G2 checkpoint inhibitors and assay

A - Human Necessities – 61 – K

Patent

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Details

A61K 31/00 (2006.01) A61K 31/33 (2006.01)

Patent

CA 2304638

Compounds are provided that inhibit the G2 checkpoint in the cell cycle and are useful for sensitizing cells to killing by DNA damaging agents. Also provided is an assay for G2 checkpoint inhibitors which includes applying a DNA damaging agent to cells which are incapable of G1 arrest but will arrest at G2 in response to the DNA damaging agent and determining whether the cells do not arrest at G2 and proceed to mitosis after application of a sample to be tested. The assay may employ mitotic cell specific monoclonal antibodies. Also provided is a method of identifying phosphorylated proteins involved in the mitotic cycle of a cell in which proteins of a cell treated with a G2 checkpoint inhibitor are compared to proteins of a cell not so treated.

L'invention porte sur des composés inhibant le point de contrôle G2 du cycle cellulaire et qui sont utiles pour sensibiliser les cellules à l'élimination par des agents détériorant l'ADN. L'invention porte également sur un dosage des inhibiteurs du point de contrôle G2, dosage consistant à appliquer un agent détériorant l'ADN sur des cellules qui sont incapables de s'arrêter à G1, mais s'arrêteront à G2 en réaction à l'agent détériorant l'ADN, et à déterminer si les cellules ne s'arrêtent pas à G2 et vont jusqu'à la mitose après application d'un échantillon à tester. On peut utiliser dans le dosage des anticorps monoclonaux spécifiques aux cellules mitotiques. L'invention porte également sur une méthode d'identification de protéines phosphorylées impliquées dans le cycle mitotique d'une cellule, méthode dans laquelle les protéines d'une cellule traitée par un inhibiteur de point de contrôle G2 sont comparées aux protéines d'une cellule non traitée.

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