Collagen in the extracellular matrix (None commonly used for the general ECM collagens; specific types (e.g., COL1A1 for type I collagen) have abbreviations, but not for the overall "Collagen in the extracellular matrix.")

Collagen is the most abundant structural protein in the extracellular matrix (ECM) of animals, comprising up to 30% of the total protein mass in mammals. It provides essential tensile strength and structural integrity to tissues, regulates cell adhesion and migration, and plays a major role in tissue development and maintenance. Collagen in the ECM is organized into various types (e.g., type I, II, III, IV) with distinct roles—fibrillar types form the bulk of connective tissues, while basement membrane types support specialized barriers. Beyond its mechanical functions, collagen interacts with cell-surface receptors to influence cell behavior and participates in cell signaling. Dysregulation of collagen—either excessive deposition or breakdown—is implicated in numerous diseases, including fibrosis, connective tissue disorders, and cancer invasion and metastasis. Collagen itself is not a therapeutic "target" in the sense of a drug receptor or enzyme, but it is a major substrate or context for therapies aiming to modify tissue structure or function[1][6][10].

Other names

CollagenCollagen fiberECM collagenCollagen protein

Enzymatic degradation (collagenases break down collagen fibers); Inhibition of cross-linking (lysyl oxidase inhibitors prevent collagen fiber stabilization); Modulation of collagen synthesis or deposition (anti-fibrotic therapies); Interaction/disruption of matrix-cell interactions (some anti-cancer approaches)