Effects of infection by larvae of Angiostrongylus cantonensis (Nematoda, Metastrongylidae) on the metabolism of the experimental intermediate host Biomphalaria glabrata

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• 作者：Viní ; cius Menezes Tunholi-Alves^a ; ^b ; Victor Menezes Tunholi^a ; ^b ; Jairo Pinheiro^a ; ¹ ; ^jps@ufrrj.br ; Silvana Carvalho Thiengo^c
• 关键词：Host&ndash ; parasite relationship ; Biomphalaria glabrata ; Angiostrongylus cantonensis ; Biochemical changes
• 刊名：Experimental Parasitology
• 出版年：2012
• 期刊代码：99_00144894
• 类别：imm
• 出版时间：June, 2012
• 卷：131
• 期：2
• 页码：143-147
• 文件大小：325 K

摘要

The effect of infection by Angiostrongylus cantonensis on the activity of the enzymes alanine aminotransferase (ALT) and aspartate aminotransferase (AST) and the concentration of total proteins, uric acid and urea in the hemolymph of Biomphalaria glabrata were investigated. The snails were dissected after 1, 2 and 3 weeks of infection to collect the hemolymph. The infection by A. cantonensis induced severe changes in the host snail鈥檚 metabolism, triggering physiological mechanisms to minimize the deleterious effects caused by the larvae. There was a significant decrease in the concentration of total proteins in the infected snails, which occurred gradually as the infection advanced. This change was accompanied by an increase in the concentrations of urea and a decrease in the levels of uric acid in the hemolymph, suggesting that in this model the infection induces proteolysis and inversion of the excretion pattern of the infected snails. Besides this, variations in the activities of the aminotransferases were observed, with significantly higher levels in the infected groups than in the control group. These results indicate an increase in the protein metabolism of the infected snails, since there was an increase in nitrogen catabolites such as urea.