
The vasculature consists of two types of cells that interact with each other. The endothelial cells create the internal layer of the vessel wall, whereas the perivascular cells, also known as pericytes, vascular smooth muscle cells, or mural cells, encircle the exterior of the vascular tube.a204 cell line
The expression of the markers Pdgfrb, Cspg4, Rgs5, and Notch3 is widespread across all mural cells, exhibiting a significant degree of conservation. Illustrated in Figure 2 is the organotypic heterogeneity of pericyte markers.
Endothelial cells, commonly referred to as ECs, and pericytes/vascular smooth muscle cells, abbreviated as PC, originate from distinct precursor cells. ECs originate from angioblasts or hemangioblasts during embryonic development, whereas pericytes/vSMCs are descended from mesenchymal stem cells or neurocrest cells.
In a normally functioning lung, there exist at least two distinct varieties of macrophages: alveolar macrophages (AMs) and interstitial macrophages (IMs) [14]. These macrophages vary functionally and can be differentiated based on their specific localization within the lung tissue and their expression of CD11b and CD11c markers.
There is a mutual interaction between endothelial cells and pericytes, with pericytes expressing VEGF165 and playing a role in maintaining vessel integrity. On the other hand, retinal endothelial cells secrete PDGFB, which stimulates the recruitment and multiplication of pericytes.
Type-1 pericytes play a pivotal role in ectopic adipocyte deposition (15) and the gradual accumulation of fibrous tissue as a result of aging (18). Conversely, type-2 pericytes exhibit a propensity to differentiate into neural lineages (16, 17) and contribute significantly to the regeneration of skeletal muscle following injury (15).
Types, Characterization, and Functional Roles of Perivascular Cells: An Insight Perivascular cells, commonly abbreviated as PCs, are diverse cells that can be extracted from various bodily tissues. They play pivotal roles in tissue rejuvenation, maintaining vascular equilibrium, and facilitating angiogenesis. These cells primarily consist of two distinct categories: vascular smooth muscle cells, also known as SMCs, and pericytes.
Endothelial cells form the interior coating of blood vessels, whereas pericytes envelope smaller blood vessels, including capillaries, arterioles preceding capillaries, venules preceding capillaries, and venules responsible for collecting blood (1). These pericytes utilize cytoplasmic extensions to encircle the exterior surface of the endothelial tubing (2). Posted on January 24, 2014.huo9
Pericytes play a crucial role in stabilizing and overseeing the maturation process of endothelial cells. This is achieved through direct communication between their cell membranes, along with paracrine signaling mechanisms. A shortage of pericytes within the central nervous system has been linked to heightened permeability of the blood-brain barrier.lung pericytes
Consumption and elimination of extracellular substances through phagocytosis
In scenarios simulating acute brain trauma, pericytes are responsible for the phagocytosis of cellular remnants, facilitating their removal from the injury site 24, 103.