title: Immunohistochemical localization of rhamnose-binding lectins in the steelhead trout (Oncorhynchus mykiss).
abstract: The localization of three -rhamnose-binding lectins named STL1, STL2, and STL3 from eggs of steelhead trout (Oncorhynchus mykiss) was analyzed by indirect immunohistochemical staining with specific antisera against individual lectins. In early previtellogenic oocyte, STL1 was localized not only in the cortical vesicles, but also in the plasma membrane and germinal vesicle. On the other hand, STL2 and STL3 were localized only in the cortical vesicles. In pre-fertilization mature egg, STLs were localized in a thin layer of cortical granules at the cytoplasmic side of the plasma membrane. STLs were accumulated on the surface of cytoplasm and inner membrane 30 min after fertilization. The strong staining with anti-STL1 antiserum was observed in several tissues and cells of the steelhead trout, such as spleen, thrombocytes, and blood leukocytes, but not erythrocytes. STL1 was also identified in exocrine cells, such as goblet cells of intestine and mucous cells of gill. These results indicate that the multiple lectins found in eggs of the steelhead trout play physiological roles not only in eggs, but also in various cells related to the innate immunity.
authors.affiliation: Department of Biological Resource Sciences, Graduate School of Agricultural Science, Tohoku University, 1-1 Tsutsumidori-amamiyamachi, Aoba-ku, Miyagi Sendai 981-8555, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Tateno
authors.forename: T
authors.initials: T
authors.lastname: Yamaguchi
authors.forename: T
authors.initials: T
authors.lastname: Ogawa
authors.forename: K
authors.initials: K
authors.lastname: Muramoto
authors.forename: T
authors.initials: T
authors.lastname: Watanabe
authors.forename: H
authors.initials: H
authors.lastname: Kamiya
authors.forename: M
authors.initials: M
authors.lastname: Saneyoshi
mesh_terms: D000818:Animals; D001769:Blood; D001773:Blood Cells / Q000276:immunology / Q000378:metabolism; D015153:Blotting, Western; D005260:Female; D029941:Fish Proteins; D005880:Gills / Q000276:immunology / Q000378:metabolism; D007150:Immunohistochemistry; D007413:Intestinal Mucosa / Q000378:metabolism; D007422:Intestines / Q000276:immunology; D037102:Lectins / Q000276:immunology* / Q000378:metabolism; D008297:Male; D018613:Microscopy, Confocal; D009865:Oocytes / Q000166:cytology / Q000276:immunology* / Q000378:metabolism; D013154:Spleen / Q000276:immunology / Q000378:metabolism; D013737:Testis / Q000276:immunology / Q000378:metabolism; D014337:Trout / Q000254:growth & development / Q000276:immunology* / Q000378:metabolism
chemical_list: D029941:Fish Proteins; D037102:Lectins; C442147:rhamnose-binding lectin, trout