| Autor: |
KAMIJO, TAKEHIKO, INDO, YASUHIRO, SOURI, MASAYOSHI, AOYAMA, TOSHIFUMI, HARA, TOMOKUNI, YAMAMOTO, SHIGENORI, USHIKUBO, SEIICHI, RINALDO, PIERO, MATSUDA, ICHIRO, KOMIYAMA, ATSUSHI, HASHIMOTO, TAKASHI |
| Zdroj: |
Pediatric Research (Ovid); November 1997, Vol. 42 Issue: 5 p569-576, 8p |
| Abstrakt: |
A Japanese male neonate died at 13 d of age after presenting at 2 d of age with vomiting, dehydration, metabolic acidosis, liver dysfunction, and terminal rabdhomyolysis with myoglobinuria. Multiple urine organic acid analyses consistently revealed a markedly elevated excretion of lactic acid, 3-hydroxybutyric acid, and saturated and unsaturated C6-C16dicarboxylic acids, with predominant C12-C16species. Oxidation of [1-14C]octanoic acid in cultured skin fibroblasts was significantly reduced (0.59 nmol/h/mg of protein; controls, 1.93 ± 0.65), [1-14C]palmitic acid oxidation was 1.11 nmol/h/mg of protein (controls, 1.63 ± 0.41). A systematic study of the catalytic activities of nine enzymes of the β-oxidation cycle using the respective optimal substrate revealed a deficiency of a single enzyme not previously associated with a metabolic disorder, medium chain 3-ketoacyl-CoA thiolase (patient, 3.9 nmol/min/mg protein; controls (n= 6), 10.2 ± 2.3). Immunoprecipitation with antibodies raised against medium chain 3-ketoacyl-CoA thiolase revealed a 60% decrease compared with controls. |
| Databáze: |
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