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Researchers at the University of Virginia have developed a novel approach to fighting glioblastoma by using focused ultrasound and nanoparticles to sneak cancer-fighting microRNAs past the brain's protective barrier. The treatment targets multiple cancer-driving genes at once and extended survival in animal models. Clinical trials are the next goal.
Glioblastoma — the most common and aggressive malignant brain tumor in adults — has long stumped oncologists, partly because the brain's blood-brain barrier blocks most drugs from reaching the tumor. Now, scientists at the University of Virginia think they've found a clever workaround.
The UVA team, led by Dr. Roger Abounader, combined focused ultrasound, microscopic bubbles, and nanoparticles to temporarily open the blood-brain barrier and deliver microRNAs — tiny genetic molecules — directly into the brain. Once inside, these microRNAs suppress multiple genes that drive tumor growth simultaneously, something conventional drugs struggle to do without causing serious side effects. Animal studies showed the approach slowed tumor growth and extended survival.
Key Takeaways:
Why it matters: Glioblastoma claims more than 13,000 lives in the U.S. each year, and current treatments offer limited survival benefit. A therapy that can bypass the blood-brain barrier and hit multiple cancer targets at once could be a meaningful advance for one of medicine's toughest challenges.
