The accumulation of "zombie cells" – senescent cells that have stopped dividing but not died – is linked to a bouquet of age-related ailments, from arthritis to chronic inflammation. Until now, their identification required tissue destruction, which limited diagnostics. Now, researchers from MIT have found a way to look inside without causing harm.
Using a combination of Raman microscopy and single-cell gene expression analysis, scientists have been able to identify unique biochemical "barcodes" of senescent cells. This allows for their rapid and non-invasive detection in tissues. In experiments on mice, the method showed that aging cells accumulate more fats, and in skin cells, pathways related to muscle contraction and collagen also change.
What does this mean for the average person? Potentially, the possibility of early diagnosis of diseases associated with the accumulation of these cells and the development of more precise treatment methods. Researchers are already talking about the possibility of creating endoscopes that can "see" these cells inside the body. Although the technology has been tested on mice so far, its adaptation for humans is the next step.
Yesterday's medicine could only see these cells after their destruction. Today's medicine can "read" them, leaving them alive. This is not just a scientific breakthrough, but a step towards a deeper understanding of the aging process and, possibly, towards extending healthy life.