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Rneasy lipid tissue

Manufactured by Qiagen
Sourced in Germany

The RNeasy Lipid Tissue Kit is a laboratory product designed for the isolation and purification of total RNA from lipid-rich tissues. It utilizes a silica-membrane-based technology to efficiently capture and purify RNA molecules from the sample, while removing contaminants and inhibitors.

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8 protocols using rneasy lipid tissue

1

Extraction and Quantification of RNA

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Total RNA was isolated using the RNeasy Kit (Qiagen) according to the manufacturer’s instructions. For isolating RNA from WAT, an RNeasy Lipid Tissue (Qiagen) was used. cDNA was synthesized using the iScript cDNA Synthesis Kit (Bio-Rad), and quantitative PCR (qPCR) was performed in triplicates using the SYBR Green PCR Master Mix Kit (Applied Biosystems).
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2

Analyzing Adipogenesis Gene Expression

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Total RNA was obtained from frozen tissues, as previously described [36 (link)], using RNeasy Lipid Tissue (Qiagen, Hilden, Germany), according to the manufacturer’s instructions. Gene expression analysis levels were determined using the relative expression method with the threshold crossing point (Ct-value), as described [26 (link),30 (link),37 (link)].
PCR arrays for the RT2 Profiler™ PCR Array Mouse Adipogenesis (Qiagen, product no. 330,231 and Cat. No. PAMM-049Z) were performed following the manufacturers’ protocol. Gene expression levels were calculated using the ΔΔCt method after normalization to the housekeeping gene expression and determination of the fold change. Each GeneQuery™ plate contains eight controls, five target housekeeping genes (β-actin, GAPDH, LDHA, NONO, and PPIH), and genes encoding for pre-adipocyte cell markers, proliferation, differentiation and adipogenesis, lipid metabolism, and obesity. Gene expression is presented as the log10 of mean values (n = 3 in each group), as previously described [26 (link),40 (link),41 ] (https://CRAN.R-project.org/package=gplots, accessed on 4 March 2022).
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3

RNA Extraction from Adipose and Muscle

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Total RNA was extracted from WAT and the gastrocnemius muscle using RNeasy Lipid Tissue and RNeasy Plus Universal Mini Kits (QIAGEN, Valencia, CA, USA) according to manufacturer’s instructions. Total RNA was extracted from skeletal muscle myocytes using RNAiso and amplified using CellAmp Whole Transcriptome Amplification Kit Version 2 (Takara Bio Inc., Shiga, Japan).
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4

Quantitative Gene Expression Analysis in Adipose Tissue

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Total RNA was extracted from 3T3 cells using TRIzol® (Ambion, Austin, TX) and from frozen adipose tissue by RNeasy® Lipid Tissue (Qiagen), as per instructions provided by the manufacturers. RNA was determined by measuring the absorbance at 260 nm (A260) with a Biotek™ plate reader and the Take3™ plate (Biotek, Winooski, VT), and assessed by the A260/A280 ratio. cDNA was synthesized from total RNA using the High Capacity cDNA Reverse Transcription Kit (Applied Biosystems), after real-time PCR was performed using TaqMan® Fast Universal Master Mix (2x), on a 7500 HT Fast Real-Time PCR System (Applied Biosystems). Specific TaqMan Gene Expression Assays probes for mouse HO-1, PGC1α, UCP1, COX-IV (cytochrome c oxidase subunit-IV), adiponectin, TNFα, IL-6, Mfn1, Mfn2, Drp1, Fis1, OPA1, aP2, SIRT3, C/EBPα, and GAPDH were used as previously described [33 (link)].
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5

