Abstract: The present invention is defined by the claims. In particular, the present invention relates to the use of TCR-deficient CAR-Tregs in combination with anti-TCR complex monoclonal antibodies for inducing durable tolerance.

Abstract: Some rare and very severe autoimmune conditions are of hereditary origin such as APECED and IPEX syndrome due to altered negative selection of autoreactive T cells in the thymus or absence of regulatory T cells (Treg). Innovative strategies based on the use of regulatory T cells have been developed. The inventors have now compared 7 different experimental protocols to identify the one allowing to get the most efficacy of Treg to treat Scurfy autoimmune syndrome, a severe autoimmune model mimicking IPEX syndrome. The optimized protocol comprised a preconditioning step using cyclophosphamide and a post-conditioning step using IL-2. Thus, to present invention relates to a method for the treatment of autoimmunity in patient in need thereof comprising the steps of i) administering the patient with an amount of cyclophosphamide, ii) then engrafting the patient with an amount of the population of Treg cells, and iii) finally administering the patient with an amount of IL-2.

Abstract: The present invention is in the field of graft versus host disease treatment and relates to a composition for use in the treatment of acute Graft-versus-Host Disease (GVHD) in a transplantation recipient after allogenic transplantation with at least one solid organ and/or hematopoietic cells (HC) from a human leucocyte antigen (HLA)-mismatched transplantation donor.