Collagen fiber organization

Collagen fiber organization refers to the biological process (GO:0030199) by which collagen molecules are secreted, processed, and assembled into highly ordered fibrils and fibers within the extracellular matrix (ECM) [Source: QuickGO]. This process is fundamental for providing tensile strength and structural support to connective tissues such as skin, tendons, and ligaments [Source: PMID: 18425114]. Key molecular players in this organization include lysyl oxidase (LOX) enzymes, which catalyze the cross-linking of collagen strands, and various small leucine-rich proteoglycans (SLRPs) that regulate fibril diameter and spacing [Source: PMID: 25236568]. Pathological collagen organization is a defining feature of fibrosis, where excessive cross-linking leads to tissue stiffening and organ failure, and in the tumor microenvironment, where linearized collagen tracks facilitate cancer cell migration and invasion [Source: PMID: 21907110]. While collagen fiber organization is a complex multi-step process rather than a single molecular target, it is a major focus of drug development; current pharmacological approaches aim to modulate the enzymes (like LOXL2) and signaling cytokines (like TGF-beta) that govern the density and alignment of the collagen network [Source: PMID: 30635424].

Other names

Collagen fibrillogenesisCollagen assemblyExtracellular matrix organizationFibrillar collagen organizationGO:0030199

Therapeutic strategies targeting this process involve the inhibition of enzymes responsible for collagen cross-linking (e.g., Lysyl oxidase inhibitors), the blockade of pro-fibrotic signaling pathways such as TGF-beta to reduce collagen synthesis, or the modulation of integrin-mediated cell-matrix interactions [Source: PMID: 30635424, PMID: 26338067].