Extracellular matrix and tissue water

Extracellular matrix and tissue water represents the physiological environment surrounding cells, consisting of a structural scaffold of proteins and polysaccharides known as the extracellular matrix (ECM) and the interstitial fluid or tissue water (NCI, 2023). The ECM provides mechanical support and regulates cell signaling, while tissue water facilitates the transport of nutrients and waste products between the blood and cells (StatPearls, 2023). This composite entity is not a single molecular target but rather a therapeutic compartment; for example, osmotic agents like mannitol are used to shift tissue water in cases of cerebral edema, and collagenase enzymes are used to degrade ECM components in Dupuytren's contracture (PubChem, 2024). Dysregulation of the ECM is a hallmark of fibrosis and cancer metastasis, while imbalances in tissue water lead to edema and lymphedema (NCBI, 2022). Understanding the dynamics of this environment is crucial for drug delivery, as the ECM can act as a physical barrier to therapeutic penetration (Nature Reviews Drug Discovery, 2021). Additionally, tissue water serves as a primary signal source in magnetic resonance imaging, allowing for the non-invasive monitoring of physiological changes (Radiopaedia, 2023).

Other names

Extracellular matrixTissue waterInterstitial fluidExtracellular fluidECMInterstitium

Osmotic mobilization of water from the interstitial space into the vascular compartment; enzymatic degradation of extracellular matrix components to alter tissue permeability or structure.