Tenocyte-driven tissue regeneration

Tenocytes are the primary resident cells in tendons, responsible for synthesizing and maintaining the extracellular matrix, particularly type I collagen, which provides tendons with their tensile strength to transmit forces from muscle to bone. These elongated, spindle-shaped fibroblasts exhibit low metabolic activity in mature tendons, contributing to poor natural healing after injury due to limited cellularity, vascularization, and turnover rates that can span decades. Tendon stem/progenitor cells (TSPCs), a subpopulation within tendon tissue, drive regeneration by differentiating into tenocytes, modulating inflammation, promoting cell proliferation, and balancing matrix remodeling to facilitate repair. In injury response, TSPCs and tenocytes participate in proliferative and remodeling phases, but misdifferentiation can lead to scarred, biomechanically inferior tissue or tendinopathy. While not a druggable molecular target like a receptor or enzyme, enhancing tenocyte-driven processes through stem cell therapies, growth factors (e.g., TGF-β, BMP12/13), or tissue engineering shows promise for improving tendon regeneration, though challenges persist in directing lineage-specific differentiation and avoiding fibrosis.

Other names

Tenocyte-mediated tendon regenerationTSPC-driven tendon healingTendon progenitor cell-mediated repair