Disease Directory Isovaleric Acidemia
Metabolic

Isovaleric Acidemia

Also known as: IVA, isovaleryl-CoA dehydrogenase deficiency, IVD deficiency, isovaleric acid CoA dehydrogenase deficiency

Prevalence

1-9 per 100,000 (Orphanet)

Onset

Neonatal, Infantile

Type

Autosomal recessive genetic

Gene

IVD

About Isovaleric Acidemia

Isovaleric acidemia is an organic acidemia caused by deficiency of isovaleryl-CoA dehydrogenase, an enzyme involved in leucine catabolism. Accumulation of isovaleric acid and its metabolites causes a distinctive 'sweaty feet' body odor and can lead to acute metabolic crises with vomiting, lethargy, and coma. The clinical spectrum ranges from severe neonatal-onset disease to a chronic intermittent form identified through newborn screening.

Common Clinical Features

Sweaty feet odor Metabolic crisis Vomiting and lethargy Hyperammonemia Neutropenia Thrombocytopenia Intellectual disability

Clinical Trial Eligibility Tips

What to know before applying to Isovaleric Acidemia trials.

Newborn screening identification versus symptomatic diagnosis affects disease severity and trial stratification

Plasma isovalerylcarnitine (C5) level is the primary biomarker — document newborn screening results if available

Glycine and carnitine supplementation history should be disclosed as it affects metabolite levels

Mild/asymptomatic newborn-screened patients may qualify for natural history studies rather than interventional trials

Patient Resources

Patient Organization

Organic Acidemia Association

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Orphanet

European reference resource for rare diseases (ORPHA:33)

View on Orphanet ↗

NORD

National Organization for Rare Disorders

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Find recruiting Isovaleric Acidemia trials

Search 500,000+ studies from ClinicalTrials.gov, filtered for Isovaleric Acidemia. Updated daily.

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