Newly Formed Endothelial Cells Regulate Myeloid Cell Activity Following Spinal Cord Injury via Expression of CD200 Ligand.
Merav CohenHila Ben-YehudaZiv PoratCatarina RaposoSiamon GordonMichal SchwartzPublished in: The Journal of neuroscience : the official journal of the Society for Neuroscience (2017)
This manuscript focuses on a novel mechanism of inflammation-regulation following spinal cord injury (SCI), orchestrated by CD200-ligand (CD200L) expressed by newly formed endothelial cells within the lesion site. Our study reveals that, in homeostasis, CD200L is expressed by endothelial cells of the mouse blood-cerebrospinal fluid barrier and of the blood-leptomeningeal barrier, but not by endothelial cells of the blood-spinal cord barrier. Following SCI, newly formed endothelial cells located within the epicenter of the lesion site were found to express CD200L at time points that were shown to be critical for repair. Our results reveal a direct interaction between CD200L+ endothelial cells and CD200R+ microglia and macrophages, resulting in attenuated inflammation, biasing macrophage phenotype toward inflammation-resolving cells, and promotion of functional recovery following SCI.
Keyphrases
- endothelial cells
- spinal cord injury
- spinal cord
- oxidative stress
- high glucose
- cerebrospinal fluid
- neuropathic pain
- nk cells
- vascular endothelial growth factor
- stem cells
- cell proliferation
- mesenchymal stem cells
- acute myeloid leukemia
- bone marrow
- cell death
- adipose tissue
- dendritic cells
- gene expression
- cell cycle arrest
- cell therapy
- signaling pathway
- brain metastases