Neutrophil Migration into the Infected Uroepithelium Is Regulated by the Crosstalk between Resident and Helper Macrophages
Kristina Zec,
Julia Volke,
Nirojah Vijitha,
Stephanie Thiebes,
Matthias Gunzer,
Christian Kurts,
Daniel Robert Engel
Affiliations
Kristina Zec
Institute of Experimental Immunology and Imaging, Department Immunodynamics, University Hospital Essen, University Duisburg-Essen, Essen 45141, Germany
Julia Volke
Institute of Experimental Immunology and Imaging, Department Immunodynamics, University Hospital Essen, University Duisburg-Essen, Essen 45141, Germany
Nirojah Vijitha
Institute of Experimental Immunology and Imaging, Department Immunodynamics, University Hospital Essen, University Duisburg-Essen, Essen 45141, Germany
Stephanie Thiebes
Institute of Experimental Immunology and Imaging, Department Immunodynamics, University Hospital Essen, University Duisburg-Essen, Essen 45141, Germany
Matthias Gunzer
Institute of Experimental Immunology and Imaging, Department Immunodynamics, University Hospital Essen, University Duisburg-Essen, Essen 45141, Germany
Christian Kurts
Institute of Experimental Immunology, University Hospital Bonn, Bonn 53127, Germany
Daniel Robert Engel
Institute of Experimental Immunology and Imaging, Department Immunodynamics, University Hospital Essen, University Duisburg-Essen, Essen 45141, Germany
The antibacterial defense against infections depends on the cooperation between distinct phagocytes of the innate immune system, namely macrophages and neutrophils. However, the mechanisms driving this cooperation are incompletely understood. In this study we describe the crosstalk between Ly6C+ and Ly6C− macrophage-subtypes and neutrophils in the context of urinary tract infection (UTI) with uropathogenic E. coli (UPEC). Ly6C− macrophages acted as tissue resident sentinels and attracted circulating phagocytes by chemokines. Ly6C+ macrophages produced tumor necrosis factor (TNF) that licensed Ly6C− macrophages to release preformed CXCL2, which in turn caused matrix metalloproteinases (MMP-9) secretion by neutrophils to enable transepithelial migration.
