Science & Technology (Commonwealth Union) – Researchers have discovered how cells determine the correct moment to act on physical forces, a breakthrough that could pave the way for new treatments for conditions like cancer and fibrosis.
The research, conducted by teams at King’s College London and the Institute for Bioengineering of Catalonia (IBEC), shows that cells not only detect mechanical forces but also assess how long those forces persist before taking action.
This work highlights a built-in timing system that enables cells to disregard short-lived mechanical signals while responding to more prolonged ones—an ability that plays a key role in disease development.
In everyday conditions, cells encounter a variety of mechanical cues. Organs such as the lungs, heart, and bladder are subject to rapid, repeated forces from breathing, heartbeats, and bladder function, while slower, longer-lasting changes arise during processes like wound repair or tumour development.
Cells constantly have to make sense of physical forces as well as chemical signals from their environment. Although scientists have long known how cells react to chemical cues, far less has been understood about how they interpret mechanical signals over time.
Researchers now suggest that cells apply a kind of “low-pass filter,” allowing them to ignore brief disturbances while reacting to signals that persist over longer periods.
Professor Pere Roca-Cusachs, senior author of the study and principal investigator of the Cellular and Molecular Mechanobiology group at IBEC, as well as Full Professor at the Faculty of Medicine and Health Sciences of the University of Barcelona, pointed out that we can think of it as driving on a motorway and suddenly hearing a loud noise nearby— we would likely respond straight away because it might signal danger. He further pointed out that however that a faint, odd sound coming from your own engine might be overlooked unless it continues and cells face a similar dilemma: they must determine which signals are important and when to act on them.
The researchers discovered that cells depend on structures known as fibrillar adhesions—specialised contact points that let them anchor to their surroundings and pass mechanical forces into their interior.
These adhesions enable the cell’s nucleus to remain in a distorted state even after the force has gone, allowing the signal to last for roughly an hour. This effect is supported by a network of fibres called vimentin, which helps sustain the response over time. When this system is disrupted, cells can no longer retain these mechanical signals, causing them to react faster but with less precision.
Overall, this acts as a biological filtering system: short-lived forces are ignored, while prolonged forces provoke a response. Many key processes, including the activation of the cancer-associated protein YAP, rely on this timing mechanism.
Dr Amy Beedle, who is a lecturer in Biological Physics at King’s College London as well as the lead author of the study, indicated that the work has a significant impact for not just the way cells and tissues function, but the temporal element, which they are amongst the first to evaluate, is a major factor in the years ahead for treatment.
“Many diseases, including cancer and fibrosis, involve long-term changes in tissue stiffness and mechanical forces. Understanding how cells interpret how these complex mechanical signals are playing a part in disease progression could empower researchers to design better therapies in the future.”
The results also indicate that this process helps shield the cell’s nucleus from harm when it is subjected to physical stress.
The researchers now plan to investigate how this timing system operates within more complex tissues and in disease conditions, where mechanical changes play a significant role in how illnesses develop and progress.
