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Ultraviolet light and immunity to coelenterate venom
S Miura1, J W Burnett, L Aurelian
1University of Maryland School of Medicine, Baltimore, USA.
Cutis
|April 1, 1996
Summary
Ultraviolet (UV) light exposure suppresses lymphocyte proliferation in response to venoms and other immune stimuli. This immune modulation by UV radiation may increase susceptibility to venom toxicity.
Area of Science:
- Immunology
- Dermatology
- Toxicology
Background:
- Peripheral blood lymphocytes from sensitized individuals typically proliferate when exposed to naturally occurring venoms.
- Venoms can exert effects through both toxic and immunologic mechanisms.
- Ultraviolet (UV) radiation is known to affect human immunity, particularly circulating T-cells.
Purpose of the Study:
- To investigate the effect of UV exposure on the proliferation of lymphocytes in response to venom.
- To determine if UV-induced immune alterations impact responses to other stimuli.
Main Methods:
- Lymphocyte proliferation assays were performed on sensitized individuals.
- The effect of UV exposure on these proliferation responses was measured.
- Responses to venoms, pathogens, mitogens, and endogenous proteins were assessed post-UV exposure.
Main Results:
- UV exposure significantly decreased lymphocyte proliferation in response to naturally occurring venoms.
- This suppressive effect of UV radiation was broad, affecting responses to pathogens, mitogens, and endogenous proteins.
- UV exposure alters human immunity by affecting circulating T-cells.
Conclusions:
- Ultraviolet exposure broadly suppresses immune responses, including those to venoms.
- The abrogation of normal immune function by UV radiation may enhance the toxic effects of venoms.
- Further research is needed to understand the full implications of UV-induced immunomodulation on venomous creature encounters.