For tissue analysis, proteins were extracted from frozen organs using an ULTRA TURRAX T25 (Ika, Germany) and lysis buffer (25 mM Tris-Cl (pH 7.4), 100 mM NaCl, 1 mM EDTA, 1% Triton X-100, 0.5% Nonidet P40 and protease inhibitors (Roche Diagnostics, Meylan, France)). Protein concentration was evaluated by BCA assay (Sigma-Aldrich Chimie, Saint-Quentin Fallavier, France). 10 µg proteins were used to evaluate cytokine concentration using the same kit and apparatus as those used for blood cytokine analysis.
Quickplex sq 120 apparatus
The QuickPlex SQ 120 is a multiplex assay platform that enables the simultaneous detection and quantification of multiple analytes in a single sample. The apparatus utilizes electrochemiluminescence technology to provide accurate and sensitive measurements.
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3 protocols using quickplex sq 120 apparatus
Cytokine Quantification from Plasma and Tissue
For tissue analysis, proteins were extracted from frozen organs using an ULTRA TURRAX T25 (Ika, Germany) and lysis buffer (25 mM Tris-Cl (pH 7.4), 100 mM NaCl, 1 mM EDTA, 1% Triton X-100, 0.5% Nonidet P40 and protease inhibitors (Roche Diagnostics, Meylan, France)). Protein concentration was evaluated by BCA assay (Sigma-Aldrich Chimie, Saint-Quentin Fallavier, France). 10 µg proteins were used to evaluate cytokine concentration using the same kit and apparatus as those used for blood cytokine analysis.
Adipose Tissue Secretome Analysis
Leptin and cytokines were assayed using “Mouse Leptin Kit” (Meso Scale Discovery, # K152BYC) and “mouse V-PLEX Proinflammatory Panel 1 Kit” (Meso Scale Discovery, # K15048D) respectively, on a QuickPlex SQ 120 apparatus (Meso Scale Discovery) following manufacturer’s instructions. IL-1RA levels were assayed using mouse IL-1RA Elisa kit (#EMIL1RN) from Thermo Fisher Scientific (Courtaboeuf, France). Glycerol and triglycerides determinations were performed using dedicated kit (Free Glycerol reagent and Triglyceride reagent, Sigma Aldrich).
Adipose Tissue Secretome Analysis
Leptin was assayed using a mouse leptin kit (Meso Scale Discovery, # K152BYC), and cytokines were measured using a mouse V-PLEX pro-inflammatory panel 1 kit (# K15048D) according to the manufacturer's instructions using a QuickPlex SQ 120 apparatus (Meso Scale Discovery, Rockville, Maryland, USA). IL-1RA levels were assayed using a mouse IL-1RA
ELISA kit (#EMIL1RN) from Thermo Fisher Scientific (Courtaboeuf, France). Glycerol and triglyceride determinations were performed using a dedicated kit (free glycerol reagent and triglyceride reagent, Sigma Aldrich).
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