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Stakenborg, Michelle; Abdurahiman, Saeed; De Simone, Veronica; Goverse, Gera; Stakenborg, Nathalie; van Baarle, Lies; Wu, Qin; Pirottin, Dimitri; Kim, Jung-Seok; Chappell-Maor, Louise; Pintelon, Isabel; Thys, Sofie; Pollenus, Emilie; Boon, Louis; Van den Steen, Philippe; Hao, Marlene; Van Ginderachter, Jo A; Boeckxstaens, Guy E; Timmermans, Jean-Pierre; Jung, Steffen; Marichal, Thomas; Ibiza, Sales; Matteoli, Gianluca
Mucosal immunology, 06/2022, Letnik: 15, Številka: 6Journal Article
Monocyte-derived macrophages (Mφs) are crucial regulators during muscularis inflammation. However, it is unclear which micro-environmental factors are responsible for monocyte recruitment and anti-inflammatory Mφ differentiation in this paradigm. Here, we investigate Mφ heterogeneity at different stages of muscularis inflammation and determine how environmental cues can attract and activate tissue-protective Mφs. Results showed that muscularis inflammation induced marked alterations in mononuclear phagocyte populations associated with a rapid infiltration of Ly6c monocytes that locally acquired unique transcriptional states. Trajectory inference analysis revealed two main pro-resolving Mφ subpopulations during the resolution of muscularis inflammation, i.e. Cd206 MhcII and Timp2 MhcII Mφs. Interestingly, we found that damage to the micro-environment upon muscularis inflammation resulted in EGC activation, which in turn stimulated monocyte infiltration and the consequent differentiation in anti-inflammatory CD206 Mφs via CCL2 and CSF1, respectively. In addition, CSF1-CSF1R signaling was shown to be essential for the differentiation of monocytes into CD206 Mφs and EGC proliferation during muscularis inflammation. Our study provides a comprehensive insight into pro-resolving Mφ differentiation and their regulators during muscularis inflammation. We deepened our understanding in the interaction between EGCs and Mφs, thereby highlighting pro-resolving Mφ differentiation as a potential novel therapeutic strategy for the treatment of intestinal inflammation.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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