Scientists have finally solved a 30-year-old biological puzzle by discovering how a crucial micronutrient linked to brain health and cancer defense enters human cells.
The Research: A 30-Year Hunt for a Missing Gateway
An international team led by researchers from the University of Florida and Trinity College Dublin published their findings in the Proceedings of the National Academy of Sciences in April 2026. The study, supported by the National Institutes of Health and Research Ireland, identified the specific gene responsible for transporting queuosine into cells.
"For over 30 years, scientists have suspected that there had to be a transporter for this nutrient, but no one could find it," said Valérie de Crécy-Lagard, a microbiology and cell science professor at the University of Florida and one of the study's principal investigators. "We've been hunting for it for a long time."
The researchers discovered that the gene SLC35F2 acts as the cellular gateway for queuosine. This gene had previously been studied for its role in viral entry and cancer drug transport, but its normal function in healthy biology was unclear until now.
"We have known for a long time that queuosine influences critical processes like brain health, metabolic regulation, cancer and even responses to stress, but until now we haven't known how it is salvaged from the gut and distributed to the billions of human cells that take it in," explained Vincent Kelly, professor at Trinity College Dublin and joint senior author of the study.
Why This Discovery Matters for Your Brain
Queuosine plays a key role in how your body builds proteins by altering transfer RNA—the molecules that help cells interpret DNA and produce proteins correctly. "It's like a nutrient that fine-tunes how your body reads your genes," de Crécy-Lagard noted.
This discovery reshapes our understanding of how diet and gut microbes influence gene expression and overall health. Since queuosine comes from certain foods and gut bacteria, this research highlights the profound connection between what you eat, your microbiome, and your cognitive function.
The identification of this transport mechanism opens new possibilities for understanding how nutrients affect memory, learning, and stress response at a cellular level.
What You Can Do
While specific queuosine-rich foods aren't yet fully mapped, this research reinforces the importance of a diverse, nutrient-rich diet for brain health. Focus on consuming a variety of whole foods to support your gut microbiome, which produces and helps absorb essential nutrients like queuosine. Maintaining gut health through fiber-rich foods and fermented products may indirectly support your brain's nutrient supply.
Source: ScienceDaily Mind & Brain
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