Effects of lactoferrin on the immune response modified by the immobilization stress

Area of Science:

• Immunology
• Stress Physiology
• Pharmacology

Background:

• Immobilization stress (IS) significantly suppresses cellular and humoral immune responses.
• Psychic stress can profoundly impact physiological systems, including the immune system.
• Lactoferrin (LF) is a protein with known immunomodulatory properties.

Purpose of the Study:

• To investigate the effects of orally administered lactoferrin (LF) on immune responses in mice subjected to immobilization stress (IS).
• To determine if LF can mitigate the immunosuppressive effects of long-term IS.
• To examine LF's influence on immune responses during short-term IS.

Main Methods:

• Mice were subjected to long-term or short-term immobilization stress.
• Lactoferrin was administered to mice in their drinking water.
• Immune responses were assessed by measuring antibody-forming cells (AFC) in the spleen and delayed-type hypersensitivity (DTH) reactions.
• Transforming growth factor beta (TGF-beta) production was measured in mesenteric lymph node cells.

Main Results:

• Long-term IS significantly suppressed immune responses, an effect attenuated by LF.
• LF administration lowered the elevated DTH response in mice exposed to short-term IS.
• LF up-regulated spontaneous transforming growth factor beta (TGF-beta) production in mesenteric lymph node cells from short-term stressed mice.

Conclusions:

• Lactoferrin exhibits regulatory effects on immune responses modified by psychic stress.
• LF may protect against stress-induced immunosuppression.
• These findings support LF's potential role in managing stress-related immune dysregulation.