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Cells have a built-in recycling system called autophagy — and now scientists have a precise new way to study it. Researchers at the Salk Institute developed ASAP, a light-based tool that can rapidly switch autophagy on and off in living cells. The tool has already uncovered surprising new targets of autophagy, including nuclear pore complexes, and could reshape research into cancer, neurodegeneration, and aging.
Cells are constantly cleaning house — breaking down worn-out proteins and structures through a process called autophagy (literally "self-eating"). But studying exactly what autophagy targets, and how fast, has been notoriously difficult. Now, researchers at the Salk Institute have developed a game-changing tool called ASAP (Autophagic SNARE for Abrupt Photomanipulation) that uses light to turn autophagy on and off with remarkable speed and precision. The study was published in Nature Cell Biology on November 12, 2026.
ASAP is an optogenetic tool — it engineers cells to respond to light — and it allowed researchers to block autophagy and observe what immediately accumulated inside cells, revealing autophagy's most tightly regulated targets. The findings confirmed known targets but also uncovered two big surprises: nuclear pore complexes (the gatekeepers controlling what enters and exits a cell's nucleus) and protein condensates (hubs for protein production), linking — for the first time — the processes of protein building and protein breakdown.
Key Takeaways:
Why it matters: Dysfunctional autophagy is implicated in cancer, neurodegeneration, aging, and infection. ASAP gives scientists an unprecedented ability to dissect autophagy's role in disease — potentially opening new therapeutic targets across multiple conditions.