Allergens/immunology; B-Lymphocytes/immunology; Hypersensitivity/immunology; Mesenchymal Stem Cells/immunology; T-Lymphocytes/immunology; Allergens/pharmacology; B-Lymphocytes/drug effects; B-Lymphocytes/pathology; CD3 Complex/genetics; CD3 Complex/immunology; Cell Communication/immunology; Coculture Techniques; Gene Expression; Granulocytes/drug effects; Granulocytes/immunology; Granulocytes/pathology; HLA-DR Antigens/genetics; HLA-DR Antigens/immunology; Humans; Hypersensitivity/genetics; Hypersensitivity/pathology; Immunoglobulin E/biosynthesis; Interleukin-4/biosynthesis; Interleukin-4/metabolism; Killer Cells, Natural/drug effects; Killer Cells, Natural/immunology; Killer Cells, Natural/pathology; Lymphocyte Activation; Mesenchymal Stem Cells/cytology; Monocytes/drug effects; Monocytes/immunology; Monocytes/pathology; Primary Cell Culture; T-Lymphocytes/drug effects; T-Lymphocytes/pathology