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Immunomodulatory activity of 5 kDa permeate fractions of casein hydrolysates generated using a range of enzymes in Jurkat T cells and RAW264.7 macrophages
O'Sullivan, Siobhán M.
O'Callaghan, Yvonne C.
O'Keeffe, Martina B.
FitzGerald, Richard J.
O'Brien, Nora M.
The in vitro bioactivity of 5 kDa ultrafiltration permeate fractions of casein hydrolysates produced using different enzymes were compared. Reverse phase ultra-performance liquid chromatography and gel permeation chromatography showed that the permeates had different physicochemical properties (molecular mass and degree of hydrolysis). The Flavourzyme® permeate had the highest activity in the 2,2’-azinobis(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) assay. Cellular antioxidant and immunomodulatory assays showed that none of the permeates exhibited in vitro antioxidant activity, while all permeates significantly (P < 0.05) decreased interleukin-6 (IL-6) production in ConA-stimulated Jurkat T cells at 0.50% (w/v) and LPS-stimulated RAW264.7 cells at 0.05 and 0.50% (w/v). Three permeates, obtained using Flavourzyme®, Flavorpro Whey and trypsin, also significantly (P < 0.05) decreased IL-1β production at 0.05% (w/v) in RAW264.7 cells. Western blot analysis showed that all permeates significantly decreased the expression of the NF-κB subunit, p65, in RAW264.7 cells indicating that anti-inflammatory activity may be associated with this pathway.
Casein , Bioactivity , Protein hydrolysates , Anti-inflammatory activity , In vitro bioactivity , Casein hydrolysates
O’Sullivan, S. M., O’Callaghan, Y. C., O’Keeffe, M. B., FitzGerald, R. J. and O’Brien, N. M. (2018) 'Immunomodulatory activity of 5 kDa permeate fractions of casein hydrolysates generated using a range of enzymes in Jurkat T cells and RAW264.7 macrophages', International Dairy Journal, In Press, doi: 10.1016/j.idairyj.2018.12.005