| Heat stress deteriorates mitochondrial beta-oxidation of long-chain fatty acids in cultured fibroblasts with fatty acid beta-oxidation disorders. | |
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MedLine Citation:
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PMID: 20207594 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Mitochondrial fatty acids beta-oxidation disorder (FAOD) has become popular with development of tandem mass spectrometry (MS/MS) and enzymatic evaluation techniques. FAOD occasionally causes acute encephalopathy or even sudden death in children. On the other hand, hyperpyrexia may also trigger severe seizures or encephalopathy, which might be caused by the defects of fatty acid beta-oxidation (FAO). We investigated the effect of heat stress on FAO to determine the relationship between serious febrile episodes and defect in beta-oxidation of fatty acid in children. Fibroblasts from healthy control and children with various FAODs, were cultured in the medium loaded with unlabelled palmitic acid for 96 h at 37 degrees C or 41 degrees C. Acylcarnitine (AC) profiles in the medium were determined by MS/MS, and specific ratios of ACs were calculated. Under heat stress (at 41 degrees C), long-chain ACs (C12, C14, or C16) were increased, while medium-chain ACs (C6, C8, or C10) were decreased in cells with carnitine palmitoyl transferase II deficiency, very-long-chain acyl-CoA dehydrogenase deficiency and mitochondrial trifunctional protein deficiency, whereas AC species from short-chain (C4) to long-chain (C16) were barely affected in medium-chain acyl-CoA dehydrogenase and control. While long-chain ACs (C12-C16) were significantly elevated, short to medium-chain ACs (C4-C10) were reduced in multiple acyl-CoA dehydrogenase deficiency. These data suggest that patients with long-chain FAODs may be more susceptible to heat stress compared to medium-chain FAOD or healthy control and that serious febrile episodes may deteriorate long-chain FAO in patients with long-chain FAODs. |
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Authors:
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Hong Li; Seiji Fukuda; Yuki Hasegawa; Jamiyan Purevsuren; Hironori Kobayashi; Yuichi Mushimoto; Seiji Yamaguchi |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-02-11 |
Journal Detail:
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Title: Journal of chromatography. B, Analytical technologies in the biomedical and life sciences Volume: 878 ISSN: 1873-376X ISO Abbreviation: J. Chromatogr. B Analyt. Technol. Biomed. Life Sci. Publication Date: 2010 Jun |
Date Detail:
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Created Date: 2010-05-31 Completed Date: 2010-08-17 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101139554 Medline TA: J Chromatogr B Analyt Technol Biomed Life Sci Country: Netherlands |
Other Details:
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Languages: eng Pagination: 1669-72 Citation Subset: IM |
Copyright Information:
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2010 Elsevier B.V. All rights reserved. |
Affiliation:
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Department of Pediatrics, Shimane University School of Medicine, 89-1 Enya-cho, Izumo, Shimane 693-8501, Japan. nxlihong@163.com |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Carnitine / analogs & derivatives, metabolism Child Fatty Acids / chemistry, metabolism* Female Fibroblasts / metabolism* Heat Stress Disorders / metabolism* Humans Lipid Metabolism, Inborn Errors / metabolism* Male Mitochondria / metabolism* Oxidation-Reduction Tandem Mass Spectrometry |
| Chemical | |
Reg. No./Substance:
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0/Fatty Acids; 0/acylcarnitine; 541-15-1/Carnitine |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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