Neuropeptides in the immunomodulation: Substance p-induced stimulation of immune response in mice

The effects of substance P (SP) and its new structural analog EC-1 administered systemically to CBA mice on the immune responsiveness have been examined. Three main findings are presented in this study. First, the principal effect of SP and EC-1 on the immunity is a stimulatory one. It is shown that...

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Bibliographic Details
Published in:International journal of immunopharmacology 1997-09, Vol.19 (9), p.529-533
Main Authors: Cheido, Margarita, Idova, Galina
Format: Article
Language:English
Subjects:
Adjuvants, Immunologic - pharmacology
Animals
Antigens - administration & dosage
Dopamine - physiology
Dopamine Antagonists - pharmacology
dopaminergic system
Haloperidol - pharmacology
Hemolytic Plaque Technique
hypophysis
Hypothalamo-Hypophyseal System - drug effects
Hypothalamo-Hypophyseal System - immunology
Hypothalamo-Hypophyseal System - physiology
Immunization
immunogenesis
Male
Mice
Mice, Inbred CBA
Neuroimmunomodulation
Neuropeptides - immunology
Neuropeptides - pharmacology
Neuropeptides - physiology
Rosette Formation
Spleen - cytology
Spleen - immunology
Substance P - analogs & derivatives
Substance P - pharmacology
Substance P - physiology
tachykinins
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Summary:The effects of substance P (SP) and its new structural analog EC-1 administered systemically to CBA mice on the immune responsiveness have been examined. Three main findings are presented in this study. First, the principal effect of SP and EC-1 on the immunity is a stimulatory one. It is shown that in the doses of 1, 10 and 100 mkg/kg of the body weight both neuropeptides significantly increased the number of plaque-and rosette-forming cells in the spleen of animals at the peak of the immune reactions. Second, the destruction of the pituitary stalk prevented the immune response stimulation caused by neuropeptides. Third, SP-induced immunostimulation was not observed after combination with the antagonist of the postsynaptic dopamine (DA) D-2 receptors haloperidol (2 mg/kg) suggesting the involvement of the DAergic system in the realization of this effect. Thus, these results demonstrate neurochemical DAergic mechanisms underlying the immunostimulating influence of tachykinins.
ISSN:0192-0561
1879-3495
DOI:10.1016/S0192-0561(97)00078-7