Researchers in China discovered that an injection of nanoparticles into the brain could reverse the symptoms of Parkinson’s Disease.
The treatment demonstrates the potential to alleviate symptoms including cognitive decline, anxiety, and depression through a less invasive approach. Researchers administered nanoparticles into the brains of mice and discovered that, when activated by a laser, these particles could mitigate the movement-related symptoms of the disease. This is the latest in a string of developments aimed at making Parkinson’s treatment less invasive.
Parkinson’s Disease and Nanoparticles
PARKINSON’S BREAKTHROUGH: NANOPARTICLES REVERSE SYMPTOMS IN MICE
— Mario Nawfal (@MarioNawfal) January 19, 2025
Mice with Parkinson’s-like symptoms got a high-tech upgrade: tiny gold-coated particles and a bit of light therapy brought their brains back to life.
This treatment clears toxic proteins, restores brain function,… pic.twitter.com/FpSuJMqqRo
Parkinson’s disease is a progressive neurodegenerative disease that has a significant in motor skills and control of movement. It occurs when α-Synuclein protein deformation damages or kills nerve cells in the substantia nigra. This is the brain region that controls movement and chemical signaling.
Substantia nigra and overall brain degeneration leads to decreased dopamine production. Dopamine, also known as the “feel-good chemical”, is a neurotransmitter essential for regulating mood and vital for precise and coordinated muscle movements.
Parkinson’s disease symptoms include tremors, stiffness, slowness of movement, and balance problems. As the disease progresses, individuals may experience cognitive decline, mood disorders, and difficulty with speech and swallowing.
Parkinson’s Treatments
A common treatment for the disease is deep brain stimulation. This treatment is invasive, as it requires the doctors to put electrodes in the patient’s brain. The electrodes are effective in alleviating certain symptoms by delivering electrical impulses directly to the brain. However, they also exacerbate anxiety and depression symptoms and contribute to cognitive decline.
But newer, less-invasive treatments still can’t reach the brain’s depth like deep brain stimulation electrodes. However, Chunying Chen, a professor at China’s National Center for Nanoscience and Technology, and her team may have developed a way to impact the brain without an implanted electrode directly.
The new treatment, published in the journal Science Advances, centers around nanoparticles injected into the brain and activated through external infrared lasers. The nanoshells are made of a gold outer shell that releases “targeting” and “degradation” arms that combine to attack the deformed α-synuclein. Meanwhile, the laser activates the gold outer shell, which in turn activates the brain’s dopamine-producing centers.
By addressing the α-synuclein protein and stimulating dopamine creation, the method addresses the symptoms while improving motor function. The researchers say that the conclusion reached with the rat experiment lays a solid foundation for future investigations into the potentially revolutionary Parkinson’s Disease treatment
“This proof-of-concept study provides valuable insights for future investigations aiming to expand the field of direct brain stimulation without the need for additional implantation of conduits or genetic manipulation,” said the research team.
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