STEM CELL FACTOR ANTIBODIES AND METHODS OF USE THEREOF

1 . An antibody or fragment thereof that specifically binds to stem cell factor (SCF), wherein the antibody comprises a heavy chain and a light chain, the heavy and light chain each comprising three complementarity determining regions (CDRs), comprising:

(i) a heavy chain CDR1 comprising an amino acid sequence according to SEQ ID NO: 1 (SX 2 X 3 MN, wherein X 2 is Q, N, or Y; and X 3 is W or Y);

(ii) a heavy chain CDR2 comprising an amino acid sequence according to SEQ ID NO: 2 (QIYPX 5 DX 7 DX 9 HX 11 NX 13 KFX 16 X 17 , wherein X 5 is E, G, D, or L; X 7 is G, D or N; X 9 is T or I; X 11 is M or Y; X 13 is G, D, or E; X 11 is K, R, N, E, or D; and X 17 is G or T);

(iii) a heavy chain CDR3 comprising an amino acid sequence according to SEQ ID NO: 3 (X 1 NWX 4 GSY, wherein X 1 is S or A; and X 4 is V or D);

(iv) a light chain CDR1 comprising an amino acid sequence according to SEQ ID NO: 4 (X 1 X 2 SQSLLX 8 X 9 DGNTYLN, wherein X 1 is K or H; X 2 is S or A; X 8 is E or D; and X 9 is S, E, Q, A, or G);

(v) a light chain CDR2 comprising an amino acid sequence according to SEQ ID NO: 5 (LVX 3 RX 5 DX 7 , wherein X 3 is D, N, or S; X 5 is L or R; and X 7 is I, D, S, or L); and

(vi) a light chain CDR3 comprising an amino acid sequence according to SEQ ID NO: 6 (WQGX 4 X 5 LPQT, wherein X 4 is T or S; and X 5 is D or H).

2 . The antibody or fragment thereof of claim 1 , comprising:

(i) a heavy chain CDR1 comprising an amino acid sequence according to SEQ ID NO: 7 (SX 2 WMN, wherein X 2 is Q or N);

(ii) a heavy chain CDR2 comprising an amino acid sequence according to SEQ ID NO: 8 (QIYPX 5 DX 7 DX 9 HX 11 NX 13 KFKX 17 , wherein X 5 is E, G, or D; X 7 is G or D; X 9 is T or I; X 13 is G or D; X 11 is M or Y; and X 17 is G or T);

(iii) a heavy chain CDR3 comprising an amino acid sequence according to SEQ ID NO: 9 (SNWX 4 GSY, wherein X 4 is V or D);

(iv) a light chain CDR1 comprising an amino acid sequence according to SEQ ID NO: 10 (KSSQSLLEX 9 DGNTYLN, wherein X 9 is S, E, Q, or A);

(v) a light chain CDR2 comprising an amino acid sequence according to SEQ ID NO: 11 (LVX 3 RLDX 7 , wherein X 3 is D or N; X 7 is I, D, S, or L); and

(vi) a light chain CDR3 according to SEQ ID NO: 6 (WQGX 4 X 5 LPQT, wherein X 4 is T or S; and X 5 is D or H).

3 . The antibody or fragment thereof of claim 1 , comprising:

(i) a heavy chain CDR1, CDR2, and CDR3 according to SEQ ID Nos: 22, 26, and 16, respectively; and a light chain CDR1, CDR2, and CDR3 according to SEQ ID NOs: 71, 90, and 111;

(ii) a heavy chain CDR1, CDR2, and CDR3 according to SEQ ID Nos: 23, 27, and 16, respectively; and a light chain CDR1, CDR2, and CDR3 according to SEQ ID NOs: 71, 91, and 111;

(iii) a heavy chain CDR1, CDR2, and CDR3 according to SEQ ID Nos: 22, 26, and 67, respectively; and a light chain CDR1, CDR2, and CDR3 according to SEQ ID NOs: 71, 92, and 111;

(iv) a heavy chain CDR1, CDR2, and CDR3 according to SEQ ID Nos: 22, 27, and 16, respectively; and a light chain CDR1, CDR2, and CDR3 according to SEQ ID NOs: 71, 92, and 111;

(v) a heavy chain CDR1, CDR2, and CDR3 according to SEQ ID Nos: 23, 28, and 16, respectively; and a light chain CDR1, CDR2, and CDR3 according to SEQ ID NOs: 72, 92, and 111;

(vi) a heavy chain CDR1, CDR2, and CDR3 according to SEQ ID Nos: 22, 27, and 16, respectively; and a light chain CDR1, CDR2, and CDR3 according to SEQ ID NOs: 71, 93, and 112;

