Bone-cartilage crosstalk: a conversation for understanding osteoarthritis

Area of Science:

• Orthopedics
• Rheumatology
• Biomedical Engineering

Background:

• Osteoarthritis (OA) is characterized by cartilage degradation.
• Emerging evidence highlights the involvement of the entire joint in OA.
• The crosstalk between articular cartilage and subchondral bone is a key feature of OA.

Purpose of the Study:

• To review the evidence for biochemical and biomechanical signaling between cartilage and subchondral bone in OA.
• To explore the role of this signaling in OA disease progression.
• To identify potential therapeutic targets for OA based on cartilage-bone interactions.

Main Methods:

• Literature review of studies investigating cartilage-bone crosstalk in osteoarthritis.
• Analysis of biochemical and biomechanical signaling pathways.
• Examination of structural changes in articular cartilage and subchondral bone.

Main Results:

• Significant progressive destructive changes occur in articular cartilage and underlying subchondral bone in OA.
• Biochemical and biomechanical signaling between these tissues plays a crucial role in OA pathogenesis.
• The interface zone, including calcified cartilage and subchondral bone plate, is critical.

Conclusions:

• The interaction between articular cartilage and subchondral bone is central to osteoarthritis progression.
• Targeting the signaling pathways between these tissues offers potential for novel OA therapies.
• Further research into cartilage-bone crosstalk could lead to interventions to halt or slow OA development.