SLC16A2 and Allan-Herndon-Dudley syndrome: Mutations in TH transporters like MCT8 (SLC16A2), and OATP1C1 (SLCO1C1) cause juvenile neurodegeneration and brain developmental disease, Allan-Herndon-Dudley syndrome. oatp1c1 (slco1c1) knockout zebrafish also showed a similar phenotype [115, 116].