carboxylase/crise epiléptica

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Cerebral pyruvate carboxylase flux is unaltered during bicuculline-seizures.

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Glutamine synthesis in the astroglia reflects the sum of neurotransmitter cycling (glutamate and gamma-aminobutyric acid [GABA]) and de novo synthesis (anaplerosis), the latter catalyzed by pyruvate carboxylase. Previous studies have shown that the glutamate plus GABA cycling flux is correlated

Metabolic stroke in isolated 3-methylcrotonyl-CoA carboxylase deficiency.

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A mildly retarded infant with failure to thrive developed hypoglycaemia, focal seizures, respiratory failure and hemiparesis during a febrile episode at the age of 16 months. A brain scan was initially normal and showed hemilateral focal edema and gliosis at later stages. 3-Methylcrotonyl-CoA

Recurrent attacks of status epilepticus as predominant symptom in 3-methylcrotonyl-CoA carboxylase deficiency.

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A patient with isolated 3-methylcrotonyl-CoA carboxylase (MCC) deficiency with an unusual clinical presentation is described. The patient presented with clusters of seizures with two or three months disease free interval in the first year of life which then evolved into attacks of status epilepticus

3-Methylcrotonyl-CoA carboxylase deficiency: phenotypic variability in a family.

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A family with 3-methylcrotonyl-CoA carboxylase deficiency with different clinical features is described. A 15-month-old boy, who was the index patient, was admitted to the hospital with atonic seizure. His brother had delayed language development and their uncle had been followed with diagnosis of

Biotinidase deficiency: the enzymatic defect in late-onset multiple carboxylase deficiency.

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Late-onset multiple carboxylase deficiency is characterized clinically by skin rash, alopecia, seizures and ataxia and occasionally by candidiasis and developmental delay. Biochemically, these individuals exhibit findings consistent with a combined deficiency of the biotin-dependent carboxylases. We

Biotin-responsive encephalopathy with myoclonus, ataxia, and seizures.

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Prominent neurological abnormalities, including myoclonus, seizures, ataxia, and hearing loss, have been noted in juvenile-onset biotin-responsive MCD. The underlying defect in many of these patients, who generally present in the first year of life, appears to be a deficiency of biotinidase. We have

Multiple carboxylase deficiency: clinical and biochemical improvement following neonatal biotin treatment.

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Multiple carboxylase deficiency is characterized by deficient activities of three biotin-dependent enzymes, propionyl coenzyme A carboxylase, pyruvate carboxylase, and beta-methylcrotonyl coenzyme A carboxylase. A newborn infant was seen with metabolic ketoacidosis, hyperammonemia, organic aciduria,

Isolated 3-methylcrotonyl-CoA carboxylase deficiency in a 15-year-old girl.

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A 15-year-old girl with a former clinical diagnosis of cerebral palsy was found to have isolated deficiency of 3-methylcrotonyl-CoA carboxylase (MCC) on gas chromatography-mass spectrometry (GC/MS) analysis and enzyme determination. Her symptoms included marked growth retardation from birth,

Isolated biotin-resistant 3-methylcrotonyl-CoA carboxylase deficiency: long-term outcome in a case with neonatal onset.

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A patient with early-onset 3-methylcrotonyl coenzyme A carboxylase (MCC) deficiency showing a severe clinical course is described. Abnormal eye and head movements suggestive of seizures were noticed soon after birth. Tonic convulsions at the age of 10 weeks led to admission. Urinary organic acid

Propionyl coenzyme A carboxylase deficiency presenting as non-ketotic hyperglycinaemia.

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A 4-month-old girl presented with myoclonic seizures and an electroencephalogram showing hypsarrhythmia. Hyperglycinuria and a cerebrospinal fluid to plasma glycine ratio of 0.2 suggested the diagnosis of non-ketotic hyperglycinaemia. Propionic acid and methyl citric acid were present in the urine,

Biochemical and histologic pathology in an infant with cross-reacting material (negative) pyruvate carboxylase deficiency.

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An infant with the acute neonatal form of pyruvate carboxylase deficiency (cross-reacting material negative) presented with severe intractable lactic acidosis within 4 h after birth. He also had hyperammonemia, hypercitrullinemia, and hyperlysinemia. Plasma glutamine was not elevated. He had a

Prolonged survival in pyruvate carboxylase deficiency: lack of correlation with enzyme activity in cultured fibroblasts.

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OBJECTIVE To report the clinical history and laboratory evaluation of a patient presenting with lactic acidosis secondary to pyruvate carboxylase deficiency. RESULTS Enzyme analysis of cultured skin fibroblasts revealed 2-5% of normal pyruvate carboxylase activity. Although most patients with this

A case of pyruvate carboxylase deficiency with later prenatal diagnosis of an unaffected sibling.

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A severely mentally retarded infant with congenital lactic acidosis due to pyruvate carboxylase deficiency is reported. The patient suffered from vomiting and convulsions soon after birth and developed severe mental and motor retardation at 3 months of age. The persistent elevation of pyruvate and

Isolated 3-methylcrotonyl-CoA carboxylase deficiency: evidence for an allele-specific dominant negative effect and responsiveness to biotin therapy.

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Deficiency of 3-methylcrotonyl-CoA carboxylase (MCC) results in elevated excretion of 3-methylcrotonylglycine (3-MCG) and 3-hydroxyisovaleric acid (3-HIVA). MCC is a heteromeric mitochondrial enzyme comprising biotin-containing alpha subunits and smaller beta subunits, encoded by MCCA and MCCB,

Isolated biotin-resistant deficiency of 3-methylcrotonyl-CoA carboxylase presenting as a clinically severe form in a newborn with fatal outcome.

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The son of Kurdish, consanguineous parents (cousin marriage) presented from the first day of life with initially focal and later generalized attacks of epileptic seizures and a severe generalized muscular hypotonia. Urinary excretion of 3-hydroxyisovalerate and of 3-methylcrotonylglycine was

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