Science News from research organizations Your morning coffee could one day help fight cancer In the future, your morning coffee might help switch on precision gene therapies against cancer and diabetes. Date: February 28, 2026 Source: Texas A&M University Summary: Scientists at Texas A&M are turning an everyday pick-me-up into a high-tech medical switch. By combining caffeine with CRISPR gene editing, researchers have created a system that allows cells to be programmed in advance — and then activated simply by consuming a small dose of caffeine from coffee, chocolate, or soda. The approach, known as chemogenetics, lets scientists precisely turn gene-editing activity on and off inside targeted cells, including powerful immune T cells that can fight cancer. Share: Facebook Twitter Pinterest LinkedIN Email FULL STORY A new gene-editing system uses caffeine as a trigger, allowing scientists to switch CRISPR activity on inside engineered cells — and even power up cancer-fighting T cells. Credit: Shutterstock Could something as common as coffee play a role in treating cancer? Scientists at the Texas A&M Health Institute of Biosciences and Technology believe it might. Their research combines caffeine with CRISPR, a powerful gene editing tool known as clustered regularly interspaced short palindromic repeats, to explore new ways to treat chronic diseases such as cancer and diabetes. The approach relies on a strategy called chemogenetics, which allows researchers to control cells using specific chemical signals. Yubin Zhou, professor and director of the Center for Translational Cancer Research at the Institute of Biosciences and Technology, focuses on studying disease at the cellular, genetic, and epigenetic levels. Over the course of more than 180 scientific publications, he has used advanced technologies including CRISPR and chemogenetic systems to better understand and potentially treat complex illnesses. Chemogenetics involves directing cell behavior with small external molecules, often medications or dietary compounds, that activate specially engineered switches inside targeted cells. Unlike conventional drugs that can affect many tissues throughout the body, this method is designed to work only in cells that have been programmed to respond. How Caffeine Activates Gene Editing Zhou's latest work builds on earlier discoveries about genetic switches inside cells. His team developed a new chemogenetic system that pairs CRISPR with caffeine to control when gene editing happens. The process starts by preparing cells in advance. Using established gene transfer techniques, researchers insert genes that produce three key components: a nanobody, its matching target protein, and the CRISPR machinery. Once inside the cell, these components are produced naturally. After this setup, the system can be controlled from the outside. When a person consumes about 20 mg of caffeine, such as from coffee, chocolate, or soda, it causes the nanobody and its partner protein to bind together. This interaction activates CRISPR, which then carries out specific gene modifications within the cell. This strategy also makes it possible to activate T cells in ways that other gene editing approaches cannot. T cells act as the immune system's memory, preserving instructions from past infections so the body can respond quickly in the future. Being able to switch these cells on intentionally could give scientists a new tool for directing immune responses against particular diseases. A Reversible On and Off Gene Switch The researchers also discovered that certain drugs can reverse the process. These drugs cause the paired proteins to separate, which halts additional gene editing. This added control is important for developing safe and adjustable chemogenetic therapies. In a medical setting, doctors could temporarily pause gene activity if a patient experiences stress or side effects from treatment, then restart it later when conditions improve. This makes it possible to fine tune gene control over time rather than leaving it continuously active. "You can also engineer these antibody-like molecules to work with rapamycin-inducible systems, so by adding a different drug like rapamycin, you can achieve the opposite effect," Zhou said. "For example, if at first proteins A and B are separate, adding caffeine brings them together; conversely, if proteins A and B start out together, adding a drug like rapamycin can cause them to dissociate." Rapamycin is a widely available immunosuppressant drug traditionally used as an anti-rejection regiment for organ transplant patients. It works by preventing white blood cells from attacking foreign material in the body. Because it is already affordable and commonly used, rapamycin is a strong candidate for applications in this new system. Caffebodies and Future Diabetes and Cancer Therapies When a specially engineered nanobody responds to caffeine, researchers refer to it as a "ca