Postharvest storage of Carioca bean (Phaseolus vulgaris L.) did not impair inhibition of inflammation in lipopolysaccharide-induced human THP-1 macrophage-like cells

Abstract Storage can affect the nutritional quality of common bean ( Phaseolus vulgaris ), but little is known about the postharvest effect of storage on inflammation. The aim of this work was to evaluate, in vitro , the effect of postharvest storage-time on inflammation by Carioca beans, Madreperola (MP) and Pontal (PO), stored (0, 3 and 6 months), cooked and subjected to pepsin-pancreatin simulated gastrointestinal digestion. Anti-inflammatory potential was investigated in human THP-1 macrophage-like cells. Commercial storage time did not affect protein concentration, degree of hydrolysis, hydropathicity or antioxidant capacity. All PO hydrolysates reduced tumour necrosis factor-α (TNF- α) (31% on average). MP hydrolysates decreased interleukin 1β (IL-1β) (PO 0: 0.1 mg/mL, 20.7%; PO 0 and 6: 5 mg/mL, 24.8 and 48.2%, respectively) and prostaglandin E-2 (PGE-2) (PO 0: all concentrations, 18% on average; PO 6: 0.1 mg/mL, 18.6%). Carioca beans inhibited inflammation and commercial storage time did not impair physicochemical or biological properties.