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Chougnet C, Cohen SS, Kawamura T, Landay AL, Kessler HA, Thomas E, Blauvelt A, Shearer GM. Normal Immune Function of Monocyte-Derived Dendritic Cells from HIV-Infected Individuals: Implications for Immunotherapy. THE JOURNAL OF IMMUNOLOGY 1999. [DOI: 10.4049/jimmunol.163.3.1666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Abstract
Dendritic cells (DC) are the most potent cells involved in the generation of primary and secondary immune responses. To assess the feasibility of using autologous DC as immunotherapy for HIV disease, we analyzed a variety of immune parameters using DC isolated from HIV-infected (HIV+) individuals, as well as DC obtained from HIV-uninfected (HIV−) individuals infected in vitro with HIV. After stimulation with recombinant CD40 ligand (CD40LT), cytokine and β-chemokine production were similar by DC from HIV− donors infected in vitro with the CCR5-using HIV Ba-L strain (n = 8) compared with uninfected DC from the same donors. Production of β-chemokines, but not of cytokines, was increased by a CXCR4-using IIIB strain-infected DC (n = 7). Stimulation of HIV-infected DC with CD40LT decreased infection in Ba-L-infected DC, but had no effect on IIIB-infected DC. Consistent with this finding, CD40LT down-regulated CCR5 and up-regulated CXCR4 expression on DC. Monocyte-derived DC were also propagated from 15 HIV+ and 13 HIV− donors. They exhibited similar expression of costimulatory molecules and produced similar amounts of IL-12, IL-10, and β-chemokines, following stimulation. By contrast, stimulated PBMC from HIV+ patients exhibited decreased IL-12 and increased IL-10 production. In summary, phenotype, cytokine secretion, and β-chemokine production by DC from HIV+ individuals were normal. These cells may prove useful in boosting cellular immune responses in HIV+ individuals.
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Affiliation(s)
| | - Sandra S. Cohen
- †Dermatology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892
| | - Tatsuyoshi Kawamura
- †Dermatology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892
| | - Alan L. Landay
- ‡Department of Immunology/Microbiology and Medicine, Rush-Presbyterian-St. Luke’s Medical Center, Chicago, IL 60617; and
| | - Harold A. Kessler
- ‡Department of Immunology/Microbiology and Medicine, Rush-Presbyterian-St. Luke’s Medical Center, Chicago, IL 60617; and
| | | | - Andrew Blauvelt
- †Dermatology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892
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Montaner LJ, da Silva RP, Sun J, Sutterwala S, Hollinshead M, Vaux D, Gordon S. Type 1 and Type 2 Cytokine Regulation of Macrophage Endocytosis: Differential Activation by IL-4/IL-13 as Opposed to IFN-γ or IL-10. THE JOURNAL OF IMMUNOLOGY 1999. [DOI: 10.4049/jimmunol.162.8.4606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
Cytokine regulation of endocytic activity in primary human macrophages was studied to define ultrastructural changes and mechanisms of pinocytic regulation associated with cytokines secreted by activated T cells. The effects of IFN-γ (type 1) and IL-4/IL-13 and IL-10 (type 2) cytokines on fluid phase and mannose receptor-mediated endocytosis were assessed by horseradish peroxidase and colloidal gold-BSA uptake and computer-assisted morphometric analysis. IL-4 and IL-13 enhanced fluid phase pinocytosis and mannose receptor-mediated uptake by activation of phosphatidylinositol 3-kinase. Inhibition of actin assembly showed that both cytokines exerted actin-dependent and -independent effects. Ultrastructurally, IL-4 and IL-13 increased tubular vesicle formation underneath the plasma membrane and at pericentriolar sites, concurrent with decreased particle sorting to lysosomes. By contrast, IL-10 or IFN-γ decreased both fluid phase pinocytosis and mannose receptor-mediated uptake. IFN-γ stimulated increased particle sorting to perinuclear lysosomes, while IL-10 decreased this activity. In summary, our data document differential effects on macrophage endocytic functions by type 1 or type 2 cytokines associated with induction and effector pathways in immunity.
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Affiliation(s)
| | | | - Junwei Sun
- *The Wistar Institute, Philadelphia, PA 19104; and
| | | | - Michael Hollinshead
- †Sir William Dunn School of Pathology, University of Oxford, Oxford, United Kingdom
| | - David Vaux
- †Sir William Dunn School of Pathology, University of Oxford, Oxford, United Kingdom
| | - Siamon Gordon
- †Sir William Dunn School of Pathology, University of Oxford, Oxford, United Kingdom
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