Nine days after treatment with sera, Schwann cell cultures were fixed with 4 % PFA for 15 min, permeabilized with 0.2 % Triton X-100, and incubated with fluorescein-labeled phalloidin (P5282, Sigma) or primary antibody against S100 antibody (Sigma, 1:500) overnight at 4 °C. Cells were incubated with respective secondary antibody to tag S100. Cell nuclei were stained with Hoechst dye. Images of Schwann cells were acquired using a Keyence BZ9000 fluorescence microscope.
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