Figure 2.

HIV-1-induced heterotypic cell fusion with infected Jurkat T cells is relevant in several human tissue macrophages. (A) In situ tissue macrophage infection: Non-inflammatory human synovial explants were incubated with 2 d-infected Jurkat cells during 24 h and processed for immunohistological analyses. Nuclei (DAPI, gray), HIV-p24 (green), CD3 (CD4+ T cell marker, orange), and CD68 (macrophage marker, red). Scale bar, 30 µm. (B and C) Ex vivo infection of purified tissue macrophages: Macrophages isolated from adult broncho-alveolar lavages (B, see also Video 2) or children hyperplasic tonsils (C, see also Video 3) were co-cultured for 24 h with 2-d-infected Jurkat cells pre-loaded with CellTracker (gray) and analyzed by confocal microscopy. Representative confocal microscopy images with HIV-p24 (green), F-actin (phalloidin, red), and nuclei (DAPI, blue). Scale bars, 10 µm (B) and 20 µm (C).

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