Publication protocol
Single cells from injured muscles were obtained by enzymatic digestion of the tissue with collagenase type IV (Sigma Aldrich) (0.5 mg/ml) and dispase (Invitrogen) (3.5 mg/ml) at 37°C for 40 min. CD3+ cells were then isolated by magnetic sorting (CD3ε MicroBead Kit, Milteniy) following manufacturer’s instruction. Isolated CD3+ cells were lysed in RIPA buffer and protease inhibitors cocktail (Sigma Aldrich). Lysates were cleaned by centrifugation at 16,000 x g for 5 min at 4°C. For Western blot analysis, equal amounts of protein (20 μg) were resolved by SDS polyacrylamide gel electrophoresis and transferred onto Immobilon-P (Millipore). Antigens were detected using mouse anti-FOXP3 (1:500, clone 150D, Biolegend), rat anti-RORγT (1:250, clone B2D, eBioscience), mouse anti-GATA3 (1:200, clone HG3-31, Santa Cruz biotec), mouse anti-TBET (1:200, clone 4B10, Santa Cruz biotec), mouse monoclonal anti-β-actin (1:10000, clone AC15, Sigma Aldrich). All antibodies were diluted in TBST containing 5% non-fat milk. Incubation was performed 2 hours at room temperature for primary antibodies and 1 hour at room temperature for second step reagents. Primary antibodies were revealed with HRP-conjugated secondary antibodies (1:1000, GE Healthcare Europe GmbH) and a chemiluminescence kit (ECL, western blotting detection reagents, GE Healthcare Europe GmbH). When necessary, membranes were stripped with 0.1N NaOH for 10 min at room temperature.
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