Methods and compositions related to modulating the...

A - Human Necessities – 61 – K

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Details

A61K 38/47 (2006.01) A61K 31/726 (2006.01) A61K 31/727 (2006.01) C12N 5/06 (2006.01)

Patent

CA 2594013

This invention relates, in part, to methods and compositions that modulate the stem cell environment. More specifically, the invention relates, in part, to methods and compositions for modulating stem cell differentiation. Such modulation, in some aspects of the invention, is accomplished by agents that modulate glycosaminoglycans in the stem cell microenvironment (i.e., at or on the cell surface and/or in the extracellular matrix). Therefore, methods and compositions are provide for modulating glycosaminoglycan moieties, e.g., heparan sulfate glycosaminoglycan (HSGAG) moieties, in the microenvironment of stem cells. Methods and compositions for promoting or inhibiting embryonic stem cell differentiation (e.g., differentiation into endothelial cells) are also provided. This invention also relates, therefore, in part, to cell populations (e.g., endothelial cell populations or impoverished endothelial cell populations) that can be produced with the methods and compositions provided. Furthermore, the invention relates, in part, to tissues, and uses thereof, formed by the methods and compositions provided. Moreover, the invention also relates, in part, to methods of treatment using the methods and compositions provided.

L'invention concerne, de façon générale, des méthodes et des compositions modulant l'environnement de cellules souches. Elle concerne, plus particulièrement, des méthodes et des compositions servant à moduler la différentiation des cellules souches. Cette modulation, selon quelques uns des aspects de l'invention, est effectuée par des agents modulant les glycosaminoglycanes dans le micro-environnement des cellules souches (à savoir, au niveau de la surface cellulaire et/ou dans la matrice extracellulaire). Elle concerne, de ce fait, des méthodes et des compositions servant à moduler des fractions de glycosaminoglycane, par exemple, des fractions de glycosaminoglycane de sulfate d'héparane (HSGAG), dans le micro-environnement de cellules souches. Elle concerne également des méthodes et des compositions servant à promouvoir ou à inhiber la différentiation des cellules souches embryonnaires, par exemple, leur différentiation en cellules endothéliales. Elle concerne également, par conséquent, des populations cellulaires, par exemple, des populations de cellules endothéliales ou des populations de cellules endothéliales appauvries, pouvant être produites au moyen de ces méthodes et compositions. Elle concerne, de plus et en partie, des tissus, ainsi que leurs utilisations, obtenus au moyen de ces méthodes de ces compositions. Elle concerne enfin des méthodes de traitement mettant en application ces méthodes et ces compositions.

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