Process of purification of amyloid fibrils

C - Chemistry – Metallurgy – 07 – K

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C07K 14/47 (2006.01) C12N 9/12 (2006.01)

Patent

CA 2451473

A method of purifying amyloid fibrils comprises treating a sample containing the fibrils with a protease, detergent, chemical denaturant or chaotrope. The amyloid fibrils may then be collected from the treated sample. The treatment is preferably carried out under conditions which allow digestion, degradation or denaturation of amorphous aggregates and soluble precursors in the sample but which do not digest, degrade or denature the amyloid fibrils. A homogonous preparation of amyloid fibrils is provided in which fibrils comprise at least 80 % by weight of protein in the sample.

L'invention concerne un procédé de purification de fibrilles amyloïdes consistant à traiter un échantillon de fibrilles avec une protéase, un détergent, un dénaturant chimique ou un agent chaotrope. Les fibrilles amyloïdes sont ensuite prélevées de l'échantillon ainsi traité. De préférence, le traitement est exécuté dans des conditions qui permettent la digestion, la dégradation ou la dénaturation d'agrégats amorphes et de précurseurs solubles contenus dans l'échantillon tout en préservant les fibrilles amyloïdes de ces phénomènes. L'invention permet ainsi d'obtenir une préparation homogène de fibrilles amyloïdes dans laquelle les fibrilles contiennent au moins 80 % en poids de protéines de l'échantillon.

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