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- Talk
- 14/09/2021
- UK
An In Vitro System to Study the Effect of Subchondral Bone Health on Articular Cartilage Repair in Humans
Description
This presentation by Timothy Hopkins, a postdoctoral research associate at Keele University, discusses his PhD research on the communication between articular cartilage and subchondral bone in the human knee. He introduces the biomechanical concept of the osteochondral unit, which includes cartilages of different compositions and the subchondral bone. Hopkins explains that recent studies have shown that this communication, previously thought impossible due to the calcified cartilage barrier, does occur in both healthy and diseased conditions.
The focus of the research is on the implications of this communication for chondrocyte-based repair strategies in treating damage to the articular cartilage, particularly through autologous chondrocyte implantation. He hypothesizes that the health of the subchondral bone could influence the outcomes of such therapies. To test this, tissue samples from total knee replacements were analyzed, revealing areas of cartilage that display varying stages of arthritis.
Hopkins describes their methodology, which includes isolating mesenchymal stem cells from subchondral bone and developing an in vitro co-culture model to mimic conditions during chondrocyte implantation. The results show that co-culturing with late-stage osteoarthritic bone marrow stem cells decreases the proliferation and extracellular matrix production of healthy chondrocytes. The research indicates that the presence of unhealthy subchondral bone may hinder the effectiveness of cartilage repair strategies.
Hopkins concludes by emphasizing the need for understanding the regulatory effects of the subchondral bone on chondrocytes, which could open new avenues for enhancing cartilage repair techniques in clinical settings. He invites questions, signaling a readiness to engage in discussion.