Calcium 2-Oxoglutarate TCA Cycle Intermediate: Accelerates ATP Resynthesis and Lactate Clearance in Sports Nutrition Applications

Introduction to Calcium α-Ketoglutarate

Chemical Properties

• Chemical Name: Calcium α-Ketoglutarate
• Molecular Formula: C₅H₄CaO₅·nH₂O (where n represents the number of crystallization waters, commonly one hydrate)
• CAS Number: 71686-01-6
• Appearance: White to off-white crystalline powder, odorless, slightly bitter taste.
• Solubility: Readily soluble in water, with the aqueous solution being acidic.
• Stability: Stable under dry conditions; requires protection from light and sealed storage.

Biological Sources and Metabolism

• Natural Occurrence: Present in small amounts in mammalian tissues as an intermediate in the tricarboxylic acid (TCA) cycle.
• Synthetic Metabolism: Formed by the combination of α-ketoglutarate with calcium ions or by the deamination of glutamate followed by calcium binding.
• Functional Role: Acts as a key intermediate in energy metabolism, participating in the synthesis of amino acids, fatty acids, and nucleic acids.

Application Fields

1. 1.Pharmaceutical and Health Fields
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   • Anti-Aging and Lifespan Extension
     Animal studies have shown that supplementation with calcium α-ketoglutarate can extend the lifespan of model organisms such as nematodes and mice, reducing the incidence of age-related diseases.
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     Mechanism of Action: Regulates epigenetic modifications (e.g., DNA methylation), inhibits inflammatory factors (e.g., TNF-α, IL-6), and enhances the antioxidant defense system (e.g., SOD, GSH-Px).
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   • Treatment of Metabolic Diseases
     • Diabetes: Assists in promoting insulin sensitivity and inhibiting gluconeogenesis.
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     • Cardiovascular Protection: Reduces the risk of hypertension and atherosclerosis.
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     • Liver Disease: Decreases oxidative damage to hepatocytes and promotes liver regeneration.
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   • Neuroprotection
   • Improves cognitive function in neurodegenerative diseases such as Alzheimer's and Parkinson's.
     Mechanism of Action: Enhances neuronal energy metabolism and reduces β-amyloid deposition.
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2. 2.Nutritional Supplements
   • Sports Nutrition
     Promotes muscle protein synthesis, reduces post-exercise muscle damage, and enhances endurance.
     Commonly found in fitness supplements, often combined with arginine and citrulline.
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   • Clinical Nutrition
     Used for postoperative recovery, burn patients, and the elderly to accelerate wound healing and improve nutritional status.
     Enhances immune function and reduces the risk of infection.
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3. 3.Feed Additives
   • Livestock Farming
     Increases the growth rate of livestock and poultry, improving meat quality (e.g., increased lean meat ratio, reduced fat deposition).
     Enhances animal stress resistance and reduces disease incidence.
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   • Aquaculture
     Promotes the growth of fish and shrimp, improving survival rates.
     Enhances the body color and meat flavor of aquatic animals.
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4. 4.Cosmetics and Personal Care
   • Skin Care
     Inhibits tyrosinase activity, reducing melanin production and providing whitening effects.
     Offers antioxidant and anti-inflammatory properties, improving signs of skin aging (e.g., wrinkles, sagging).
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   • Hair Care
     Promotes scalp blood circulation, enhances follicle nutrition, and reduces hair loss.
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5. 5.Industrial and Scientific Research
   • Biotechnology
     Used as a component in cell culture media to support the growth of high-energy-demanding cells such as stem cells and neurons.
   • Food Industry
     Acts as an acidity regulator and flavor enhancer, extending the shelf life of food products.
   • Agriculture
     Functions as a plant growth regulator, promoting seed germination and root development.

Summary of Mechanisms of Action

• Energy Metabolism: Acts as a key intermediate in the TCA cycle, directly participating in ATP production.
• Amino Acid Metabolism: Promotes the synthesis of amino acids such as glutamate and proline, supporting protein and collagen formation.
• Antioxidant Defense: Enhances glutathione (GSH) levels, clears free radicals, and reduces oxidative stress.
• Signal Transduction: Regulates signaling pathways such as mTOR and AMPK, influencing cell growth, differentiation, and apoptosis.