WNT1 and Parkinson disease: Of specific interest, in MPTP‐aged mouse model of PD we found that such an age‐dependent Wnt1 down‐modulation of striatal astrocytes appeared to result from a dysfunctional astrocyte‐microglia crosstalk (see L'Episcopo et al., 2012, 2013, 2014b; L'Episcopo, Tirolo, Peruzzotti‐Jametti, et al., 2018a; L'Episcopo, Tirolo, Serapide, et al., 2018b).