Non-viable wound proteins

Non-viable wound proteins comprise a complex mixture of denatured extracellular matrix components, including collagen, fibrin, and elastin, found in necrotic tissue. These proteins accumulate in chronic wounds, such as pressure ulcers and diabetic foot ulcers, as well as in severe burns [1]. The presence of this devitalized tissue, often referred to as eschar or slough, acts as a physical barrier to the migration of keratinocytes and the formation of healthy granulation tissue [1, 4]. Furthermore, these proteins provide a scaffold for bacterial colonization and the development of biofilms, which can lead to persistent infection and chronic inflammation [3]. In therapeutic contexts, these proteins serve as the primary substrate for enzymatic debridement agents like collagenase or bromelain [2, 3]. These drugs work by selectively cleaving the peptide bonds within the non-viable proteins, facilitating their removal without damaging healthy, viable tissue [2]. Successful debridement of these proteins is a critical step in wound bed preparation, enabling the progression toward definitive closure [1, 4]. Sources: [1] StatPearls: Wound Debridement (https://www.ncbi.nlm.nih.gov/books/NBK507882/); [2] FDA: Santyl (collagenase) Prescribing Information; [3] EMA: NexoBrid (bromelain) Summary of Product Characteristics; [4] Journal of Wound Care: The role of collagenase in wound debridement.

Other names

Eschar proteinsSloughNecrotic tissue proteinsDevitalized wound tissueDenatured collagenWound debris

Enzymatic proteolysis and hydrolysis of denatured extracellular matrix components to facilitate debridement.