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"Matsuyama, T.(National Research Inst. of Aquaculture, Minami-Ise, Mie (Japan))"
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Production and characterization of monoclonal antibodies to leukocytes and serum immunoglobulin in Japanese flounder Paralichthys olivaceus
Two monoclonal antibodies (MAbs: JFW1 and JFW10) were produced against peripheral blood leukocytes (PBL) in Japanese flounder. Additionally, MAbs against flounder immunoglobulin (Ig; JFW20 and JFW21) were generated for the surface marker of Igsup(+) leukocytes using purified serum Ig as an antigen. MAb JFW1 recognized the surface marker of granulocytes and monocytes and MAb JFW10 specifically bound to the surface antigen of thrombocytes. Flow cytometric analysis of PBL incubated with JFW1, JFW10, JFW20 and JFW21 revealed that 2.5-7.4, 23.7-50.1, 25.2-26.1 and 5.2-8.3% of all leukocytes were positive for these markers. Analysis of head kidney leukocytes (HKL) showed that JFW1, JFW10, JFW20 and JFW21 bound to 30.5-36.3, 1.9-2.8, 6.4-8.3 and 1.9-3.0% of all leukocytes, respectively. Western blot analysis after SDS-PAGE showed that JFW10 recognizes a protein of 115 kDa from lysed PBL. JFW20 recognized the 70 and 74 kDa proteins of the heavy chain of Ig from serum. No band was observed for either JFW1 or JFW21. These antibodies will be useful for the identification and isolation of Japanese flounder leukocyte subpopulations and will facilitate immunological studies of flounder.
Journal Article