The LDH-Cytotoxicity Colorimetric Assay Kit II (#K313-500, BioVision, USA) was used to detect cell injury. The experimental steps were strictly performed according to the manufacturer’s manual. Briefly, medium solution (10 μl per well) was added to each neuronal culture well of a 24-well plate in an optically clear 96-well plate. Then, 100 μl of LDH Reaction Mix was added to each well, mixed, and incubated for 30 min at room temperature. The absorbance at 450 nm was measured with a microplate reader (Infinite M200, TECAN).
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