CTLA4-Ig immunoadhesins
The present application relates to CTLA4-Ig immunoadhesins that target CD80 and CD86, and their use, particularly for therapeutic purposes.
1. An immunoadhesin comprising a first domain comprising a variant CTLA4 as compared to SEQ ID NO:6 and a second domain comprising an IgG Fc region, wherein said CTLA4 variant comprises an amino acid modification selected from the group consisting of T51N, A29H, M53Y, L61E, and K93Q, wherein said variant provides enhanced binding to B7-1 or B7-2 and wherein said variant comprises a combination of substitutions selected from the group consisting of T51N/L61E/K93Q, A29H/T51N/L61E/K93Q, A29H/T51N, T51N/M53Y, and T51N/M53Y/L61E.
2. The immunoadhesin according to claim 1 , wherein said variant comprises a combination of substitutions selected from the group consisting of T51N/L61E/K93Q and A29H/T51N/L61E/K93Q.
3. The immunoadhesin according to claim 1 , wherein said variant CTLA4 protein has an amino acid sequence corresponding to SEQ ID NO:31 or SEQ ID NO:32.
4. The immunoadhesin according to claim 1 , wherein said immunoadhesin has an amino acid sequence corresponding to SEQ ID NO:33, SEQ ID NO:34, SEQ ID NO:37, or SEQ ID NO:38.
5. An immunoadhesin comprising a first domain comprising a variant CTLA4 as compared to SEQ ID NO:6 and a second domain comprising an IgG Fc region, wherein said variant comprises at least one amino acid modification in a native CTLA4, wherein said modification is a substitution at a CTLA4 position selected from the group consisting of 51 and 61, wherein said variant provides enhanced binding to B7-1, B7-2, or both B7-1 and B7-2.
6. The immunoadhesin according to claim 1 , wherein said variant provides enhanced binding to B7-1 and B7-2.
7. The immunoadhesin according claim 1 , wherein said variant comprises the combination of substitutions A29H/T51N.
8. The immunoadhesin according claim 1 , wherein said variant comprises the combination of substitutions T51N/M53Y.
9. The immunoadhesin according claim 1 , wherein said variant comprises the combination of substitutions T51N/M53Y/L61E.
10. The immunoadhesin according claim 2 , wherein said variant comprises the combination of substitutions T51N/L61E/K93Q.
11. The immunoadhesin according claim 2 , wherein said variant comprises the combination of substitutions A29H/T51N/L61E/K93Q.
12. The immunoadhesin according to claim 5 , wherein said modification is a substitution at CTLA4 position 61.
13. The immunoadhesin according to claim 5 , wherein said modification is a substitution at CTLA4 position 51.