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A role for neuropeptides in UVB-induced systemic immunosuppression
J Garssen1, T L Buckley, H Van Loveren
1Laboratory for Pathology and Immunobiology, National Institute for Public Health and the Environment, Bilthoven, The Netherlands.
Photochemistry and Photobiology
|September 2, 1998
Summary
Sensory nerves play a role in UV light-induced systemic immunosuppression. UV light failed to suppress immune responses in mice lacking sensory nerves, highlighting their importance in this process.
Area of Science:
- Immunology
- Neuroscience
- Dermatology
Background:
- UV light exposure can suppress immune responses at distant sites (systemic immunosuppression).
- The role of sensory nerves in mediating UV-induced immunosuppression is not fully understood.
Purpose of the Study:
- To investigate the involvement of sensory nerves in UV light-induced systemic immunomodulation.
- To determine the specific role of sensory neuropeptides in this process.
Main Methods:
- Utilized a contact hypersensitivity model using picrylchloride in mice.
- Sensory nerves were depleted using the neurotoxin capsaicin in young mice.
- Mice were pretreated with selective antagonists for neuropeptides like CGRP and tachykinins.
Main Results:
- UV light exposure failed to inhibit contact hypersensitivity in sensory nerve-depleted mice.
- Calcitonin gene-related peptide (CGRP) was identified as a crucial neuropeptide in UV-induced systemic immunosuppression.
- Tachykinins did not appear to play a significant role.
Conclusions:
- Sensory nerves are partially involved in UV light-induced systemic immunosuppression.
- Calcitonin gene-related peptide (CGRP) is a key mediator of this UV-induced immune suppression.