Denatured type I collagen

Denatured type I collagen refers to the unwound or proteolytically degraded state of the most abundant structural protein in the human extracellular matrix (ECM). While native type I collagen forms a stable triple helix that provides mechanical strength to tissues like skin, bone, and tendons, denaturation occurs during pathological remodeling driven by matrix metalloproteinases (MMPs) or mechanical stress (Hwang et al., 2017, ACS Nano). This structural transition exposes cryptic epitopes—binding sites that are hidden in the native protein—which play critical roles in cell signaling, particularly through interactions with integrins like alpha-v-beta-3 (Xu et al., 2001, J. Cell Biol.). In diseases such as cancer and fibrosis, denatured collagen is a hallmark of the remodeled microenvironment, promoting angiogenesis and tumor invasion (Brooks et al., 1998, Cell). Consequently, it serves as a highly selective target for diagnostic imaging and site-specific drug delivery, using agents like collagen-hybridizing peptides (CHPs) or monoclonal antibodies that distinguish between healthy native tissue and diseased, remodeling tissue (Li & Yu, 2013, Soft Matter). These targeting strategies aim to deliver therapeutic payloads or block the pro-migratory signals provided by the degraded matrix (Bennink et al., 2018, Sci Rep).

Other names

GelatinUnwound type I collagenDegraded type I collagenCryptic collagen epitopes

Selective binding to exposed cryptic epitopes in denatured collagen to inhibit angiogenesis, block cell-matrix interactions, or deliver therapeutic payloads to remodeling tissues.