Related Experiment Videos
Modulation of non-specific immunity by hippocampal stimulation
R S Devi1, A Namasivayam, K Prabhakaran
1Department of Physiology, Dr. A.L.M.P.G. Institute of Basic Medical Sciences, University of Madras, Taramani, India.
Journal of Neuroimmunology
|February 1, 1993
Summary
Electrical stimulation of the rat hippocampus altered immune cell counts, increasing neutrophils and decreasing lymphocytes. This stimulation also enhanced phagocytic activity and reduced corticosterone levels.
Area of Science:
- Neuroscience
- Immunology
- Endocrinology
Background:
- Hippocampal electrical stimulation is a technique used to study brain function.
- Immune responses can be modulated by central nervous system activity.
- Stress and inflammation are linked to alterations in white blood cell counts and corticosterone levels.
Purpose of the Study:
- To investigate the effects of hippocampal electrical stimulation on peripheral immune parameters in rats.
- To assess changes in neutrophil and lymphocyte counts, total white blood cell count, phagocytic index, and plasma corticosterone levels.
Main Methods:
- Rats underwent daily hippocampal electrical stimulation for 30 minutes over 4 days.
- Control groups included sham-stimulated and non-stimulated animals.
- Peripheral blood was analyzed for immune cell differentials and phagocytic activity.
- Plasma corticosterone levels were measured.
Main Results:
- Stimulated rats showed increased peripheral neutrophils (P < 0.01) and decreased lymphocytes (P < 0.001) compared to controls.
- Both sham and stimulated groups had reduced total white blood cell counts (P < 0.001) versus controls.
- The phagocytic index significantly increased in stimulated animals (P < 0.001).
- Plasma corticosterone levels were significantly lower in stimulated rats (P < 0.001).
Conclusions:
- Hippocampal electrical stimulation induces significant changes in peripheral immune cell populations.
- The observed increase in phagocytic index suggests enhanced immune cell function.
- Reduced corticosterone levels indicate a potential modulation of the stress response pathway by hippocampal stimulation.