Tolstenkov O.O.1, Terenina N.B.1, Shalaeva N.M.2, Gaivoronskaja T.V.1 2008. [The organization of the muscular system and the distribution of NO-ergic and serotoninergic elements of trematodes Allocreadium isoporum Looss, 1894 (Allocreadiidae) and Paramphistomum cervi Zeder, 1790 (Paramphistomatidae)] // Invertebrate Zoology. Vol.4 (for 2007). No.2: 139–149 [in Russian, with English summary].

1 Center of Parasitology of A.N. Severtsov Institute of Ecology and Evolution, Russian Academy of Science, Leninskiy prospect 33, 119071 Moscow, Russia. E-mail: otolo@mail.ru

2 Department of Invertebrate Zoology, Biological Faculty, Moscow State University, Vorobievy Gori, 119899 Moscow, Russia.

KEY WORDS: Trematoda, Allocreadium isoporum, Paramphistomum cervi, musculature, nervous system, neuromediators, nitric oxide, serotonin.

ABSTRACT: TRITC-conjugated phalloidin staining was used to investigate the anatomical organization of the musculature of Allocreadium isoporum and Paramphistomum cervi. The distribution of NO-ergic and 5-HT-ergic elements in the nervous system and the musculature was studied. Structures generating NO and 5-HT-ergic elements were observed in the central and peripheral nervous system of both species. The presence of NO-ergic and 5-HT-ergic nerve elements in the musculature testified the participation of nitric oxide and serotonin in the regulation of the motility of trematodes.

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