Rna-containing microvesicles and methods therefor

A - Human Necessities – 61 – K

Patent

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Details

A61K 48/00 (2006.01) C07H 21/02 (2006.01) C07H 21/04 (2006.01) C12N 5/00 (2006.01)

Patent

CA 2609260

Contemplated compositions and methods are directed to the use of microvesicles from an optionally recombinant donor cell to impart a desirable effect to a recipient cell. In certain preferred aspects, RNA of the microvesicles is employed to achieve the desirable effect. For example, microvesicles are used in vitro to increase the number of passages of a cell growing in a medium, reduce serum and/or growth factor requirements of a cell growing in a medium, and/or delay differentiation of a cell growing in a medium. Further preferred aspects include use of the microvesicles as therapeutic agents in which RNA, a membrane protein, and/or a cytosolic protein encapsulated in or coupled to the microvesicle provide a therapeutic effect. Additionally, diagnostic methods are contemplated in which RNA of a microvesicle isolated from a mammal is associated with a condition of the mammal.

L'invention concerne des compositions et des méthodes d'utilisation de microvésicules issues d'une cellule donatrice facultativement recombinée, afin de fournir un résultat désiré à une cellule receveuse. Dans certains aspects préférés, l'ARN des microvésicules est utilisé pour obtenir cet effet. Les microvésicules selon l'invention sont utilisées par exemple in vitro pour augmenter le nombre de passages d'une cellule croissant dans un milieu, réduire les besoins en sérum et/ou facteur de croissance d'une cellule croissant dans un milieu et/ou retarder la différenciation d'une cellule croissant dans un milieu. D'autres aspects préférés concernent l'utilisation de ces microvésicules en tant qu'agents thérapeutiques dans lesquels de l'ARN, une protéine membranaire et/ou une protéine cytosolique encapsulé(e) dans la microvésicule ou couplé(e) à celle-ci fournit un effet thérapeutique. L'invention concerne encore des méthodes diagnostiques dans lesquelles l'ARN d'une microvésicule isolée à partir d'un mammifère est associé à un état de ce mammifère.

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