Humanized IgE/FcεR1 Mouse Model to Study IgE-Mediated Diseases
Applications: Allergy, autoimmune disease, and inflammation
The humanized IgE/FcεR1 mouse model has been successfully used to screen for innovative therapeutics for allergy, asthma and other IgE-mediated diseases.
hIgE/hFcεR1 model features
- Expression of human IgE and human FcεR1 without expression of their murine counterparts
- Human pattern of expression of hFcεR1 thanks to the use of the human promotor
- Suitable model for passive systemic anaphylaxis and evaluation of anti-hIgE compounds
Request a quote to get pricing, offers and hIgE/hFcεR1 model information by phone or email. |
hIgE/hFcεR1 model validation
A major limit for in vivo studies is the different cellular distribution of the IgE high-affinity receptor. In mice, the IgE high-affinity receptor is not expressed on monocytes/DCs, Langerhans cells, or eosinophils whereas it is in humans.
The model enables the production of a fully human IgE-FcεRI complex combined with a human-like expression of a FcεRI receptor.
Fig. 1) Analysis of human FcεR1 and human IgE expression in double-humanized IgE/FcεR1 mouse cells. |
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A) Expression of hFcεR1-α chain from bone marrow-derived mast cells cultured in presence of murine IL3, SCF, and IL6 for 8 weeks.
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B) Human IgE in serum of mice sensitized and challenged with ovalbumin. (black column: treated; white column: untreated)
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Fig. 2) Functional data on double-humanized IgE/FcεR1 model: Induction of mast cell degranulation by anti-IgE Ab. |
β-hexosaminidase activity in cell supernatant was determined as a percentage of total β-hexosaminidase activity in cell lysates. Conclusion: Mast cells from the humanized model bind human IgE and degranulate upon cross-linking. This is specific and not restricted to given antigen. This set of data validates the functionality of the IgE high-affinity receptor. It binds human IgE and triggers degranulation upon cross-linking. |
Fig. 3) Passive systemic anaphylaxis is inducible in hIgE/hFcER1 mouse model and inhibited by a specific anti-hIgE treatment
The model has been successfully used by Ambiotis, a Contract Research Organization (CRO) providing inflammation assays and lipid analytical services. |
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* For more validation data please contact us.
Ready to be shipped to your lab
- Cohorts available upon request
- Studies can be carried out at your site or at your favorite CRO
- SOPF certification and worldwide delivery by professional breeders
- Models provided with FTO on patent-protected technologies used for model generation