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- W4313382855 abstract "Abstract Humans and apes are neutrophilic, maintaining high levels (50–70% of circulating leukocytes) of this short-lived, highly reactive cell type (neutrophils), while most primates maintain significantly lower proportions(20–40% circulating leukocytes). Neutrophils are key limiters of bacterial and parasitic infection, amplifying inflammation, phagocytosing and presenting, and trapping invading foreign material, as well as committing bystander tissue damage in these efforts. The comparative neutrophilia of humans, therefore, suggests alterations in neutrophil activities such that higher proportions are both required and tolerated in this species. To address this possibility, we analyzed transcriptomic, and cell physiological responses of neutrophils from humans, and two biomedically important primates, rhesus macaque and common marmoset. Cells were isolated via a density gradient and stimulated with 1ng-1ug of lipopolysaccarhide (LPS) from Escherichia coli K12 or the bacteria itself (MOI 10:1) for 1–3 hours. Transcriptomic responses were captured by RNAseq, and physiological responses [phagocytosis, apoptosis, extracellular trapping (NETing)] by fluorescent microscopy. The species differed strongly the expression of genes in innate immune and cell trafficking pathways. Overall, primates exhibited NETing and apoptosis sensitivity to even the lowest dose of LPS. Humans, however, displayed a unique complement of neutrophil antimicrobial responses - phagocytosing and apoptosising more, while NETing less than the other species. These results suggest inter-species differences in important neutrophil antimicrobial strategies that may impact interpretation of primate biomedical models." @default.
- W4313382855 created "2023-01-06" @default.
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- W4313382855 date "2019-05-01" @default.
- W4313382855 modified "2023-09-23" @default.
- W4313382855 title "Functional comparison of human and non-human primate neutrophil responses" @default.
- W4313382855 doi "https://doi.org/10.4049/jimmunol.202.supp.73.21" @default.
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