Spatial transcriptomics reveals microenvironmental heterogeneity in osteoarthritic subchondral bone.

Spatial transcriptomics uncovers a conserved osteogenic core-halo architecture with disrupted cell interactions in sclerotic subchondral bone of osteoarthritis patients.

• Why it matters: Understanding the spatial organization of bone remodeling is crucial because subchondral bone changes significantly contribute to osteoarthritis progression, yet its microenvironmental heterogeneity remains poorly characterized.
• What they did: The study applied spatial transcriptomics to human subchondral bone, identifying key signaling axes, cell communication disruptions, and distinct spatial ecotypes across pathological states, including metabolic stress markers.
• The result: These insights reveal mechanisms of aberrant bone remodeling, providing a framework for targeted therapies and advancing knowledge of osteoarthritis-associated subchondral bone alterations.