Saving Neurons in Alzheimer’s Disease


As the leading cause of dementia, nearly 5 million people struggle with Alzheimer’s in the U.S. Starting with memory loss and confusion, patients will then experience difficulties with speech and thinking. There is no cure for Alzheimer’s and the cause remains unknown. However, a newly discovered protein has become a major target for research. Sticky clumps of a protein have been discovered in the brains of people who have died from Alzheimer’s. Now, that protein is known as “beta-amyloid” and no drugs have been successful against it thus far. Scientists believe that the process leading up to Alzheimer’s occurs long before the diagnosis. Therefore, once people finally join these clinical trials it is too late.

Early Detection of Alzheimer’s

Researchers from Tokyo Medical and Dental University are researching the brain before the onset of Alzheimer’s. This research focuses on mild cognitive impairment (MCI), an early phase of cognitive decline. This describes the small changes, such as forgetting someone’s name or constantly losing things, before Alzheimer’s occurs. Fortunately, not everyone with MCI develops Alzheimer’s disease later on. However, researchers still treat this as a window into the early stages of Alzheimer’s. In current research, scientists measured neuronal death in mouse models of Alzheimer’s disease, as well as people with MCI and Alzheimer’s. Dying neurons release a protein called HMGB1. This protein measures how many neurons in the brain have died. The study included 26 people with MCI and 73 with Alzheimer’s. A new test locates these neurons as they are dying due to the effects of Alzheimer’s. The lead author of this study says, “Neuronal death is…notoriously difficult to detect…because dying cells cannot be stained using chemical or immunohistological methods.” To the surprise of many experts, the neurons were dying earlier than expected. In fact, this occurred more in patients with MCI than with Alzheimer’s.

Further, scientists may have discovered what has caused these neurons to die so early on. Scientists cited the protein YAP as the cause. There have been links between YAP and Alzheimer’s in the past, now found in lower levels in MCI patients. There have been findings about YAP found in clumps of beta-amyloid,. These are considered lost YAP, which could be the main cause of Alzheimer’s. Saving neuron’s in Alzheimer’s disease patients may be crucial, and possible.

Saving Neurons in Alzheimer’s Disease

Fortunately, experts believe this discovery could lead to a new treatment for Alzheimer’s. Lead author Hikari Tanaka say that proving neuronal death is “YAP-dependent…novel Alzheimer’s disease therapies will be developed.” Gene therapy treatments have been performed on mice to replace the missing YAP protein. However, researchers will need to resolve important safety concerns before trying this therapy on humans. Still, experts claim their discovery could make it easier for doctors to diagnose Alzheimer’s.

 

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