Effects of Lactoferrin and Lactoferricin®on the Release of Interleukin 8 from Human Polymorphonuclear Leukocytes

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Abstract
Human or bovine lactoferrin (LF) and lactoferricin (LFcin), a peptide derived from the N-terminal region of LF, each have the ability to stimulate the release of neutrophil-activating polypeptide interleukin 8 (IL-8) from human polymorphonuclear leukocytes (neutrophils, PMNs). This finding suggests that LF and LFcin may both function as immunomediators for activating the host defense system. A basic peptide, protamine, exerted the same effect as that of LF and LFcin, suggesting the importance of the basic nature of LF and LFcin in acting as an inducer of IL-8 release from PMNs.

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