Cellular Viscous Properties In Senescence: An Emerging Biophysical Perspective And Potential Biomarker
Our bodies are made of countless cells, and as we age, some of these cells enter a state called senescence, where they stop dividing and undergo various changes. This process is linked to aging and several diseases. Scientists have been exploring new ways to identify these senescent cells, and recent research sheds light on a promising physical characteristic: their internal “thickness” or stiffness, known as viscosity.
This study found that cells experiencing premature aging become significantly more viscous than their healthy counterparts. Imagine trying to move through honey versus water; senescent cells are more like the honey. This increased stiffness isn’t just due to changes in the cell’s nucleus, which houses its genetic material. Instead, a major contributor is the cell’s internal scaffolding, called the cytoskeleton, with a surprising role played by tiny rod-like structures within it known as microtubules.
Understanding these physical changes in cells could pave the way for new diagnostic tools. By simply measuring how “thick” or stiff a cell is, we might be able to quickly identify prematurely aged cells. This could be particularly useful for characterizing cells affected by certain genetic conditions and for monitoring how well new drug therapies are working.
Source: link to paper