SLC11A2 and Parkinson disease: Our previous study and others have confirmed that increased iron levels were associated with increased expression of iron importer divalent metal transporter 1 (DMT1) and decreased expression of iron exporter ferroportin1 (FPN1) in PD animal and cell models (Salazar et al., 2008; Wang et al., 2009; Jiang et al., 2010).