title: Conjunctiva-associated lymphoid tissue in avian mucosal immunity.
abstract: Conjunctiva-associated lymphoid tissue's (CALT) role in generating avian mucosal adaptive immunity was measured by analyzing cellular composition, expression of the polymeric immunoglobulin receptor (pIgR), and production of cytokines and antibodies in chickens ocular exposed to a replication-deficient adenovirus of serotype 5 (Ad5). These studies demonstrate that CALT contains B cells, γδ T cells, T helper, and cytotoxic T cells, and a T lymphocyte composition, which more resembles Harderian glands than spleen. CALT-derived lymphocytes contain antigen-specific, IgA-secreting plasma cells and cytokine-producing lymphocytes after ocular Ad5 vaccination. The expression of the pIgR in the CALT's lymphoepithelium emphasizes the importance of mucosal immune protection by paraocular lymphoid tissues. The CALT immune response after ocular Ad5 boosting was influenced by prior high dose in ovo Ad5 priming. Thus, both mucosal and systemic immunization influenced Ad5-induced IFN-γ responses in CALT.
authors.affiliation: Department of Pathobiology, College of Veterinary Medicine, Auburn University, Auburn, AL 36849, USA. vangifw@vetmed.auburn.edu
authors.forename: F W
authors.initials: FW
authors.lastname: van Ginkel
authors.forename: S L
authors.initials: SL
authors.lastname: Gulley
authors.forename: A
authors.initials: A
authors.lastname: Lammers
authors.forename: F J
authors.initials: FJ
authors.lastname: Hoerr
authors.forename: R
authors.initials: R
authors.lastname: Gurjar
authors.forename: H
authors.initials: H
authors.lastname: Toro
mesh_terms: D000256:Adenoviridae / Q000276:immunology; D000818:Animals; D000914:Antibodies, Viral / Q000097:blood; D002645:Chickens / Q000276:immunology*; D003228:Conjunctiva / Q000166:cytology / Q000276:immunology*; D016207:Cytokines / Q000235:genetics / Q000276:immunology; D005434:Flow Cytometry; D006651:Histocytochemistry / Q000662:veterinary; D018928:Immunity, Mucosal / Q000276:immunology*; D007114:Immunization / Q000379:methods / Q000662:veterinary; D007070:Immunoglobulin A / Q000097:blood; D016130:Immunophenotyping / Q000662:veterinary; D008221:Lymphoid Tissue / Q000166:cytology / Q000276:immunology*; D012313:RNA / Q000737:chemistry / Q000235:genetics; D019056:Receptors, Polymeric Immunoglobulin / Q000235:genetics / Q000276:immunology; D020133:Reverse Transcriptase Polymerase Chain Reaction / Q000662:veterinary; D013047:Specific Pathogen-Free Organisms; D018709:Statistics, Nonparametric
chemical_list: D000914:Antibodies, Viral; D016207:Cytokines; D007070:Immunoglobulin A; D019056:Receptors, Polymeric Immunoglobulin; D012313:RNA