Modified t cell receptors and related materials and methods

C - Chemistry – Metallurgy – 07 – K

Patent

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Details

C07K 14/735 (2006.01)

Patent

CA 2700278

The invention is directed to a modified T cell receptor (TCR) comprising an amino acid sequence of a wild-type (WT)TCR with one or more amino acid substitutions in the CDR2 and/or CDR3 regions of the alpha and/or beta chains of the TCR, wherein the modified TCR, as compared to the WT TCR, (i) has an enhanced ability to recognize target cells when expressed by CD4+ T cells and/or CD8+ T cells and (ii) does not exhibit a decrease in antigen specificity when expressed by the CD4+T cells and/or CD8+ T cells. Polypeptides, proteins, nucleic acids, recombinant expression vectors, host cells, populations of cells, antibodies, and pharmaceutical compositions related to the modified TCR also are part of the invention. Further, the invention is directed to methods of treating or preventing a disease in a host and methods of detecting a diseased cell in a host.

La présente invention concerne un récepteur de lymphocyte T (TCR) modifié, comprenant une séquence d'acides aminés d'un TCR du type sauvage (WT) avec une ou plusieurs substitutions d'acides aminés dans les régions CDR2 et/ou CDR3 des chaînes alpha et/ou bêta du TCR. Par rapport au TCR de type sauvage, ledit TCR modifié (i) présente une plus forte aptitude à reconnaître les cellules cibles lorsqu'il est exprimé par des lymphocytes T CD4+ et/ou des lymphocytes T CD8+ et (ii) ne présente pas de diminution de spécificité antigénique lorsqu'il est exprimé par ces lymphocytes T CD4+ et/ou ces lymphocytes T CD8+. Des polypeptides, des protéines, des acides nucléiques, des vecteurs d'expression recombinés, des cellules hôtes, des populations de cellules, des anticorps et des compositions pharmaceutiques associés au TCR modifié font également partie de l'invention. En outre, l'invention concerne des procédés permettant de traiter une maladie ou d'empêcher son apparition chez un hôte ainsi que des procédés permettant de détecter une cellule malade chez un hôte.

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