CD38 and Parkinson disease: Given that CD38 function is implicated in PD (Zhou et al. 2023), astrocyte function (Hattori et al. 2017; Hayakawa et al. 2016), cADPR‐induced inflammation (Wei et al. 2014), and NAD‐related bioenergetics (Lautrup et al. 2019), we sought to cross‐reference our DEG findings with available datasets.