Quantitative RT-PCR of Inflammatory Genes

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Total RNA was isolated using the commercial kits RNeasy Plus (QIAGEN, Valencia, CA) for liver and RNeasy Lipid Tissue (QIAGEN) for white adipose tissue. Reverse transcription with 1 μg of RNA was carried out in an Eppendorf Mastercycler (Hamburg, Germany) using a high capacity cDNA reverse transcription kit (ABI, Foster City, CA). Primer annealing was done at 25°C for 10 min, followed by elongation at 37°C for 2 h and inactivation of the enzyme at 85°C for 5 min. Negative controls (no added transcriptase) were performed in parallel. qRT-PCR for the genes Cd68, Ly6g, tumor necrosis factor (Tnf), interleukin-1β (Il1b), interleukin-1α (Il1a), interferonγ (Ifng), and glyceraldehyde 3-phosphate dehydrogenase (Gapdh) was performed in triplicate in a 7500 Fast Real-Time PCR System (ABI). The primers in Table 1 were employed and purchased from Integrated DNA Technologies (Coralville, IA). qRT-PCR was carried out using Power SYBR Green Master Mix (ABI). Taq polymerase was activated at 95°C for 10 min. The cycling parameters were denaturation at 95°C for 30 sec and extension at 60°C for 1 min (for 40 cycles). Data analysis was performed using the 2−ΔΔCT method for relative quantification. All samples were normalized to Gapdh.
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6

Quantitative Gene Expression Analysis of Hypothalamic Samples

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RNA was extracted from the hypothalamus (RNeasy® Lipid Tissue, Qiagen, Hilden, Germany). Quantitative polymerase chain reaction (RT-qPCR) was performed using exon–exon boundary-spanning primer sequences (see below) and the SYBR Green methodology on a Step One Plus sequence amplification system (Applied Biosystems, Foster City, CA, USA). The relative mRNA expression of the tested gene normalized to Gapdh expression was calculated using the ΔΔCt method.
The primers were as follows: Negr1 forward/reverse: ATGTGACGCAGGAGCACTT/CCATACTGGGCTGTACTTGGA [85 (link)]; Lsamp forward/reverse ATCACCAGGGAACAGTCAGG/TCCCGGTACCACTCAAAGTC [67 (link)]; Adam10 (QT00106351, Qiagen, Hilden, Germany).
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7

Quantifying Gene Expression in Adipose Tissue

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Total RNA of adipose tissue was obtained using RNeasy lipid tissue (Qiagen, Hilden, Germany). cDna was synthesized using a high-capacity cDNA reverse transcription kit (Thermo Fisher Scientific, Waltham, MA, USA). PCRs were performed with a Bio-Rad CFX96 Connect real-time PCR system instrument and software (Bio-Rad Laboratories srl, Milan, Italy), as previously reported [21 (link)]. Each cDNA sample (500 ng) was mixed with 2× QuantiTech SYBRGreen PCR Master Mix (Qiagen, Hilden, Germany,) and validated primers (Appendix A, Table A1). Data were normalized to Actb for BAT and Rn18S for scWAT as a housekeeping gene, and the data were analyzed according to 2−ΔΔCt method.
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8

RNA Extraction and RT-qPCR Analysis Protocol

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Total RNA was extracted from WAT specimens (300 mg) using RNeasy Lipid tissue (Qiagen, Hilden, Germany) according to the manufacturer’s recommendations. Total RNA from samples obtained in in vitro experiments was extracted using NucleoSpin RNA II kit (Macherey-Nagel, Düren, Germany) according to the manufacturer’s instructions. RNA concentration as well as purity was measured using a Nanodrop ND-1000 Spectrophotometer (Thermo Fisher Scientific) and high quality RNA was confirmed using the Agilent 2100 Bioanalyzer (Agilent Technologies, Palo Alto, CA, USA). Reverse transcription was performed using the iScript cDNA synthesis kit (Qiagen) and random hexamer primers (Invitrogen, Carlsbad, CA). Quantitative real-time PCR was performed using commercial TaqMan probes (Applied Biosystems). Gene expression was normalized to the internal reference gene LRP10. Relative expression was calculated using the 2[-Delta Delta C(T)] method [21 (link)].
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