(vii) a heavy chain CDR1, CDR2, and CDR3 according to SEQ ID Nos: 22, 28, and 16, respectively; and a light chain CDR1, CDR2, and CDR3 according to SEQ ID NOs: 73, 92, and 111;

(viii) a heavy chain CDR1, CDR2, and CDR3 according to SEQ ID Nos: 22, 29, and 16, respectively; and a light chain CDR1, CDR2, and CDR3 according to SEQ ID NOs: 73, 92, and 111;

(ix) a heavy chain CDR1, CDR2, and CDR3 according to SEQ ID Nos: 22, 30, and 16, respectively; and a light chain CDR1, CDR2, and CDR3 according to SEQ ID NOs: 71, 92, and 111;

(x) a heavy chain CDR1, CDR2, and CDR3 according to SEQ ID Nos: 22, 31, and 16, respectively; and a light chain CDR1, CDR2, and CDR3 according to SEQ ID NOs: 71, 92, and 112;

(xi) a heavy chain CDR1, CDR2, and CDR3 according to SEQ ID Nos: 22, 32, and 16, respectively; and a light chain CDR1, CDR2, and CDR3 according to SEQ ID NOs: 73, 93, and 111;

(xii) a heavy chain CDR1, CDR2, and CDR3 according to SEQ ID Nos: 22, 33, and 16, respectively; and a light chain CDR1, CDR2, and CDR3 according to SEQ ID NOs: 74, 92, and 111;

(xiii) a heavy chain CDR1, CDR2, and CDR3 according to SEQ ID Nos: 24, 34, and 16, respectively; and a light chain CDR1, CDR2, and CDR3 according to SEQ ID NOs: 73, 94, and 111;

(xiv) a heavy chain CDR1, CDR2, and CDR3 according to SEQ ID Nos: 23, 28, and 16, respectively; and a light chain CDR1, CDR2, and CDR3 according to SEQ ID NOs: 73, 94, and 111;

(xv) a heavy chain CDR1, CDR2, and CDR3 according to SEQ ID Nos: 22, 31, and 16, respectively; and a light chain CDR1, CDR2, and CDR3 according to SEQ ID NOs: 73, 92, and 111;

(xvi) a heavy chain CDR1, CDR2, and CDR3 according to SEQ ID Nos: 22, 28, and 16, respectively; and a light chain CDR1, CDR2, and CDR3 according to SEQ ID NOs: 73, 92, and 111;

(xvii) a heavy chain CDR1, CDR2, and CDR3 according to SEQ ID Nos: 22, 27, and 16, respectively; and a light chain CDR1, CDR2, and CDR3 according to SEQ ID NOs: 73, 92, and 111;

(xviii) a heavy chain CDR1, CDR2, and CDR3 according to SEQ ID Nos: 22, 35, and 16, respectively; and a light chain CDR1, CDR2, and CDR3 according to SEQ ID NOs: 74, 92, and 111;

(xix) a heavy chain CDR1, CDR2, and CDR3 according to SEQ ID Nos: 22, 34, and 16, respectively; and a light chain CDR1, CDR2, and CDR3 according to SEQ ID NOs: 71, 92, and 111;

(xx) a heavy chain CDR1, CDR2, and CDR3 according to SEQ ID Nos: 22, 27, and 16, respectively; and a light chain CDR1, CDR2, and CDR3 according to SEQ ID NOs: 75, 92, and 111;

(xxi) a heavy chain CDR1, CDR2, and CDR3 according to SEQ ID Nos: 24, 34, and 16, respectively; and a light chain CDR1, CDR2, and CDR3 according to SEQ ID NOs: 73, 92, and 111;

(xxii) a heavy chain CDR1, CDR2, and CDR3 according to SEQ ID Nos: 22, 36, and 16, respectively; and a light chain CDR1, CDR2, and CDR3 according to SEQ ID NOs: 71, 95, and 111;

(xxiii) a heavy chain CDR1, CDR2, and CDR3 according to SEQ ID Nos: 23, 28, and 16, respectively; and a light chain CDR1, CDR2, and CDR3 according to SEQ ID NOs: 73, 92, and 111;

(xxiv) a heavy chain CDR1, CDR2, and CDR3 according to SEQ ID Nos: 22, 28, and 16, respectively; and a light chain CDR1, CDR2, and CDR3 according to SEQ ID NOs: 73, 96, and 111;

(xxv) a heavy chain CDR1, CDR2, and CDR3 according to SEQ ID Nos: 22, 34, and 16, respectively; and a light chain CDR1, CDR2, and CDR3 according to SEQ ID NOs: 71, 95, and 111;

