New breathing technique may help the brain flush out harmful Parkinson’s proteins

A simple breathing technique using carbon dioxide may help clear harmful proteins from the brain in Parkinson’s. Researchers at the New Mexico Veterans Affairs (VA) Health Care System have discovered a potential new way to help the brain clear out harmful waste. This "brain flush" technique uses a simple breathing method to remove proteins that build up in people with Parkinson's. The science of the brain flush Our brains naturally clear out waste products using a system called glymphatic clearance. This usually happens during deep sleep when blood vessels in the brain pulse, acting like a pump to push fluid through the brain tissue and wash away unwanted proteins. In Parkinson's, these proteins, specifically one called alpha-synuclein, build up and cause problems. Because many people with the condition also struggle with sleep, this natural cleaning process often does not work as well as it should. How the new treatment works Dr Henry C. Lin and his team at the Veterans Affairs (VA) — the United States government department that provides healthcare for military veterans — found that they could trigger this cleaning process manually. They asked participants to breathe in a special mixture of 5% carbon dioxide for 35 seconds, followed by 35 seconds of normal room air. This cycle causes the blood vessels in the brain to widen and narrow repeatedly. This movement creates a pumping action that flushes the "rubbish" out of the brain and into the bloodstream, where the liver and kidneys can safely remove it. The study included 30 people with Parkinson's and 33 healthy volunteers. After just one 30-minute session, the researchers found higher levels of waste proteins in the participants' blood. This showed that the proteins had been successfully moved out of the brain and into the circulation. A safer approach to care Many current treatments for protein buildup can have serious side effects, such as brain swelling. However, this breathing technique appears to be very safe. The amount of carbon dioxide used is low, and because patients breathe normal air every half-minute, they do not experience uncomfortable symptoms. What happens next The VA's technology team in Cleveland is now building a prototype device. This device will look similar to a CPAP machine (Continuous Positive Airway Pressure) used for sleep apnoea and will help automate the timing of the carbon dioxide puffs. While the early results are very hopeful, more research is needed. The team is planning larger clinical trials to see if using the treatment regularly over a longer time can improve memory and movement. This discovery offers a new path forward for brain health that is simple, low-impact, and grounded in the way the body naturally heals itself.