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- W1987085655 abstract "Objective: We have compared the phenotypic and functional changes found in alveolar macrophages recovered from the lungs of 39 HIV-positive individuals with no respiratory disease with those from 33 HIV-positive individuals with pneumonitis and 31 healthy controls. Method: Bronchoalveolar lavage (BAL) cell cytospin preparations were stained using monoclonal antibody immunoperoxidase and double immunofluorescence techniques. Cytokine levels within supernatant BAL were determined using enzyme immunoassay. Results: There were marked differences in alveolar macrophage phenotype between the three groups. In particular, the relative proportion of cells staining RFD1+RFD7–(inducer cells) was reduced in the HIV-positive individuals without respiratory disease. This was correlated with measures of declining systemic immunity. Patients with pneumonitis had the highest levels of measured cytokines [interleukin-1β, tumour necrosis factor-α and transforming growth factor (TGF)-β2], followed by the HIV-positive individuals without respiratory disease. In this latter population a negative correlation was found between active (non-acid dissociated) TGF-β2 and blood CD4 cell count. Conclusions: The differences between the three groups suggest that alterations of potential relevance to the pulmonary immune response are occurring in alveolar macrophages prior to the onset of respiratory disease. This study confirms the importance of investigating asymptomatic HIV-positive individuals." @default.
- W1987085655 created "2016-06-24" @default.
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- W1987085655 date "1997-05-01" @default.
- W1987085655 modified "2023-10-18" @default.
- W1987085655 title "Functionally relevant changes occur in HIV-infected individualsʼ alveolar macrophages prior to the onset of respiratory disease" @default.
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- W1987085655 doi "https://doi.org/10.1097/00002030-199706000-00010" @default.
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