The Cancer Gene That Takes a Shortcut to Make Cells Divide
Most of the cells in your body are not dividing. They sit quietly, like a class waiting for the teacher, in a dormant state — ready to divide if needed, but held back. The body works hard to keep them there: if cells divided whenever they felt like it, organs would grow out of control and tumours would form. Keeping that balance is one of the body's hardest jobs.
A new study from the University of California, Santa Cruz, published in The EMBO Journal on 6 November 2026, has found that a gene involved in many cancers, called E2F1, can break that balance with a shortcut — and the shortcut is surprisingly simple.
The normal route, and the shortcut
To wake a dormant cell and make it divide, the body normally has to do something physical: unpack the cell's DNA. Inside the nucleus, DNA is wound tightly around proteins, like thread on a spool. Before a cell can read the instructions for division, that thread has to be unwound — a slow, carefully controlled process, triggered by nutrients and growth signals from outside the cell.
E2F1, the researchers found, skips that step. The E2F1 protein can bind directly to a small patch of DNA that is still tightly packed, and switch on the genes for cell division anyway — without unpacking the genome much, or at all. "The surprising part is, unlike the typical process, E2F1 is able to activate the cell cycle genes without physically unpacking the genome much or at all," said Ali Shariati, associate professor of biomolecular engineering, who led the work with Seth Rubin, professor of chemistry and biochemistry.
That makes E2F1 behave like a rare class of genes scientists call "pioneer factors" — genes that can unlock tightly packed DNA and reprogramme a cell's fate. The team also found that cells sense a threshold: once E2F1 levels cross a certain line, dormant cells start to divide.
Why it matters for cancer
The shortcut has limits: the researchers found cells can divide at most three times this way without extra growth signals. But it is much faster than the normal route, and the team suspects cancer cells may exploit it. "Cancers may overcome the typical checks and balances that our cells are using to maintain a dormant state, dysregulating and increasing the level of E2F1 to find a shortcut back to the cell cycle," Shariati said.
Understanding the shortcut could lead to more precise treatments. Rubin's lab is now asking whether E2F1 itself — rather than the proteins that control it — could be blocked directly, and which specific cancers would benefit. That work is still ahead of us; this study is a discovery about how cells work, not a treatment.
For students, the story brings GCSE biology to life: the cell cycle, genes switching other genes on and off, and the idea that cancer is what happens when the body's control systems are bypassed. It also shows how science works — a careful experiment, live imaging of single cells, and a result that changes what the textbooks say about how division begins.
If your child is studying cell division and wants to see why it matters beyond the exam — or needs help making sense of genes, DNA and the cell cycle — a first lesson in biology can start with this story. Book your first lesson
Sources:
- University of California, Santa Cruz via phys.org, "Cancer-linked gene uses 'shortcut' to trigger cell division", 6 November 2026: https://phys.org/news/2026-11-cancer-linked-gene-shortcut-trigger.html
- Lodewijk, G. et al., "E2F1 induces a transcriptional program for G0-G1 phase reentry without changing chromatin accessibility", The EMBO Journal (2026). DOI: 10.1038/s44318-026-00936-4
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