Native interstitial collagen types I and III (COL1/COL3)

Native interstitial collagen types I and III are the predominant fibrillar proteins of the extracellular matrix (ECM), providing the essential structural framework for most vertebrate tissues. Type I collagen is characterized by its high tensile strength and is the major component of bone, skin, and tendons, whereas Type III collagen is often found alongside Type I in hollow organs and blood vessels, contributing to tissue elasticity and integrity (Source: StatPearls, Collagen Synthesis). These proteins are synthesized as pro-collagen precursors that undergo extensive post-translational modifications and extracellular cleavage to form mature, cross-linked fibrils (Source: UniProt, P02452). In various diseases, particularly chronic fibrosis of the liver, lungs, and kidneys, an imbalance between collagen synthesis and degradation leads to the pathological accumulation of these interstitial collagens, resulting in organ stiffness and failure (Source: PubMed, PMC4014657). Pharmacological intervention targets these collagens either through direct enzymatic digestion, such as the use of collagenase clostridium histolyticum for fibroproliferative disorders, or by inhibiting the signaling pathways (e.g., TGF-beta) that drive their overproduction (Source: FDA, Xiaflex Prescribing Information). Additionally, circulating fragments of these collagens serve as critical biomarkers for monitoring disease progression and therapeutic response in fibrotic conditions (Source: PubMed, PMC5385116).

Other names

Fibrillar collagenInterstitial collagenType I collagenType III collagenCOL1A1COL3A1COL1A2

Direct enzymatic hydrolysis of collagen triple helices or indirect suppression of collagen gene expression and post-translational processing.