A New Mouse Model for Studying Late-Phase Allergic Reactions
Author Information
Author(s): S. Facincone, A. L. Pereira de Siqueira, S. Jancar, M. Russo, J. A. Marzaga, A. o Barbuto, M. Mariano
Primary Institution: Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
Hypothesis
Can a novel murine model effectively simulate the late-phase reaction of immediate hypersensitivity?
Conclusion
The implantation of coagulated egg white in mice induces a significant late-phase allergic reaction, characterized by intense eosinophil infiltration.
Supporting Evidence
- Footpad swelling was significantly greater in mice immunized with egg white compared to those immunized with ovalbumin plus alum.
- Eosinophil infiltration persisted for more than 14 days after antigen challenge.
- High levels of ovalbumin-specific IgG1 were detected in the serum of immunized mice.
Takeaway
Researchers created a new way to study allergies in mice by using cooked egg white, which caused a strong allergic reaction similar to what happens in people.
Methodology
Mice were immunized with heat-coagulated hen egg white and then challenged with ovalbumin to measure footpad swelling and eosinophil infiltration.
Limitations
The model may not fully replicate human allergic responses due to species differences.
Participant Demographics
Male and female F1 hybrid mice (BALB/c 3 A/J) or BALB/c, A/J, and C57BL mice were used.
Statistical Information
P-Value
p<0.005
Statistical Significance
p<0.005
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