ArticleResearch and practice in thrombosis and haemostasis2025
Season-dependent low basal CD86 expression promotes immune cell activation upon treatment with plasma-derived factor Ⅷ products.
Article in Research and practice in thrombosis and haemostasis, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background: The most serious complication in treatment of hemophilia A is the development of factor (F)Ⅷ anti-drug antibodies (ADAs), while immunological danger signals seem to play a critical role in ADA development. Accordingly, we have shown in previous studies that plasma-derived (pd) FⅧ in presence of the bacterial danger signal lipopolysaccharide (LPS) synergistically activates dendritic cells (DCs), which in turn induce proliferation of (FⅧ-specific) CD4 Objectives and Methods: Therefore, we investigated a data pool of 160 donations for DC activation and 265 donations for T-cell proliferation from healthy donors collected by 3 different experimenters between 2012 and 2023 to determine parameters that correlate with pdFⅧ plus LPS-induced immune cell activation. Results: Human immune cells from healthy donors are synergistically activated by pdFⅧ plus LPS. However, neither DC activation nor T-cell proliferation depended on a specific pdFⅧ product, did not correlate with the donor's biological sex, and was not donor- but rather time point-dependent. Analyses of different activation markers revealed seasonal differences in CD86 expression, and low expression correlated with DC activation and tumor necrosis factor-α expression. Conclusion: In fact, we could demonstrate that the meteorological season correlates with the basal CD86 expression on DC. This, in turn, determined the capability of synergistic DC activation and cytokine secretion, as well as partially impacted T-cell proliferation.
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