(xxvi) a heavy chain CDR1, CDR2, and CDR3 according to SEQ ID Nos: 22, 34, and 16, respectively; and a light chain CDR1, CDR2, and CDR3 according to SEQ ID NOs: 79, 90, and 111;

(xxvii) a heavy chain CDR1, CDR2, and CDR3 according to SEQ ID Nos: 22, 34, and 16, respectively; and a light chain CDR1, CDR2, and CDR3 according to SEQ ID NOs: 75, 92, and 111; or

(xxviii) a heavy chain CDR1, CDR2, and CDR3 according to SEQ ID Nos: 22, 27, and 16, respectively; and a light chain CDR1, CDR2, and CDR3 according to SEQ ID NOs: 73, 98, and 111.

4 . The antibody or fragment thereof of claim 1 , wherein the antibody or fragment thereof comprises:

(i) a heavy chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 114 and a light chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 291;

(ii) a heavy chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 115 and a light chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 292;

(iii) a heavy chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 116 and a light chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 293;

(iv) a heavy chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 117 and a light chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 294;

(v) a heavy chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 118 and a light chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 295;

(vi) a heavy chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 119 and a light chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 296;

(vii) a heavy chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 120 and a light chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 297;

(viii) a heavy chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 121 and a light chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 298;

(ix) a heavy chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 122 and a light chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 299;

(x) a heavy chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 123 and a light chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 300;

(xi) a heavy chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 124 and a light chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 301;

(xii) a heavy chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 125 and a light chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 302;

(xiii) a heavy chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 126 and a light chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 303;

(xiv) a heavy chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 127 and a light chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 304;

(xv) a heavy chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 128 and a light chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 305;

(xvi) a heavy chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 129 and a light chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 306;

(xvii) a heavy chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 130 and a light chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 307;

(xviii) a heavy chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 131 and a light chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 308;

(xix) a heavy chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 132 and a light chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 309;

(xx) a heavy chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 133 and a light chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 310;

(xxi) a heavy chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 134 and a light chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 311;

(xxii) a heavy chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 135 and a light chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 312;

(xxiii) a heavy chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 136 and a light chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 313;

(xxiv) a heavy chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 137 and a light chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 314;

(xxv) a heavy chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 149 and a light chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 326;

(xxvi) a heavy chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 156 and a light chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 333;

(xxvii) a heavy chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 158 and a light chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 335; or

(xxviii) a heavy chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 143 and a light chain variable region comprising an amino acid sequence having at least 80% identity to SEQ ID NO: 320.

5 . The antibody or fragment thereof of claim 1 , wherein the antibody or fragment thereof comprises:

(i) a heavy chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 114 and a light chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 291;

(ii) a heavy chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 115 and a light chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 292;

(iii) a heavy chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 116 and a light chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 293;

(iv) a heavy chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 117 and a light chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 294;

(v) a heavy chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 118 and a light chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 295;

(vi) a heavy chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 119 and a light chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 296;

(vii) a heavy chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 120 and a light chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 297;

(viii) a heavy chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 121 and a light chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 298;

(ix) a heavy chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 122 and a light chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 299;

(x) a heavy chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 123 and a light chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 300;

(xi) a heavy chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 124 and a light chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 301;

(xii) a heavy chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 125 and a light chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 302;

(xiii) a heavy chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 126 and a light chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 303;

(xiv) a heavy chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 127 and a light chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 304;

(xv) a heavy chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 128 and a light chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 305;

(xvi) a heavy chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 129 and a light chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 306;

(xvii) a heavy chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 130 and a light chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 307;

(xviii) a heavy chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 131 and a light chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 308;

(xix) a heavy chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 132 and a light chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 309;

(xx) a heavy chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 133 and a light chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 310;

(xxi) a heavy chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 134 and a light chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 311;

(xxii) a heavy chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 135 and a light chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 312;

(xxiii) a heavy chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 136 and a light chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 313;

(xxiv) a heavy chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 137 and a light chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 314;

(xxv) a heavy chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 149 and a light chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 326;

(xxvi) a heavy chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 156 and a light chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 333;

(xxvii) a heavy chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 158 and a light chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 335; or

(xxviii) a heavy chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 143 and a light chain variable region comprising an amino acid sequence having at least 90% identity to SEQ ID NO: 320.

