Researchers at The Florey have developed a new mRNA technology approach to target the toxic protein tau, which is known to accumulate in patients with Alzheimer’s disease and other forms of dementia. This marks the first instance where mRNA has been explored for potential use in Alzheimer’s disease treatment.
Dr. Rebecca Nisbet, who led the research team at The Florey, compares mRNA to an instruction manual for cells. Once the cell absorbs the mRNA, it proceeds to produce an antibody. The research team harnessed mRNA to instruct cells in cell models to generate RNJ1, an antibody devised by Dr. Nisbet to target tau, a harmful protein that forms clumps in the brain cells of individuals with dementia. According to Dr. Nisbet, this is the initial instance where a tau antibody can directly interact with tau within the cell.
PhD student Patricia Wongsodirdjo, the lead author of the paper, anticipates that their technique can extend to various therapeutic antibodies. Their vision is for this strategy, in conjunction with nanoparticle packaging, to enhance the targeting of toxic substances in the brain and enhance patient outcomes as compared to standard approaches. Dr. Nisbet acknowledges that further research is required on RNJ1. She explains that while emerging Alzheimer’s treatments like lecanemab show promise, their production is cost-intensive and ineffective in delivering an active antibody into brain cells. Conventional antibodies, like lecanemab, can eliminate some harmful plaque surrounding brain cells but cannot reach toxic proteins like tau present within the cells themselves.
This study positions The Florey as a significant contributor to the mRNA field and opens up new avenues for treating Alzheimer’s disease and other forms of dementia through targeted therapies using mRNA technology approach.
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