Abstract
Human galectin-3 (Gal-3), a β-galactoside binding lectin through its Carbohydrate Recognition Domain (CRD), is implicated in a wide range of cellular functions and is involved in critical biological processes including pathogen recognition, immune response, inflammation and fibrosis. Recently, Gal-3 has gained increasing attention for its role in pathological conditions such as cancer, where it influences cancer growth and progression, inflammatory processes and oxidative stress, opening the search for potential inhibitors. In this context, several naturally derived molecules have attracted particular interest, some of them being used in clinical trials. Here, we used the seeds of the legume Phaseolus coccineus as a green resource for bioactive compounds. The peptide-rich crude extracts were chemically characterized for their peptide and polyphenol contents, as well as their in vitro antioxidant activity, and the powerful obtained extract was tested for biological activities such as cytotoxicity and antioxidant and anti-inflammatory effects on cellular models. Furthermore, the interaction between the crude extract and the CRD of recombinant Gal-3 was verified with the aim of associating its biological effects with the inhibition of Gal-3 activity.