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Rna lysis buffer

Manufactured by Bio-Rad
Sourced in United States

The RNA lysis buffer is a reagent used in molecular biology techniques to isolate and purify RNA from biological samples. It functions by disrupting cell membranes and denaturing proteins, allowing for the release and stabilization of RNA molecules. The buffer is a crucial component in the RNA extraction and purification process.

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4 protocols using rna lysis buffer

1

RNA Extraction and RT-qPCR Analysis

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Fresh or frozen IECs were resuspended in RNA lysis buffer (Biorad). For total tissues, 1 cm pieces were homogenized in RNA lysis buffer (Biorad) or TRizol (Invitrogen). Accordingly, total RNA was extracted using Aurum Total RNA mini kit (Biorad) or using chloroform followed by RNeasy mini kit (Qiagen) purification. RNA was quantified by SpectraMax iD5 or NanoDrop. 500 ng of RNA was reversed transcribed using iScript cDNA synthesis kit (Biorad). Real-time PCR was performed using SYBR green supermix (Biorad) and detected on a CFX96 system (Biorad). For TNFΔARE samples, real-time PCR was performed using PowerUP SYBR green master mix (Applied Biosystems) on a QuantStuidio 6 (Applied Biosystems). Primers were ordered from Integrated DNA Technologies. Primer sequences are listed in Table 2. Relative expression was determined by 2−dCt using Gapdh or Cdh1 as reference genes.
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2

Hypoxic Cell Culture Protocol

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Inflatable hypoxic chambers were adapted and modified from a published study47 (link), using sterile 4.5 mm heat-sealable pouches (VWR, USA). Briefly, culture dishes were placed inside pouches and the open end was heat-sealed to close. Two corners were then cut on a 45° angle just large enough to allow a 5 mL serological pipette fitted to flexible tubing (and attached to mixed air tank) to be inserted in one corner. The second corner was left open to allow air to exit the pouch as it was flushed with 1% oxygen mix. Pouches were flushed with 1% mixed air for approximately 3 minutes at which point the open corner was heat sealed. The pouch was then inflated to ~80% capacity at which point the remaining open corner was sealed and the chamber was placed in the tissue culture incubator. Individual chambers were made to allow for collection of cells after 2, 4, and 6 days and filled with mixed air containing 1% oxygen, 5% CO2, and N2 balanced (Airgas, USA). Cells were collected for RNA in RNA lysis buffer (Aurum, BioRad, USA), or were fixed in 4% paraformaldehyde (Sigma, USA), for 20 minutes at room temperature.
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3

Hypoxic Cell Culture Chambers

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Inflatable hypoxic chambers were adapted and modified as previously published15 (link),121 (link), using sterile 4.5 mm heat-sealable pouches (VWR, USA). Individual chambers were made to allow for collection of cells after 2, 4, and 6 days and filled with mixed air containing 1% oxygen, 5% CO2, and N2 balanced (Airgas, USA). Cells were collected for RNA in RNA lysis buffer (Aurum, BioRad, USA), or were fixed in 4% paraformaldehyde (Sigma, USA), for 20 minutes at room temperature.
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4

Transcriptional Analysis of Perineal Tissue

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For transcriptional analysis studies, samples of perineal or foreskin tissues were taken by punch biopsy on the first day, on day four, or day 20 after lesions first became visible on the perineum (5 animals per time point). Tissue samples from the perineum and foreskin of uninfected animals (N=5 animals) were collected in parallel for comparison. All samples were placed into 0.4 ml of Dulbecco’s Modified Eagle Medium (Corning Life Sciences-Mediatech, Inc., Manassas, VA) with 2.0% newborn calf serum (Life Technologies Incorporated, Carlsbad, CA) and 1.0% penicillin/streptomycin (Sigma-Aldrich, St. Louis, MO) and an equal volume of RNA lysis buffer (Bio-Rad, Hercules, CA) was added. Samples were frozen at −80°C prior to preparation of cDNA as described previously (Veselenak et al., 2018 (link)). Transcriptional analysis was performed as described previously (Veselenak et al., 2015 (link); Veselenak et al., 2018 (link)) for 44 immune-related genes and 4 housekeeping genes. New primers used in the current study and not described previously are listed in Table 4. Comparisons to identify significant changes in gene expression levels between tissue samples from uninfected and samples from each time point p.i. were calculated using Student’s t test with a p value cutoff of 0.05.
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