Mitochondrial DNA and Disease

Abstract
The mitochondrial encephalomyopathies are a diverse group of disorders that result from the structural, biochemical, or genetic derangement of mitochondria.1 Since mitochondrial dysfunction can affect virtually all organ systems (Figure 1), physicians in many specialties see patients with mitochondrial diseases. Despite a bewildering array of clinical manifestations (Table 1 and Table 2) and variations in the mode of onset, course, and progression of disease, many mitochondrial disorders share prominent systemic effects (Table 2) that contribute to their morbidity.Our understanding of the role of mitochondrial DNA in certain diseases has evolved rapidly since 1988, when the first mutations in mitochondrial DNA were . . .