A balanced brain asymmetry modulates T cell-mediated events

Area of Science:

• Neuroimmunology
• Cerebral Cortex Function
• Immune System Lateralization

Background:

• The cerebral cortex plays a role in modulating immune responses.
• Previous research indicates neocortical influence on Natural Killer (NK) cell activity and T cell factors.

Purpose of the Study:

• To investigate the lateralized effects of cerebral neocortex ablation on T cell-mediated immune responses.
• To determine if brain lateralization extends to immune recognition processes.

Main Methods:

• Partial ablation of the left or right fronto-parietal cerebral cortex in mice.
• Assessment of spleen T cell counts and immune responses including T mitogen-induced responses, IgG-alpha SRBC, and alloantigen responses.
• Control groups included sham-operated mice and mice with unilateral neocortical ablation.

Main Results:

• Ablation of the left fronto-parietal cortex decreased spleen T cells and impaired T cell-mediated immune responses.
• Symmetric lesions in the right neocortex led to increased T cell numbers and enhanced immune responses.
• B cells and macrophages showed no significant changes in response to the lesions.

Conclusions:

• The findings demonstrate a lateralized effect of the cerebral neocortex on T cell immunity.
• This suggests that brain lateralization, typically associated with cognitive functions, also applies to T cell immune recognition at a population level.