Document Detail


Inborn errors of ketogenesis and ketone body utilization.
MedLine Citation:
PMID:  21479626     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Ketone bodies acetoacetate and 3-hydroxy-n-butyric acid are metabolites derived from fatty acids and ketogenic amino acids such as leucine. They are mainly produced in the liver via reactions catalyzed by the ketogenic enzymes mitochondrial 3-hydroxy-3-methylglutary-coenzyme A synthase and 3-hydroxy-3-methylglutary-coenzyme A lyase. After prolonged starvation, ketone bodies can provide up to two-thirds of the brain's energy requirements. The rate-limiting enzyme of ketone body utilization (ketolysis) is succinyl-coenzyme A:3-oxoacid coenzyme A transferase. The subsequent step of ketolysis is catalyzed by 2-methylactoacetyl-coenzyme A thiolase, which is also involved in isoleucine catabolism. Inborn errors of metabolism affecting those four enzymes are presented and discussed in the context of differential diagnoses. While disorders of ketogenesis can present with hypoketotic hypoglycemia, inborn errors of ketolysis are characterized by metabolic decompensations with ketoacidosis. If those diseases are considered early and appropriate treatment is initiated without delay, patients with inborn errors of ketone body metabolism often have a good clinical outcome.
Authors:
Jörn Oliver Sass
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-4-9
Journal Detail:
Title:  Journal of inherited metabolic disease     Volume:  -     ISSN:  1573-2665     ISO Abbreviation:  -     Publication Date:  2011 Apr 
Date Detail:
Created Date:  2011-4-11     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7910918     Medline TA:  J Inherit Metab Dis     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Zentrum für Kinder- und Jugendmedizin, Labor für Klinische Biochemie und Stoffwechsel, Universitätsklinikum Freiburg, Mathildenstr. 1, 79106, Freiburg, Germany, joern.oliver.sass@uniklinik-freiburg.de.
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