Document Detail

Ether lipid composition and molecular species alterations in carp brain (Cyprinus carpio L.) during normoxic temperature acclimation.
MedLine Citation:
PMID:  9342730     Owner:  NLM     Status:  MEDLINE    
Carp (Cyprinus carpio L.) whole brain was used to investigate the thermal acclimation changes under normoxic conditions of three-subclasses (alkenylacyl-, alkylacyl- and diacyl-subclasses) of choline glycerophospholipids (CGP), ethanolamine glycerophospholipids (EGP) and inositol glycerophospholipids (IGP) as well as their acyl chain profiles and molecular species composition. The alkenylacyl subclass of CGP and IGP and the alkylacyl subclass of CGP and EGP varied significantly during summer (25 degrees C) acclimation compared to winter (5 degrees C). The levels of alkenylacyl and alkylacyl-CGP, alkylacyl-EGP and alkenylacyl-IGP were 17.3-, 3.7-, 3.5- and 1.3-fold higher in the summer, respectively, while the alkenylacyl EGP was moderately lower. The levels of diacyl subclasses from CGP and IGP were considerably lower in the summer to compensate for the higher proportion of alkenylacyl and alkylacyl subclasses. Significant changes of ether phospholipids and the reorganization of the molecular species composition of all lipid subclasses may be associated with the "fine tuning" of the physical properties of the cellular membranes in carp brain due to temperature acclimation. The overall acyl chain profile of the three subclasses of carp brain phospholipids showed differences in composition depending upon the subclass of the individual phospholipid. Generally the polyunsaturated fatty acid (PUFA) chain composition increased relative to monounsaturated fatty acid (MUFA) and saturated fatty acids (SFA) during winter acclimation. Docosahexaenoic acid (DHA) was richer in the winter compared to summer. However, no DHA was found in ether-containing species of IGP from either winter or summer, except for 2% in alkylacyl-IGP during the summer. The above observations suggest that the content of ether phospholipids (alkenylacyl and alkylacyl) as well as the reorganization of the molecular species composition of all phospholipids may serve to maintain a functional fluid-crystalline state to preserve the signaling functions in carp brain.
Y K Yeo; E J Park; C W Lee; H T Joo; T Farkas
Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Neurochemical research     Volume:  22     ISSN:  0364-3190     ISO Abbreviation:  Neurochem. Res.     Publication Date:  1997 Oct 
Date Detail:
Created Date:  1998-01-22     Completed Date:  1998-01-22     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7613461     Medline TA:  Neurochem Res     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1257-64     Citation Subset:  IM    
Lipid Chemistry Laboratory, Kyungpook National University, Taegu, Korea.
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MeSH Terms
Brain / metabolism*
Carps / metabolism*
Fatty Acids / metabolism
Fatty Acids, Unsaturated / metabolism
Lipid Metabolism*
Phosphatidylcholines / metabolism
Phosphatidylethanolamines / metabolism
Phosphatidylinositols / metabolism
Reg. No./Substance:
0/Fatty Acids; 0/Fatty Acids, Unsaturated; 0/Phosphatidylcholines; 0/Phosphatidylethanolamines; 0/Phosphatidylinositols

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