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• W2980456327 abstract "Abstract Sickle cell anemia (SCA) is a hemolytic disease in which vaso-occlusion is an important pathophysiological mechanism. The treatment is based on hydroxyurea (HU), which decreases leukocyte counts and increases fetal hemoglobin synthesis. Different cell types are thought to contribute to vaso-occlusion. Nevertheless, the role of monocytes subsets remains unclear. We investigated frequencies of monocytes subsets in blood and their response to HU therapy, testing their ability to express pro-inflammatory molecules and tissue factor (TF). We identified major changes in monocyte subsets, with classical monocytes (CD14 ++ CD16 − ) appearing highly frequent in who were not taking HU, whereas those with patrolling phenotype (CD14 dim CD16 + ) were enriched in individuals undergoing therapy. Additionally, HU decreased the production of TNF-α, IL1-β, IL-6, IL-8 as well as TF by the LPS-activated monocytes. Likewise, frequency of TF-expressing monocytes is increased in patients with previous vaso-occlusion. Moreover, activated monocytes expressing TF produced several pro-inflammatory cytokines simultaneously. Such polyfunctional capacity was dramatically dampened by HU therapy. The frequency of classical monocytes subset was positively correlated with percentage cytokine producing cells upon LPS stimulation. These findings suggest that classical monocytes are the subset responsible for multiple pro-inflammatory cytokine production and possibly drive inflammation and vaso-occlusion in SCA which is damped by HU." @default.
• W2980456327 created "2019-10-25" @default.
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• W2980456327 date "2019-10-15" @default.
• W2980456327 modified "2023-10-14" @default.
• W2980456327 title "Hydroxyurea alters circulating monocyte subsets and dampens its inflammatory potential in sickle cell anemia patients" @default.
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• W2980456327 doi "https://doi.org/10.1038/s41598-019-51339-x" @default.
• W2980456327 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6794261" @default.
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