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IgG subclass responses to pigeon intestinal mucin are related to development of pigeon fanciers' lung.
Clin Exp Allergy. 1998 Mar; 28(3):349-57.CE

Abstract

BACKGROUND

Pigeon fanciers' lung (PFL) is a form of extrinsic allergic alveolitis. Affected individuals produce antibodies to various pigeon antigens, and the resulting immune complexes are thought to initiate the disease. However, high antibody titres also occur in some asymptomatic individuals. Previously attention has focused on protein antigens, but we have recently identified pigeon intestinal mucin as a novel antigen in PFL.

OBJECTIVE

To determine the relationship between IgG subclass antibodies to pigeon intestinal mucin and the development of pigeon fanciers' lung.

METHODS

Sera were collected from 250 pigeon fanciers, who also completed a clinical questionnaire. Sera were screened for precipitating antibodies to pigeon serum and droppings. Individuals with symptoms and precipitating antibodies were considered to have classical PFL. Serum IgG and IgG subclass antibodies to pigeon intestinal mucin and pigeon serum proteins were investigated by quantitative enzyme-linked immunosorbent assay (ELISA).

RESULTS

Very high titres of IgG antibodies against pigeon mucin were found in all precipitin-positive individuals. A strong positive correlation was seen between titres of antibodies to mucin and to serum proteins, but this was not due to crossreactivity. No significant differences in IgG titres to either mucin or pigeon serum proteins were found between individuals with PFL and asymptomatic precipitin positive fanciers. IgG1 and IgG2 were the major subclasses of anti-mucin, with lower titres of IgG3. Patients with PFL had significantly higher titres of IgG1 to mucin than asymptomatic, precipitin-positive individuals. In contrast, no significant differences were seen between PFL and asymptomatic precipitin-positive sera with respect to the subclass titres against pigeon serum proteins.

CONCLUSION

The high titres of anti-mucin IgG in sera of all individuals with PFL, together with the finding that high IgG1 titres to mucin are associated with the development of disease confirm pigeon intestinal mucin as an important antigen in PFL.

Authors+Show Affiliations

Department of Immunology, The Medical School, University of Newcastle upon Tyne, UK.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

9543085

Citation

Baldwin, C I., et al. "IgG Subclass Responses to Pigeon Intestinal Mucin Are Related to Development of Pigeon Fanciers' Lung." Clinical and Experimental Allergy : Journal of the British Society for Allergy and Clinical Immunology, vol. 28, no. 3, 1998, pp. 349-57.
Baldwin CI, Todd A, Bourke SJ, et al. IgG subclass responses to pigeon intestinal mucin are related to development of pigeon fanciers' lung. Clin Exp Allergy. 1998;28(3):349-57.
Baldwin, C. I., Todd, A., Bourke, S. J., Allen, A., & Calvert, J. E. (1998). IgG subclass responses to pigeon intestinal mucin are related to development of pigeon fanciers' lung. Clinical and Experimental Allergy : Journal of the British Society for Allergy and Clinical Immunology, 28(3), 349-57.
Baldwin CI, et al. IgG Subclass Responses to Pigeon Intestinal Mucin Are Related to Development of Pigeon Fanciers' Lung. Clin Exp Allergy. 1998;28(3):349-57. PubMed PMID: 9543085.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - IgG subclass responses to pigeon intestinal mucin are related to development of pigeon fanciers' lung. AU - Baldwin,C I, AU - Todd,A, AU - Bourke,S J, AU - Allen,A, AU - Calvert,J E, PY - 1998/5/30/pubmed PY - 1998/5/30/medline PY - 1998/5/30/entrez SP - 349 EP - 57 JF - Clinical and experimental allergy : journal of the British Society for Allergy and Clinical Immunology JO - Clin Exp Allergy VL - 28 IS - 3 N2 - BACKGROUND: Pigeon fanciers' lung (PFL) is a form of extrinsic allergic alveolitis. Affected individuals produce antibodies to various pigeon antigens, and the resulting immune complexes are thought to initiate the disease. However, high antibody titres also occur in some asymptomatic individuals. Previously attention has focused on protein antigens, but we have recently identified pigeon intestinal mucin as a novel antigen in PFL. OBJECTIVE: To determine the relationship between IgG subclass antibodies to pigeon intestinal mucin and the development of pigeon fanciers' lung. METHODS: Sera were collected from 250 pigeon fanciers, who also completed a clinical questionnaire. Sera were screened for precipitating antibodies to pigeon serum and droppings. Individuals with symptoms and precipitating antibodies were considered to have classical PFL. Serum IgG and IgG subclass antibodies to pigeon intestinal mucin and pigeon serum proteins were investigated by quantitative enzyme-linked immunosorbent assay (ELISA). RESULTS: Very high titres of IgG antibodies against pigeon mucin were found in all precipitin-positive individuals. A strong positive correlation was seen between titres of antibodies to mucin and to serum proteins, but this was not due to crossreactivity. No significant differences in IgG titres to either mucin or pigeon serum proteins were found between individuals with PFL and asymptomatic precipitin positive fanciers. IgG1 and IgG2 were the major subclasses of anti-mucin, with lower titres of IgG3. Patients with PFL had significantly higher titres of IgG1 to mucin than asymptomatic, precipitin-positive individuals. In contrast, no significant differences were seen between PFL and asymptomatic precipitin-positive sera with respect to the subclass titres against pigeon serum proteins. CONCLUSION: The high titres of anti-mucin IgG in sera of all individuals with PFL, together with the finding that high IgG1 titres to mucin are associated with the development of disease confirm pigeon intestinal mucin as an important antigen in PFL. SN - 0954-7894 UR - https://www.unboundmedicine.com/medline/citation/9543085/IgG_subclass_responses_to_pigeon_intestinal_mucin_are_related_to_development_of_pigeon_fanciers'_lung_ L2 - https://onlinelibrary.wiley.com/resolve/openurl?genre=article&sid=nlm:pubmed&issn=0954-7894&date=1998&volume=28&issue=3&spage=349 DB - PRIME DP - Unbound Medicine ER -