BDNF and Parkinson disease: Ahmadian et al. (2018) even described significantly higher striatal BDNF levels in rats of the 6-OHDA-lesioned group than in the sham group. Our observations are also consistent with findings in the hippocampus of another model of PD in rats (Savall et al., 2023). In this study, they describe stimulation of the pro-BDNF/p75 NTR pathway without modulation of BDNF levels after exposure to MPTP.