In a groundbreaking discovery, researchers from the University of Florida and Trinity College Dublin have solved a 30-year-old puzzle about a nutrient called queuosine (pronounced “cue-o-scene”). This micronutrient is essential for brain health, memory, stress response, and even fighting cancer.
The study, published on June 17, 2025, in the Proceedings of the National Academy of Sciences, identified the gene SLC35F2 as the key transporter that helps queuosine move into human cells.
This finding could open doors to new treatments for brain disorders, stress-related conditions, and cancer.
What Is Queuosine and Why Is It Important?
Queuosine is a micronutrient that our bodies cannot make on their own.
Instead, we get it from certain foods or from helpful bacteria in our gut. Once inside our cells, queuosine acts like a tiny editor, fine-tuning how our genes work.
It helps our cells read genetic instructions accurately, which is crucial for making proteins that keep our bodies healthy.
This process supports brain function, improves memory, helps manage stress, and may even prevent cancer by keeping cells from growing out of control.
Without enough queuosine, our bodies may struggle with gene expression, leading to problems like memory issues, stress overload, or a higher risk of certain cancers.
The discovery of SLC35F2 as the transporter for queuosine is a big deal because it shows how this nutrient gets to where it’s needed in our cells. Before this, scientists knew queuosine was important but didn’t understand how it traveled through the body.
What Does This Discovery Mean?
This breakthrough is exciting because it could lead to new ways to treat serious health problems. For example:
- Brain Health: Queuosine supports memory and brain function, so boosting it might help with conditions like Alzheimer’s or other neurological disorders.
- Stress Response: It helps the body handle stress better, which could improve mental health and reduce stress-related illnesses.
- Cancer Defense: Queuosine may stop cancer cells from growing by ensuring cells follow their genetic instructions properly. This could lead to new cancer treatments.
- Metabolic Health: It plays a role in how our bodies process energy, which could help with conditions like diabetes or obesity.
The gene SLC35F2, which was previously studied for its role in transporting cancer drugs and viruses, now has a new purpose: delivering queuosine to every cell in the body. This discovery could inspire therapies that increase queuosine levels to improve overall health.
Can Our Bodies Produce Queuosine?
Unfortunately, humans cannot produce queuosine on their own. We rely on two main sources:
- Gut Bacteria: Friendly bacteria in our intestines make queuosine for us. A healthy gut microbiome is key to producing enough of this nutrient.
- Diet: Certain foods contain queuosine or its building blocks, which our bodies can use.
Foods That Boost Queuosine
While the exact foods richest in queuosine are still being studied, you can support your gut bacteria and queuosine levels by eating a diet rich in:
- Probiotic Foods: Yogurt, kefir, sauerkraut, kimchi, and other fermented foods help feed the good bacteria in your gut that produce queuosine.
- Prebiotic Foods: Foods like bananas, onions, garlic, asparagus, and whole grains act as “food” for your gut bacteria, helping them thrive.
- High-Fiber Foods: Beans, lentils, fruits, vegetables, and nuts support a healthy gut microbiome.
- Lean Proteins and Plant-Based Foods: Some studies suggest that queuosine or its precursors may be found in certain meats, fish, or plant-based foods, though more research is needed to pinpoint the best sources.
Eating a balanced diet and keeping your gut healthy are the best ways to ensure your body has enough queuosine. Avoiding processed foods and taking care of your gut with probiotics or prebiotics can make a big difference.
Why This Study Matters
The study, funded by the National Institutes of Health, Research Ireland, and Health and Social Care in Northern Ireland, involved experts from multiple institutions, including San Diego State University and Ohio State University.
Published in the Proceedings of the National Academy of Sciences (DOI: 10.1073/pnas.2425364122), it marks a major step forward in understanding how nutrients affect our genes. According to Valérie de Crécy-Lagard, a microbiology professor at the University of Florida, queuosine “fine-tunes how your body reads your genes.” Vincent Kelly from Trinity College Dublin added that it influences brain function, stress resilience, and cancer biology.
This discovery could lead to new therapies, such as supplements or drugs that boost queuosine levels or improve how SLC35F2 works in the body. It also highlights the importance of a healthy gut, as gut bacteria play a big role in supplying this nutrient.
What’s Next?
Scientists are now exploring how to use this discovery to develop treatments for brain disorders, cancer, and other conditions. They’re also studying how diet and gut health can naturally increase queuosine levels. In the meantime, you can support your body by eating gut-friendly foods and maintaining a healthy lifestyle.
This exciting finding shows how small nutrients can have a big impact on our health. By solving the mystery of queuosine and SLC35F2, researchers have given us a new piece of the puzzle for living healthier, longer lives.
References:
- University of Florida News: UF, Trinity College Team Cracks Micronutrient Mystery
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