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Uptake and utilization of arachidonic acid in infective larvae of Angiostrongylus cantonensis

Published online by Cambridge University Press:  25 November 2010

P. Tang  and
L.-C. Wang
P. Tang
Affiliation:
Department of Parasitology, College of Medicine, Chang Gung University, Tao-Yuan33332, Taiwan
L.-C. Wang*
Affiliation:
Department of Parasitology, College of Medicine, Chang Gung University, Tao-Yuan33332, Taiwan
*
*E-mail: wanglc@mail.cgu.edu.tw
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Abstract

Infective larvae of Angiostrongylus cantonensis may take up and incorporate exogenous arachidonic acid into their lipid pool. By scintillation counting, uptake and incorporation were determined to be time dependent. Arachidonic acid was mainly incorporated into phospholipid (56.8%) and neutral lipid (22.4%) pools. In the neutral lipids, 64.0% was diglyceride and 36.0% triglyceride. Phosphatidylcholine was the predominant fatty acid in the phospholipid pool. In addition to the release of leukotriene B4, the parasite was found to generate radiolabelled CO2 after incubation with [U-14C]arachidonate. Moreover, enzymatic analysis of crude extracts revealed the presence of acyl-CoA dehydrogenase (short and long chain), thiolase, enoyl-CoA hydratase and 3-hydroxyacyl-CoA dehydrogenase. These findings suggest that infective larvae of A. cantonensis not only take up and incorporate exogenous arachidonic acid into their lipid pool, but may also utilize the fatty acid through a functional β-oxidation pathway.

Type
Research Papers
Information
Journal of Helminthology , Volume 85 , Issue 4 , December 2011 , pp. 395 - 400
Copyright
Copyright © Cambridge University Press 2010

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