RTN4 and Behcet disease: Immunofluorescence staining results demonstrated that treatment with BD and BD+ antagonist significantly reduced the expression levels of synaptic‐plasticity‐related proteins (Nogo‐A, NgR, RhoA, AGG, and CRMP2) compared to their levels in the model group, in the peri‐infarct brain tissue (p < 0.01; Figure 6).