Abstract：
:Inhalation of high concentrations of zinc oxide (ZnO) particles may cause metal fume fever. A useful tool to characterize the reactivity of innate immune cells of an individual, e.g., after in vivo exposure, is the whole blood assay (WBA). The measurable outcome of WBA is the release of cytokines, especially pro-inflammatory and pyrogenic cytokines induced by stimulation in vitro. The aim of the study was to evaluate whether inhalation of nano-sized zinc oxide particles modifies the results of WBA from healthy blood donors. Sixteen healthy subjects were exposed to filtered air and ZnO particles (0.5, 1.0, and 2.0 mg/m3) for 4 h on four different days. Blood was collected before and 24 h after exposure, and ex vivo stimulation of the whole blood was performed using different endotoxin concentrations. The release of interleukin (IL)-1β and IL-8 after 22-h incubation was quantified with specific immunoassays. The dose-response relationship of ex vivo stimulation with different endotoxin concentrations was not affected by previous ZnO exposure. However, based on the previously established calculation models, changes due to ZnO exposure could be described. The range of cytokine release in WBA was calculated for the whole group of blood donors, for the subgroups of low and high responders (each n = 8), and on the individual level. Most changes were observed after 0.5 mg/m3 ZnO exposure. Higher ZnO exposure did not yield higher effects. We conclude that the effects of inhalation of nano-sized ZnO particles in blood of healthy donors using the WBA could be determined. However, it should be noted that cytokine release as outcome of WBA is not a marker of disease.
journal_name
Adv Exp Med Bioljournal_title
Advances in experimental medicine and biologyauthors
Liebers V,Kendzia B,Monsé C,Jettkant B,Stubel H,Borowitzki G,Hagemeyer O,Brüning T,Merget R,Raulf Mdoi
10.1007/5584_2019_471subject
Has Abstractpub_date
2020-01-01 00:00:00pages
69-81eissn
0065-2598issn
2214-8019journal_volume
1271pub_type
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