Joint vasculature and subchondral bone

The joint vasculature and subchondral bone represent a critical anatomical and functional unit involved in the maintenance of joint health and the progression of degenerative diseases like osteoarthritis (OA). The subchondral bone provides essential mechanical support to the overlying articular cartilage, while its associated vasculature facilitates the exchange of nutrients and signaling molecules between the systemic circulation and the joint environment (Hu et al., 2021, Nature Reviews Rheumatology). In pathological states, increased vascular invasion and nerve growth from the subchondral bone into the calcified cartilage contribute significantly to structural instability and chronic pain (Mapp & Walsh, 2012, Nature Reviews Rheumatology). While not a single molecular target, this tissue complex is the site of action for various therapies, such as bisphosphonates that inhibit bone resorption and anti-NGF agents that target pain-related neurovascular ingrowth (Castaneda et al., 2012, Therapeutic Advances in Musculoskeletal Disease). Understanding the interplay between vascular expansion and bone remodeling in this region is essential for developing effective disease-modifying osteoarthritis drugs (DMOADs).

Other names

Osteochondral unitSubchondral bone-cartilage interfaceJoint vascular-bone nicheSubchondral bone plate

Modulation of bone turnover through osteoclast inhibition, suppression of pathological angiogenesis via VEGF neutralization, and inhibition of neurovascular ingrowth through NGF blockade.