Using ultrasound to deliver drugs to combat Alzheimer's disease

  • 2 Min To Read
  • 5 months ago

In a recent study published in the New England Journal of Medicine, researchers from West Virginia University explored a potential breakthrough in Alzheimer's therapy through a combination of focused ultrasound therapy and a medication called Aducanumab. The study focused on reducing cerebral amyloid-beta load, a biomarker for neurodegeneration, in patients with Alzheimer's.

Alzheimer's disease is characterized by accelerated deterioration in memory, motor function, and other symptoms. One of the key changes in the brain of Alzheimer's patients is the accumulation of amyloid-beta peptides in neural tissue. These peptides are produced in all individuals, but those with Alzheimer's fail to clear them from the brain, leading to significant amyloid-beta loads and neurodegeneration.

Aducanumab, developed by Biogen Inc., is a monoclonal antibody that binds to the amyloid peptide and reduces its buildup in the brain. However, delivering the drug to the brain has been challenging due to the blood-brain barrier, which regulates the transfer of solutes between the nervous system and the rest of the body.

To address this issue, the researchers used focused ultrasound to create microscopic openings in the brain tissue, allowing for more efficient delivery of Aducanumab. Focused ultrasound uses sound waves to create defined images and can change the composition of the target area. The study enrolled three patients with Alzheimer's who had never taken Aducanumab before. The patients received the medication alone for the first six months and then underwent blood-brain barrier opening using focused ultrasound in the second six-month period.

The results showed a significant reduction in amyloid-beta load during the ultrasound portion of the experiment compared to the ultrasound-free period. However, it's important to note that the study had a small sample size, and further research with a larger number of participants is needed to draw conclusive results.

There are also potential side effects associated with opening the blood-brain barrier, including brain damage and internal bleeding. Additionally, the cost of Aducanumab is currently high, making it inaccessible for many Alzheimer's patients.

Despite these limitations, the focused ultrasound drug delivery system shows promise for future Alzheimer's treatments. While Aducanumab may not be the ultimate solution, this drug delivery mechanism could be applied to other brain-targeted drug cocktails. Continued research and advancements in technology are needed to make this therapy more accessible and affordable.

Overall, this study provides a glimpse into the potential of regenerative medicine in addressing Alzheimer's disease. The combination of focused ultrasound therapy and medication could offer hope for thousands, if not millions, of individuals suffering from this devastating condition in the future.


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