Physiologic receptors for endogenous growth factors and cellular signals and extracellular matrix at bone marrow lesion site

The term refers to the complex milieu of signaling molecules and structural proteins found within bone marrow lesions (BMLs), which are areas of subchondral bone marrow signal changes typically identified on MRI. These lesions are characterized by increased bone turnover, fibrosis, and high levels of pro-inflammatory cytokines and growth factors such as TGF-beta, BMPs, and VEGF. Rather than a single molecular target, this description encompasses a variety of receptors (e.g., TGF-beta receptors, BMP receptors, integrins) and extracellular matrix components that interact to drive the pathogenesis of osteoarthritis and bone pain. Therapeutic strategies targeting this site often aim to stabilize the subchondral bone, promote regenerative healing, or inhibit the catabolic signaling pathways that lead to joint degeneration. Understanding the interplay between these endogenous signals is critical for developing localized treatments like subchondroplasty or targeted biological injections.

Other names

Bone marrow lesion microenvironmentBML signaling complexSubchondral bone signaling receptors

Modulation of the subchondral bone microenvironment to promote tissue repair and reduce inflammatory signaling.