PMID- 16686380 OWN - NLM STAT- MEDLINE DCOM- 20061129 LR - 20171116 IS - 1050-6586 (Print) IS - 1050-6586 (Linking) VI - 20 IP - 2 DP - 2006 Mar-Apr TI - Signals through CD40 play a critical role in the pathophysiology of Schistosoma mansoni egg antigen--induced allergic rhinitis in mice. PG - 165-9 AB - BACKGROUND: Interaction between CD40 and CD40L is thought to regulate immune responses in several allergic diseases. However, little is known about its in vivo role in the pathophysiology of allergic rhinitis. We sought to determine whether the lack of signals through CD40 affects the pathophysiology of allergic rhinitis using a murine model. METHODS: Wild type (WT) and CD40-deficient BALB/c (CD40-/-) mice were sensitized intranasally to Schistosoma mansoni egg antigen (SEA). After repeated sensitization, histamine responsiveness, serum antibody titer including immunoglobulin E (IgE), nasal eosinophilia, and cytokine production by nasal mononuclear cells were determined in each group. RESULTS: Intranasal sensitization with SEA in WT mice elicited a strong Th2 response including SEA-specific IgE production, nasal eosinophilia, and interleukin (IL)-4, and IL-5 production by nasal mononuclear cells after antigen challenge. Production of SEA-specific IgE and IgG1 was abolished in SEA-sensitized CD40-/- mice. These mice showed impaired nasal eosinophilia and displayed markedly reduced histamine-induced nasal hyperresponsiveness as compared with WT mice. Furthermore, reduced production of IL-4 and IL-5 by nasal mononuclear cells was seen in CD40-/- mice. CONCLUSION: These results show that signals through CD40 play a critical role in not only IgE production but also pathophysiology of allergic rhinitis such as nasal hyperresponsiveness and nasal eosinophilia. FAU - Hattori, Hisashi AU - Hattori H AD - Department of Microbiology, The Ohio State University, Columbus, Ohio 43210, USA. FAU - Okano, Mitsuhiro AU - Okano M FAU - Kariya, Shin AU - Kariya S FAU - Nishizaki, Kazunori AU - Nishizaki K FAU - Satoskar, Abhay R AU - Satoskar AR LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't PL - United States TA - Am J Rhinol JT - American journal of rhinology JID - 8807268 RN - 0 (Antigens, Helminth) RN - 0 (CD40 Antigens) RN - 0 (Cytokines) RN - 0 (Immunoglobulin G) RN - 37341-29-0 (Immunoglobulin E) SB - IM MH - Animals MH - Antigens, Helminth/*adverse effects/*immunology MH - CD40 Antigens/*immunology/metabolism MH - Cytokines/biosynthesis/immunology MH - Disease Models, Animal MH - Eosinophilia/immunology/metabolism/physiopathology MH - Female MH - Immunization MH - Immunoglobulin E/biosynthesis/immunology MH - Immunoglobulin G/biosynthesis/immunology MH - Leukocytes, Mononuclear/immunology/metabolism MH - Mice MH - Mice, Inbred BALB C MH - Nasal Mucosa/immunology/metabolism/physiopathology MH - Rhinitis, Allergic, Perennial/etiology/*immunology/metabolism/*physiopathology MH - Schistosoma mansoni/*immunology EDAT- 2006/05/12 09:00 MHDA- 2006/12/09 09:00 CRDT- 2006/05/12 09:00 PHST- 2006/05/12 09:00 [pubmed] PHST- 2006/12/09 09:00 [medline] PHST- 2006/05/12 09:00 [entrez] PST - ppublish SO - Am J Rhinol. 2006 Mar-Apr;20(2):165-9.