6 . The antibody or fragment thereof of claim 1 , wherein the antibody or fragment thereof comprises:

(i) a heavy chain variable region comprising an amino acid sequence according to SEQ ID NO: 114 and a light chain variable region comprising an amino acid sequence according to SEQ ID NO: 291;

(ii) a heavy chain variable region comprising an amino acid sequence according to SEQ ID NO: 115 and a light chain variable region comprising an amino acid sequence according to SEQ ID NO: 292;

(iii) a heavy chain variable region comprising an amino acid sequence according to SEQ ID NO: 116 and a light chain variable region comprising an amino acid sequence according to SEQ ID NO: 293;

(iv) a heavy chain variable region comprising an amino acid sequence according to SEQ ID NO: 117 and a light chain variable region comprising an amino acid sequence according to SEQ ID NO: 294;

(v) a heavy chain variable region comprising an amino acid sequence according to SEQ ID NO: 118 and a light chain variable region comprising an amino acid sequence according to SEQ ID NO: 295;

(vi) a heavy chain variable region comprising an amino acid sequence according to SEQ ID NO: 119 and a light chain variable region comprising an amino acid sequence according to SEQ ID NO: 296;

(vii) a heavy chain variable region comprising an amino acid sequence according to SEQ ID NO: 120 and a light chain variable region comprising an amino acid sequence according to SEQ ID NO: 297;

(viii) a heavy chain variable region comprising an amino acid sequence according to SEQ ID NO: 121 and a light chain variable region comprising an amino acid sequence according to SEQ ID NO: 298;

(ix) a heavy chain variable region comprising an amino acid sequence according to SEQ ID NO: 122 and a light chain variable region comprising an amino acid sequence according to SEQ ID NO: 299;

(x) a heavy chain variable region comprising an amino acid sequence according to SEQ ID NO: 123 and a light chain variable region comprising an amino acid sequence according to SEQ ID NO: 300;

(xi) a heavy chain variable region comprising an amino acid sequence according to SEQ ID NO: 124 and a light chain variable region comprising an amino acid sequence according to SEQ ID NO: 301;

(xii) a heavy chain variable region comprising an amino acid sequence according to SEQ ID NO: 125 and a light chain variable region comprising an amino acid sequence according to SEQ ID NO: 302;

(xiii) a heavy chain variable region comprising an amino acid sequence according to SEQ ID NO: 126 and a light chain variable region comprising an amino acid sequence according to SEQ ID NO: 303;

(xiv) a heavy chain variable region comprising an amino acid sequence according to SEQ ID NO: 127 and a light chain variable region comprising an amino acid sequence according to SEQ ID NO: 304;

(xv) a heavy chain variable region comprising an amino acid sequence according to SEQ ID NO: 128 and a light chain variable region comprising an amino acid sequence according to SEQ ID NO: 305;

(xvi) a heavy chain variable region comprising an amino acid sequence according to SEQ ID NO: 129 and a light chain variable region comprising an amino acid sequence according to SEQ ID NO: 306;

(xvii) a heavy chain variable region comprising an amino acid sequence according to SEQ ID NO: 130 and a light chain variable region comprising an amino acid sequence according to SEQ ID NO: 307;

(xviii) a heavy chain variable region comprising an amino acid sequence according to SEQ ID NO: 131 and a light chain variable region comprising an amino acid sequence according to SEQ ID NO: 308;

(xix) a heavy chain variable region comprising an amino acid sequence according to SEQ ID NO: 132 and a light chain variable region comprising an amino acid sequence according to SEQ ID NO: 309;

(xx) a heavy chain variable region comprising an amino acid sequence according to SEQ ID NO: 133 and a light chain variable region comprising an amino acid sequence according to SEQ ID NO: 310;

(xxi) a heavy chain variable region comprising an amino acid sequence according to SEQ ID NO: 134 and a light chain variable region comprising an amino acid sequence according to SEQ ID NO: 311;

(xxii) a heavy chain variable region comprising an amino acid sequence according to SEQ ID NO: 135 and a light chain variable region comprising an amino acid sequence according to SEQ ID NO: 312;

(xxiii) a heavy chain variable region comprising an amino acid sequence according to SEQ ID NO: 136 and a light chain variable region comprising an amino acid sequence according to SEQ ID NO: 313;

(xxiv) a heavy chain variable region comprising an amino acid sequence according to SEQ ID NO: 137 and a light chain variable region comprising an amino acid sequence according to SEQ ID NO: 314;

(xxv) a heavy chain variable region comprising an amino acid sequence according to SEQ ID NO: 149 and a light chain variable region comprising an amino acid sequence according to SEQ ID NO: 326;

(xxvi) a heavy chain variable region comprising an amino acid sequence according to SEQ ID NO: 156 and a light chain variable region comprising an amino acid sequence according to SEQ ID NO: 333;

(xxvii) a heavy chain variable region comprising an amino acid sequence according to SEQ ID NO: 158 and a light chain variable region comprising an amino acid sequence according to SEQ ID NO: 335; or

(xxviii) a heavy chain variable region comprising an amino acid sequence according to SEQ ID NO: 143 and a light chain variable region comprising an amino acid sequence according to SEQ ID NO: 320.

