Isobutyryl-CoA dehydrogenase deficiency
General Information (adopted from Orphanet):
Synonyms, Signs: |
Acyl-CoA dehydrogenase family, member 8, deficiency of ACAD8 deficiency Isobutyric aciduria IBD deficiency |
Number of Symptoms | 14 |
OrphanetNr: | 79159 |
OMIM Id: |
611283
|
ICD-10: |
E71.1 |
UMLs: |
C1969809 |
MeSH: |
C535541 |
MedDRA: |
|
Snomed: |
445274004 |
Prevalence, inheritance and age of onset:
Prevalence: | No data available. |
Inheritance: |
Autosomal recessive 17304052 [IBIS] |
Age of onset: |
Infancy 9889013 [IBIS] |
Disease classification (adopted from Orphanet):
Parent Diseases: |
Classic organic aciduria
-Rare genetic disease Syndrome associated with dilated cardiomyopathy -Rare cardiac disease -Rare genetic disease |
Comment:
The hallmark of this defect in valine metabolism is an elevated intramitochondrial accumulation of isobutyryl-CoA that is shuttled outside the cell after esterification to isobutyrylcarnitine. The latter is detectable in plasma, urine, and blood spot samples as a C4-acylcarnitine that also represents an isomer, butyrylcarnitine, when analyzed using standard MS/MS-based procedures for acylcarnitine analysis. To date, 10 of the 13 isobutyryl-CoA dehydrogenase-deficient patients remain asymptomatic, two were lost to follow-up, and one patient required frequent hospitalizations due to emesis and dehydration but is developing normally at 5 years of age. Based on the newborn screening experience, the incidence of this autosomal recessive condition is at least 1:70,000 livebirths (PMID:17304052). |
Symptom Information:
|
(HPO:0002013) | Vomiting | 17304052; 12736383 | IBIS | 191 / 7739 | ||
|
(HPO:0002099) | Asthma | 12736383 | IBIS | 62 / 7739 | ||
|
(HPO:0001640) | Cardiomegaly | 9889013 | IBIS | 81 / 7739 | ||
|
(HPO:0001631) | Atria septal defect | 9889013 | IBIS | 274 / 7739 | ||
|
(HPO:0001644) | Dilated cardiomyopathy | 9889013 | IBIS | 141 / 7739 | ||
|
(HPO:0004969) | Peripheral pulmonary artery stenosis | 17304052; 16857760 | IBIS | 9 / 7739 | ||
|
(HPO:0003234) | Decreased plasma carnitine | 9889013 | IBIS | 9 / 7739 | ||
|
(HPO:0001903) | Anemia | 9889013 | IBIS | 289 / 7739 | ||
|
(HPO:0001944) | Dehydration | 17304052 | IBIS | 59 / 7739 | ||
|
(HPO:0012330) | Pyelonephritis | 12736383 | IBIS | 7 / 7739 | ||
|
(HPO:0001252) | Muscular hypotonia | 17304052; 15505379 | IBIS | 990 / 7739 | ||
|
(HPO:0011342) | Mild global developmental delay | 17304052; 15505379 | IBIS | 10 / 7739 | ||
|
(HPO:0000750) | Delayed speech and language development | 17304052; 16857760 | IBIS | 197 / 7739 | ||
|
(HPO:0003265) | Neonatal hyperbilirubinemia | 12736383 | IBIS | 6 / 7739 |
Associated genes:
ACAD8; |
ClinVar (via SNiPA)
Gene symbol | Variation | Clinical significance | Reference |
---|---|---|---|
ACAD8 | rs121908418 | pathogenic | RCV000005686.2 |
ACAD8 | rs121908419 | pathogenic | RCV000005687.2 |
ACAD8 | rs121908420 | pathogenic | RCV000005688.2 |
ACAD8 | rs121908421 | pathogenic | RCV000005689.2 |
ACAD8 | rs121908422 | pathogenic | RCV000005690.2 |
Additional Information:
Diagnosis OMIM | Oglesbee et al. (2007) described an algorithm for the diagnosis of IBD deficiency identified by elevated C4-acylcarnitine on newborn screening. They noted that urine acylcarnitine analysis appeared to be a practical tool for diagnosing IBD deficiency. |
Clinical Description OMIM |
The first patient with isobutyryl-CoA dehydrogenase (IBD) deficiency was described by Roe et al. (1998) and presented at age 12 months with dilated cardiomyopathy, anemia, and carnitine deficiency. An elevated C4-acylcarnitine was noted in a plasma acylcarnitine profile, ... |
Molecular genetics OMIM |
Nguyen et al. (2002) found mutation in the ACAD8 gene in the patient described by Roe et al. (1998) (604773.0005). Oglesbee et al. (2007) found 10 different mutations in the ACAD8 gene in 9 individuals with ... |