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Anti-cancer gene discovered: Perspective for therapy

Starting with the tiny fruit fly, and then moving into mouse and human patients, researchers at VIB connected to the Center for Human Genetics (K.U. Leuven) showed that the same gene suppresses cancer in all three. Reciprocally, switching off the gene leads to cancer. The scientists think there is a good chance that the gene can be switched on again with a drug. They report their findings in the reputed scientific journal PLoS Biology.

Specialized cells

All of us begin our lives as one cell, which divides into two, four, eight into a human of a few billion cells. Almost all cells in an adult human skin cells, liver cells, eye lens cells, nerve cells, insulin-producing cells etc are highly specialized to perform a specific function. They are no longer capable of taking on another task: when a skin cell divides, you get more skin cells. During the growth from an embryo to an adult human, the cells become more and more specialized ("differentiated", biologists say).

Cancer cells are an exception to that rule: they are much less specialized, and feel at home in different places in the body. Researchers have long believed that cells must take the last step in their specialization to be better protected from turning into cancer cells. However, this was not proven in a living organism.

Suppressing cancer

Wouter Bossuyt from the Group of Bassem Hassan and their fellow VIB researchers at K.U.Leuven, now demonstrate with fruit flies that master control genes steering the specialization step indeed inhibit tumor formation. The specific example the VIB scientists used, are the ones biologists call the Atonal genes. These genes are very similar to each other in all species, from flies to humans.

With mice, and in collaboration with colleagues from the United States, they showed that loss of one of those genes, Atonal homolog 1 or ATOH1, causes colon cancer. The gene regulates the last step in the specialization to epithelial cell of the colon. Humans with colon cancer frequently have an inactivated ATOH1 gene, the researchers observed.


The researchers could in a test tube reactivate the gene in human colon cancer cells. The tumor cells stopped growing and committed suicide. Since they were able to switch the gene on with a reasonably simple chemical, this opens possibilities to one day perhaps switch the gene back on in living patients. It will be very important in the future to study in detail how exactly ATOH1 does performs its anti-cancer job


Contact: Sooike Stoops
VIB (the Flanders Institute for Biotechnology)

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