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Beryllium, an adjuvant that promotes gamma interferon production
1Pulmonary, Allergy & Critical Care Division, Department of Medicine, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104-6160, USA.
Infection and Immunity
|June 17, 2000
Summary
Beryllium sulfate (BeSO(4)) acts as an adjuvant, enhancing T helper 1 (Th1) immune responses in mice. This study shows BeSO(4) boosts interferon-gamma (IFN-gamma) production, improving control of Leishmania infection.
Area of Science:
- Immunology
- Toxicology
- Vaccinology
Background:
- Beryllium exposure causes human pulmonary granulomatosis with a T helper 1 (Th1) response.
- Beryllium (Be) has demonstrated adjuvant effects in animal models.
- A BALB/c mouse model typically exhibits a Th2 response to Leishmania antigens.
Purpose of the Study:
- To investigate the adjuvant activity of beryllium sulfate (BeSO(4)) in enhancing Th1 immune responses.
- To determine if BeSO(4) can promote interferon-gamma (IFN-gamma) production in a Leishmania-susceptible mouse model.
- To assess the impact of BeSO(4) on Leishmania infection control.
Main Methods:
- BALB/c mice were sensitized with soluble leishmanial antigens (SLA) and interleukin-12 (IL-12).
- Beryllium sulfate (BeSO(4)) was administered during in vivo sensitization.
- Immune responses (IFN-gamma, IL-4) were measured upon in vitro SLA restimulation.
- Leishmania infection control was assessed in vivo.
Main Results:
- BeSO(4) administration significantly increased IFN-gamma production and decreased IL-4 production.
- No specific immune responses to BeSO(4) alone were observed.
- BeSO(4) enhanced the control of Leishmania infection when administered with SLA and IL-12.
Conclusions:
- Beryllium sulfate acts as an effective adjuvant for promoting Th1 immune responses.
- BeSO(4) demonstrates potential as a vaccine adjuvant, enhancing protective immunity.
- Findings contribute to understanding beryllium-induced granulomatous reactions and adjuvant development.