High-performance thin-layer chromatographic analysis of neutral lipids and phospholipids in Biomphalaria glabrata patently infected with Echinostoma caproni

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Abstract
This study examined the effects of larval trematode infection on the neutral lipid and phospholipid content of Biomphalaria glabrata patently infected with the daughter rediae of Echinostoma caproni. Uninfected snails were used as matched controls. As determined by qualitative high-performance silica gel thin-layer chromatography (HPTLC), the major neutral lipids present in the whole bodies and digestive gland–gonad complexes in both snail populations were free sterols, free fatty acids, and triacylglycerols, and the major polar lipids were phosphatidylcholine and phosphatidylethanolamine. Quantitative analysis by HPTLC with visible and UV scanning reflectance densitometry showed no significant differences in the concentrations of these lipids in whole bodies of infected snails vs the controls, but the concentration of triacylglycerols in the infected digestive gland–gonad complex was significantly less than that of the uninfected. No qualitative differences in neutral lipids and phospholipids in shell or plasma samples were found between infected vs uninfected snails.

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