Upon completion of MS, NS-1 cells were fixed in 4% paraformaldehyde and processed for immunocytochemistry. After blocking in phosphate-buffered saline (PBS) supplemented with 2% Bovine Serum Albumin (BSA) and 0.1% Triton X-100, NS-1 cells were stained with HCS CellMask Red (0.5 μg/ml, Invitrogen, Eugene, OR) (Yeyeodu et al., 2010 (link)) followed by a DAPI-containing mounting medium. Images were captured with the QCapture Pro software and neurite lengths and number were measured using ImageJ.