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• W3159442603 abstract "Enterohaemorrhagic <i>E. coli</i> cause major epidemics worldwide with significant organ damage and very high percentages of death. Due to the ability of enterohaemorrhagic <i>E. coli</i> to produce shiga toxin these bacteria damage the kidney leading to the hemolytic uremic syndrome. A therapy against this serious kidney disease has not been developed yet and the impact and mechanism of leukocyte activation and recruitment are unclear. Tissue-resident macrophages represent the main leukocyte population in the healthy kidney, but the role of this important cell population in shiga toxin-producing <i>E. coli</i>-hemolytic uremic syndrome is incompletely understood. Using state of the art microscopy and mass spectrometry imaging, our preclinical study demonstrated a phenotypic and functional switch of tissue-resident macrophages after disease induction in mice. Kidney macrophages produced the inflammatory molecule TNFα and depletion of tissue-resident macrophages via the CSF1 receptor abolished TNFα levels in the kidney and significantly diminished disease severity. Furthermore, macrophage depletion did not only attenuate endothelial damage and thrombocytopenia, but also activation of thrombocytes and neutrophils. Moreover, we observed that neutrophils infiltrated the kidney cortex and depletion of macrophages significantly reduced the recruitment of neutrophils and expression of the neutrophil-attracting chemokines CXCL1 and CXCL2. Intravital microscopy revealed that inhibition of CXCR2, the receptor for CXCL1 and CXCL2, significantly reduced the infiltration of neutrophils and reduced kidney injury. Thus, our study shows activation of tissue-resident macrophages during shiga toxin-producing <i>E. coli</i>-hemolytic uremic syndrome leading to the production of disease-promoting TNFα and CXCR2-dependent recruitment of neutrophils." @default.
• W3159442603 created "2021-05-10" @default.
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• W3159442603 date "2021-08-01" @default.
• W3159442603 modified "2023-10-16" @default.
• W3159442603 title "Tissue-resident macrophages mediate neutrophil recruitment and kidney injury in shiga toxin-induced hemolytic uremic syndrome" @default.
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• W3159442603 doi "https://doi.org/10.1016/j.kint.2021.03.039" @default.
• W3159442603 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33930412" @default.
• W3159442603 hasPublicationYear "2021" @default.
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