Fingerprint patterns predict the effectiveness of MSCs for cartilage regeneration
A novel method analyses fingerprint-like patterns to assess the ability of mesenchymal stem cells (MSCs) to repair cartilage.
The development of MSC-based therapeutics remains a focal point in regenerative medicine. A notable example of this is the use of MSCs to promote chondrogenesis in vivo for cartilage regeneration. In translating MSC-based therapeutics, maintaining a seamless cell manufacturing process is imperative for ensuring the potency of the final cell product.
Currently, researchers use an in vitro assay to evaluate the cartilage regeneration potency of MSCs. This process involves culturing MSCs in a 3D microenvironment for 21 days, which is then followed by the quantification of cartilage matrix protein to identify proteins associated with cartilage growth.
To expedite this process, researchers from Singapore-MIT Alliance for Research and Technology (SMART; Singapore) have developed a novel in vitro method that reduces the time taken to evaluate the cartilage regeneration potency of MSCs to just nine days.
In the study, the researchers developed a 2D monolayer culture system of MSCs to predict their chondrogenic potential. Utilizing time-lapse imaging, the team monitored the MSCs as they self-assembled. On days three, six and nine, the researchers captured images, which were subsequently analyzed for identifiable topological defects in the cell monolayer. They found that by day 9 the patterns exhibited by the cells corresponded to mesenchymal condensations aggregates, which are markers of early cartilage development. These patterns serve as an indicator of the MSCs potential for cartilage formation.
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Discussing the significance of the study from a translational perspective, co-author Eng Hin Lee commented: “By offering a more efficient means of evaluating MSCs in production, we can accelerate the development of therapies for joint injuries and common ailments, particularly those affecting the aging population, such as osteoarthritis and address limitations of current surgical and pharmaceutical approaches in restoring cartilage function.”
Comparing traditional methods to the novel method developed by the team, their approach offers promise for greater accuracy and reliability through a more efficient and non-destructive process. In addition, this imaging-based approach allows for the assessment of a larger number of MSCs, enabling the identification of the most effective cells for cartilage regeneration.
“This innovative method holds a major advantage as it allows manufacturers to conduct more frequent testing of their cell-based medicine, ensuring safety, purity, and effectiveness throughout production. This can potentially speed up the traditionally long process of securing regulatory approval for cell-based medicines,” added Zhiyong Poon, corresponding author of the paper.
Following the successful demonstration of their novel method, the researchers will aim to determine whether the topological patterns observed in this study could be utilized to predict in vivo cartilage repair outcomes.