title: Taenia crassiceps organic acids detected in cysticerci.
abstract: Taenia crassiceps cysticerci is used as an experimental model to cysticercosis studies; however there are subcutaneous cases of cysticercosis caused by these cysticerci. It remains unclear in the literature the energetic and fatty acid metabolism in cestodes. Its metabolic study may provide knowledge of pathways that may serve as potential anti-helminthic drugs sites of action. In this work we studied the citric acid cycle organic acids and the fatty acid oxidation in cysticerci removed from mice with 21 and 42 days of infection in two different evolutive stages: growing and final. The organic acids were extracted using perchloric acid and analyzed by HPLC methodology. We found significant statistically differences in oxalate, malate, lactate, and beta-hydroxybutirate concentrations between cysticerci. These results indicate the aerobic metabolism in vivo in spite of the low oxygen concentration of its habitat, and also indicate the presence of fatty acid oxidation as an alternative energetic source.
authors.affiliation: Tropical Pathology and Public Health Institute, Federal University of Goiás, Setor Universitário, Goiânia, Goiás, Brazil. mvinaud@yahoo.com.br <mvinaud@yahoo.com.br>
authors.forename: Marina C
authors.initials: MC
authors.lastname: Vinaud
authors.forename: Ruy de Souza
authors.initials: Rde S
authors.lastname: Lino
authors.forename: José Clecildo Barreto
authors.initials: JC
authors.lastname: Bezerra
mesh_terms: D020155:3-Hydroxybutyric Acid / Q000032:analysis; D000818:Animals; D050260:Carbohydrate Metabolism; D002851:Chromatography, High Pressure Liquid; D002952:Citric Acid Cycle / Q000502:physiology*; D003552:Cysticercus / Q000737:chemistry / Q000378:metabolism; D004734:Energy Metabolism; D005227:Fatty Acids / Q000378:metabolism*; D019344:Lactic Acid / Q000032:analysis; D008293:Malates / Q000032:analysis; D051379:Mice; D008807:Mice, Inbred BALB C; D010070:Oxalates / Q000032:analysis; D062907:Oxaloacetic Acid / Q000032:analysis; D011422:Propionates / Q000032:analysis; D013621:Taenia / Q000737:chemistry* / Q000378:metabolism*
chemical_list: D005227:Fatty Acids; D008293:Malates; D010070:Oxalates; D011422:Propionates; D062907:Oxaloacetic Acid; D019344:Lactic Acid; C030298:malic acid; D020155:3-Hydroxybutyric Acid