Process for obtaining stem cells

C - Chemistry – Metallurgy – 12 – N

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C12N 5/0735 (2010.01) C12N 5/071 (2010.01) C12N 5/075 (2010.01) C12N 15/873 (2010.01) A61K 35/48 (2006.01) C12N 5/10 (2006.01) C12Q 1/68 (2006.01)

Patent

CA 2329975

A method of obtaining a stem cell is described, comprising obtaining a somatic cell, which cell contains a gene coding for a marker which is differentially expressed in (a) desired stem cells and (b) cells other than desired stem cells; obtaining an enucleated oocyte; transferring the nucleus of the somatic cell into the enucleated oocyte to form a transgenic oocyte; culturing the transgenic oocyte to produce a culture of cells derived from the transgenic oocyte and identifying a cell of the culture that expresses the marker, thus indicating that the nucleus of that cell has been reprogrammed. Also described are assays for factors that can reprogram nuclei and stem cells obtained directly or indirectly using the nuclear reprogramming methods described.

L'invention concerne un procédé permettant d'obtenir une cellule souche. Ce procédé consiste à obtenir une cellule somatique contenant un gène codant pour un marqueur qui est exprimé de manière différentielle dans (a) les cellules souches requises et (b) les cellules autres que les cellules souches requises. Ce procédé consiste ensuite à obtenir un ovocyte énucléé, à transférer le noyau de la cellule somatique dans l'ovocyte énucléé pour former un ovocyte transgénique puis à cultiver ce dernier ovocyte pour produire une culture de cellules dérivées de l'ovocyte transgénique. Ce procédé consiste enfin à identifier une cellule de la culture exprimant le marqueur, ce qui indique alors que le noyau de cette cellule a été reprogrammé. L'invention traite également de dosages pour des facteurs qui peuvent reprogrammer les noyaux et les cellules souches obtenus directement ou indirectement à l'aide des procédés de reprogrammation nucléaires selon l'invention

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