Method for producing isolated cell cultures, culture medium...

C - Chemistry – Metallurgy – 12 – N

Patent

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Details

C12N 5/0797 (2010.01) C12N 5/02 (2006.01)

Patent

CA 2454552

The invention relates to a method for cultivating cell cultures containing a plurality of cells, whereby said method comprises one or several steps including the expansion of the cell culture and the modification of the cells of the cell culture in a culture medium. The aim of the invention is to achieve faster and more regular cultivation in terms of the number of cells present in the culture medium. To achieve this, a cell culture is used, wherein the cells are essentially provided in the form of isolated cells and/or agglomerates with weak cell-cell interactions during said method step. Said interactions can be interrupted by an external influence upon the culture medium without the majority of cells being damaged when they are transferred from the agglomerate to separate single cells. The expansion and/or modification of the cells preferably takes place in culture conditions which at least partially block the cell receptors responsible for creating cell-cell adherences. The culture medium can have a Ca2+ concentration of <= 0.5 mmol/1 and /or inhibitors which are specific to the receptors of the cell membrane of the cells that are responsible for cell-cell interactions.

L'invention concerne un procédé de culture de populations cellulaires comportant une pluralité de cellules. Ce procédé comprend une ou plusieurs étapes parmi lesquelles figurent l'expansion et la modification des cellules de la population cellulaire dans un milieu de culture. L'objectif de l'invention est de développer un procédé de culture cellulaire plus rapide et plus homogène par rapport au nombre de cellules présentes dans le milieu de culture. A cet effet, l'on utilise une population cellulaire dont les cellules sont présentes en grande partie sous la forme de cellules isolées et/ou d'agglomérats de cellules présentant de faibles interactions cellulaires lors du procédé de culture, lesdites interactions cellulaires pouvant être interrompues sous l'effet d'une action extérieure exercée sur le milieu de culture, sans que la majeure partie des cellules soient dégradées lorsqu'elles passent de l'état d'agglomérats à celui de cellules isolées. De préférence, l'expansion et/ou la modification des cellules intervien(nen)t à des conditions de culture bloquant au moins partiellement les récepteurs des cellules qui induisent l'établissement d'adhésions cellule-cellule. Le milieu de culture peut présenter une concentration en Ca?2+¿ inférieure ou égale à 0,5 mmol/l et/ou comporter des inhibiteurs spécifiques des récepteurs membranaires des cellules intervenant dans les interactions cellulaires.

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