Parenchymal pericytes are not the major contributor of extracellular matrix in the fibrotic scar after stroke in male mice

Michaela Roth, Andreas Enström, Candice Aghabeick, Robert Carlsson, Guillem Genové, Gesine Paul

Research output: Contribution to journalArticlepeer-review


Scar formation after injury of the brain or spinal cord is a common event. While glial scar formation by astrocytes has been extensively studied, much less is known about the fibrotic scar, in particular after stroke. Platelet-derived growth factor receptor ß-expressing (PDGFRß+) pericytes have been suggested as a source of the fibrotic scar depositing fibrous extracellular matrix (ECM) proteins after detaching from the vessel wall. However, to what extent these parenchymal PDGFRß+ cells contribute to the fibrotic scar and whether targeting these cells affects fibrotic scar formation in stroke is still unclear. Here, we utilize male transgenic mice that after a permanent middle cerebral artery occlusion stroke model have a shift from a parenchymal to a perivascular location of PDGFRß+ cells due to the loss of regulator of G-protein signaling 5 in pericytes. We find that only a small fraction of parenchymal PDGFRß+ cells co-label with type I collagen and fibronectin. Consequently, a reduction in parenchymal PDGFRß+ cells by ca. 50% did not affect the overall type I collagen or fibronectin deposition after stroke. The redistribution of PDGFRß+ cells to a perivascular location, however, resulted in a reduced thickening of the vascular basement membrane and changed the temporal dynamics of glial scar maturation after stroke. We demonstrate that parenchymal PDGFRß+ cells are not the main contributor to the fibrotic ECM, and therefore targeting these cells might not impact on fibrotic scar formation after stroke.

Original languageEnglish
Pages (from-to)826-842
Number of pages17
JournalJournal of Neuroscience Research
Issue number5
Early online date2019 Nov 22
Publication statusPublished - 2020 May

Subject classification (UKÄ)

  • Neurosciences

Free keywords

  • collagen
  • extracellular matrix
  • fibronectin
  • fibrotic scar
  • glial scar
  • pericytes
  • RRID:AB_2082660
  • RRID:AB_2105706
  • RRID:AB_2162497
  • RRID:AB_217595
  • RRID:AB_2298772
  • RRID:AB_298179
  • RRID:AB_305808
  • RRID:AB_354858
  • RRID:AB_393571
  • RRID:AB_467492
  • RRID:SCR_002798
  • RRID:SCR_003070
  • RRID:SCR_010279
  • stroke


Dive into the research topics of 'Parenchymal pericytes are not the major contributor of extracellular matrix in the fibrotic scar after stroke in male mice'. Together they form a unique fingerprint.

Cite this