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Nat Immunol. 2019 May;20(5):626-636. doi: 10.1038/s41590-019-0356-7. Epub 2019 Apr 1.

Dynamic changes to lipid mediators support transitions among macrophage subtypes during muscle regeneration.

Author information

1
Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary.
2
UD-Genomed, Debrecen, Hungary.
3
Center for Experimental Therapeutics and Reperfusion Injury, Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA.
4
Departments of Medicine and Biological Chemistry, Johns Hopkins University School of Medicine and Johns Hopkins All Children's Hospital, St. Petersburg, FL, USA.
5
Barshop Institute for Longevity and Aging Research, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA.
6
Genomic Control of Metabolism Program, Sanford Burnham Prebys Medical Discovery Institute, Orlando, FL, USA.
7
Center for Experimental Therapeutics and Reperfusion Injury, Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA. mspite@bwh.harvard.edu.
8
Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary. lnagy@jhmi.edu.
9
UD-Genomed, Debrecen, Hungary. lnagy@jhmi.edu.
10
Departments of Medicine and Biological Chemistry, Johns Hopkins University School of Medicine and Johns Hopkins All Children's Hospital, St. Petersburg, FL, USA. lnagy@jhmi.edu.

Abstract

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.

PMID:
30936495
PMCID:
PMC6537107
DOI:
10.1038/s41590-019-0356-7
[Indexed for MEDLINE]
Free PMC Article

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