Methods and compositions for measuring natriuretic peptides...

C - Chemistry – Metallurgy – 12 – Q

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C12Q 1/68 (2006.01)

Patent

CA 2579802

The present invention describes compositions and methods designed to determine the presence or amount of 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 de procédés permettant de déterminer la présence ou la quantité de peptides natriurétiques 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 leur libération dans les tissus et le moment où l'échantillon est obtenu ou analysé; de la quantité d'enzymes protéolytiques présents, etc. Cette dégradation peut produire des quantités de peptides natriurétiques en circulation présentant une fonction biologique réduite ou perdue. L'invention concerne, notamment des analyses permettant de mesurer avec exactitude les peptides natriurétiques bioactifs, et des compositions destinées à inhiber une voie, encore inconnue, pour la dégradation de ces peptides.

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