Methods and compositions for modulating interleukin-21...

C - Chemistry – Metallurgy – 12 – N

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C12N 15/62 (2006.01) A61K 38/00 (2006.01) A61K 38/17 (2006.01) A61K 38/20 (2006.01) A61K 39/00 (2006.01) A61K 39/39 (2006.01) A61K 45/06 (2006.01) A61P 19/02 (2006.01) A61P 31/00 (2006.01) A61P 35/00 (2006.01) C07K 14/705 (2006.01) C07K 16/18 (2006.01) C07K 19/00 (2006.01) C12N 15/13 (2006.01) C12N 15/24 (2006.01) C12N 15/63 (2006.01) C12P 21/02 (2006.01)

Patent

CA 2460916

Methods and compositions for modulating interleukin-21 (IL-21)/IL-21 receptor (MU-1) activity using agonists or antagonists of IL-21 or IL-21 receptor ("IL- 21R" or "MU-1"), are disclosed. IL-21/IL-21R antagonists can be used to induce immune suppression in vivo, e.g., for treating or preventing immune cell- associated pathologies (e.g., pathologies associated with aberrant activity of one or more of mature T cells (mature CD8+, mature CD4+ T cells), mature NK cells, B cells, macrophages and megakaryocytes, including transplant rejection and autoimmune disorders). IL-21/IL-21R agonists can be used by themselves or in combination with an antigen, e.g., as an adjuvant (e.g., a vaccine adjuvant), to up-regulate an immune response in vivo, e.g., for example, for use in treating cancer and infectious disorders.

L'invention concerne des procédés et des compositions permettant de moduler l'interleukine-21 (IL-21)/le récepteur de l'IL-21 (MU-1) par le biais d'agonistes ou d'antagonistes vis-à-vis de l'IL-21 ou du récepteur de l'IL-21 ("IL-21R" ou "MU-1"). On peut utiliser des antagonistes vis-à-vis de l'IL-21/IL-21R afin d'induire une immunosuppression in vivo, par exemple pour le traitement ou la prévention de pathologies associées aux cellules immunitaires (entre autres, pathologies associées à une activité aberrante d'une ou plusieurs cellules comme les lymphocytes T mûrs (lymphocytes T mûrs CD8+, CD4+ T), les cellules NK mûres, les lymphocytes B, les macrophages et les mégacaryocytes, y compris le rejet du greffon et les maladies autoimmunes). Les agonistes vis-à-vis de l'IL-21/IL-21R peuvent être utilisés seuls ou en combinaison avec un antigène, par exemple sous forme d'adjuvant (notamment, adjuvant de vaccin), pour la régulation positive de réaction immune in vivo, entre autres dans le traitement du cancer et des maladies infectieuses.

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