Antibody-dependent cellular cytotoxicity assay

G - Physics – 01 – N

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G01N 33/50 (2006.01)

Patent

CA 2636183

Methods for detecting antibody dependent cellular cytotoxicity (ADCC) are described herein. The methods are label-free, and can be performed in real time on adherent cells. The methods can include, for example, (a) monitoring the impedance between electrodes on a non-conducting substrate that supports the growth of target cells in an assay medium; and (b) adding effector cells and an antibody that binds to the target cells to the assay medium; wherein any decrease in the impedance between the electrodes on the substrate following addition of the effector cells and the antibody is indicative of ADCC function having been effected in the assay medium.

La présente invention se rapporte à des procédés permettant de détecter la cytotoxicité cellulaire dépendant des anticorps (ADCC). Les procédés selon l'invention ne font pas appel à des marqueurs et peuvent être mis en oeuvre en temps réel sur des cellules adhérentes. Les procédés selon l'invention peuvent par exemple consister : à contrôler l'impédance entre des électrodes placées sur un substrat non conducteur qui favorise la croissance de cellules cibles dans un milieu de dosage ; et à ajouter au milieu de dosage des cellules effectrices et un anticorps qui se lie aux cellules cibles. Toute baisse de l'impédance survenant entre les électrodes sur le substrat après l'ajout des cellules effectrices et de l'anticorps indique l'activation de la fonction ADCC dans le milieu de dosage.

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