Methods to identify modulators of cell signaling

C - Chemistry – Metallurgy – 12 – N

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C12N 15/12 (2006.01) A61K 38/17 (2006.01) C07K 7/06 (2006.01) C07K 7/08 (2006.01) C07K 14/705 (2006.01) C07K 16/18 (2006.01) C12N 9/12 (2006.01) C12Q 1/48 (2006.01) C12Q 1/68 (2006.01) G01N 33/50 (2006.01) G01N 33/566 (2006.01) A61K 38/00 (2006.01)

Patent

CA 2233313

Methods for assessing libraries of candidate modulators of intracellular signaling transmission pathways are described. The methods assess the ability of candidates from the library to inhibit the binding of peptides which represent participants in the signaling pathways as either a signal-generating protein or its cognate partner binding at a noncatalytic site. Specific peptides useful in this regard have been identified. In one application, modulators of the immune system can be identified by determining the ability of candidate substances to affect the interaction of PKC-theta or a fragment thereof with its cognate. The interaction can be measured using binding of the cognate as an index, or can be measured using a physiological response.

Cette invention concerne des procédés d'analyse de banques de modulateurs candidats de voies de transmission de signalisation intracellulaire. Ces procédés permettent d'évaluer l'aptitude des candidats contenus dans la banque à inhiber la liaison de peptides constituant des participants dans les processus de signalisation, soit en qualité de protéine génératrice de signaux, soit en qualité de son partenaire correspondant de liaison à un site non catalytique. Des peptides spécifiques pouvant être utilisés à cette fin ont été identifiés. Dans une application, les modulateurs du système immunitaire peuvent être identifiés en déterminant l'aptitude de substances candidates à modifier l'interaction entre une protéine-kinase C-thêta (PKC-thêta), ou l'un de ses fragments, et son élément correspondant. Cette interaction peut être mesurée en utilisant la liaison de l'élément correspondant comme un indice, ou encore, en s'appuyant sur une réponse physiologique.

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