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Genetics of Pyruvate Carboxylase Deficiency Medication

  • Author: Richard E Frye, MD, PhD; Chief Editor: Luis O Rohena, MD  more...
 
Updated: Feb 18, 2016
 

Medication Summary

Sodium dichloroacetate is a compound that is believed to activate the PDC by inhibiting the inactivating kinase, resulting in decreased lactate production and promotion of pyruvate oxidation.

Acute decompensation during illness in patients with PCD requires management of the acidosis with hydration and intravenous bicarbonate.

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Enzyme activator

Class Summary

Dichloroacetate (DCA) sodium is the only drug found to activate the enzyme complex.

Sodium dichloroacetate

 

Designated as an orphan drug in the United States. Used to treat lactic acidosis. This is a compound that is believed to activate the PDC by inhibiting the inactivating kinase, resulting in decreased lactate production and promotion of pyruvate oxidation.

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Alkalinizing agents

Class Summary

Sodium bicarbonate is used as a gastric, systemic, and urinary alkalinizer and has been used in the treatment of acidosis resulting from metabolic and respiratory causes, including diabetic coma, diarrhea, kidney disturbances, and shock. Sodium bicarbonate also increases renal clearance of acidic drugs.

Sodium bicarbonate

 

Bicarbonate can be used to correct the acidosis in chronic and acute settings.

Citrate solutions (Bicitra, Polycitra)

 

Several solutions containing citrate with sodium or potassium or both are available as alkalinizing agents. With normal hepatic function, 1 mEq of citrate is converted to 1 mEq of bicarbonate.

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Contributor Information and Disclosures
Author

Richard E Frye, MD, PhD Associate Professor, Department of Pediatrics, University of Arkansas for Medical Sciences

Richard E Frye, MD, PhD is a member of the following medical societies: American Academy of Neurology, Child Neurology Society, International Neuropsychological Society, American Academy of Pediatrics

Disclosure: Nothing to disclose.

Coauthor(s)

Paul J Benke, MD, PhD Director of Clinical Genetics, Joe DiMaggio Children's Hospital

Paul J Benke, MD, PhD is a member of the following medical societies: American Society of Human Genetics

Disclosure: Nothing to disclose.

Specialty Editor Board

Mary L Windle, PharmD Adjunct Associate Professor, University of Nebraska Medical Center College of Pharmacy; Editor-in-Chief, Medscape Drug Reference

Disclosure: Nothing to disclose.

Chief Editor

Luis O Rohena, MD Chief, Medical Genetics, San Antonio Military Medical Center; Assistant Professor of Pediatrics, Uniformed Services University of the Health Sciences, F Edward Hebert School of Medicine; Assistant Professor of Pediatrics, University of Texas Health Science Center at San Antonio

Luis O Rohena, MD is a member of the following medical societies: American Academy of Pediatrics, American Chemical Society, American College of Medical Genetics and Genomics, American Society of Human Genetics

Disclosure: Nothing to disclose.

References
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  18. Stacpoole PW, Barnes CL, Hurbanis MD. Treatment of congenital lactic acidosis with dichloroacetate [see comments]. Arch Dis Child. 1997 Dec. 77(6):535-41. [Medline].

  19. Ullrich K, Schmidt H, van Teeffelen-Heithoff A. Glycogen storage disease type I and III and pyruvate carboxylase deficiency: results of long-term treatment with uncooked cornstarch. Acta Paediatr Scand. 1988 Jul. 77(4):531-6. [Medline].

  20. Van Coster RN, Janssens S, Misson JP. Prenatal diagnosis of pyruvate carboxylase deficiency by direct measurement of catalytic activity on chorionic villi samples. Prenat Diagn. 1998 Oct. 18(10):1041-4. [Medline].

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This is a diagrammatic representation of the citric acid cycle and the abnormalities found in pyruvate carboxylase deficiency. The dotted line represents absent pathways. Pyruvate cannot produce oxaloacetate and is shunted to alternative pathways that produce lactic acid and alanine. The lack of oxaloacetate prevents gluconeogenesis and urea cycle function.
 
 
 
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