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• W2152934881 abstract "Exposure to psychosocial stress is a risk factor for many diseases, including atherosclerosis. Although incompletely understood, interaction between the psyche and the immune system provides one potential mechanism linking stress and disease inception and progression. Known cross-talk between the brain and immune system includes the hypothalamic-pituitary-adrenal axis, which centrally drives glucocorticoid production in the adrenal cortex, and the sympathetic-adrenal-medullary axis, which controls stress-induced catecholamine release in support of the fight-or-flight reflex. It remains unknown, however, whether chronic stress changes hematopoietic stem cell activity. Here we show that stress increases proliferation of these most primitive hematopoietic progenitors, giving rise to higher levels of disease-promoting inflammatory leukocytes. We found that chronic stress induced monocytosis and neutrophilia in humans. While investigating the source of leukocytosis in mice, we discovered that stress activates upstream hematopoietic stem cells. Under conditions of chronic variable stress in mice, sympathetic nerve fibers released surplus noradrenaline, which signaled bone marrow niche cells to decrease CXCL12 levels through the β3-adrenergic receptor. Consequently, hematopoietic stem cell proliferation was elevated, leading to an increased output of neutrophils and inflammatory monocytes. When atherosclerosis-prone Apoe(-/-) mice were subjected to chronic stress, accelerated hematopoiesis promoted plaque features associated with vulnerable lesions that cause myocardial infarction and stroke in humans." @default.
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• W2152934881 date "2014-06-22" @default.
• W2152934881 modified "2023-10-05" @default.
• W2152934881 title "Chronic variable stress activates hematopoietic stem cells" @default.
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• W2152934881 doi "https://doi.org/10.1038/nm.3589" @default.
• W2152934881 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4087061" @default.
• W2152934881 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/24952646" @default.
• W2152934881 hasPublicationYear "2014" @default.
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