Injured tissue microenvironment

The injured tissue microenvironment (ITM) is a dynamic and multifaceted milieu that arises following physical, chemical, or biological insult to a tissue [PMC7350145]. It is characterized by a complex interplay between recruited immune cells, such as neutrophils and macrophages, and resident cells like fibroblasts and endothelial cells, all of which operate within a remodeled extracellular matrix (ECM) [Nature Reviews Molecular Cell Biology]. Key biochemical features of this environment include localized hypoxia, acidosis, and the accumulation of damage-associated molecular patterns (DAMPs) and reactive oxygen species (ROS) [Science Signaling]. While the ITM is essential for initiating the wound healing cascade and clearing cellular debris, its persistence or dysregulation can lead to chronic inflammation or pathological fibrosis [PubMed: 28633331]. Therapeutic interventions targeting the ITM often aim to modulate specific signaling pathways, such as the TGF-beta or TNF-alpha axes, to shift the environment from a pro-inflammatory state to a pro-regenerative one [PMC6350660].

Other names

Wound microenvironmentDamaged tissue nicheInflammatory microenvironmentTissue repair niche

Modulation of the inflammatory milieu, inhibition of pro-fibrotic signaling, and regulation of angiogenesis and extracellular matrix turnover.