ANTIBODIES SPECIFICALLY BINDING TO MASP-3 FOR THE TREATMENT OF VARIOUS DISEASES AND DISORDERS

1 . A method of inhibiting alternative pathway complement activation in a mammal, the method comprising administering to a mammalian subject in need thereof an amount of a composition comprising a high affinity MASP-3 inhibitory antibody or antigen-binding fragment thereof sufficient to inhibit alternative pathway complement pathway activation in the mammal.

2 . The method of claim 1 , wherein the antibody or antigen binding fragment thereof binds to MASP-3 with an affinity of less than 500 pM.

3 . The method of claim 1 , wherein the antibody or antigen binding fragment thereof binds to the serine protease domain of human MASP-3.

4 . The method of claim 1 , wherein the antibody or antigen-binding fragment thereof inhibits Factor D maturation.

5 . The method of claim 1 , wherein the antibody or antigen binding fragment thereof inhibits the alternative pathway at a molar ratio of from about 1:1 to about 2.5:1 (MASP-3 target to MASP-3 inhibitory mAb).

6 . The method of claim 1 , wherein the antibody or antigen binding fragment thereof selectively inhibits the alternative pathway without affecting the classical pathway activation.

7 . The method of claim 1 , wherein the subject in need thereof is suffering from, or at risk for developing an alternative-pathway disease or disorder selected from the group consisting of: paroxysmal nocturnal hemoglobinuria (PNH), age-related macular degeneration (AMD, including wet and dry AMD), ischemia-reperfusion injury, arthritis, disseminated intravascular coagulation, thrombotic microangiopathy (including hemolytic uremic syndrome (HUS), atypical hemolytic uremic syndrome (aHUS),thrombotic thrombocytopenic purpura (TTP) or transplant-associated TMA), asthma, dense deposit disease, pauci-immune necrotizing crescentic glomerulonephritis, traumatic brain injury, aspiration pneumonia, endophthalmitis, neuromyelitis optica, Behcet's disease, multiple sclerosis, Guillain Barre Syndrome, Alzheimer's disease, amylotrophic lateral sclerosis (ALS), lupus nephritis, systemic lupus erythematosus (SLE), diabetic retinopathy, uveitis, chronic obstructive pulmonary disease (COPD), C3 glomerulopathy, transplant rejection, graft-versus-host disease (GVHD), hemodialysis, sepsis, systemic inflammatory response syndrome (SIRS), acute respiratory distress syndrome (ARDS), ANCA vasculitis, anti-phospholipid syndrome, atherosclerosis, IgA nephropathy and myasthenia gravis.

8 . The method of claim 1 , wherein the MASP-3 inhibitory antibody or antigen binding fragment thereof comprises:

(a) a heavy chain variable region comprising a HC-CDR1 set forth as SEQ ID NO:84, a HC-CDR2 set forth as SEQ ID NO:86 or SEQ ID NO:275, and a HC-CDR3 set forth as SEQ ID NO:88; and a light chain variable region comprising a LC-CDR1 set forth as SEQ ID NO:142, SEQ ID NO:257, SEQ ID NO:258, or SEQ ID NO:259, a LC-CDR2 set forth as SEQ ID NO:144;

and a LC-CDR3 set forth as SEQ ID NO:161;

(b) a heavy chain variable region comprising a HC-CDR1 set forth as SEQ ID NO:72 or SEQ ID NO:79, a HC-CDR2 set forth as SEQ ID NO:74, and a HC-CDR3 set forth as SEQ ID NO:76 or SEQ ID NO:82; and a light chain variable region comprising a LC-CDR1 set forth as SEQ ID NO:153, SEQ ID NO:159, SEQ ID NO:261, SEQ ID NO:262, or SEQ ID NO:263, a LC-CDR2 set forth as SEQ ID NO:155; and a LC-CDR3 set forth as SEQ ID NO:157 or SEQ ID NO:160; or

(c) a heavy chain variable region comprising a HC-CDR1 set forth as SEQ ID NO:56 or SEQ ID NO:62, a HC-CDR2 set forth as SEQ ID NO:58, SEQ ID NO:63, SEQ ID NO:67, or SEQ ID NO:69, and a HC-CDR3 set forth as SEQ ID NO:60 or SEQ ID NO:65; and a light chain variable region comprising a LC-CDR1 set forth as SEQ ID NO:142, SEQ ID NO:149, SEQ ID NO:257, SEQ ID NO:258, or SEQ ID NO:259, a LC-CDR2 set forth as SEQ ID NO:144 and a LC-CDR3 set forth as SEQ ID NO:146.

