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Related Experiment Videos

Lymphocyte homing after left or right brain neocortex ablation.

P Barnéoud1, P J Neveu, S Vitiello

  • 1INSERM U.259, Université de Bordeaux II, Domaine de Carreire, France.

Immunology Letters
|March 1, 1990
PubMed
Summary

Brain neocortex lesions affect T cell functions differently based on location. These immune changes are not due to stress-induced hormone redistribution, suggesting a direct brain-immune pathway.

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Area of Science:

  • Neuroimmunology
  • Central nervous system immune modulation
  • Brain-immune interactions

Background:

  • The cerebral neocortex exhibits asymmetrical immune system modulation.
  • Left cortical lesions decrease T cell function, while right lesions may enhance it.
  • Stress-induced glucocorticoids can cause lymphocyte redistribution, potentially explaining cortical lesion effects.

Purpose of the Study:

  • To investigate if glucocorticoids mediate immune changes following brain neocortex lesions.
  • To determine if lymphocyte redistribution underlies the observed immunomodulatory effects of cortical lesions.

Main Methods:

  • Assessing concanavalin A-induced lymphocyte proliferation in lymph nodes and spleen post-lesion.
  • Tracking the distribution of 51Cr-labelled lymph node cells after cortical lesions.

Related Experiment Videos

  • Analyzing blood cell subset percentages following cortical lesioning.

    • Main Results:

    • Cortical lesions similarly modulated lymphocyte proliferation in both lymph nodes and spleen.
    • Lesions on either side did not alter lymphocyte distribution or blood cell subset percentages.
    • Lymphocyte homing was unaffected by cortical lesions.

    Conclusions:

    • Brain neocortex lesions do not impact lymphocyte homing.
    • The immunomodulatory effects of the brain neocortex are unlikely mediated by glucocorticoids.
    • These findings suggest a direct neuro-immune communication pathway independent of stress hormones.