Document Detail


Impaired degradation of leukotrienes in patients with peroxisome deficiency disorders.
MedLine Citation:
PMID:  8450067     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The degradation of leukotrienes by beta-oxidation from the omega-end proceeds in peroxisomes (Jedlitschky et al. J. Biol. Chem. 1991. 266:24763-24772). Peroxisomal degradation of leukotrienes was studied in humans by analyses of endogenous leukotrienes in urines from eight patients with biochemically established peroxisome deficiency disorder and eight age- and sex-matched healthy infant controls. Leukotriene metabolites were separated by high-performance liquid chromatography, quantified by radioimmunoassays, and identified as well as quantified by gas chromatography-mass spectrometry. Urinary leukotriene E4 (LTE4) and N-acetyl-LTE4 excretions, relative to creatinine, were increased > 10-fold in the patients in comparison to healthy infants. The beta-oxidation product omega-carboxy-tetranor-LTE3 averaged 0.05 mumol/mol creatinine in the controls but was not detectable in the patients. However, omega-carboxy-LTE4 (median 13.6 mumol/mol creatinine) was significantly increased in the patients' urine, whereas LTB4 (median 0.07 mumol/mol creatinine) and omega-carboxy-LTB4 were detected exclusively in the urines of the patients. These data indicate an impairment of the inactivation and degradation of both LTE4 and LTB4 in patients with peroxisomal deficiency. The increased levels of the biologically active, proinflammatory mediators LTE4 and LTB4 might be of pathophysiological significance in peroxisome deficiency disorders. This is the first and so far only condition with a pronounced urinary excretion of omega-carboxy-LTE4, omega-carboxy-LTB4, and LTB4. This impaired catabolism of leukotrienes and the altered pattern of metabolites may be of diagnostic value. These findings underline the essential role of peroxisomes in the catabolism of leukotrienes in humans.
Authors:
E Mayatepek; W D Lehmann; J Fauler; D Tsikas; J C Frölich; R B Schutgens; R J Wanders; D Keppler
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Journal of clinical investigation     Volume:  91     ISSN:  0021-9738     ISO Abbreviation:  J. Clin. Invest.     Publication Date:  1993 Mar 
Date Detail:
Created Date:  1993-04-13     Completed Date:  1993-04-13     Revised Date:  2009-11-18    
Medline Journal Info:
Nlm Unique ID:  7802877     Medline TA:  J Clin Invest     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  881-8     Citation Subset:  AIM; IM    
Affiliation:
German Cancer Research Center, Heidelberg.
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MeSH Terms
Descriptor/Qualifier:
Chromatography, High Pressure Liquid
Female
Gas Chromatography-Mass Spectrometry
Humans
Infant
Leukotrienes / metabolism*,  urine
Male
Microbodies / metabolism*
Radioimmunoassay
Reference Values
Zellweger Syndrome / metabolism*,  urine
Chemical
Reg. No./Substance:
0/Leukotrienes
Comments/Corrections

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