Mitochondrial Dna Depletion Syndrome 4a, also known as alpers syndrome, is related to mitochondrial dna depletion syndrome and polg-related disorders, and has symptoms including ataxia, myoclonus and vomiting. An important gene associated with Mitochondrial Dna Depletion Syndrome 4a is POLG (DNA Polymerase Gamma, Catalytic Subunit), and among its related pathways/superpathways are tRNA Aminoacylation and Mitochondrial complex IV assembly. The drugs Prednisolone and Prednisolone acetate have been mentioned in the context of this disorder. Affiliated tissues include liver and cortex, and related phenotypes are spasticity and ataxia