title: The interaction between ICOS and B7RP-1 is not required for the development of experimental murine allergic conjunctivitis.
abstract: It is still unclear whether the interaction between inducible costimulator (ICOS) and its ligand, B7 related protein (B7RP)-1, is important for the development of allergic diseases. We investigated whether blocking the ICOS/B7RP-1 interaction affects the development of murine experimental allergic conjunctivitis (EC). EC was induced in Balb/c mice either by active immunization of ragweed (RW) or by transferring RW-primed splenocytes, followed by challenge with RW-containing eye drops. The mice were treated with anti-B7RP-1 antibody (Ab) or normal rat immunoglobulin G (IgG) during either the induction or effector phase. Regardless of the induction method or when the animals were treated, eosinophil infiltration into the conjunctiva was not affected by the anti-B7RP-1 Ab treatment. Splenocyte responses were not largely affected by this treatment. However, serum Ig levels were significantly reduced. These data suggest that blocking the ICOS/B7RP-1 in allergic diseases may not always be therapeutic.
authors.affiliation: Department of Ophthalmology, Kochi Medical School, Kohasu, Oko-cho, Nankoku-city 783-8505, Japan. fukusima@med.kochi-u.ac.jp
authors.forename: Atsuki
authors.initials: A
authors.lastname: Fukushima
authors.forename: Tomoko
authors.initials: T
authors.lastname: Yamaguchi
authors.forename: Waka
authors.initials: W
authors.lastname: Ishida
authors.forename: Kazuyo
authors.initials: K
authors.lastname: Fukata
authors.forename: Hideo
authors.initials: H
authors.lastname: Yagita
authors.forename: Hisayuki
authors.initials: H
authors.lastname: Ueno
mesh_terms: D000485:Allergens / Q000276:immunology; D000818:Animals; D000906:Antibodies / Q000494:pharmacology; D000945:Antigens, Differentiation, T-Lymphocyte / Q000494:pharmacology*; D018122:B7-1 Antigen / Q000276:immunology / Q000494:pharmacology*; D003233:Conjunctivitis, Allergic / Q000209:etiology* / Q000276:immunology*; D004347:Drug Interactions; D005260:Female; D007073:Immunoglobulin E / Q000097:blood; D007074:Immunoglobulin G / Q000097:blood; D060945:Inducible T-Cell Co-Stimulator Ligand; D060889:Inducible T-Cell Co-Stimulator Protein; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D011058:Pollen / Q000276:immunology; D013154:Spleen / Q000166:cytology
chemical_list: D000485:Allergens; D000906:Antibodies; D000945:Antigens, Differentiation, T-Lymphocyte; D018122:B7-1 Antigen; C556694:Icos protein, mouse; C556695:Icos protein, rat; D007074:Immunoglobulin G; D060945:Inducible T-Cell Co-Stimulator Ligand; D060889:Inducible T-Cell Co-Stimulator Protein; D007073:Immunoglobulin E