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5 protocols using cfx opus 96 system

1

Quantitative mRNA Expression Analysis

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Total RNA was isolated and extracted using TRIzol (Life Technologies, Carlsbad, CA) RNA was quantified for purity (2.0–2.1 A260/A280 ratio) and quantity using a NanoDrop Lite spectrophotometer (Thermo Scientific, Waltham, MA). RNA was then reverse transcribed to 0.5–2ug of complementary DNA (cDNA) using high capacity cDNA reverse transcription kit (Applied biosystems, #4374966, Waltham, MA). Real-time PCR results were obtained using the CFX Opus 96 system an iQ SYBR Green Supermix (Biorad, Hercules, CA) with 4ng of cDNA template and the final primer concentration was 0.5 uM. Expression levels were quantitated and normalized to GAPDH. The following primers were used for amplification of target cDNA: TNF-α, 5’ TGA GGT ACA GGC CCT CTG AT 3’ and 5’ CTC GAA CCC CGA GTG ACA AG 3’; IL-8, 5’ GGC CGT GGC TCT CTT GGC AG 3’ and 5’ TGT GTT GGC GCA GTG TGG TCC 3’; GAPDH, 5’ TCA AGG CTG AGA ACG GGA AG 3’ and 5’ CGC CCC ACT TGA TTT TGG AG 3’.
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2

Quantifying Hypoxia-Responsive Genes by qRT-PCR

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Total RNA was isolated using the NucleoSpin RNA kit (740955.250, Macherey-Nagel, Düren Germany) according to the manufacturer’s instructions. Complementary DNA (cDNA) was synthesized from 500 ng total RNA using M-MLV reverse transcriptase (M1705, Promega, Walldorf, Germany) and oligo dT primer. Quantitative Real-Time PCR (qRT-PCR) was performed with a Biozym Blue S’Green master mix (331416XL, Biozym Scientific, Hessisch Oldendorf, Germany) on a BioRad CFX Opus 96 System. Relative expression levels were calculated with the ΔΔct method using hypoxanthine-guanine phosphoribosyltransferase (HPRT) as a reference gene. The following primer pairs were used: HIF1A 5′-GGATGCTGGTGATTTGGATA-3′ (forward) and 5′-TCATGGTCACATGGATGAGTA-3′ (reverse); HIF2A 5′-CGGAGGTGTTCTATGAGCTGG-3′ (forward) and 5′-AGCTTGTGTGTTCGCAGGAA-3′ (reverse); CA9 5′-CACGTGGTTCACCTCAGCAC-3′ (forward) and 5′-CAGCGATTTCTTCCAAGCG-3′ (reverse); HPRT 5′-CCTGGCGTCGTGATTAGTGA-3′ (forward) and 5′-CGAGCAAGACGTTCAGTCCT-3′ (reverse).
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3

RNA Extraction and qPCR Analysis

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Cell pellets were immediately processed using the NucleoSpin RNA Plus XS kit (Macherey-Nagel) or the RNAeasy kit (Quiagen) as per manufacturer’s instructions. 1μg eluted RNA was reverse transcribed into cDNA using the High-Capacity cDNA Reverse Transcription Kit (Thermo-Fisher). Quantitative polymerase chain reactions were performed using Applied Biosystems Fast SYBR Green Master Mix (Applied Biosystems) on a CFX Opus 96 system (BioRad). HPRT1 was used as a house-keeping gene and the 2−ΔΔCT method to calculate differences in RNA levels.
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4

Quantitative Real-Time PCR Assay

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Total RNA was extracted from VSMCs or vascular tissues following the TRIzol extraction protocol (Invitrogen). Equal amounts of RNA were reverse transcribed into cDNA using the Prime Script RT Reagent Kit (TAKARA, Dalian, China). qRT-PCR amplification was performed with the THUNDERBIRD® Next SYBR qPCR Mix (TOYOBO, Osaka, Japan) on a CFX Opus 96 system (Bio-Rad, CA, USA). The mRNA levels were normalized to those of GAPDH. Data were analyzed using CFX Maestro qPCR analysis software version (V2.3). The primer sequences are listed in Supplementary Table S1.
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5

Quantifying Gene Expression in Cells

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Total RNA was isolated using TRIzol (Life Technologies, Carlsbad, CA) and quantified using a NanoDrop Lite spectrophotometer (Thermo Scientific, Waltham, MA). RNA was reverse transcribed to 0.5–2μg of cDNA using the high capacity cDNA reverse transcription kit (Applied biosystems, #4368814, Waltham MA). Real time PCR results were obtained using the CFX Opus 96 system and iQ SYBR Green Supermix (BioRad, Hercules, CA) with 4ng of cDNA template and a 0.5μM final primer concentration. Expression levels were quantitated using the 2−ΔΔCT method and normalized to GAPDH. The following primers were used for amplification of target cDNA: HIF1-α, 5’ TTCACCTGAGCCTAATAGTCC 3’ and 5’ CAAGTCTAAATCTGTGTCCTG 3’; TNF-α, 5’ CTCGAACCCCGAGTGACAAG 3’ and 5’ TGAGGTACAGGCCCTCTGAT 3’; IL-8, 5’ GGCCGTGGCTCTCTTGGCAG 3’ and 5’ TGTGTTGGCGCAGTGTGGTCC 3’; occludin, 5’ TCAGGGAATATCCACCTATCACTTCAG 3’ and 5’ CATCAGCAGCAGCCATGTACTCTTCAC 3’; claudin-1, 5’ TGAGGATGGCTGTCATTGGG 3’ and 5’ AAAGTAGGGCACCTCCCAGA 3’; claudin-3, 5’ GCCACCAAGGTCGTCTACTC 3’ and 5’ CCTGCGTCTGTCCCTTAGAC 3’; claudin-4, 5’ GGCCGGCCTTATGGTGATAG 3’ and 5’ AGTAAGGCTTGTCTGTGCGG 3’; ZO-1, 5’ AGGGGCAGTGGTGGTTTTCTGTTCTTT 3’ and 5’ GCAGAGGTCAAAGTTCAAGGCTCAAG 3’; GAPDH, 5’ ACCACAGTCCATGCCATCAC 3’ and 5’ TCCACCACCCTGTTGCTGTA 3’. Data shown are fold changes of target gene compared to GAPDH.
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