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6 protocols using all in one mirna qrt pcr detection kit 2

1

Modulating miR-98-3p in Hematopoietic Stem Cells

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1) Overexpression of MiR98-3p mimic in LSK cells: LSK cells were sorted by flow cytometry. The LSK cells were recovered and incubated overnight, then transfected with control or miR98-3p mimics by using lipofectamine 3000. Additionally, after 36h incubation, LSK cells were collected and transfected with control or miR98-3p mimics. CAFC assay, western-blot, or qPCR were conducted as described above. 2) Inhibition of miRNA-98-3p using antagonist in LSK cells. To achieve the loss-of-function of miRNA-98-3p, the antagomir of mir-98 (MNM03274) was designed and synthesized with chemical modification by Applied Biological Materials (abm) Inc. Flow cytometry sorted LSK cells from male and female Lxn−/− mice were recovered with cytokines including 100 ng/mL FMS-like tyrosine kinase-3 ligand, 50 ng/mL mouse stem cell factor, 10 ng/mL interleukin-3, and 10 ng/mL IL-6 in StemSpan SFEM (STEMCELL Technologies) for 2 h at 37°, 5% CO2. Then cells were continued to be cultured and treated with or without mir-98 antagomir (500nM) for 24 h. Cells were then collected for microRNA and protein isolation. MicroRNA was isolated by using RNeasy Micro Kit (Qiagen); cDNA synthesis and qPCR were performed with All-in-One miRNA qRT-PCR Detection Kit 2.0 (Genecopoeia). Protein expression of THBS1 was determined by Western blot analysis, as described above.15 (link)
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2

Comprehensive miRNA and Cytokine Analysis

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Total RNA was isolated using the MiFure Cell/Tissue miRMA Kit (Vazyme, China). miR-30c expression was reverse transcribed and detected according to All-in-One miRNA qRT-PCR Detection Kit 2.0 (GeneCopoeia, China) and U6 was used as endogenous controls. The expression levels of VIP, IL-1β, IL-6, IL-10, IL-12, IL-23, and TNF-α was measured using GAPDH as the reference gene by qRT-PCR (Applied Biosystems™ 7500, USA). Relative gene expression level was calculated by 2−ΔΔCt relative quantitative method. The primer sequences were listed in the Supplement Table S1.
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3

Quantitative Gene Expression Analysis

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Total RNA or miRNA from cells was extracted by Total RNA Purification Kit (17,200; NORGEN) or microRNA Purification Kit (21,300; NORGEN). The reverse transcription and qPCR process were completed in one step with the assistance of the TaqMan One Step RT‐qPCR Kit (T2210; Solarbio) or All‐in‐One miRNA qRT‐PCR Detection Kit 2.0 (QP115; GeneCopoeia). Glyceraldehyde‐3‐phosphate dehydrogenase (GAPDH) or U6 was employed as the reference gene as needed. The data were shown in real‐time PCR Detection system (CFX96; Bio‐rad). The primers are listed in Table 1. The relative expression was standardized using 2−ΔΔCq method.20
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4

Quantitative Analysis of miR-449a and NR4A2 Expression

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Total RNA was extracted using the TRIzol reagent (Invitrogen; Thermo Fisher Scientific, Inc.). To analyze miR-449a expression levels, reverse transcription was conducted using the All-in-One miRNA First-Strand cDNA Synthesis kit (GeneCopoeia, Inc.) and qPCR was performed with the All-in-One miRNA qRT-PCR Detection kit 2.0 (GeneCopoeia, Inc.). The thermocycling conditions were: 95˚C initial denaturation for 10 min, followed by 40 cycles of 95˚C denaturation for 10 sec, 60˚C annealing for 20 sec, and 72˚C extension for 10 sec. U6 served as the internal control for miR-449a. To analyze NR4A2 mRNA expression levels, FastStart Universal SYBR Green Master (ROX) kit (Roche Diagnostics) was used. A total of 1 µl of the enzyme mix was used for 25 µl of each RT-PCR reaction. The reverse transcription step was performed at 16˚C for 30 min without the RT-PCR enzyme mix, then at 42˚C for 40 min with the enzyme mix, followed by 30 cycles of amplification at 95˚C for 20 sec and 60˚C for 1 min. GAPDH served as the internal control for mRNA detection. qPCR was performed in an ABI 7300 thermocycler (Applied Biosystems; Thermo Fisher Scientific, Inc.) and the 2−ΔΔCq method (26 (link)) was used for quantification of the results. The primer sequences are listed in Table I.
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5

Modulating miR-98-3p in Hematopoietic Stem Cells

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1) Overexpression of MiR98-3p mimic in LSK cells: LSK cells were sorted by flow cytometry. The LSK cells were recovered and incubated overnight, then transfected with control or miR98-3p mimics by using lipofectamine 3000. Additionally, after 36h incubation, LSK cells were collected and transfected with control or miR98-3p mimics. CAFC assay, western-blot, or qPCR were conducted as described above. 2) Inhibition of miRNA-98-3p using antagonist in LSK cells. To achieve the loss-of-function of miRNA-98-3p, the antagomir of mir-98 (MNM03274) was designed and synthesized with chemical modification by Applied Biological Materials (abm) Inc. Flow cytometry sorted LSK cells from male and female Lxn−/− mice were recovered with cytokines including 100 ng/mL FMS-like tyrosine kinase-3 ligand, 50 ng/mL mouse stem cell factor, 10 ng/mL interleukin-3, and 10 ng/mL IL-6 in StemSpan SFEM (STEMCELL Technologies) for 2 h at 37°, 5% CO2. Then cells were continued to be cultured and treated with or without mir-98 antagomir (500nM) for 24 h. Cells were then collected for microRNA and protein isolation. MicroRNA was isolated by using RNeasy Micro Kit (Qiagen); cDNA synthesis and qPCR were performed with All-in-One miRNA qRT-PCR Detection Kit 2.0 (Genecopoeia). Protein expression of THBS1 was determined by Western blot analysis, as described above.15 (link)
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6

RNA Extraction and qRT-PCR Analysis

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Total RNA from the human clinical tissues and cultured cells was extracted using TRIzol® reagent according to the manufacturer's recommendations (Thermo Fisher Scientific, Inc.). Reverse transcription and detection of mRNA (Cyclin E and c-myc) was performed using BlazeTaq™ SYBR® Green qPCR mix 2.0 (GeneCopoeia, Inc.). RT-qPCR was performed to detect miR-3690 expression using the All-in-One™ miRNA qRT-PCR Detection kit 2.0 (GeneCopoeia, Inc, Guangzhou). Thermocycling conditions were as follows: At 95°C for 30 sec, followed by 40 cycles of amplification at 95°C for 5 sec, at 59°C for 30 sec and at 72°C for 30 sec. The following PCR primers were synthesized by GeneCopoeia, Inc.: miR-3690 (cat. no. HmiRQP1976), cyclin E (cat. no. HQP021819) and MYC (cat. no. HQP011597). U6 small nuclear RNA (cat. no. HmiRQP9001) and GAPDH (cat. no. HQP006940) were used as endogenous controls, and mRNA quantification was performed using the 2−ΔΔCq method (17 (link)).
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