Cell membrane surface and extracellular matrix at the material–tissue interface

The cell membrane surface and extracellular matrix (ECM) at the material–tissue interface represent the complex biological boundary where medical implants interact with host tissues. Upon implantation, the surface is immediately coated by a layer of adsorbed proteins (e.g., albumin, fibrinogen, fibronectin), which mediates subsequent cellular interactions through transmembrane receptors such as integrins [1]. This interface is the primary site for mechanotransduction, where physical properties of the material, such as stiffness and topography, influence cell signaling pathways and fate [2]. The biological success of an implant depends on achieving favorable integration while minimizing the foreign body response (FBR), a process characterized by macrophage fusion into foreign body giant cells and eventual fibrous encapsulation [3]. Therapeutic interventions at this interface include the use of drug-eluting coatings (e.g., sirolimus for stents) or bioactive surface modifications (e.g., RGD peptides) to promote healing and reduce inflammation [4]. Understanding this interface is critical for the development of advanced prosthetics, tissue engineering scaffolds, and biosensors [5].

Other names

BiointerfaceBiomaterial–tissue interfaceImplant–tissue interfaceMaterial–biological interface

Surface functionalization and localized pharmacological modulation of the immune and regenerative response at the site of material implantation to promote integration or inhibit adverse reactions.