IL1B and rheumatoid arthritis: Mangiferin, a polyphenolic compound found in mangoes, used in an in vivo study on RA-induced DBA-1/J male mice reported downregulation of IL-1β, IL-6, and TNF-α, inhibited NF-κβ signaling, and activated extracellular signal regulated kinase 1/2 (ERK1/2) (112).