Vascular and stromal cells involved in angiogenesis and tissue repair

Vascular and stromal cells involved in angiogenesis and tissue repair refers to a heterogeneous population of cells, including endothelial cells, pericytes, and fibroblasts, that collectively manage the formation of new blood vessels and the reconstruction of the extracellular matrix (StatPearls, 2023). This cellular collective acts as a functional unit, or niche, that is critical for physiological wound healing but is often hijacked in pathological conditions such as tumor vascularization and chronic fibrosis (NIH, 2022). Therapeutic interventions targeting this niche typically focus on signaling pathways like VEGF, PDGF, and TGF-beta to either inhibit pathological vessel growth in cancer or promote tissue regeneration in ischemic diseases (PubMed, 2021). For instance, anti-angiogenic drugs like bevacizumab target the growth factors that stimulate these cells, while cell-based therapies may use the stromal vascular fraction to accelerate repair (PubChem). Because this term describes a broad cellular environment rather than a specific protein or gene, it is classified as a systemic or cellular target in pharmacological contexts rather than a discrete molecular target. Monitoring the activity of these cells often involves biomarkers like CD31 for endothelial density or alpha-smooth muscle actin for myofibroblast activation. Safety concerns when modulating this system include impaired wound healing and potential cardiovascular complications due to the systemic nature of angiogenic signaling.

Other names

Vascular-stromal nicheAngiogenic microenvironmentStroma-vascular fractionPerivascular nicheAngiogenic cellular collective

Modulation of the cellular microenvironment via inhibition of pro-angiogenic and pro-fibrotic growth factor signaling (e.g., VEGF, PDGF, TGF-beta) or through the administration of regenerative cell therapies to restore vascular integrity.