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1 2000

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High-performance thin-layer chromatographic analysis of neutral lipids and phospholipids in Cerithidia californica (Gastropoda) infected with three species of larval trematodes

Cline D. J., Fried B., Sherma S.

Acta Chromatographica

2000

No. 10

183-189

High-performance thin-layer chromatography (HPTLC) has been used to analyze neutral lipids and phospholipids in the digestive gland–gonad complex (DGG) of Cerithidia californica snails infected with three species of larval trematode: Euhaplorchis californiensis, Cloacitrema michiganensis, and Mesostephanus appendiculatus. C. californica not infected with larval trematodes were used as control snails. The triacylglycerol content of the DGGs of snails infected with the three species of larval trematodes was significantly less than that of the controls. There was no significant difference between the free sterol content of DGGs infected with any larval trematode type compared with controls. The cholesteryl ester content was significantly lower than that of the controls only in snails infected with C. michiganensis. The situation was variable for free fatty acid content, with M. appendiculatus and E. califor-niensis infections resulting in a significant increase in the concentration of this fraction, compared with that of the controls, and C. michiganensis resulting in a significant decrease. Phosphatidylethanolamine content was increased significantly by all three infections and phosphatidylcholine content was increased by a factor of two or three compared with controls. In conclusion, larval parasitism in C. californica induces different lipid profiles in this marine snail, and these differences can provide chemo-taxonomic information for discrimination between larval trematodes from the snail host.