Immunoregulatory effect of neocortex in mice

Area of Science:

• Neuroscience
• Immunology
• Brain-Immune Interactions

Background:

• The brain's influence on the immune system is complex.
• Hemispheric specialization in the brain is well-documented, but its impact on immune regulation is less understood.

Purpose of the Study:

• To investigate the differential effects of left versus right neocortex ablation on immune responses in mice.
• To explore the phenomenon of brain lateralization in immune system regulation.

Main Methods:

• Neocortex ablation was performed on the left (ALN) or right (ARN) hemisphere of inbred mice.
• Immunological parameters, including mitogenesis, NK cell cytotoxicity, cytokine production (IL-1, IL-2), IL-1 reactivity, and antibody response to SRBC, were assessed two months post-ablation.

Main Results:

• ALN mice exhibited suppressed immune responses, including reduced Con A-induced mitogenesis, NK cytotoxicity, IL-1 and IL-2 production, and IL-1 reactivity.
• ARN mice showed stimulated immune responses, with enhanced mitogenesis, NK cytotoxicity, IL-1 and IL-2 production, IL-1 reactivity, and primary antibody response to SRBC compared to controls.
• Specific immune parameters were differentially affected by the side of neocortical ablation.

Conclusions:

• The findings suggest a lateralization of brain control over the immune system.
• Different neocortical hemispheres may exert distinct regulatory influences on immune cell function and systemic immune responses.
• This study provides evidence for hemispheric lateralization impacting neuro-immune interactions.