Fried B, Rao K S, Sherma J, Huffman J E
Department of Biology, Lafayette College, Easton, PA 18042.
Parasitol Res. 1993;79(6):471-4. doi: 10.1007/BF00931585.
Gas-liquid chromatographic studies were done to determine the fatty acid composition of the digestive gland-gonad (DGG) complex of Helisoma trivolvis snails infected with the intramolluscan stages of Echinostoma trivolvis, of rediae freed from the DGG, of uninfected DGG, and of 41-day-old adult worms grown in golden hamsters. The DGG of infected snails showed significantly higher levels of stearic acid (18:0), hexatrienoic acid (16:3n-4), and docosahexanoic acid (22:6n-3) than that of uninfected snails. However, the DGG of uninfected snails showed significantly higher levels of 20:2 non-methylene-interrupted diene (NMID) and adrenic acid (22:4n-6) than that of infected snails. The profiles of other fatty acids were remarkably similar in both infected and uninfected snails. Adult worms showed significantly higher amounts of numerous saturated fatty acids and dienes as compared with the rediae. However, the rediae showed significantly higher amounts of certain monoenes and trienes as compared with the adults. Fatty acid differences between rediae and adults probably reflect differences in either the available lipid pools in the immediate host sites or the metabolic activity of each stage of this echinostome.
进行了气液色谱研究，以确定感染三带棘口吸虫软体动物内阶段的三角帆蚌消化腺-性腺（DGG）复合体、从DGG分离出的雷蚴、未感染的DGG以及在金黄仓鼠体内生长41天的成虫的脂肪酸组成。感染蜗牛的DGG中硬脂酸（18:0）、十六碳三烯酸（16:3n - 4）和二十二碳六烯酸（22:6n - 3）的含量显著高于未感染蜗牛。然而，未感染蜗牛的DGG中20:2非亚甲基间断二烯（NMID）和肾上腺酸（22:4n - 6）的含量显著高于感染蜗牛。在感染和未感染的蜗牛中，其他脂肪酸的分布非常相似。与雷蚴相比，成虫体内大量饱和脂肪酸和二烯的含量显著更高。然而，与成虫相比，雷蚴体内某些单烯和三烯的含量显著更高。雷蚴和成虫之间的脂肪酸差异可能反映了直接宿主部位可用脂质库的差异，或者这种棘口吸虫各阶段的代谢活性差异。
