Purification of biologically active peptides from milk

C - Chemistry – Metallurgy – 07 – K

Patent

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Details

C07K 1/36 (2006.01) A23J 1/20 (2006.01) C07K 1/16 (2006.01) C07K 1/34 (2006.01)

Patent

CA 2254871

A method of separating a soluble milk component from milk (e.g., in a closed- loop continuous extraction system) is disclosed. The method involves the use of tangential flow filtration across a membrane to form a retentate and a permeate, subjecting the permeate to a capture device to substantially remove the soluble milk component, combining the effluent from the capture device with the original milk sample (retentate), and continuing this procedure until the milk has been sufficiently purified. Preferably, the milk is combined with a chelating agent, such as EDTA, to improve the purification efficiency. This procedure is advantageously employed with milk from transgenic animals which have been genetically altered to express exogenous proteins, such as therapeutic proteins, in their milk.

L'invention a trait à un procédé d'isolation dans du lait d'un composant soluble du lait (dans un système d'extraction en continu à boucle fermée, par exemple). Ce procédé, qui repose sur l'utilisation de filtration tangentielle à travers une membrane, ce qui permet d'obtenir un rétentat et un perméat, consiste à soumettre le perméat à l'action d'un dispositif de capture afin d'enlever, dans une large mesure, le composant soluble du lait, à adjoindre à l'échantillon de lait d'origine (rétentat) l'effluent obtenu par capture et à poursuivre le processus jusqu'à ce que le lait soit suffisamment purifié. On ajoute, de préférence, à ce lait un agent chélateur, tel que l'acide édétique (EDTA), afin d'accroître l'efficacité du processus de purification. On emploie avantageusement ce procédé avec du lait provenant d'animaux transgéniques, modifiés par génie génétique pour être à même d'exprimer dans leur lait des protéines exogènes, des protéines à usage thérapeutique notamment.

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