD14 and CD8 nanobeads (MojoSort, BioLegend), respectively. Total RNA from TAMs, tumour‐infiltrating CD8+ T cells and AGS cell line was extracted by FastPure Total RNA Isolation Kit (Vazyme Biotech). RNA quantity and quality were determined with use of DS‐11 Spectrophotometer (DeNovix). RNA was transcribed into cDNA by PrimeScript RT reagent Kit (TaKaRa). Quantitative polymerase chain reaction (qPCR) was performed on QuantStudio5 (Applied Biosystems) with use of SYBR Green dye (TaKaRa). The primers used in this study were also listed (Table S4). At least three independent experiments were repeated for one sample. Relative transcript levels were estimated by means of ΔΔCt method.
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6

Comprehensive Transcriptomic Analysis of Litsea chinense

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We collected samples of shoot, leaf, bud, stigma, stamen, sepal, petal and six embryonic development stages (callus, globular embryo, heart-shaped embryo, torpedo embryo, early cotyledon embryo, cotyledon embryo) of L. chinense. Tissue samples were taken from the adult trees of L. chinense in Nanjing Forestry University (Nanjing, China). Total RNA extraction was performed using a FastPure Total RNA Isolation Kit from Vazyme (Nanjing, China) (RC401) corporation. In this study, we set three biological replicates for each group of samples, and three technical replicates for each biological replicate [70 (link)]. All primers for qRT-PCR were designed by Primer3.0 and are listed in Table S5. All experiments were run on 96-well plates. All data generated from qRT-PCR were calculated by the 2−△△CT formula. ACT97 was selected as the internal reference gene, one-way analysis of variance was performed using IBM SPSS Statistics 26, and GraphPad Prism 9 was used to draw the histogram.
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7

Quantitative RNA Expression Analysis

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We used the FastPure total RNA isolation kit (Vazyme, Nanjing, China, RC101) to extract total RNA. PrimeScriptTM RT kits were used to reverse-transcribed, and TB GreenTM Ex TaqTM kits were used to execute the qRT-PCR. RT-PCR was performed using a Light Cycler480 II instrument (Roche, Germany). lncRNAs and mRNAs were normalized using the expression of GAPDH, and the relative RNA levels were analyzed by2-ΔΔCT method. Gene-specific primer sequences of genes (Sparkjade, China) were designed and listed that in Table 1.
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8

Quantifying PBK mRNA Expression in Ovarian Cancer

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Total RNA was extracted from OC cell lines and tissues using a Fast Pure Total RNA Isolation Kit (Vazyme Biotech Co., Ltd, USA) following the manufacturer's instructions. cDNA was synthesized using a RevertAidTM First-Strand cDNA Synthesis Kit (MBI Fermentas, Canada). qRT-PCR was performed using SYBR Green PCR Master Mix (Applied Biosystems, Foster City, CA, USA) according to the manufacturer's protocol on a LightCycler480II Real-Time PCR System (Roche, Switzerland). GAPDH was used as an endogenous control. Relative mRNA level of PBK was analyzed by comparison CT (2 -ΔΔct ) method and expressed as fold change compared with GAPDH. The primer sequences are as follows: PBK: Forward 5'-TTACTTTGTGGGAAATGATGACTTTAT-3', Reverse 5'-CATTAGTGCATACAGAGAAGAGTTCAA-3'.
GAPDH: Forward 5'-GCACCGTCAAGGCTGAGAAC-3', Reverse 5'-TGGTGAAGACGCCAGTGGA-3'.
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