Biomaterial Database

Local antibodies against Pneumocystis carinii in bronchoalveolar lavage fluid. 1994

A L Laursen, and B N Jensen, and P L Andersen

Dept of Medicine and Infectious Diseases, Marselisborg Hospital, University of Aarhus, Denmark.

Pneumocystis carinii pneumonia (PCP) is a frequent cause of pneumonia among human immunodeficiency virus (HIV)-infected patients. Little is known, however, about the role played by humoral immunity to control the infection. This study was undertaken to elucidate the role played by local antibodies. Bronchoalveolar lavage (BAL) fluids from 18 acquired immune deficiency syndrome (AIDS) patients with PCP, 20 HIV-antibody positive patients without PCP, and 20 lung cancer patients were examined for antibodies against P. carinii by the indirect immunofluorescence method. The ratio of albumin concentration in BAL fluid to serum was used to standardize the lavage fluids. Immunoglobulin G (IgG) antibodies against P. carinii occurred less frequently, and immunoglobulin M (IgM) antibodies more frequently, in PCP patients than in other groups. Immunoglobulin A (IgA) antibodies against pneumocysts were found with the same frequency in all three groups, although the median titre was lower among HIV-antibody positive patients without PCP, compared with the other groups. When indexed (antibody titre in BAL fluid x albumin concentration in serum/antibody titre in serum x albumin concentration in BAL fluid) to express locally produced antibodies, IgG indices were significantly higher in HIV-infected patients without PCP, whereas IgM and IgA indices were significantly higher in PCP patients. These findings suggest that the local IgG response is impaired in patients with PCP, whereas the local IgA and, to some extent, the IgM responses are preserved.

UI	MeSH Term	Description	Entries
D007070	Immunoglobulin A	Represents 15-20% of the human serum immunoglobulins, mostly as the 4-chain polymer in humans or dimer in other mammals. Secretory IgA (IMMUNOGLOBULIN A, SECRETORY) is the main immunoglobulin in secretions.	IgA,IgA Antibody,IgA1,IgA2,Antibody, IgA
D007074	Immunoglobulin G	The major immunoglobulin isotype class in normal human serum. There are several isotype subclasses of IgG, for example, IgG1, IgG2A, and IgG2B.	Gamma Globulin, 7S,IgG,IgG Antibody,Allerglobuline,IgG(T),IgG1,IgG2,IgG2A,IgG2B,IgG3,IgG4,Immunoglobulin GT,Polyglobin,7S Gamma Globulin,Antibody, IgG,GT, Immunoglobulin
D007075	Immunoglobulin M	A class of immunoglobulin bearing mu chains (IMMUNOGLOBULIN MU-CHAINS). IgM can fix COMPLEMENT. The name comes from its high molecular weight and originally was called a macroglobulin.	Gamma Globulin, 19S,IgM,IgM Antibody,IgM1,IgM2,19S Gamma Globulin,Antibody, IgM
D008175	Lung Neoplasms	Tumors or cancer of the LUNG.	Cancer of Lung,Lung Cancer,Pulmonary Cancer,Pulmonary Neoplasms,Cancer of the Lung,Neoplasms, Lung,Neoplasms, Pulmonary,Cancer, Lung,Cancer, Pulmonary,Cancers, Lung,Cancers, Pulmonary,Lung Cancers,Lung Neoplasm,Neoplasm, Lung,Neoplasm, Pulmonary,Pulmonary Cancers,Pulmonary Neoplasm
D008297	Male		Males
D008875	Middle Aged	An adult aged 45 - 64 years.	Middle Age
D011020	Pneumonia, Pneumocystis	A pulmonary disease in humans occurring in immunodeficient or malnourished patients or infants, characterized by DYSPNEA, tachypnea, and HYPOXEMIA. Pneumocystis pneumonia is a frequently seen opportunistic infection in AIDS. It is caused by the fungus PNEUMOCYSTIS JIROVECII. The disease is also found in other MAMMALS where it is caused by related species of Pneumocystis.	P carinii Pneumonia,P. carinii Pneumonia,P. jirovecii Pneumonia,PCP Pneumonia,Pneumocystis Pneumonia,Pneumocystosis,Pneumonia, Interstitial Plasma Cell,PCP Infection,Pneumocystis carinii Pneumonia,Pneumocystis jirovecii Pneumonia,Pneumonia, Pneumocystis carinii,Infection, PCP,P carinii Pneumonias,P. carinii Pneumonias,P. jirovecii Pneumonias,PCP Infections,PCP Pneumonias,Pneumocystis Pneumonias,Pneumocystoses,Pneumonia, P carinii,Pneumonia, P. carinii,Pneumonia, P. jirovecii,Pneumonia, PCP,Pneumonia, Pneumocystis jirovecii,Pneumonias, PCP
D001992	Bronchoalveolar Lavage Fluid	Washing liquid obtained from irrigation of the lung, including the BRONCHI and the PULMONARY ALVEOLI. It is generally used to assess biochemical, inflammatory, or infection status of the lung.	Alveolar Lavage Fluid,Bronchial Lavage Fluid,Lung Lavage Fluid,Bronchial Alveolar Lavage Fluid,Lavage Fluid, Bronchial,Lavage Fluid, Lung,Pulmonary Lavage Fluid,Alveolar Lavage Fluids,Bronchial Lavage Fluids,Bronchoalveolar Lavage Fluids,Lavage Fluid, Alveolar,Lavage Fluid, Bronchoalveolar,Lavage Fluid, Pulmonary,Lavage Fluids, Alveolar,Lavage Fluids, Bronchial,Lavage Fluids, Bronchoalveolar,Lavage Fluids, Lung,Lavage Fluids, Pulmonary,Lung Lavage Fluids,Pulmonary Lavage Fluids
D006679	HIV Seropositivity	Development of neutralizing antibodies in individuals who have been exposed to the human immunodeficiency virus (HIV/HTLV-III/LAV).	AIDS Seroconversion,AIDS Seropositivity,Anti-HIV Positivity,HIV Antibody Positivity,HIV Seroconversion,HTLV-III Seroconversion,HTLV-III Seropositivity,AIDS Seroconversions,AIDS Seropositivities,Anti HIV Positivity,Anti-HIV Positivities,Antibody Positivities, HIV,Antibody Positivity, HIV,HIV Antibody Positivities,HIV Seroconversions,HIV Seropositivities,HTLV III Seroconversion,HTLV III Seropositivity,HTLV-III Seroconversions,HTLV-III Seropositivities,Positivities, Anti-HIV,Positivities, HIV Antibody,Positivity, Anti-HIV,Positivity, HIV Antibody,Seroconversion, AIDS,Seroconversion, HIV,Seroconversion, HTLV-III,Seroconversions, AIDS,Seroconversions, HIV,Seroconversions, HTLV-III,Seropositivities, AIDS,Seropositivities, HIV,Seropositivities, HTLV-III,Seropositivity, AIDS,Seropositivity, HIV,Seropositivity, HTLV-III
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man