The chemical fingerprint of ageing cells revealed
Senescent cells are usually identified by changes in which genes are active. But there is much more going on: the chemical composition of these cells also shifts dramatically. A new technique makes that biochemical transformation visible for the first time.
When cells stop dividing and enter a state of senescence, they release substances into their surroundings that promote inflammation. This process is linked to ageing and to a range of age-related diseases. Until now, research has focused mainly on gene activity. The biochemical changes within the cell itself have remained largely hidden.
Two techniques combined
Researchers introduce an approach called RamanOmics. It combines two methods: Raman imaging (a technique that measures the chemical composition of a cell using light scattering) and spatial transcriptomics (a method that maps which genes are active at specific locations within tissue). By linking the two, it becomes possible for the first time to see how a cell’s biochemical state relates to its gene expression profile.
The study, published in Nature Aging, shows that senescence is not just a genetic story. Cells also undergo a profound biochemical reorganisation that was previously invisible with standard methods. RamanOmics opens a new window onto the biology of aged cells.
Why this matters
With a more precise chemical fingerprint of senescence, it becomes easier to search systematically for compounds that can detect or inhibit it. That is relevant for developing treatments aimed at slowing ageing processes. For now, RamanOmics is a laboratory technique. Whether it can be applied in clinical research or in humans remains to be seen. But combining chemical and genetic information at the single-cell level is a step that researchers in the field have long been waiting for.
Search terms to explore further: cellular senescence biochemical remodelling, Raman spectroscopy cell biology, spatial transcriptomics tissue analysis