Mutant jak3 kinase in human leukemia

C - Chemistry – Metallurgy – 12 – N

Patent

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Details

C12N 15/54 (2006.01) C07K 16/40 (2006.01) C12N 9/12 (2006.01) C12Q 1/48 (2006.01) C12Q 1/68 (2006.01) G01N 33/573 (2006.01) G01N 33/574 (2006.01)

Patent

CA 2675534

In accordance with the invention, a novel activating mutation (alanine 572 to valine) in JAK3 kinase has been discovered in human acute myelogenous leukemia (AML). The mutant JAK3 kinase was confirmed to drive the proliferation and survival of acute megakaryoblastic leukemia (AML-M7). The invention therefore provides, in part, isolated polynucleotides and vectors encoding the disclosed mutant JAK3 kinase polypeptides, probes for detecting it, isolated mutant polypeptides, recombinant polypeptides, and reagents for detecting the mutant polypeptides. The disclosed identification of this new mutant protein and enables new methods for determining the presence of mutant JAK3 kinase polypeptides in a biological sample, methods for screening for compounds that inhibit the mutant proteins, and methods for inhibiting the progression of a cancer characterized by the mutant polynucleotides or polypeptides, which are also provided by the invention.

Une nouvelle mutation d'activation (alanine 572 à valine) dans la kinase JAK-3 a été découverte dans la leucémie myéloïde aiguë (AML) chez l'humain. Il a été prouvé que la kinase JAK-3 mutante entraîne la prolifération et la résistance de la leucémie aiguë mégacaryoblastique (AML-M7). L'invention concerne donc, en partie, des polynucléotides isolées et des vecteurs codant les polypeptides de la kinase JAK-3 mutante de l'invention, des sondes pour la détecter, des polypeptides mutants isolés, des polypeptides recombinants et des réactifs pour détecter les polypeptides mutants. Selon l'invention, l'identification de cette nouvelle protéine mutante permet le développement de nouveaux procédés pour déterminer la présence de polypeptides de la kinase JAK-3 mutante dans un échantillon biologique, de procédés pour cribler les composés qui inhibent les protéines mutantes, et de méthodes pour inhiber la progression d'un cancer caractérisé par les polynucléotides ou les polypeptides mutants, sur lesquels porte l'invention.

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