4,Cell Study Reveals: AKG Protects Neurons
In an H₂O₂-induced neuronal aging model, AKG exhibited multiple protective effects:
Reduces Senescence Markers: AKG decreased the expression of senescence-associated proteins p53/p21, sharply reducing the number of "senescent cells." (Figure 4)
Inhibits Neuroinflammation: AKG significantly reduced the release of pro-inflammatory factors (such as TNF-α, IL-6), acting like a "fire extinguisher" to calm the inflammatory storm within cells. (Figure 4)
Boosts Metabolic Vitality: The NAD⁺/NADH ratio increased, mitochondrial respiratory function enhanced, and neurons regained vitality. (Figure 5)
5,Cell Study Reveals: AKG's Mechanism in Delaying Brain Aging
Through KEGG and GSEA analysis, the research team found that AKG specifically modulates aging-related pathways, particularly the mTOR/p53 signaling and glutathione metabolism. Western blot experiments further confirmed:
- Inhibits mTOR: AKG dose-dependently reduced the phosphorylation levels of mTOR and its substrates.
- Activates Autophagy: Simultaneously, AKG increased the phosphorylation of the key autophagy protein ULK1, helping cells clear "cellular waste."
In short, AKG achieves a dual effect of anti-oxidation and metabolic regulation through "one suppression and one activation" – inhibiting mTOR signaling and activating autophagy.
6,Conclusion: AKG – A New Hope in the Fight Against Brain Aging
Oxidative stress is a "driving force" behind neurodegenerative diseases. AKG, with its dual role as both an antioxidant and a metabolic regulator, offers a novel strategy to combat brain aging. It can not only alleviate oxidative damage but also reduce inflammation and enhance cellular resilience. This research ignites a beacon of hope for developing interventions for neurodegenerative diseases.
7,References
Guan R, Xue Z, et al. (2025). α-Ketoglutarate Attenuates Oxidative Stress-Induced Neuronal Aging via Modulation of the mTOR Pathway. Pharmaceuticals 18, 1080.
