The path to conquering dementia has opened, the world's first secret passage to empty the brain's trash can has been discovered.
Park Mi-ae reporter update 2026.07.22 11:12 comment 0
The day is fast approaching when dementia, a disease that everyone fears most as they age, can be treated with a single, nostril-spraying medication. The precise outlet for the human brain to dump its own deadly toxic waste has finally been revealed to the world by Korean scientists. The mystery that the global neuroscience community had been unable to solve for as long as 250 years has been unsolved, marking a new phase in the history of human brain disease treatment. Regional information
Our brains are like a giant factory that operates 24 hours a day, consuming enormous energy without rest. Just as exhaust fumes and waste inevitably come out when a factory is running, the brain also constantly produces waste. If this waste does not leave the body in time and accumulates in the brain, neurotoxic proteins such as amyloid beta destroy brain cells and cause degenerative brain diseases like Alzheimer's. East Asians and Diaspora
Scientists have long known that cerebrospinal fluid, a fluid that protects the brain, washes it away and transports waste products outside. However, no one knew how the cerebrospinal fluid managed to penetrate the meninges, a tough and solid protective layer, and exit.
The research team led by Director Ko Kyu-young, who leads the Vascular Research Division at the Institute for Basic Science, discovered the first gateway to this hidden sewer and named it "arachnoid squis." This is the first time we have confirmed that there are tiny, almost invisible holes in the translucent arachnoid membrane located in the middle of the three layers of membranes surrounding the brain. The research team mobilized special mice with lymphatic vessels that were manipulated to glow fluorescently and cutting-edge 3D stereoscopic imaging technology. As a result, the entire drainage pathway was perfectly captured, where cerebrospinal fluid exits these tiny arachnoids, seeps into the meningeal lymphatic vessels, passes through the nasal lymphatic vessels inside the nose, and ultimately flows to the lymph nodes in the neck. The results of this study, which completely completed the map of how trash is discarded in the brain, were immediately published in Cell, the world's most prestigious academic journal, in recognition of their remarkable achievements. Regional information
The reason this discovery is even more shocking and welcome is that it has uncovered a sure key to directly treating dementia. The research team observed that as the mice aged, the size of the arachnoid sine solitary sine, which removes waste from the brain, shrank, and even the surrounding lymphatic vessels became emaciated. When the sewer is clogged, it was only natural that trash would accumulate in the brain. The research team did not stop there and administered VEGF-C, a gene that helps with lymphatic vessel formation, to the mucosa inside the nasal mucosa of aged mice. Then, an astonishing magic occurred. As the lymphatic vessels around the nose and front of the brain grew strong again, the blocked outlet was opened, and the brain cleaning ability of the old mouse was perfectly restored to the level of a healthy young mouse.
[Schematic diagram of cerebrospinal fluid drainage pathway through the arachnoid socket into the meningeal lymphatic system of the olfactory bulb and cerebrospinal fluid drainage recovery through intranasal VEGF-C gene administration] The cerebrospinal fluid present in the subarachnoid space passes through the arachnoid socket between the olfactory bulbs and is absorbed into adjacent meningeal lymphatic systems. Afterward, the meningeal lymphatic vessels connect to the olfactory mucosa lymphatic vessels along the trabecular ossic plate opening, draining cerebrospinal fluid. With aging, the olfactory mucosal lymphatic vessels and nasal lymphatic systems decrease, leading to a decline in cerebrospinal fluid drainage function. However, intranasal administration of the VEGF-C gene restores the reduced lymphatic vessels and restores cerebrospinal fluid drainage to the lymph nodes to levels seen in young mice.
This shows hope that dementia can be cured simply through a non-invasive method of administering medication into the nose, without requiring dangerous head-opening surgeries or using strong medications that can cause systemic side effects. The research team has already confirmed the same arachnoid sinus structure in primate experiments similar to humans, securing key clues for human application.
The day is not far off when a new type of treatment that can unclog the clogged drains of an aging brain and restore memory will emerge.