Tier 3 — preclinical

Dietary alpha-ketoglutarate promotes beige adipogenesis and prevents obesity in middle-aged mice

Tian Q, Zhao J, Yang Q, Wang B, Deavila JM, Zhu MJ, Du M
Aging Cell 2020 19(1):e13059

Bibliography

PubMed
PMID 31691468
PubMed Central
PMC6974731
DOI
10.1111/acel.13059
Funding
NIH grants including R01 HD067449 and R21 AG049976 supported the work.
Competing interests
The authors declared no conflict of interest.

Study snapshot

DesignControlled dietary intervention in middle-aged and young C57BL/6 mice.
ModelFemale C57BL/6 mice; primary focus on 10-month-old mice challenged with high-fat diet.
Sample48 mice total across young and middle-aged cohorts; n=6 per diet/treatment group.
Intervention0 or 1% (w/v) AKG in drinking water with control or high-fat diet.
Duration8 weeks.
EndpointsBody weight gain; Fat mass; Glucose tolerance; Adipose tissue browning; Prdm16 promoter methylation; Metabolic rate

What the study showed, in plain terms

This mouse study tested whether restoring AKG in middle age could change adipose biology during high-fat feeding.

In 10-month-old mice, 1% AKG in drinking water reduced high-fat-diet weight gain and fat mass and improved glucose tolerance. The effect was linked to increased beige-adipocyte programming and DNA demethylation at the Prdm16 promoter.

The study supports a metabolic mechanism in mice, but it does not show that Ca-AKG causes weight loss in humans.

Key findings

  • AKG reduced high-fat-diet weight gain and adipose mass in middle-aged mice.
  • Glucose tolerance improved in AKG-supplemented high-fat-diet mice.
  • AKG increased brown/beige adipose markers and Prdm16 promoter demethylation.

What this study can and cannot tell us

  • Mouse study only; no human supplementation arm.
  • The intervention was plain AKG in drinking water, not a commercial Ca-AKG formulation.
  • The effect was strongest in the middle-aged high-fat-diet context and should not be generalized to healthy human weight loss.

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Dr. Khaled Mahmoud, MBBChCritical Care Medicine, Longevity Science & Editorial Direction Dr. Amr Yasser, PhDCardiometabolic, Musculoskeletal, Gut & Bioavailability Dr. Abdulla Mostafa, PhDCellular Senescence, Neurological, Mitochondrial & Brain-Ageing Biology