Neurodegenerative diseases are characterized by the degeneration of nerve cells in the brain over time. These diseases, such as Alzheimer’s disease (AD), Frontotemporal dementia (FTD), and Amyotrophic lateral sclerosis (ALS), lead to the death of highly active cells known as neurons. Neurons require large amounts of energy and are susceptible to DNA damage, which accumulates over time through mutations.
Researchers at Boston Children’s Hospital and Harvard Medical School conducted a study to analyze the DNA mutations in neurons of individuals with and without neurodegenerative diseases. They found that affected neurons in AD, FTD, and ALS patients contained an unusually high number of two-base pair deletions compared to healthy control neurons.
The researchers identified a signature DNA repair protein called TOP1 that was associated with the DNA mutations in diseased neurons. Aberrant TOP1 activity led to frequent single-stranded DNA breaks, ultimately causing widespread DNA damage in neurodegenerative diseases.
These findings suggest that targeting TOP1 activity or improving DNA repair processes may be a potential treatment strategy for a variety of neurodegenerative diseases. Understanding the underlying mechanisms of DNA damage in these diseases could lead to new therapeutic approaches in the future.
Source: sciworthy.com
