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U.S Scientists Created The World’s First Non-Invasive Nasal Drop To Treat Glioblastoma. The Drop Uses Nasal Nerves To Bypass The Blood-Brain Barrier, Activating STING In Brain Immune Cells To Turn Cold Tumors Hot For Immune Attack. In Mice, The Drop Plus T-Cell Drugs Eradicated Tumors And Provided Long-Term Immunity. Human Trials Are Next.

Nasal drops fight brain tumors noninvasively – WashU Medicine

https://medicine.washu.edu/news/nasal-drops-fight-brain-tumors-noninvasively/

Researchers at WashU Medicine have developed a nanomaterial-based, noninvasive medicine that successfully eliminated deadly tumors in mice.