Methods and compositions for measuring biologically active...

A - Human Necessities – 61 – K

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A61K 38/17 (2006.01) A61K 31/69 (2006.01) A61K 38/06 (2006.01) A61K 39/395 (2006.01) C12N 9/50 (2006.01) C12Q 1/37 (2006.01)

Patent

CA 2535971

The present invention describes compositions and methods designed to determine the presence or amount of biologically active natriuretic peptides, or their fragments, in a sample. The degradation of natriuretic peptides is an ongoing process that may be a function of, inter alia, the elapsed time between onset of an event triggering natriuretic peptide release into the tissues and the time the sample is obtained or analyzed; the quantity of proteolytic enzymes present; etc. This degradation can produce circulating amounts of natriuretic peptides having reduced or lost biological function. The present invention provides, inter alia, assays designed to accurately measure biologically active natriuretic peptides, and compositions to inhibit a previously unknown pathway for degradation of natriuretic peptides.

L'invention concerne des compositions et des méthodes permettant de déterminer la présence ou le taux de peptides natriurétiques bioactifs ou leurs fragments dans un échantillon. La dégradation des peptides natriurétiques est un processus continu qui peut être fonction, notamment, du temps écoulé entre un événement déclenchant la libération des peptides natriurétiques dans les tissus et le moment où l'échantillon est obtenu ou analysé ; la quantité d'enzymes protéolytiques présents, etc. Cette dégradation peut produire des taux de peptides natriurétiques en circulation présentant une fonction biologique réduite ou perdue. L'invention concerne notamment des analyses conçues pour mesurer avec précision les peptides natriurétiques bioactifs et des compositions permettant d'inhiber une voie, inconnue jusqu'ici, pour la dégradation des peptides natriurétiques.

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