9 . The method of claim 8 , wherein the MASP-3 inhibitory antibody or antigen binding fragment thereof comprises:

(a) a heavy chain variable region comprising a HC-CDR1 set forth as SEQ ID NO:84, a HC-CDR2 set forth as SEQ ID NO:86, and a HC-CDR3 set forth as SEQ ID NO:88; and a light chain variable region comprising a LC-CDR1 set forth as SEQ ID NO:142, a LC-CDR2 set forth as SEQ ID NO:144, and a LC-CDR3 set forth as SEQ ID NO:161;

(b) a heavy chain variable region comprising a HC-CDR1 set forth as SEQ ID NO:84, a HC-CDR2 set forth as SEQ ID NO:275, and a HC-CDR3 set forth as SEQ ID NO:88; and a light chain variable region comprising a LC-CDR1 set forth as SEQ ID NO:142, a LC-CDR2 set forth as SEQ ID NO:144, and a LC-CDR3 set forth as SEQ ID NO:161;

(c) a heavy chain variable region comprising a HC-CDR1 set forth as SEQ ID NO:84, a HC-CDR2 set forth as SEQ ID NO:86, and a HC-CDR3 set forth as SEQ ID NO:88; and a light chain variable region comprising a LC-CDR1 set forth as SEQ ID NO:258, a LC-CDR2 set forth as SEQ ID NO:144, and a LC-CDR3 set forth as SEQ ID NO:161; or

(d) a heavy chain variable region comprising a HC-CDR1 set forth as SEQ ID NO:84, a HC-CDR2 set forth as SEQ ID NO:275, and a HC-CDR3 set forth as SEQ ID NO:88; and a light chain variable region comprising a LC-CDR1 set forth as SEQ ID NO:258, a LC-CDR2 set forth as SEQ ID NO:144, and a LC-CDR3 set forth as SEQ ID NO:161.

10 . The method of claim 8 , wherein the MASP-3 inhibitory antibody or antigen binding fragment thereof comprises:

(a) a heavy chain variable region comprising a HC-CDR1 set forth as SEQ ID NO:72, a HC-CDR2 set forth as SEQ ID NO:74, and a HC-CDR3 set forth as SEQ ID NO:76; and a light chain variable region comprising a LC-CDR1 set forth as SEQ ID NO:153, a LC-CDR2 set forth as SEQ ID NO:155; and a LC-CDR3 set forth as SEQ ID NO:157;

(b) a heavy chain variable region comprising a HC-CDR1 set forth as SEQ ID NO:72, a HC-CDR2 set forth as SEQ ID NO:74, and a HC-CDR3 set forth as SEQ ID NO:76; and a light chain variable region comprising a LC-CDR1 set forth as SEQ ID NO:263, a LC-CDR2 set forth as SEQ ID NO:155; and a LC-CDR3 set forth as SEQ ID NO:157; or

(c) a heavy chain variable region comprising a HC-CDR1 set forth as SEQ ID NO:79, a HC-CDR2 set forth as SEQ ID NO:74; and a HC-CDR3 set forth as SEQ ID NO:82; and a light chain variable region comprising a LC-CDR1 set forth as SEQ ID NO:159, a LC-CDR2 set forth as SEQ ID NO:155; and a LC-CDR3 set forth as SEQ ID NO:160.

11 . The method of claim 8 , wherein the MASP-3 inhibitory antibody or antigen binding fragment thereof comprises:

(a) a heavy chain variable region comprising a HC-CDR1 set forth as SEQ ID NO:56, a HC-CDR2 set forth as SEQ ID NO:58, and a HC-CDR3 set forth as SEQ ID NO:60; and a light chain variable region comprising a LC-CDR1 set forth as SEQ ID NO:142, a LC-CDR2 set forth as SEQ ID NO:144 and a LC-CDR3 set forth as SEQ ID NO:146;

(b) a heavy chain variable region comprising a HC-CDR1 set forth as SEQ ID NO:56, a HC-CDR2 set forth as SEQ ID NO:58, and a HC-CDR3 set forth as SEQ ID NO:60; and a light chain variable region comprising a LC-CDR1 set forth as SEQ ID NO:258, a LC-CDR2 set forth as SEQ ID NO:144 and a LC-CDR3 set forth as SEQ ID NO:146;

(c) a heavy chain variable region comprising a HC-CDR1 set forth as SEQ ID NO:62, a HC-CDR2 set forth as SEQ ID NO:63, and a HC-CDR3 set forth as SEQ ID NO:65; and a light chain variable region comprising a LC-CDR1 set forth as SEQ ID NO:149, a LC-CDR2 set forth as SEQ ID NO:144 and a LC-CDR3 set forth as SEQ ID NO:146;

(d) a heavy chain variable region comprising a HC-CDR1 set forth as SEQ ID NO:62, a HC-CDR2 set forth as SEQ ID NO:67, or SEQ ID NO:69, and a HC-CDR3 set forth as SEQ ID NO:65; and a light chain variable region comprising a LC-CDR1 set forth as SEQ ID NO:149, a LC-CDR2 set forth as SEQ ID NO:144 and a LC-CDR3 set forth as SEQ ID NO:146; or

(e) a heavy chain variable region comprising a HC-CDR1 set forth as SEQ ID NO:62, a HC-CDR2 set forth as SEQ ID NO:69, and a HC-CDR3 set forth as SEQ ID NO:65; and a light chain variable region comprising a LC-CDR1 set forth as SEQ ID NO:149, a LC-CDR2 set forth as SEQ ID NO:144 and a LC-CDR3 set forth as SEQ ID NO:146.