Fig. 1From: Letter to the editor on: prophylactic nicotinamide treatment protects from rotenone-induced neurodegeneration by increasing mitochondrial content and volumeComparison of nicotinamide level detected after a metabolomic approach [6] in the plasma of healthy controls (CTRL), asymptomatic OPA1 pathogenic variants carriers (Asym), and patient with isolated (DOA) or syndromic (DOA+) forms. * p < 0.05; *** p < 0.001Back to article page