ILT3 binding molecules and uses therefor
First Claim
1. An isolated antibody that specifically binds ILT3, or an antigen binding fragment of the antibody, selected from the group consisting of:
- a) an antibody or antigen binding fragment comprising the amino acid sequence of SEQ ID NO;
28, except that one or more human framework amino acid residues of the antibody or antigen binding fragment are backmutated to one or more corresponding murine framework amino acid residues of SEQ ID No. 2,b) an antibody or antigen binding fragment comprising the amino acid sequence of SEQ ID NO;
29, except that one or more human framework amino acid residues of the antibody or antigen binding fragment are backmutated to one or more corresponding murine framework amino acid residues of SEQ ID No. 1, andc) an antibody comprising the amino acid sequence of SEQ ID NO;
33 and further comprising the amino acid sequence of SEQ ID NO;
34, except that one or more human framework amino acid residues of the antibody or antigen binding fragment are backmutated to one or more corresponding murine framework amino acid residues of SEQ ID Nos. 1 or 2.
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Accused Products
Abstract
The present invention provides binding molecules that specifically bind to ILT3, e.g., human ILT3 (hILT3), on antigen presenting cells, such as for example, monocytes, macrophages and dendritic cells (DC), e.g., monocyte-derived dendritic cells (MDDC). The binding molecules of the invention are characterized by binding to hILT3 with high affinity and downmodulating immune responses in vitro, e.g., downmodulating alloimmune responses; the production of inflammatory cytokines by dendritic cells, e.g., monocyte-derived dendritic cells (MDDC); the upregulation of costimulatory molecules by DC, e.g., MDDC; and/or calcium flux in monocytes. In addition, the binding molecules upregulate the expression of inhibitory receptors on dendritic cells, e.g., immature dendritic cells. Surprisingly, these same binding molecules which downmodulate immune responses in vitro, are immunostimulatory in vivo. Various aspects of the invention relate to binding molecules, and pharmaceutical compositions thereof. Methods of using the binding molecules of the invention to detect human ILT3 or to modulate human ILT3 activity, either in vitro or in vivo, are also encompassed by the invention.
67 Citations
28 Claims
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1. An isolated antibody that specifically binds ILT3, or an antigen binding fragment of the antibody, selected from the group consisting of:
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a) an antibody or antigen binding fragment comprising the amino acid sequence of SEQ ID NO;
28, except that one or more human framework amino acid residues of the antibody or antigen binding fragment are backmutated to one or more corresponding murine framework amino acid residues of SEQ ID No. 2,b) an antibody or antigen binding fragment comprising the amino acid sequence of SEQ ID NO;
29, except that one or more human framework amino acid residues of the antibody or antigen binding fragment are backmutated to one or more corresponding murine framework amino acid residues of SEQ ID No. 1, andc) an antibody comprising the amino acid sequence of SEQ ID NO;
33 and further comprising the amino acid sequence of SEQ ID NO;
34, except that one or more human framework amino acid residues of the antibody or antigen binding fragment are backmutated to one or more corresponding murine framework amino acid residues of SEQ ID Nos. 1 or 2. - View Dependent Claims (24, 25, 27, 28)
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- 2. An isolated antibody that specifically binds ILT3 or an antigen binding fragment of the antibody, the antibody or antigen binding fragment comprising the amino acid sequence of SEQ ID NO:
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3. An isolated antibody that specifically binds ILT3 or an antigen binding fragment of the antibody, the antibody or antigen binding fragment comprising the amino acid sequence of SEQ ID NO:
- 29.
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4. An isolated antibody that specifically binds ILT3 or an antigen binding fragment of the antibody, the antibody or antigen binding fragment comprising a light chain variable region comprising the amino acid sequence of SEQ ID NO :
- 33 and further comprising a heavy chain variable region comprising the amino acid sequence of SEQ ID NO;
34.
- 33 and further comprising a heavy chain variable region comprising the amino acid sequence of SEQ ID NO;
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14. An isolated antibody that specifically binds ILT3 or an antigen binding fragment of the antibody, the antibody or antigen binding fragment comprising a light chain variable region comprising the amino acid sequence of SEQ ID NO :
- 28 and further comprising a heavy chain variable region comprising the amino acid sequence of SEQ ID NO;
29. - View Dependent Claims (15, 16, 17, 18, 19, 26)
- 28 and further comprising a heavy chain variable region comprising the amino acid sequence of SEQ ID NO;
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20. An isolated antibody that specifically binds ILT3 or an antigen binding fragment of the antibody, the antibody or antigen binding fragment comprising the amino acid sequence of SEQ ID NO:
- 33.
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21. An isolated antibody that specifically binds ILT3 or an antigen binding fragment of the antibody, the antibody or antigen binding fragment comprising the amino acid sequence of SEQ ID NO:
- 34.
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22. An isolated antibody that specifically binds ILT3 or an antigen binding fragment of the antibody, the antibody or antigen binding fragment comprising the amino acid sequence of SEQ ID NO:
- 35.
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23. An isolated antibody that specifically binds ILT3 or an antigen binding fragment of the antibody, the antibody or antigen binding fragment comprising a light chain variable region comprising the amino acid sequence of SEQ ID NO :
- 33 and further comprising a heavy chain variable region comprising the amino acid sequence of SEQ ID NO;
35.
- 33 and further comprising a heavy chain variable region comprising the amino acid sequence of SEQ ID NO;
Specification