Preventing the interaction between the cellular adhesion integrin α4β7 and endothelial ligand mucosal addressin cell-adhesion molecule-1 (MAdCAM-1) is a validated strategy for Crohn’s disease and ulcerative colitis treatment. Paragon Therapeutics Inc. and Spyre Therapeutics Inc. have reported preclinical efficacy data on SPY-001, a long-acting monoclonal antibody targeting integrin α4β7.