A New Aging Clock Reads the Cell's Recycling Bins, and Eating Less Slowed It in Animals

An aging clock built from purified lysosomes predicts age across tissues and species in animals; calorie restriction slowed it everywhere but the brain. Single write-up, not checked in people, paper date unconfirmed.

TL;DR

Every cell has recycling bins, small compartments called lysosomes where worn-out parts are broken down and reused. Researchers have now found that the chemistry inside those bins changes with age in a pattern steady enough to work as a clock: read together, the changes predict how old an animal is, across different tissues and different species. That matters because the hunt for treatments that slow aging is stuck on one problem, a fast and trusted way to measure aging, and this is a new kind of gauge that reads the cell's housekeeping instead of its DNA. It also came with a twist worth knowing: calorie restriction, one of the oldest ways to slow aging in lab animals, slowed this clock in the body's other tissues but not in the brain. The work is in animals only so far, and it tracks these changes rather than showing they cause aging. Our odds that the FDA accepts a biological-age test as a measure in aging trials: 65%, likely by 2031. For a breakdown of those odds and a timeline of the breakthroughs that could make aging measurable in people, subscribe.

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