Tendon Cells’ Response to Tissue Stiffness Offers Clues for Treating Injury
Scientists at Queen Mary University of London studied two tendon cell groups that sit in different mechanical environments. Cells from the softer interfascicular matrix changed their structure and gene activity when grown on surfaces of varying stiffness, while fascicular matrix cells did not. The findings may improve research into tendinopathy and why tendon pain persists.
Tendons are connective tissues joining muscle to bone and carrying movement forces. Inside, collagen fascicles are separated by softer interfascicular matrix. Cells in these two zones experience different mechanical conditions, which may shift with age, injury, or disease.
In lab tests, IFM cells grown on varied stiffness changed shape, gene activity, and multiplication; FM cells did not. Returning IFM cells to softer surfaces reversed several effects. This provides a controlled culture method for studying tendinopathy, though it does not prove cause or treatment.
This research may inform future studies of tendinopathy, a condition affecting people and animals with persistent pain and movement limits. By clarifying how tendon cell populations react to stiffness, it could help scientists design better experiments and eventually identify targets, though clinical benefits remain uncertain. Patients, veterinarians, and researchers may be affected.