# Synthetic gene circuit selectively kills cancer cells in mouse study

_Published Thursday, November 5, 2026 at 4:06 PM EST · Science · Latest · Tier 2 — Notable_

Researchers developed a synthetic gene circuit that selectively triggers cancer-cell death and produced tumour regression in mouse models of colorectal and pancreatic cancer, a Nature study reports. The circuit, called FAST, exploits errors in how cancer cells read genetic instructions when making proteins.

Specific pairs of genetic code units cause the protein-making machinery to shift its reading position preferentially in cancer cells. FAST uses that shift to switch on gasdermin D, a protein that triggers inflammatory cell death.

Delivery through an AAV9 viral vector also activated immune responses and enhanced effects with immune checkpoint blockade. The proof-of-concept experiments spared normal tissues from detectable toxicity in the tested models.

## Sources

- [Nature](https://www.nature.com/articles/s41586-026-11200-4)

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Canonical: https://techandbusiness.org/newswire/5xsQOnJHeYNVROicwKp_VL
Published: 2026-11-05T21:06:52.823Z
Story chronology: 2026-11-04T00:00:00.000Z
Retrieved: 2026-11-06T22:48:32.520Z
Publisher: Tech & Business (techandbusiness.org)