7 . The antibody or fragment thereof of claim 1 , wherein the antibody or fragment thereof is a monoclonal antibody, a Fab, F(ab′) 2 , Fab′, scFv, or a single domain antibody (sdAb).

8 . The antibody or fragment thereof of claim 1 , wherein the antibody or fragment thereof comprises a human IgG1 or IgG4 domain.

9 . The antibody or fragment thereof of claim 8 , comprising an IgG4 domain having a constant heavy domain according to SEQ ID NO: 1441 and a constant light domain according to SEQ ID NO: 1442.

10 . The antibody or fragment thereof of claim 8 , wherein the antibody comprises a human IgG4 domain comprising a S241P mutation at amino acid residue 241 and an L248E mutation at amino acid residue 248, wherein the numbering of the residues is that of the Kabat numbering system.

11 . The antibody or fragment thereof of claim 10 , comprising an IgG4 domain having a constant heavy domain according to SEQ ID NO: 1440 and a constant light domain according to SEQ ID NO: 1442.

12 . The antibody or fragment thereof of claim 1 , comprising a heavy chain amino acid sequence of any one of SEQ ID NOs: 892-914, 926, 933, 935, and 920 and a light chain amino acid sequence of any one of SEQ ID NOs: 1029-1051, 1063, 1070, 1072, and 1057.

13 . The antibody or fragment thereof of claim 1 , comprising a heavy chain amino acid sequence of any one of SEQ ID NOs: 618-640, 652, 659, 661, and 646 and a light chain amino acid sequence of any one of SEQ ID NOs: 755-777, 789, 796, 798, and 783.

14 . The antibody or fragment thereof of claim 1 , comprising an amino acid sequence of any one of SEQ ID NOs: 481-503 and 515, 522, 524, and 509.

15 . The antibody or fragment thereof of claim 1 , wherein the antibody has a binding affinity for SCF of 50 nM or less.

16 . The antibody or fragment thereof of claim 1 , wherein the antibody has a binding affinity for SCF of 10 nM or less.

17 . The antibody or fragment thereof of claim 1 , wherein the antibody has a binding affinity for SCF of 5 nM or less.

18 . The antibody or fragment thereof of claim 1 , wherein the antibody or fragment thereof blocks the interaction between SCF and c-Kit.

19 . The antibody or fragment thereof of claim 1 , wherein the antibody or fragment thereof causes internalization of SCF.

20 . The antibody or fragment thereof of claim 1 , wherein the antibody or fragment thereof specifically binds to SCF248.

21 . The antibody or fragment thereof of claim 1 , wherein the antibody or fragment thereof does not bind to SCF220.

22 . An isolated nucleic acid molecule encoding the antibody or fragment thereof of claim 1 .

23 . An expression vector comprising a nucleic acid segment encoding the antibody or fragment thereof of claim 1 .

24 . A recombinant host cell comprising the expression vector of claim 23 .

25 . A method for inhibiting inflammation or fibrosis in a subject in need thereof, the method comprising administering to the subject an antibody or fragment thereof according to claim 1 .

26 . A method for treating a chronic inflammatory disease or a fibrotic disease in a subject in need thereof, the method comprising administering to the subject an antibody according to claim 1 .

27 . The method of claim 26 , wherein the chronic inflammatory disease or fibrotic disease is selected from the group consisting of urticaria, atopic dermatitis, non-alcoholic steatohepatitis (NASH), primary sclerosing cholangitis, pulmonary fibrosis, chronic obstructive pulmonary disease (COPD), acute respiratory distress syndrome (ARDS), cystic fibrosis, peribronchial fibrosis, hypersentitivity pneumonitis, asthma, bleomycin lung, scleroderma, liver cirrhosis, endomyocardial fibrosis, fibromyalgia, eosinophilic esophagitis, inflammatory bowel disease (IBD), chronic kidney disease (CKD), end stage renal disease (ERSD), renal fibrosis, glomerulonephritis, and nephropathy.