New Protein Tape Recorder Tracks Gene Activity Inside Living Cells for Weeks

A Molecular Memory System

Researchers at the University of Michigan have developed a remarkable new tool that essentially gives cells their own internal tape recorder. Called CytoTape, this genetically encoded protein system can continuously chronicle multiple gene activities within individual living cells for up to three weeks, offering an unprecedented window into how cells orchestrate their molecular machinery over time.

How the Technology Works

CytoTape consists of a flexible, thread-like protein fibre that self-assembles and elongates inside cells, designed with the help of artificial intelligence. As this molecular tape grows, it encodes colour-coded tags corresponding to different cellular signals, creating a sequential record of gene regulatory events. The concept mirrors how tree rings encode the physiological history of a growing tree, but at the cellular level.

Tracking Thousands of Brain Cells

The research team extended the technology into CytoTape-vivo, an adaptation for use in living organisms. Using this version, they achieved spatially resolved transcriptional activity recordings from over fourteen thousand neurons spanning multiple brain regions in mouse brains over several weeks. Crucially, the researchers found that CytoTape does not alter normal cell physiology or brain function.

Surprising Discoveries

The technology has already revealed unexpected findings about gene regulation, including complex waveforms and nonlinear temporal couplings among recorded cellular activities. These insights could help researchers understand how cells make decisions based on their transcriptional history.

Future Medical Applications

By comparing results between healthy and diseased brains, scientists may be able to pinpoint exactly what goes wrong across space and time in various conditions, potentially providing insights into future therapeutic interventions for neurological and other diseases.