Provided are modified isolated ADAM10 modulating peptides and methods of using the same to modulate ADAM10 biological activities, inhibit ADAM10 biological activities associated with diseases, disorders, or conditions in subjects, including but not limited to decreasing inflammation and inhibiting undesirable cell proliferation. In some embodiments, the modified isolated ADAM10 modulating peptides are based on SEQ ID NO: 3 or SEQ ID NO: 4, and in some embodiments include modifications at or near the N-terminal and/or the C-terminal ends of the disclosed peptides as well as substitutions, insertions, and deletions at one or more amino acid positions of the ADAM10 prodomain peptides disclosed herein.
