title: Distribution of tetrodotoxin in the ribbon worm Lineus alborostratus (Takakura, 1898) (nemertea): Immunoelectron and immunofluorescence studies.
abstract: Transmission electron and confocal laser scanning (CLSM) microscopies with monoclonal anti-tetrodotoxin antibodies were used to locate tetrodotoxin (TTX) in tissues and gland cells of the ribbon worm Lineus alborostratus. CLSM studies have shown that the toxin is primarily localized in the cutis (special subepidermal layer) of the body wall and in the glandular epithelium of the proboscis. Immunoelectron micrographs have shown that only subepidermal bacillary gland cells type I in cutis and pseudocnidae-containing and mucoid gland cells manifested TTX-gold labeling. TTX was associated with the nuclear envelope, endoplasmic reticulum membrane, and secretory granules of TTX-positive gland cells. These studies indicate that ТТХ is brought into the cytoplasm of the glandular cells of the cutis and proboscis epithelium, where it is associated with membrane-enclosed organelles involved in protein secretion and then concentrated in glandular granules.
authors.affiliation: A.V. Zhirmunsky Institute of Marine Biology, Far Eastern Branch, Russian Academy of Sciences, Vladivostok, Russia; School of Biomedicine, Far Eastern Federal University, Vladivostok, Russia. Electronic address: biotimur@yandex.ru.
authors.forename: Timur Yu
authors.initials: TY
authors.lastname: Magarlamov
authors.affiliation: School of Biomedicine, Far Eastern Federal University, Vladivostok, Russia.
authors.forename: Olga A
authors.initials: OA
authors.lastname: Shokur
authors.affiliation: A.V. Zhirmunsky Institute of Marine Biology, Far Eastern Branch, Russian Academy of Sciences, Vladivostok, Russia; School of Natural Sciences, Far Eastern Federal University, Vladivostok, Russia.
authors.forename: Alexey V
authors.initials: AV
authors.lastname: Chernyshev
mesh_terms: D000818:Animals; D059001:Aquatic Organisms / Q000254:growth & development / Q000378:metabolism* / Q000648:ultrastructure; D004721:Endoplasmic Reticulum / Q000378:metabolism / Q000648:ultrastructure; D007448:Invertebrates / Q000254:growth & development / Q000378:metabolism* / Q000648:ultrastructure; D018613:Microscopy, Confocal / Q000662:veterinary; D046529:Microscopy, Electron, Transmission / Q000662:veterinary; D008856:Microscopy, Fluorescence / Q000662:veterinary; D016253:Microscopy, Immunoelectron / Q000662:veterinary; D009498:Neurotoxins / Q000378:metabolism / Q000633:toxicity*; D009685:Nuclear Envelope / Q000378:metabolism / Q000648:ultrastructure; D010140:Pacific Ocean; D012426:Russia; D022142:Secretory Vesicles / Q000378:metabolism / Q000648:ultrastructure; D026941:Sodium Channel Blockers / Q000378:metabolism / Q000633:toxicity*; D013779:Tetrodotoxin / Q000378:metabolism / Q000633:toxicity*; D014018:Tissue Distribution; D066007:Toxicokinetics
chemical_list: D009498:Neurotoxins; D026941:Sodium Channel Blockers; D013779:Tetrodotoxin
keywords: Confocal laser scanning microscopy; Immunogold staining; Microdistribution; Nemertea; Tetrodotoxin