Method of optimizing the treatment of philadelphia-positive...

A - Human Necessities – 61 – K

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Details

A61K 31/506 (2006.01) A61P 35/02 (2006.01)

Patent

CA 2662977

The present invention provides a method of treating Philadelphia positive (Ph+) leukemia, such as Philadelphia chromosome positive acute lymphoblastic leukemia (Ph+ ALL) or chronic myeloid leukemia (CML), in a human patient population comprising the steps of (a) administering a predetermined fixed amount of a Bcr-Abl tyrosine kinase inhibitor, such as Imatinib, or a pharmaceutically acceptable salt thereof to human patients suffering from a Ph+ leukemia, (b) collecting at least one blood sample from said patients, (c) determining the plasma trough level (Cmin) of the Bcr-Abl tyrosine kinase inhibitor or of a metabolite thereof as well as the MMR rates, (d) assessing a discrimination potential of trough plasma concentrations for MMR and identifying a Cmin threshold for optimal sensitivity and specificity and (e) adjusting the dose of the inhibitor of the Bcr-Abl tyrosine kinase or a pharmaceutically acceptable salt thereof applied to the individual patients from said patient population and, optionally, future patients suffering from a Ph+ leukemia in a manner that a Cmin is achieved in each single patient equal to or higher than the Cmin threshold obtained under step (d).

La présente invention concerne un procédé de traitement de la leucémie Philadelphie positive (Ph+), telle que la leucémie lymphoblaste aiguë positive du chromosome de Philadelphie (Ph+ ALL) ou la leucémie myéloïde chronique (LMC), chez un patient humain comprenant les étapes suivantes : (a) l'administration d'une quantité fixe prédéterminée d'un inhibiteur de tyrosine kinase Bcr-Abl, tel que l'imanitib, ou un sel pharmaceutiquement acceptable de celui-ci à des patients humains atteints de la leucémie Ph+, (b) le prélèvement d'au moins un échantillon sanguin desdits patients, (c) la détermination du niveau de la concentration plasmique minimale(Cmin) de l'inhibiteur de tyrosine kinase ou d'un métabolite de celui-ci ainsi que des taux MMR, (d) l'évaluation d'un potentiel de discrimination de concentrations de dépression plasmique pour MMR et l'identification d'un seuil Cmin pour une sensibilité et une spécificité optimales et (e)l'ajustement de la dose de l'inhibiteur de tyrosine kinase Bcr-Abl ou d'un sel pharmaceutiquement acceptable de celui-ci appliqué à des patients individuels parmi ladite population de patients et, éventuellement, des patients futurs atteints de la leucémie Ph+ de sorte qu'une Cmin soit atteint dans chaque patient individuel égal ou inférieur au Cmin seuil obtenu à l'étape (d).

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