"Macrophages, a specialized white blood cell and the big “eaters” of our immune system, are the main players in clearing myelin debris. Another player is microglial cells, the central nervous system’s immune cells. However, macrophages and microglia cells are usually absent from the injury site, suggesting the existence of another player.
This new player, researchers found, are endothelial cells, those that line the interior of small blood vessels and act as “amateur eaters” to engulf myelin debris."

"Endothelial cell’s clearance of myelin triggers an abnormal formation of new blood vessels (a process called angiogenesis) at the injury site, as well as chronic inflammation; once activated, endothelial cells recruit large amounts of macrophages to the injured site, promoting inflammation. Finally, the uptake of myelin particles and its elimination process performed by endothelial cells contributes to the development of “scar tissue” also known as fibrosis."

https://multiplesclerosisnewstoday.com/2019/01/24/study-myelin-debris-ms-brain-inflammation/?utm_source=Multiple+Sclerosis&utm_campaign=0861486c99-RSS_US_EMAIL_CAMPAIGN&utm_medium=email&utm_term=0_b5fb7a3dae-0861486c99-71788225

Read about how endothelial cells promote clearance of myelin debris, but also damage mechanisms that promote inflammation.