HAMP and Parkinson disease: Zip14, Tfrc, Dmt1, Ftl, Fth, and Hamp mRNAs were also elevated in neurons isolated from the brainstem of hA53T transgenic mice, a model of hereditary PD (Figure S3A), and neurons isolated from the SN of 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-injected mice, a model of toxin-mediated PD (Figure S3B).