Novel Anti-Sema3a Antibodies And Uses Thereof

The present disclosure relates to an isolated antibody or antigen-binding fragment thereof that binds to human Sema3A. The isolated antibody or antigen-binding fragment according to the present disclosure i) binds to human Sema3A of the sequence of SEQ ID NO: 600 with a dissociation constant (KD)≤50 nM, ≤20 nM, ≤10 nM, ≤1 nM, or ≤0.1 nM; ii) cross-reacts with mouse, cynomolgus, rat, pig and/or dog Sema3A, particularly wherein said isolated antibody or antigen-binding fragment thereof binds to mouse, cynomolgus, rat, pig and/or dog Sema3A with a dissociation constant (KD)≤50 nM, ≤20 nM, ≤10 nM, ≤1 nM, or ≤0.1 nM; iii) binds to human Sema3A of the sequence of SEQ ID NO: 600 with a binding activity as measured by surface plasmon resonance (SPR) of ≥60%, ≥70%, ≥80%, or ≥90%; iv) inhibits the activity of human Sema3A of the sequence of SEQ ID NO: 600 in an in vitro mesangial cell migration assay with an EC50 of ≤10 nM, ≤5 nM, ≤2.5 nM, or ≤1 nM; v) inhibits the activity of human Sema3A of the sequence of SEQ ID NO: 600 in an in vitro growth cone collapse assay with an EC50 of ≤50 nM, ≤25 nM, ≤10 nM, or ≤5 nM; vi) inhibits the activity of human Sema3A of the sequence of SEQ ID NO: 600 in an in vitro HUVEC repulsion assay with an EC50 of ≤1 nM, or ≤0.3 nM, ≤0.1 nM, ≤0.07 nM, ≤0.06 nM and/or vii) exhibits an increased potency against cellular Sema3A, of the sequence of SEQ ID NO: 600, induced HUVEC repulsion.