A gene controls spinal disc aging through cell senescence

Lower back pain is one of the most common complaints in older adults. A key cause is degeneration of the intervertebral discs, the shock-absorbing cushions between the vertebrae. The study, published in Aging Cell, describes how the gene ZNF865 regulates cellular aging in those discs.

Cellular senescence is a state in which cells stop dividing but remain active. They release signalling molecules that can push surrounding cells into senescence as well. This phenomenon, known as the senescence-associated secretory phenotype (SASP), progressively damages the tissue in which those cells reside.

ZNF865 as a brake on cellular senescence

In this study, ZNF865 was found to have an inhibitory effect on cellular senescence in intervertebral disc cells. When the activity of this gene decreases, those cells age more quickly and produce more SASP signals. That accelerates disc breakdown. The researchers therefore describe ZNF865 as an anti-senescence gene.

The study was conducted in cell models, providing mechanistic insight. Whether and how the gene plays exactly the same role in living human intervertebral discs requires further research. The findings are preliminary and need to be confirmed in animal studies and ultimately in clinical research.

Back pain as an aging disease

The finding places lower back pain more firmly within the framework of biological aging. If cellular senescence in the intervertebral disc is driven by specific genes, there are in principle targets for treatments that could slow that process. For longevity science, that is a meaningful shift: from symptom management toward addressing the underlying aging mechanism.

Identifying ZNF865 is an early step in that journey. The road from a gene finding to a working therapy is long, but the direction is clear.

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