IL4 and anaphylaxis: Peanut-specific serum IgG, IgG1 and IgG2a↑, peanut-specific serum IgE↓IL-2 and IFN-γ↑, IL-4 and IL-5↓ in splenocyte culture supernatantsClinical anaphylaxis symptom score and temperature drop upon oral challenge ↓Mast cell protease 1 (MCP-1) and histamine upon oral challenge↓Eosinophil infiltration in small intestine↓