Muscular carnitine palmitoyltransferase II deficiency in infancy.

Pediatr Neurol

Department of Pediatrics, Bikur Cholim General Hospital, Hebrew University-Hadassah Medical School, Jerusalem, Israel.

Published: February 2000

AI Article Synopsis

  • An 8-month-old female patient exhibited fever and myoglobinuria, indicating muscle breakdown and possible metabolic issues.
  • The analysis showed significantly reduced activity of carnitine palmitoyltransferase (CPT) II, with a specific mutation (S113L) identified in the CPT II gene contributing to the condition.
  • This unusual early presentation with severe fatty acid oxidation impairment suggests that other genetic factors might be involved and underscores the importance of considering CPT II deficiency in cases of unexplained myoglobinuria in infants.

Article Abstract

An 8-month-old female presented with febrile myoglobinuria. The activity of carnitine palmitoyltransferase (CPT) II was decreased to 16% of the control mean, and the oxidation of the long-chain fatty acids was reduced to 25% of the mean in the fibroblasts. Homozygosity for the common mutation, S113L, was identified in the CPT II gene. Residual CPT II activity of more than 10% of the mean and homozygosity for the common mutation S113L are usually associated with a milder reduction of long-chain fatty acid oxidation to about 80% of the control and with a later age of clinical onset. The early clinical presentation in the present patient is unique and was associated with a marked impairment of long-chain fatty acid oxidation, possibly because of other genetic factors. CPT II deficiency should be included in the differential diagnosis of isolated myoglobinuria in infancy.

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Source
http://dx.doi.org/10.1016/s0887-8994(99)00125-3DOI Listing

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