Fisetin as a Senotherapeutic Agent: Biopharmaceutical Properties and Crosstalk between Cell Senescence and Neuroprotection

Aging is associated with a gradual decline in brain function and an exponentially increased risk of neurodegenerative conditions like Alzheimer's and Parkinson's disease. One of the major factors driving this age-related decline is the accumulation of "senescent" cells—dysfunctional, aging cells that stop dividing but resist programmed cell death. Instead, they release a cocktail of inflammatory signals that damage surrounding brain tissue and neurons.

This review explores the potential of fisetin, a naturally occurring flavonoid found in fruits like strawberries and apples, to act as a "senotherapeutic" agent. The authors highlight emerging preclinical evidence showing that fisetin can selectively clear these toxic senescent cells from the body, reduce chronic brain inflammation, and potentially protect neurons from age-related oxidative stress and dysfunction.

In addition to reviewing existing biological studies, the researchers utilized computational (in silico) modeling to predict how fisetin behaves within the human body. Their analysis suggests that while fisetin is a safe and biologically active compound, it possesses poor water solubility and only a moderate ability to cross the blood-brain barrier. This highlights the necessity for specialized, advanced delivery systems (like liposomes or nanoparticles) to maximize its neuroprotective benefits in humans.