Tissue surface amine groups

Tissue surface amine groups are primary amine moieties predominantly found on the side chains of lysine residues within extracellular matrix proteins like collagen and elastin, as well as on various cell surface proteins (Source: PubMed PMC3117093). These groups act as critical nucleophilic targets for a variety of surgical adhesives and sealants designed to achieve rapid hemostasis or tissue closure. When these amines are exposed to electrophilic agents, such as N-hydroxysuccinimide (NHS) esters or aldehydes found in medical glues, they undergo rapid covalent bonding to form stable cross-links (Source: Baxter Healthcare/CoSeal). This chemical interaction facilitates the mechanical anchoring of synthetic or biological polymers directly to the tissue surface, providing a seal that can withstand physiological pressures. Consequently, these amine groups are essential for the efficacy of modern surgical sealants used in cardiovascular, thoracic, and neurological procedures. Understanding the density and accessibility of these groups is vital for optimizing the bond strength and biocompatibility of tissue-reactive medical devices.

Other names

Primary amine groupsSurface amino groupsProtein-bound aminesTissue-bound primary aminesLysine side-chain amines

Covalent cross-linking via nucleophilic attack of primary amines on electrophilic groups, such as N-hydroxysuccinimide (NHS) esters or aldehydes, to form stable amide or imine linkages (Source: Journal of Biomedical Materials Research Part B: Applied Biomaterials).