Imke Liebold, Amirah Al Jawazneh, Christian Casar, Clarissa Lanzloth, Stephanie Leyk, Madeleine Hamley, Milagros N Wong, Dominik Kylies, Stefanie K Gräfe, Ilka Edenhofer, Irene Aranda-Pardos, Marie Kriwet, Helmuth Haas, Jenny Krause, Alexandros Hadjilaou, Andra B Schromm, Ulricke Richardt, Petra Eggert, Dennis Tappe, Sören A Weidemann, Sourav Ghosh, Christian F Krebs, Noelia A-Gonzalez, Anna Worthmann, Ansgar W Lohse, Samuel Huber, Carla V Rothlin, Victor G Puelles, Thomas Jacobs, Nicola Gagliani, Lidia Bosurgi
Macrophages are functionally heterogeneous cells essential for apoptotic cell clearance. Apoptotic cells are defined by homogeneous characteristics, ignoring their original cell lineage identity. We found that in an interleukin-4 (IL-4)-enriched environment, the sensing of apoptotic neutrophils by macrophages triggered their tissue remodeling signature. Engulfment of apoptotic hepatocytes promoted a tolerogenic phenotype, whereas phagocytosis of T cells had little effect on IL-4-induced gene expression. In a mouse model of parasite-induced pathology, the transfer of macrophages conditioned with IL-4 and apoptotic neutrophils promoted parasitic egg clearance...
April 5, 2024: Science