Related Experiment Videos
Aerosolized antigen dose-response studies in asthmatic monkeys
The Journal of Laboratory and Clinical Medicine
|August 1, 1978
Summary
Rhesus monkeys showed airway desensitization after a threshold antigen challenge (TAC), unlike a single antigen challenge (SAC). Repeat challenges revealed varied responses, suggesting a new asthma model for drug evaluation.
Area of Science:
- Immunology
- Respiratory Medicine
- Animal Models
Background:
- Asthma involves IgE-mediated airway responses.
- Standardized methods for evaluating asthma drug efficacy are needed.
- Rhesus monkeys exhibit consistent respiratory responses to allergens.
Purpose of the Study:
- To investigate airway responses in rhesus monkeys using different antigen challenge methods.
- To explore the potential of a threshold antigen challenge (TAC) model for asthma research.
- To evaluate the impact of repeat challenges on airway reactivity.
Main Methods:
- Rhesus monkeys were exposed to aerosolized antigen A at increasing concentrations.
- A threshold antigen concentration (TAC) was determined for each animal.
- Single antigen challenges (SAC) and repeat challenges were compared.
- Airway responses were measured to assess reactivity.
Main Results:
- TAC induced airway desensitization, with some animals not responding to subsequent SAC.
- Individual animals exhibited varied threshold concentrations for airway responses.
- Repeat challenges at threshold concentrations generally elicited a greater response than initial ones.
- Repeat SACs resulted in diminished responses compared to initial challenges.
Conclusions:
- Threshold antigen challenge (TAC) may induce acute airway desensitization in rhesus monkeys.
- Rhesus monkey models can be used to study IgE-mediated airway responses.
- This model offers potential for developing new methods to evaluate asthma pharmacologic inhibitors.