Scientists have discovered that a common dietary sugar may play an unexpected role in helping ovarian cancer spread.
Researchers at The Wistar Institute reported in Nature Aging that fructose appears to act as a messenger released by chemotherapy-surviving cancer cells, allowing nearby cancer cells to become more invasive.
Ovarian cancer remains difficult to treat because it often returns after successful initial chemotherapy.
Standard platinum-based chemotherapy destroys many cancer cells, but a small number survive.
Until now, scientists believed these surviving cells mainly caused problems by growing again. The new study suggests they can also influence surrounding cancer cells through chemical communication.
The researchers collected substances released by cancer cells that had survived chemotherapy. They found that these molecules alone increased cancer spread in preclinical models, showing that direct contact with surviving cells was not required. Careful analysis identified fructose as one of the key signaling molecules responsible for this effect.
Fructose is widely consumed through sugary drinks, processed foods and products containing high-fructose corn syrup. The researchers also found that high dietary fructose promoted cancer cell spread even when chemotherapy was not involved. Although this does not prove that sugary foods worsen ovarian cancer in patients, it suggests diet deserves closer scientific attention.
Further experiments revealed how fructose works. It reduced cholesterol production inside neighboring cancer cells. Cholesterol helps cells remain attached to one another, so lowering cholesterol weakened these connections and allowed cancer cells to escape more easily, an essential step in metastasis.
This discovery created another unexpected question involving statins. Because statins also reduce cholesterol production, the research team examined their effects in laboratory models.
They found similar weakening of cell attachment and are now studying whether statins might influence chemotherapy responses. They strongly advise patients not to stop prescribed statins because no harmful effect has been demonstrated in people.
The researchers believe this newly discovered pathway may also exist in other abdominal cancers, including pancreatic, liver and colorectal cancers. Follow-up studies are already underway to determine whether the same mechanism operates across different tumor types.
The study highlights the importance of looking beyond cancer cells themselves and understanding the environment they create. Surviving cells may continue shaping tumor behavior long after chemotherapy has stopped, creating new opportunities for treatment.
Blocking these chemical signals could become another strategy for preventing cancer recurrence and spread.
Although the research is highly promising, it remains an early-stage preclinical study. Much more work is needed before doctors can recommend limiting fructose intake or changing cholesterol-lowering therapy during cancer treatment. Even so, the publication in Nature Aging provides compelling evidence that metabolism, nutrition and cancer biology are closely connected.
The study stands out because it identifies a completely unexpected communication pathway between cancer cells. Its greatest strength is the combination of mechanistic experiments and preclinical models, but confirmation in human patients remains essential.
If future clinical trials support these findings, they could lead to new dietary recommendations and novel therapies that improve outcomes for ovarian cancer and possibly several other aggressive cancers.
If you care about cancer, please read studies that artificial sweeteners are linked to higher cancer risk, and how drinking milk affects risks of heart disease and cancer.
For more health information, please see recent studies about the best time to take vitamins to prevent heart disease, and results showing vitamin D supplements strongly reduces cancer death.
Source: The Wistar Institute.
