Targeting Metal Imbalance and Oxidative Stress in Alzheimer’s Disease with Novel Multifunctional Compounds

Alzheimer’s disease (AD) is considered to be one of the most common types of dementia, threatening the health of elderly individuals. Enhancing the brain’s cholinergic activity is currently the primary therapeutic strategy for treating AD patients. Acetylcholine and butyrylcholine are key targets in this approach, as they function as neuromodulators within the cerebrum—particularly in its various cholinergic regions responsible for essential functions like memory, thought, inspiration, and excitement. Oxidative stress and free radicals are considered to play a crucial role in the pathogenesis of AD and may be key factors in its etiology. Additionally, oxidants and oxidative stress-induced products can upregulate amyloid precursor protein (APP) expression, promoting Aβ aggregation. Another major factor in the pathogenesis of AD is the imbalance of metal homeostasis in the brain. Notably, the mammalian brain contains significantly higher concentrations of Cu, Zn, and Fe ions compared to other tissues. The present review focuses on novel bifunctional metal chelators with potential antioxidant activity for the treatment of AD.