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Comparison of asthma phenotypes using different sensitizing protocols in mice.
Yoon-Seok Chang1, Yoon-Keun Kim, Joon-Woo Bahn
1Department of Internal Medicine, College of Medicine, Seoul National University Institute of Allergy and Clinical Immunology, Seoul National University Medical Research Center, Seoul National University Hospital, Seoul, Korea.
The Korean Journal of Internal Medicine
|September 2, 2005
Summary
Comparing asthma induction methods in mice, intraperitoneal ovalbumin (OVA) with alum sensitization weekly for two weeks (IPOA-2) was most effective. This protocol efficiently induced airway hyperresponsiveness and allergic inflammation, crucial for asthma research.
Area of Science:
- Immunology
- Respiratory Medicine
- Animal Models
Background:
- Asthma research relies on animal models to study disease mechanisms.
- Various methods exist to induce asthmatic reactions in mice, but their comparative efficacy is not well-established.
Purpose of the Study:
- To compare the efficiency of different protocols for inducing asthmatic reactions in mice.
- To identify the most effective method for sensitizing mice to ovalbumin (OVA) and inducing allergic airway inflammation.
Main Methods:
- BALB/c mice were sensitized using different ovalbumin (OVA) protocols: intraperitoneal injection with alum (IPOA-2, IPOA-7), without alum (IPO-2, IPO-7), or via inhalation (IHO-10).
- Mice were challenged with OVA inhalation, and airway hyperresponsiveness was measured.
- Bronchoalveolar lavage fluid (BALF) analysis, histology, and OVA-specific IgE/IgG1 levels were assessed.
Main Results:
- The IPOA-2 protocol (weekly intraperitoneal OVA with alum for two weeks) effectively induced airway hyperresponsiveness, BALF eosinophilia, airway inflammation, and OVA-specific IgE/IgG1.
- Other protocols like IPOA-7 and IPO-7 also showed efficacy, but IPO-2 (without alum) and IHO-10 (inhalation) were less effective in inducing a full asthmatic phenotype.
Conclusions:
- Intraperitoneal sensitization with ovalbumin and alum, administered weekly for two weeks (IPOA-2), is the most efficient method for inducing a robust asthmatic reaction in mice.
- This optimized protocol is valuable for future asthma research requiring reliable animal models.