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Mice with advanced Alzheimer’s disease were able to fully recover their cognitive abilities in a new study, challenging the long-held belief that the disease is irreversible.The research, conducted in the USA, shifts the focus from hallmark features like amyloid plaques and tau deposits to a basic aspect of cell function: energy metabolism.
the study suggests that disruptions in how brain cells produce and use energy play a critical role in the development of Alzheimer’s, and restoring that energy balance may hold the key to reversing its effects.
Energy Imbalance: A New Alzheimer’s Target
Could restoring cellular energy reverse the devastating effects of Alzheimer’s disease? New research suggests its possible, at least in animal models.
Every cell in the body relies on energy to operate, and a molecule called NAD⁺ (nicotinamide adenine dinucleotide) is central to this process. NAD⁺ is involved in vital functions like energy production within mitochondria, DNA repair, and controlling inflammation. When NAD⁺ levels decline, cells gradually lose their ability to function optimally.
The new study reveals that energy metabolism is severely disrupted in Alzheimer’s disease.While NAD⁺ naturally decreases with age, the decline is substantially more pronounced in the brains of Alzheimer’s patients and in corresponding mouse models. The greater the disruption, the more severe the memory loss, inflammation, and damage to nerve cells and the blood-brain barrier.
Did you know? – NAD⁺ is not a vitamin, but a coenzyme found in all living cells. it’s essential for turning the food you eat into the energy your body needs.
Two Mouse Models, One Surprising Result
Researchers utilized two distinct mouse models to investigate this phenomenon. One model replicates the amyloid pathology characteristic of early Alzheimer’s, where protein deposits accumulate.The other model mimics tau pathology, where abnormally modified tau proteins clump together within nerve cells. Both amyloid and tau processes are considered central to the disease’s progression.
Two mouse models-one amyloid, one tau-showed cognitive recovery when energy balance was restored.
- A new study suggests Alzheimer’s disease
Pro tip – Maintaining a healthy lifestyle, including regular exercise and a balanced diet, can help support healthy NAD⁺ levels as you age.
To restore NAD⁺ levels, the researchers used nicotinamide riboside (NR), a form of vitamin B3.Administering NR to the mice resulted in a remarkable recovery of cognitive function in both models. Mice with amyloid pathology regained their ability to navigate mazes, while those with tau pathology showed improved memory and learning.
The improvement wasn’t just behavioral. Researchers observed a reduction in inflammation, improved blood-brain barrier function, and a decrease in both amyloid and tau pathology within the brains of the treated mice. This suggests that restoring energy metabolism doesn’t just mask symptoms; it addresses the underlying causes of the disease.
Reader question – Could this research translate to a human cure? What are the potential challenges in applying these findings to people with Alzheimer’s?
The study, led by researchers at the University of California,
