Abstract
T. Usagawa, M. Nishimura, Y. Itoh, T. Uda and T. Yasumoto. Preparation of monoclonal antibodies against okadaic acid prepared from the sponge Halichondria okadai. Toxicon 27, 1323–1330, 1989.—Three murine monoclonal antibodies, OA-1, OA-2 and OA-3, against okadaic acid were prepared from hybridoma clones obtained by fusion of mouse 653 myeloma cells with mouse immune spleen cells sensitized to okadaic acid-ovalbumin conjugate. Each antibody reacted with dinophysistoxin-1 ( = 35-methylokadaic acid) as well as okadaic acid, but did not react with the other diarrhetic shellfish poisons or related compounds, such as 7- O-palmitoyl-okadaic acid (analogue of dinophysistoxin-3), pectenotoxin-1 and yessotoxin. A competitive inhibition enzyme-linked immunosorbent assay which employed OA-3 antibody was performed and showed a sensitivity of about 10ppb (10ng/ml) for okadaic acid. This simple and time-saving ELISA assay system may be useful for the specific detection of diarrhetic shellfish poisons.
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