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6 protocols using rat il 10

1

Liver Tissue Cytokine Extraction and Quantification

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The extraction method of liver tissues was described by Chen et al. [58 (link)]: 0.5 g of liver tissues was homogenized in 1.5 mL of ice-cold buffer containing 50 mM Tris (pH 7.2), 150 mM NaCl, 1% Triton X-100, and 0.1% protease inhibitor (PI) (HYK0010, MedChemExpress, Monmouth Junction, NJ, USA). The homogenized solution was then centrifuged at 3000 rpm for 15 min at 4 °C, and the supernatant was collected. Concentrations of hepatic TNF-α, IL-1β, IL-6, and IL-10 were determined by corresponding enzyme-linked immunosorbent assay (ELISA) kits, including rat TNF-α (BioLegend Systems, San Diego, CA, USA), IL-1β (Rat IL-1, R&D Systems, Minneapolis, MN, USA), IL-6 (Rat IL-6, R&D Systems) and IL-10 (Rat IL-10, R&D Systems, Minneapolis, MN, USA). The OD was read at 450 nm with a microplate reader (Molecular Devices, Sunnyvale, CA, USA) for all cytokines.
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2

Cytokine Profiling in Cell Culture

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Cell culture supernatants (48-hours) were analyzed in duplicate by ELISA using kits: PGE2 (multi-species), rat IL-1RA, rat IL-10 (R&D Systems, Minneapolis, MN); FGF7/KGF (BlueGene, Shanghai); MPO (RayBioTech, Norcross, GA); TSG6 (MyBiosource, San Diego, CA). Other cytokines were evaluated on a Luminex (Austin, TX) using rat-specific bead sets: FasL, G-CSF, GM-CSF, IFNγ, IL-4, IL-12p40&p70, LIX, RANTES (Millipore, Billerica, MA); PAI-1, CXCL1, TNFα, IL1α, IL-2, IL-4, IL-6 (R&D Systems).
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3

Microglial Phenotypical Changes Induced by Cytokines

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To investigate the phenotypical changes of microglia, MG d14 were pre-treated with 10 ng/mL GMCSF (R&D Systems, Minneapolis, MN, USA) for 5 days and then incubated with the following cytokines for 3 days: 10 ng/mL GMCSF (R&D systems, Minneapolis, MN, USA), 100 nM Substance P (SP, Sigma, St. Louis, MO, USA), 10 ng/mL rat IL-4 (R&D systems, Minneapolis, MN, USA), 10 ng/mL rat IL-10 (R&D systems, Minneapolis, MN, USA), 10 ng/mL TNF-α (Sigma, St. Louis, MO, USA), and 20 ng/mL IFN-γ (R&D systems, Minneapolis, MN, USA).
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4

Multiplex Cytokine and Chemokine Analysis

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A total of 50 μl of tissue sonicates, serum, or cell culture supernatants were used for the assays. Protein levels in serum samples were analyzed on multiplex ELISA cytokine (IFNγ, LOD: 25 pg/ml; IL-1β, LOD: 6.25 pg/ml; IL-2, 3.125 pg/ml; IL-6, LOD: 4.165 pg/ml; IL-10, LOD: 3.125 pg/ml; CXCL1, LOD: 0.781 pg/ml; TNF, LOD: 25 pg/ml) and chemokine arrays (CCL2, LOD: 1.172 pg/ml; CCL3, LOD: 0.293 pg/ml; CXCL2, LOD: 0.391 pg/ml; CCL20, LOD: 6.25 pg/ml) (Aushon, CA, USA). Chemiluminescence was quantified on a Signature-PLUS CCD (Aushon) and analyzed using PROarray Analyst Software (Aushon). Protein levels in tissue sonicates and cell culture supernatants were determined using ELISA kits for rat IL-1β (R&D Systems, Minneapolis, MN; LOD: 5 pg/ml), rat IL-10 (R&D Systems; LOD: 10 pg/ml), rat BDNF (Promega Corporation, Madison, WI; LOD: 15.6 pg/ml), and rat CCL2 (R&D Systems; LOD: 15.6 pg/ml). The assays were performed according to manufacturer's instructions. The analyte concentrations are presented as picograms per 100 μg of total protein.
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5

Inflammatory Response to Rapamycin

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To test the inflammatory response after rapamycin treatment, colorimetric ELISA kits were used to detect the following cytokines in serum and brain protein extract: rat IL-10, rat interferon (IFN)-γ, and rat TGF-β (all R&D Systems, USA). For each ELISA analysis, 40 μl of sample was used without dilution in accordance with the manufacturer's instructions.
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6

Formation of Crosslinked Microgels via Microfluidics

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Microgels were formed via water-in-oil emulsion using a microfluidic device with parallel flow-focusing particle generators as previously described[40 (link),46 ]. The aqueous phase (1 mL) consisted of NorHA (30 mg, 3% w/v), thiol crosslinker (pentaerythritol tetrakis(mercaptoacetate), PETMA, TCI Chemicals or 1,4-dithiothreitol (DTT)) at 0.95 mol thiol per 1 mol norbornene, Irgacure-2959 (I2959, 0.05% w/v), HepSH (0.05 mol thiol per 1 mol norbornene), and (if indicated) rat IL-10 (R&D Systems, 12 μg) and was attached to an in-line 0.22 μm filter with a flow rate of 0.6 mL/hr. For visualization purposes, if indicated, fluorescein isothiocyanate-dextran (FITC-dextran, 2 MDa, 1 mg) or fluorescent peptide (GCDDD-5(6)-carboxyfluorescein, 0.05 mol thiol per 1 mol norbornene) was incorporated in the aqueous solution. The oil phase consisted of 2% w/w Span 80 in mineral oil and was filtered using a 0.45 μm filter prior to use at a flow rate of 3.5 mL/hr. Microgels were crosslinked via UV light (OmniCure Series 1500, Excelitas, 320–390 nm, 20 mW/cm2 ) as they flowed out of the device and into a collection vial. Microgels were washed with water and then isopropanol to remove oil, dried overnight on vacuum, and stored at −20°C.
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