title: Dysregulation of interleukin 8, interleukin 10, and interleukin 12 release by alveolar macrophages from HIV type 1-infected subjects.
abstract: We examined the in vitro release of interleukin 8 (IL-8), interleukin 10 (IL-10), and interleukin 12 (IL-12) by alveolar macrophages from normal volunteers and HIV-1-infected subjects. Normal volunteers had very low levels of IL-8 and IL-10 and undetectable IL-12 in the cell-free bronchoalveolar lavage fluid (BALF). Asymptomatic HIV-1-infected subjects had elevated levels of IL-8 and IL-10 in their BALF, and HIV-1-infected subjects with nonspecific interstitial pneumonitis (NIP) or infected with Pneumocystis carinii had the highest BALF levels of IL-10 and IL-8. It was found that alveolar macrophages from asymptomatic HIV-1 subjects and from NIP subjects spontaneously released elevated IL-8, IL-10, and IL-12. However, AIDS subjects infected with P. carinii had cells that released elevated levels of IL-10 and IL-8, but low levels of IL-12. When alveolar macrophages were stimulated with Staphylococcus aureus Cowan (SAC), cells from normal volunteers responded with a considerably increased release of IL-8, IL-10, and IL-12; cells from HIV-1-infected subjects without P. carinii infection responded with a moderate increase in release of all three monokines. SAC stimulation did not enhance the release of monokines by cells from AIDS subjects with P. carinii infection, and IL-12 levels remained low. There was no strict relationship between spontaneous cytokine release and p24 HIV-1 antigen expression by alveolar macrophages. Finally, we showed that neutralizing IL-10 production by alveolar macrophages from AIDS subjects substantially increased IL-12 releasability.(ABSTRACT TRUNCATED AT 250 WORDS)
authors.affiliation: Pulmonary Research Unit, University of Sherbrooke, Quebec, Canada.
authors.forename: M
authors.initials: M
authors.lastname: Denis
authors.forename: E
authors.initials: E
authors.lastname: Ghadirian
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000150:complications / Q000378:metabolism*; D001992:Bronchoalveolar Lavage Fluid / Q000821:virology; D015750:Genes, gag; D016655:HIV Core Protein p24 / Q000378:metabolism; D015497:HIV-1 / Q000276:immunology*; D006801:Humans; D016753:Interleukin-10 / Q000096:biosynthesis / Q000276:immunology / Q000378:metabolism*; D018664:Interleukin-12 / Q000378:metabolism*; D016209:Interleukin-8 / Q000096:biosynthesis / Q000378:metabolism*; D008070:Lipopolysaccharides / Q000494:pharmacology; D017563:Lung Diseases, Interstitial / Q000378:metabolism; D016676:Macrophages, Alveolar / Q000378:metabolism* / Q000473:pathology / Q000821:virology; D013211:Staphylococcus aureus / Q000502:physiology
chemical_list: D016655:HIV Core Protein p24; D016209:Interleukin-8; D008070:Lipopolysaccharides; D016753:Interleukin-10; D018664:Interleukin-12