Journal: Oxidative Medicine and Cellular Longevity
Article Title: Intermittent Hypoxia Affects the Spontaneous Differentiation In Vitro of Human Neutrophils into Long-Lived Giant Phagocytes
Figure Lengend Snippet: Expression of NADPH oxidase subunits in giant phagocytes (G ϕ ) and the effects of NAC on their expression. Freshly isolated PMN were exposed for 24 h to intermittent hypoxia (IH, 56 cycles), sustained hypoxia (SH), or normoxia (N) and then cultured at normoxia for additional six days. NAC (20 μ M) was added to PMN cultures 10 min prior to exposing to N, IH, or SH. Equal volumes of DMSO were added as a negative control. Cytospins were prepared and analyzed by confocal microscopy (see Materials and Methods). The developed G ϕ were stained by double immunofluorescence: (a) for CD66b (red) and gp91- phox (green) in untreated and NAC-treated G ϕ and (b) for gp91- phox (green) and p22- phox (red) in untreated and NAC-treated G ϕ . Nuclei were stained with DAPI. Representative photomicrographs out of 3 independent experiments.
Article Snippet: For intracellular staining, cells were permeabilized with 0.5% Triton X-100 (Sigma-Aldrich, Israel) in PBS, at room temperature for 10 min. After blocking with 10% normal goat serum in RPMI-1640, cells were incubated overnight at 4°C using the following primary Abs (dilution 1 : 100) or the corresponding isotype controls: mouse monoclonal anti-CD66b Abs (80H3, AbD Serotec, Oxford, UK) and anti-cytochrome b-245 light chain (p22- phox identification, Clone 44.1, BioLegend, San Diego, CA), rabbit polyclonal anti-neutrophil elastase (NE) (Calbiochem, San Diego, CA), anti-LC3B Abs (Sigma, Israel), and anti-Nox2/gp91- phox Abs (ab131083, Abcam, UK).
Techniques: Expressing, Isolation, Cell Culture, Negative Control, Confocal Microscopy, Staining, Immunofluorescence