Plant extracts and compositions comprising extracellular...

A - Human Necessities – 61 – K

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A61K 36/00 (2006.01) A61P 43/00 (2006.01)

Patent

CA 2437259

The present invention provides a plant derived extract comprising inhibitory activity against one or more extracellular proteases which degrade human tissue matrix. Moreover, the amount of inhibitory activity in an extract can be increased by stressing the plant prior to forming an extract. These extracts are each prepared by a standard process and demonstrate the ability to inhibit one or more extracellular proteases which degrade human tissue matrix. Libraries of extracts can be prepared from stressed and non-stressed plants, wherein each of the extracts demonstrate inhibitory activity against one or more extracellular protease inhibitors. Alternatively, semi-purified and purified inhibitory compounds can be isolated from the extracts following standard procedures. In one aspect, these extracts with inhibitory activity can be used during protein purification to minimize the degradation due to extracellular proteases.

L'invention concerne un extrait végétal présentant une activité inhibitrice contre une ou plusieurs protéases extracellulaires qui dégradent la matrice tissulaire humaine. La quantité d'activité inhibitrice dans un extrait peut être augmentée par application d'un stress à la plante avant de former l'extrait. Ces extraits sont préparés selon un procédé standard et ont la capacité d'inhiber une ou plusieurs protéases extracellulaires qui dégradent la matrice tissulaire humaine. Des banques d'extraits peuvent être préparées à partir de plantes stressées et non stressées, où chaque extrait présente une activité inhibitrice contre une ou plusieurs protéases extracellulaires. D'une autre façon, des composés inhibiteurs semi-purifiés et purifiés peuvent être isolés des extraits selon des procédures standard. Dans un mode de réalisation, ces extraits à activité inhibitrice peuvent être utilisés au cours d'une purification de protéine pour réduire la dégradation causée par les protéases extracellulaires.

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