TD139 is a 3,3′-bis-(4-aryltriazol-1-yl) thio-digalactoside Gal-3 inhibitor with high affinity for the Gal-3 carbohydrate recognition domain that has shown efficacy in murine models of lung fibrosis [6, 15]. The gene discussed is LGALS3; the disease is pulmonary fibrosis.