SOX2 and Guillain-Barre syndrome: In particular, Sox2+/Ki67+ proliferating NSCs were significantly reduced upon GBS infection (number of cells per section; 4.9 ± 0.58 in saline group vs. 3.08 ± 0.31 in GBS group; n = 8 mice per group; p = 0.016; Figure 3a,b).