Oxidative Stress and the Role of Immune Cells in Alzheimer's Disease: Therapeutic Implications and Future Perspectives.

Nidhi Puranik, Minseok Song
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Abstract

The most common neurodegenerative illness and leading cause of death in the world is Alzheimer's disease (AD), which is extremely expensive to treat. None of the AD treatments that are currently in the market with approval have any effect on disease progression. However, numerous clinical studies aimed at reducing amyloid beta (Aβ) plaque development, boosting Aβ clearance, or reducing neurofibrillary tangle (NFT) failed or had conflicting results. As oxidative stress (OS), mitochondrial dysfunction, and chronic neuroinflammation are implicated in numerous interconnected vicious cascades, research has revealed new therapeutic targets, including enhancing mitochondrial bioenergetics and quality control, reducing oxidative stress, or modulating neuroinflammatory pathways. This review examines the role of oxidative stress (OS), mitochondrial dysfunction, neuroinflammation, and the interplay between peripheral and central immune systems in the pathogenesis of AD. We highlight how OS and immune dysregulation drive chronic neuroinflammation, exacerbating AD progression. Immune cells and inflammatory molecules emerge as critical players in disease pathology. Overall, this review concludes that targeting OS and immune system crosstalk represents promising therapeutic strategies for mitigating AD progression, providing a foundation for future interventions.

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