Mouse strain differences in response to oral immunotherapy for peanut allergy

Area of Science:

• Immunology
• Allergy Research
• Animal Models

Background:

• Emerging food allergy therapies often rely on animal models.
• Variability in mouse strains complicates experimental comparisons.
• Investigating immunological differences between C3H/HeOuJ and BALB/c mice is crucial for assessing peanut-specific immunotherapy efficacy.

Purpose of the Study:

• To determine if immunological differences between C3H and BALB/c mice impact the efficacy of peanut oral immunotherapy (OIT).
• To compare allergic outcomes, antibody production, cytokine profiles, and immune cell responses in two distinct mouse strains undergoing OIT.

Main Methods:

• Peanut extract sensitization followed by three weeks of oral immunotherapy (OIT) in C3H and BALB/c mice.
• Assessment of allergic reactions via intradermal, intragastric, and intraperitoneal challenges.
• Measurement of peanut-specific antibodies, cytokine production, and immune cell populations.

Main Results:

• OIT conferred protection against anaphylaxis in C3H mice, unlike BALB/c mice.
• BALB/c mice showed increased MMCP-1 levels post-OIT, while C3H mice did not.
• IgE levels were significantly higher in BALB/c mice, with OIT inducing IgE post-challenge; C3H mice exhibited higher IgG2a levels.
• MLN lymphocytes from OIT-treated BALB/c mice produced less IL-13 and IL-5, whereas C3H mice showed no significant cytokine changes.

Conclusions:

• C3H mice are more suitable for studying clinical outcomes of OIT.
• BALB/c mice are more appropriate for investigating T cell responses related to OIT.
• Strain-specific differences significantly influence the interpretation of OIT efficacy in preclinical food allergy models.