Methods of using anti-phospholipase D4 antibodies

1. A method for suppressing an activity of a plasmacytoid dendritic cell in a living organism, comprising administering to the living organism an antibody, or antigen-binding fragment thereof, that binds to human phospholipase D4 (PLD4) protein on the plasmacytoid dendritic cell and suppresses the activity of the plasmacytoid dendritic cell, wherein the activity of the plasmacytoid dendritic cell is production of interferon, survival, or production of interferon and survival, and wherein the antibody or antigen-binding fragment thereof comprises:

a heavy chain variable region comprising a heavy chain CDR1 set forth in SEQ ID NO:2, a heavy chain CDR2 set forth in SEQ ID NO:3, and a heavy chain CDR3 set forth in SEQ ID NO:4, and a light chain variable region comprising a light chain CDR1 set forth in SEQ ID NO:5, a light chain CDR2 set forth in SEQ ID NO:6, and a light chain CDR3 set forth in SEQ ID NO:7;

a heavy chain variable region comprising a heavy chain CDR1 set forth in SEQ ID NO:8, a heavy chain CDR2 set forth in SEQ ID NO:9, and a heavy chain CDR3 set forth in SEQ ID NO:10, and a light chain variable region comprising a light chain CDR1 set forth in SEQ ID NO:11, a light chain CDR2 set forth in SEQ ID NO:12, and a light chain CDR3 set forth in SEQ ID NO:13;

a heavy chain variable region comprising a heavy chain CDR1 set forth in SEQ ID NO:14, a heavy chain CDR2 set forth in SEQ ID NO:15, and a heavy chain CDR3 set forth in SEQ ID NO:16, and a light chain variable region comprising a light chain CDR1 set forth in SEQ ID NO:17, a light chain CDR2 set forth in SEQ ID NO:18, and a light chain CDR3 set forth in SEQ ID NO:19;

a heavy chain variable region comprising a heavy chain CDR1 set forth in SEQ ID NO:20, a heavy chain CDR2 set forth in SEQ ID NO:21, and a heavy chain CDR3 set forth in SEQ ID NO:22, and a light chain variable region comprising a light chain CDR1 set forth in SEQ ID NO:23, a light chain CDR2 set forth in SEQ ID NO:24, and a light chain CDR3 set forth in SEQ ID NO:25;

a heavy chain variable region comprising a heavy chain CDR1 set forth in SEQ ID NO:26, a heavy chain CDR2 set forth in SEQ ID NO:27, and a heavy chain CDR3 set forth in SEQ ID NO:28, and a light chain variable region comprising a light chain CDR1 set forth in SEQ ID NO:29, a light chain CDR2 set forth in SEQ ID NO:30, and a light chain CDR3 set forth in SEQ ID NO:31;

a heavy chain variable region comprising a heavy chain CDR1 set forth in SEQ ID NO:32, a heavy chain CDR2 set forth in SEQ ID NO:33, and a heavy chain CDR3 set forth in SEQ ID NO:34, and a light chain variable region comprising a light chain CDR1 set forth in SEQ ID NO:35, a light chain CDR2 set forth in SEQ ID NO:36, and a light chain CDR3 set forth in SEQ ID NO:37; or

a heavy chain variable region comprising a heavy chain CDR1 set forth in SEQ ID NO:38, a heavy chain CDR2 set forth in SEQ ID NO:39, and a heavy chain CDR3 set forth in SEQ ID NO:40, and a light chain variable region comprising a light chain CDR1 set forth in SEQ ID NO:41, a light chain CDR2 set forth in SEQ ID NO:42, and a light chain CDR3 set forth in SEQ ID NO:43.

2. The method of claim 1 , wherein the antibody or antigen-binding fragment thereof is chimerized.

3. The method of claim 1 , wherein the antibody or antigen-binding fragment thereof is humanized.

4. A method for suppressing an activity of a plasmacytoid dendritic cell in a living organism, comprising administering to the living organism an antibody, or antigen-binding fragment thereof, that binds to human phospholipase D4 (PLD4) protein on the plasmacytoid dendritic cell and suppresses the activity of the plasmacytoid dendritic cell, wherein the activity of the plasmacytoid dendritic cell is production of interferon, survival, or production of interferon and survival, and wherein the antibody or antigen-binding fragment thereof comprises the heavy and light chain complementarity determining regions of the antibody produced by hybridoma mp5B7 deposited as Accession No. NITE BP-1211, hybridoma mp7B4 deposited as Accession No. NITE BP-1212, hybridoma mp13D4 deposited as Accession No. NITE BP-1213, or hybridoma mp13H11 deposited as Accession No. NITE BP-1214.

5. A method for suppressing an activity of a plasmacytoid dendritic cell in a living organism, comprising administering to the living organism an antibody, or antigen-binding fragment thereof, that binds to human phospholipase D4 (PLD4) protein on the plasmacytoid dendritic cell and suppresses the activity of the plasmacytoid dendritic cell, wherein the activity of the plasmacytoid dendritic cell is production of interferon, survival, or production of interferon and survival, and wherein the antibody or antigen-binding fragment thereof comprises an antibody produced by hybridoma mp5B7 deposited as Accession No. NITE BP-1211, hybridoma mp7B4 deposited as Accession No. NITE BP-1212, hybridoma mp13D4 deposited as Accession No. NITE BP-1213, or hybridoma mp13H11 deposited as Accession No. NITE BP-1214, or an antigen-binding fragment thereof.

6. The method of claim 4 , wherein the antibody or antigen-binding fragment thereof is chimerized.

7. The method of claim 4 , wherein the antibody or antigen-binding fragment thereof is humanized.