Recognition of Pneumocystis carinii Antigens by Local Antibody-Secreting Cells following Resolution of P. carinii Pneumonia in Mice

To examine the repertoire of Pneumocystis carinii antigens recognized by antibody-secreting B cells from tracheobronchial lymph nodes isolated immediately following recovery from P. carinii pneumonia, monoclonal antibodies (MAbs) were produced from these cells. In contrast to previous studies of sys...

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Bibliographic Details
Published in:The Journal of infectious diseases 1998-07, Vol.178 (1), p.235-242
Main Authors: Gigliotti, Francis, Garvy, Beth A., Haidaris, Constantine G., Harmsen, Allen G.
Format: Article
Language:English
Subjects:
Analysis of the immune response. Humoral and cellular immunity
Animals
Antibodies, Fungal - immunology
Antibodies, Monoclonal - immunology
Antibody production
Antigens
Antigens, Fungal - immunology
B lymphocytes
B-Lymphocytes - immunology
Biological and medical sciences
Fluorescence
Fundamental and applied biological sciences. Psychology
Fundamental immunology
Fungal Proteins - immunology
gpA protein
Humans
Hybridomas
Immunobiology
Infections
Major Articles
Membrane Glycoproteins - immunology
Mice
Mice, SCID
Molecules
Monoclonal antibodies
Pixels
Pneumocystis - immunology
Pneumocystis carinii
Pneumocystis pneumonia
Pneumonia, Pneumocystis - immunology
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Summary:To examine the repertoire of Pneumocystis carinii antigens recognized by antibody-secreting B cells from tracheobronchial lymph nodes isolated immediately following recovery from P. carinii pneumonia, monoclonal antibodies (MAbs) were produced from these cells. In contrast to previous studies of systemic immunity, P. carinii gpA was not the immunodominant antigen recognized by these B cells. Forty-nine (91%) of 54 P. carinii-specific hybridoma culture supernatants reacted with P. carinii antigens other than gpA. Many of the resulting MAbs recognized a previously uncharacterized antigen expressed on the surface of both cysts and trophozoites. Western blotting using one of the cloned MAbs revealed reactivity with a broad range of antigenic material, with the most intense reactivity in the 50- to 65-kDa region of the blot. The antigens identified by these MAbs merit further investigation regarding protective immunity to P. carinii because they were recognized by B cells in the context of recovery from P. carinii pneumonia.
ISSN:0022-1899
1537-6613
DOI:10.1086/515607