1,The "Invisible Killer" of Brain Aging: Oxidative Stress
As you age, have you noticed your memory isn't as sharp and your reactions seem slower? Behind this lies an "invisible killer" – oxidative stress. Excess reactive oxygen species (ROS) act like "rust," damaging mitochondria in brain cells, accelerating neuronal aging, and potentially even triggering neurodegenerative diseases like Alzheimer's.
So, how can we "lock" this aging process at the metabolic level? The latest research from Sun Yat-sen University reveals the answer: Alpha-Ketoglutarate (AKG), a potential "metabolic key" to delaying brain aging.
Figure 0: This article is based on work published by Shenzhen Xintianhe Biotechnology and Sun Yat-sen University team.
2,AKG: A "Versatile Player" in Energy Metabolism, A "Guardian" of Brain Health
AKG is a central metabolite in the Tricarboxylic Acid (TCA) Cycle, acting like a "key cog" in the cellular energy factory. It not only participates in energy production but also regulates redox balance and the aging process. In recent years, scientists have discovered its significant potential in the anti-aging field.
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The mTOR pathway acts as the cell's "master regulator," controlling cell growth, metabolism, and autophagy. Overactive mTOR signaling accelerates aging and neurodegeneration, while inhibiting mTOR may delay aging and enhance brain function.
The study published by the Sun Yat-sen University team in Pharmaceuticals in July 2025 found that AKG can precisely modulate mTOR signaling, acting like a "key" to unlock neuroprotective mechanisms, offering a new perspective for combating brain aging.
The key findings of this research have been summarized below. Let's explore the benefits of AKG for brain health!
3,Mouse Study Reveals: AKG "Reverses" Brain Aging
Using a D-galactose-induced aging mouse model, the research team demonstrated significant effects of AKG in the following areas:
Rescues Memory and Motor Ability: Aged mice treated with AKG navigated mazes faster, showed better coordination in rotarod tests, and the effects were dose-dependent. (Figure 1)
Repairs Oxidative Damage: AKG acted like an "antioxidant guardian," boosting the activity of SOD and glutathione in the brain and clearing harmful lipid peroxidation products like MDA. (Figure 2)
Restarts the Mitochondrial "Powerhouse": AKG restored mitochondrial membrane potential, bringing cellular energy production back to a youthful state. (Figure 3)
The part 2 will introduce the mechanism by which AKG protects neurons and delays brain aging.
