Continuous centrifugation process for the separation of...

C - Chemistry – Metallurgy – 12 – N

Patent

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C12N 5/00 (2006.01) A61K 35/18 (2006.01) A61K 35/28 (2006.01) B01D 21/26 (2006.01) C12N 1/00 (2006.01) C12Q 1/24 (2006.01) G01N 33/50 (2006.01) G01N 33/569 (2006.01) A61M 1/36 (2006.01) C12N 5/06 (2006.01)

Patent

CA 2140455

A method combining the techniques of immunoaffinity separation and continuous flow centrifugal is provided for selective separation of a nucleated heterogeneous cell population from a heterogeneous cell mixture. The heterogeneous cell mixture is intimately contacted to promote binding thereto by particles having attached a substance that actively binds to a specific desired type of cell out of the cell mixture. The particles are selected so that the sedimentation velocity of the particle/cell conjugate differs sufficiently from those of other cells in the cell mixture to allow its separation by means of a continuous flow cell separator. The method rapidly processes large volumes of cell mixture with the high accuracy expected of immunoaffinity separation and can be used to separate, for example, various types of leukocytes from whole blood, bone marrow concentrate, or a peripheral blood stem cell concentrate; or precursors of lymphokine activated killer cells, tumor infiltrating cells, or activated killer monocytes from lymphocyte or monocyte cell concentrates or from a tissue cell preparation.

Un procédé combinant les techniques de séparation par immuno-affinité et de séparation centrifuge à écoulement continu permet de séparer sélectivement une population de cellules hétérogènes nucléée d'un mélange de cellules hétérogènes. Ce dernier est placé en contact intime, favorisant la liaison, avec des particules auxquelles est fixée une substance qui se lie activement à un type spécifique requis de cellules contenues dans le mélange. Les particules sont choisies de façon que la vitesse de sédimentation particule/cellule diffère suffisamment de celle des autres cellules contenues dans le mélange pour en permettre la séparation par l'intermédiaire d'un séparateur de cellules à écoulement continu. Le procédé permet de traiter rapidement des volumes importants de mélanges de cellules avec la précision élevée attendue de la séparation par immuno-affinité, et peut être utilisé pour séparer, notamment, différents types de leucocytes du sang total, d'un concentré du moelle osseuse ou d'un concentré de cellules souches du sang périphérique; ou des prcurseurs de cellules tueuses activées par lymphokine, des lymphocytes infiltrant les tumeurs, ou des monocytes ou lymphocytes ou d'une préparation de cellules tissulaires.

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