Dichloroacetate Therapy Attenuates the Blood Lactate Response to Submaximal Exercise in Patients with Defects in Mitochondrial Energy Metabolism

• Published in: The journal of clinical endocrinology and metabolism 2004-04, Vol.89 (4), p.1733-1738
• Main Authors: Duncan, G. E., Perkins, L. A., Theriaque, D. W., Neiberger, R. E., Stacpoole, P. W.
• Format: Article
• Language: English
• Subjects: Adult; Biological and medical sciences; Child; Child, Preschool; Dichloroacetic Acid - therapeutic use; Endocrinopathies; Energy Metabolism - drug effects; Exercise; Feeding. Feeding behavior; Female; Fundamental and applied biological sciences. Psychology; Humans; Lactic Acid - blood; Male; Medical sciences; Middle Aged; Mitochondria - metabolism; Mitochondrial Diseases - drug therapy; Mitochondrial Diseases - metabolism; Oxygen Consumption - drug effects; Vertebrates: anatomy and physiology, studies on body, several organs or systems; Vertebrates: endocrinology
• ISSN: 0021-972X; 1945-7197
• DOI: 10.1210/jc.2003-031684

We determined acute and chronic effects of dichloroacetate (DCA) on maximal (MAX) and submaximal (SUB) exercise responses in patients with abnormal mitochondrial energetics. Subjects (n = 9) completed a MAX treadmill bout 1 h after ingesting 25 mg/kg DCA or placebo (PL). A 15-min SUB bout was completed the next day while receiving the same treatment. After a 1-d washout, MAX and SUB were repeated while receiving the alternate treatment (acute). Gas exchange and heart rate were measured throughout all tests. Blood lactate (Bla) was measured 0, 3, and 10 min after MAX, and 5, 10, and 15 min during SUB. MAX and SUB were repeated after 3 months of daily DCA or PL. After a 2-wk washout, a final MAX and SUB were completed after 3 months of alternate treatment (chronic). Average Bla during SUB was lower (P < 0.05) during both acute (1.99 ± 1.10 vs. 2.49 ± 1.52 mmol/liter) and chronic (1.71 ± 1.37 vs. 2.39 ± 1.32 mmol/liter) DCA vs. PL despite similar exercise intensities between conditions (∼75 and 70% maximal exercise capacity during acute and chronic treatment). Thus, although DCA does not alter MAX responses, acute and chronic DCA attenuate the Bla response to moderate exercise in patients with abnormal mitochondrial energetics.