| First Author | Krljanac B | Year | 2019 |
| Journal | Sci Immunol | Volume | 4 |
| Issue | 35 | PubMed ID | 31126996 |
| Mgi Jnum | J:288825 | Mgi Id | MGI:6435031 |
| Doi | 10.1126/sciimmunol.aau3814 | Citation | Krljanac B, et al. (2019) RELMalpha-expressing macrophages protect against fatal lung damage and reduce parasite burden during helminth infection. Sci Immunol 4(35) |
| abstractText | Alternatively activated macrophages (AAMs) can contribute to wound healing, regulation of glucose and fat metabolism, resolution of inflammation, and protective immunity against helminths. Their differentiation, tissue distribution, and effector functions are incompletely understood. Murine AAMs express high levels of resistin-like molecule (RELM) alpha, an effector protein with potent immunomodulatory functions. To visualize RELMalpha(+) macrophages (MPhis) in vivo and evaluate their role in defense against helminths, we generated RELMalpha reporter/deleter mice. Infection with the helminth Nippostrongylus brasiliensis induced expansion of RELMalpha(+) lung interstitial but not alveolar MPhis in a STAT6-dependent manner. RELMalpha(+) MPhis were required for prevention of fatal lung damage during primary infection. Furthermore, protective immunity was lost upon specific deletion of RELMalpha(+) MPhis during secondary infection. Thus, RELMalpha reporter/deleter mice reveal compartmentalization of AAMs in different tissues and demonstrate their critical role in resolution of severe lung inflammation and protection against migrating helminths. |
