Interleukin-1 Is Overexpressed in Injured Muscles Following Spinal Cord Injury and Promotes Neurogenic Heterotopic Ossification
Abstract
Neurogenic heterotopic ossifications (NHOs) form in periarticular muscles after severe spinal cord (SCI) and traumatic brain injuries. The pathogenesis of NHO is poorly understood with no effective preventive treatment. The only curative treatment remains surgical resection of pathological NHOs. In a mouse model of SCI-induced NHO that involves a transection of the spinal cord combined with a muscle injury, a differential gene expression analysis revealed that genes involved in inflammation such as interleukin-1β (IL-1β) were overexpressed in muscles developing NHO. Using mice knocked-out for the gene encoding IL-1 receptor (IL1R1) and neutralizing antibodies for IL-1α and IL-1β, we show that IL-1 signaling contributes to NHO development after SCI in mice. Interestingly, other proteins involved in inflammation that were also overexpressed in muscles developing NHO, such as colony-stimulating factor-1, tumor necrosis factor, or C-C chemokine ligand-2, did not promote NHO development. Finally, using NHO biopsies from SCI and TBI patients, we show that IL-1β is expressed by CD68+ macrophages. IL-1α and IL-1β produced by activated human monocytes promote calcium mineralization and RUNX2 expression in fibro-adipogenic progenitors isolated from muscles surrounding NHOs. Altogether, these data suggest that interleukin-1 promotes NHO development in both humans and mice. © 2021 American Society for Bone and Mineral Research (ASBMR).
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Dec 01, 2020
- Source ID
- 10.1002/jbmr.4482
Entities
People
- Allison R Pettit
- Beulah Jose
- Cedryck Vaquette
- Dorothée Girard
- François Genêt
- Gethin Thomas
- Hsu-wen Tseng
- Irina Kulina
- Jean-Pierre Lévesque
- Jules Gueguen
- Kate Schroder
- Kylie Anne Alexander
- Lawrie Wheeler
- Marjorie Salga
- Susan M. Millard
- Sébastien Banzet
- Whitney Fleming
Organizations
- Armed Forces Biomedical Research Institute
- Mater Foundation
- National Health and Medical Research Council
- Queensland University of Technology
- United States Department of Defense
- University of Queensland
- Université de Versailles Saint-Quentin-en-Yvelines