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Trichuris muris Infection: A Model of Type 2 Immunity and Inflammation in the Gut
Published on: May 24, 2011
Efecto de los Cestodos Parásitos del Intestino Delgado sobre las Actividades de Proteasas del Huésped en Polluelos de
1Murmansk Marine Biological Institute, Russian Academy of Sciences, Murmansk, Russia. mm_kuklina@mail.ru.
Abstract:
Total protease activity and activities of protease subclasses in the small intestine were assayed in herring gull (Larus argentatus (Pontoppidan, 1763)) chicks infested by the cestodes Tetrabothrius erostris (Loennberg, 1889) (Cestoda: Tetrabothriidae), Microsomacanthus ductilus (Linton, 1927) (Cestoda: Hymenolepididae), Wardium cirrosa (Krabbe, 1869) (Cestoda: Aploparaksidae), Arctotaenia tetrabothrioides (Loennberg, 1890), and Alcataenia larina (Krabbe, 1869) (Cestoda: Dilepididae). Serine protease activity was found to decrease in small intestine sites with the highest cestode abundance (M. ductilus in the proximal segment; W. cirrosa in the distal segment; and Ar. tetrabothrioides, T. erostris, and Al. larina in the medial segment). Cysteine protease activity increased in sites of M. ductilus, W. cirrosa, and Al. larina location. Protease absorption on the tegument surface was observed in all of the cestodes under study, and serine proteases accounted for a major part of the absorbed enzymes. Homogenates of W. cirrosa, M. ductilus, Ar. tetrabothrioides, T. erostris, and Al. larina were shown to inhibit activities of host proteases and commercial trypsin.
