Quantitative method for detecting yessotoxins in fish...

C - Chemistry – Metallurgy – 12 – Q

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C12Q 1/44 (2006.01) A61K 31/35 (2006.01) A61P 11/06 (2006.01) A61P 35/00 (2006.01) A61P 37/08 (2006.01) G01N 21/64 (2006.01)

Patent

CA 2533600

The invention relates to a quantitative method for detecting yessotoxins in fish products based on the activation caused by the toxin in cellular phosphodiesterase and therapeutic usefulness of said activation. The cellular target of yessotoxin (YTX) and analogues is the activation of phosphodiesterases (PDEs). The PDEs-YTX union emits a measurable signal. The union can be quantified by means of an affinity biosensor or fluorescence. The biosensor detects bimolecular interactions and makes it possible to determine the presence of YTX due to its interaction with PDEs. Plate fluorescence makes it possible to determine variations in the speed of degradation of fluorescent derivative anthranyloil-AMPc. The speed with which the PDEs degrade this molecule increases in the presence of YTX. The YTX inhibits the immunological activation of rat mastocytese and induces a cytotoxic effect in human hepatocarcinoma cells, which provides two therapeutic utilities of YTXs as anti-allergic and anti-tumoral compound.

L'invention concerne une méthode quantitative de détection de yessotoxines dans des produits halieutiques basée sur l'activation que produit la toxine dans les phosphodiestérases cellulaires et l'utilité thérapeutique de cette activation. La cible cellulaire de la yessotoxine (YTX) et analogues est l'activation des phosphodiestérases (PDE). L'union de PDE-YTX donne un signal mesurable. L'union peut être quantifiée par un biocapteur d'affinité ou par fluorescence. Le biocapteur détecte les interactions biomoléculaires et il permet de déterminer la présence de YTX de par son interaction avec les PDE. La fluorescence sur plaque permet de déterminer les variations de la vitesse de dégradation du dérivé fluorescent anthraniloyle-AMPc. La vitesse à laquelle les PDE dégradent cette molécule augmente en présence de YTX. La YTX inhibe l'activation immunologique de mastocytes de rat et elle induit un effet cytotoxique dans les cellules d'hépatocarcinome humain ce qui présente deux utilités thérapeutiques des YTX comme composé anti-allergique et antitumoral.

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