Tuna Muscle Peptide, PTHIKWGD, Inhibits Leukocyte-Mediated Injury and Leukocyte Adhesion to Cultured Endothelial Cells

Abstract

Tuna muscle-derived angiotensin-converting enzyme inhibitory peptide, PTHIKWGD, inhibited the injury of bovine aorta endothelial cells (BAECs) induced by N-formyl-methionyl-leucyl-phenylalanine-activated polymorphonuclear leukocytes and the adhesion of a leukemia cell line, THP-1 cells, to BAECs stimulated by lipopolysaccharides. It is possible that this peptide directly affects BAECs, protecting them from activated leukocytes.