SEMA6A and Stroke: Sema6a, the mRNA of which we found to be upregulated 1.5-fold 4 weeks after stroke, was recently found to have a growth-promoting effect on PC12 cells (Tian et al., 2017) and is important for the correct wiring of the CST during development (Faulkner et al., 2008; Rünker et al., 2008).