Dynamic changes to lipid mediators support transitions among macrophage subtypes during muscle regeneration
| Autor: | Brian E. Sansbury, Andreas Patsalos, Tristan T. Hays, Laszlo Nagy, Colin O. Riley, Xianlin Han, Matthew Spite, Nikolas Giannakis |
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| Rok vydání: | 2019 |
| Předmět: |
0301 basic medicine
Innate immune system Chemistry Regeneration (biology) Immunology Skeletal muscle Inflammation Lipid signaling Lipidome Cell biology 03 medical and health sciences 030104 developmental biology 0302 clinical medicine medicine.anatomical_structure Lipidomics medicine Immunology and Allergy Macrophage medicine.symptom 030215 immunology |
| Zdroj: | Nature Immunology. 20:626-636 |
| ISSN: | 1529-2916 1529-2908 |
| Popis: | Muscle damage elicits a sterile immune response that facilitates complete regeneration. Here, we used mass spectrometry-based lipidomics to map the mediator lipidome during the transition from inflammation to resolution and regeneration in skeletal muscle injury. We observed temporal regulation of glycerophospholipids and production of pro-inflammatory lipid mediators (for example, leukotrienes and prostaglandins) and specialized pro-resolving lipid mediators (for example, resolvins and lipoxins) that were modulated by ibuprofen. These time-dependent profiles were recapitulated in sorted neutrophils and Ly6Chi and Ly6Clo muscle-infiltrating macrophages, with a distinct pro-resolving signature observed in Ly6Clo macrophages. RNA sequencing of macrophages stimulated with resolvin D2 showed similarities to transcriptional changes found during the temporal transition from Ly6Chi macrophage to Ly6Clo macrophage. In vivo, resolvin D2 increased Ly6Clo macrophages and functional improvement of the regenerating muscle. These results reveal dynamic lipid mediator signatures of innate immune cells and provide a proof of concept for their exploitable effector roles in muscle regeneration. |
| Databáze: | OpenAIRE |
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