Collagen-binding cell adhesion receptors (CBCARs)

Collagen-binding cell adhesion receptors, primarily comprising specific integrins (such as alpha-1 beta-1 and alpha-2 beta-1) and discoidin domain receptors (DDR1 and DDR2), are essential mediators of the cellular response to Autogenous Partially Demineralized Dentin Matrix (APDDM). APDDM is a bioactive bone graft material derived from a patient's own teeth, where the organic matrix is predominantly composed of type I collagen. These receptors recognize specific motifs within the collagen fibers, such as the GFOGER sequence, to facilitate the initial attachment, spreading, and recruitment of mesenchymal stem cells and osteoblasts onto the graft scaffold. This interaction triggers critical intracellular signaling cascades, including the FAK/Src and MAPK/ERK pathways, which drive the expression of osteogenic transcription factors like Runx2. In clinical settings such as socket preservation and alveolar ridge augmentation, these receptors are vital for the successful integration of the APDDM scaffold, promoting robust new bone formation and the osseointegration of dental implants. Therapeutic enhancement of this target often involves loading the APDDM with growth factors like rhBMP-2 or pharmacological agents like metformin to synergistically accelerate the regenerative process.

Other names

Collagen receptorsIntegrin alpha-1 beta-1Integrin alpha-2 beta-1Integrin alpha-10 beta-1Integrin alpha-11 beta-1Discoidin domain receptor 1 (DDR1)Discoidin domain receptor 2 (DDR2)Type I collagen-binding receptors

Binding of cell surface integrins and discoidin domain receptors to the type I collagen fibers in the APDDM scaffold triggers intracellular signaling cascades (e.g., FAK/Src, MAPK/ERK, and Runx2 pathways) that promote the recruitment, adhesion, and osteogenic differentiation of mesenchymal stem cells and osteoblasts.