ArticleAntioxidants (Basel, Switzerland)2026
From By-Product to Bioactive: New Antioxidant and Bioavailable Peptides Derived from Milk Permeate Targeting the Nrf2/Keap1 Pathway in Intestinal Cell Models.
Article in Antioxidants (Basel, Switzerland), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
This study investigates the antioxidant properties of several synthetic peptides derived from milk proteins previously identified in milk permeate, a by-product of the dairy industry. The aim of the research is to identify which peptides present in milk permeate are responsible for its antioxidant activity. A comprehensive experimental strategy was employed to evaluate their antioxidant potential, including in silico selection, in vitro free radical scavenging assays and cellular models using Caco-2 and HCT116 cell lines. The peptides were screened using a molecular docking approach for their potential interaction with the Kelch-like ECH-associated protein 1/nuclear factor erythroid 2-related factor 2 (Keap1/Nrf2) pathway, and eight out of twenty-eight were selected and synthesized for further analyses. In vitro, six of the selected peptides demonstrated significant direct antioxidant activity in the DPPH scavenging assay, and two in the ABTS scavenging test. In cellular environments, three peptides (LPAPELGPRQA, LPIIQKLEPQI and NGQVWEESLKRL) effectively protect cells from oxidative stress induced by
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