A bioprocess for producing uniform embryoid bodies from...

C - Chemistry – Metallurgy – 12 – N

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C12N 5/073 (2010.01) C12N 5/071 (2010.01) C12N 5/0735 (2010.01) A01K 67/027 (2006.01) C12M 3/02 (2006.01) C12N 15/62 (2006.01)

Patent

CA 2488550

The present inventors identified aggregation of embryonic stem cells and embryoid bodies (EBs) as the cause of the difficulty in generating large numbers of the embryonic stem cells (ES) cell-derived tissues. To counter this, the invention provides a novel bioprocess where aggregation of spheroid- forming cells, such as embryonic stem cells and spheroids, such as EBs is controlled, such as by encapsulation of within a matrix. As a result, EBs can be generated with high efficiency and cultured in high cell density, well- mixed systems. Well-mixed conditions facilitate measurement and control of the bulk media conditions and allow for the use of scalable bioreactor systems for clinical production of tissue. Therefore, the invention enables generation of ES cell-derived tissue on a clinical scale. The invention is also applicable to any spheroid-forming cells and other types of pluripotent cells.

La présente invention concerne l'agrégation de cellules souches embryoniques et de corps embryoïdes (EBs), identifiée comme cause de la difficulté de génération de grandes quantités de tissus cellulaires dérivés de cellules souches embryoniques (ES). Pour y remédier, l'invention propose un nouveau bioprocessus dans lequel l'agrégation de cellules formant des sphéroïdes, par exemple des cellules souches embryoniques et des sphéroïdes, comme les Ebs, est contrôlée, par exemple par encapsulation dans une matrice. Des Ebs peuvent ainsi être générés de manière très efficace et mis en culture dans des systèmes de brassage à haute densité cellulaire. Les conditions de brassage facilitent la mesure et le réglage des conditions de masse, et permettent d'utiliser des systèmes à bioréacteurs échelonnables pour la production clinique de tissus. L'invention permet ainsi la génération de tissus dérivés de cellules ES à échelle clinique. L'invention concerne également tout type de cellules formant des sphéroïdes et d'autres types de cellules multipotentes.

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