Methods for in vitro expansion and transdifferentiation of...

C - Chemistry – Metallurgy – 12 – N

Patent

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Details

C12N 5/071 (2010.01) C12N 5/02 (2006.01) A61K 35/12 (2006.01)

Patent

CA 2487094

This invention relates, e.g., to a method for expanding mammalian acinar cells, comprising culturing the cells in a cell culture system comprising a cell culture medium and a cell attachment surface, under conditions wherein the acinar cells undergo a 3-4 fold expansion together with transdifferentiation into a modified cell phenotype (IP cells) showing characteristics of acinar cells and liver cells. The invention also relates to a method for transforming these IP cells to insulin-producing cells in vitro, comprising culturing the cells in a novel, defined medium. Also disclosed are suitable culture media for performing these methods, isolated cells having the phenotype of IP cells and/or produced by these methods, and kits for performing the methods.

La présente invention concerne, par exemple, une méthode d'expansion de cellules acineuses de mammifères. Ladite méthode consiste à mettre en culture les cellules dans un système de culture cellulaire comprenant un milieu de culture cellulaire et une surface de fixation de cellules, dans des conditions dans lesquelles les cellules acineuses subissent une expansion de l'ordre de 3 à 4 fois ainsi qu'une transdifférentiation en un phénotype cellulaire modifié (cellules IP) présentant des caractéristiques de cellules acineuses et de cellules hépatiques. L'invention concerne également une méthode de transformation, in vitro, desdites cellules IP, en cellules produisant de l'insuline, consistant à mettre en culture les cellules dans un milieu défini, nouveau. L'invention concerne encore des supports de culture appropriés permettant de mettre en oeuvre lesdites méthodes, des cellules isolées présentant le phénotype de cellules IP et/ou produites selon lesdites méthodes, ainsi que des matériels permettant de mettre en oeuvre lesdites méthodes.

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