Vitamin A Reduces Glucocorticoid Activity in Obese Rats
Author Information
Author(s): Sakamuri Vara Prasad SS, Ananthathmakula Prashanth, Veettil Giridharan Nappan, Ayyalasomayajula Vajreswari
Primary Institution: National Institute of Nutrition, Indian Council of Medical Research
Hypothesis
High doses of vitamin A modulate 11β-HSD1 activity in adipose tissue under normal and obese conditions.
Conclusion
Chronic consumption of a vitamin A-enriched diet decreases 11β-HSD1 activity in the liver and visceral fat of obese rats.
Supporting Evidence
- Vitamin A supplementation significantly decreased body weight and visceral fat mass in obese rats.
- Hepatic 11β-HSD1 activity was significantly reduced by vitamin A supplementation in both lean and obese rats.
- C/EBPα levels decreased in the liver of vitamin A-fed obese rats, indicating a potential mechanism for reduced 11β-HSD1 activity.
Takeaway
Feeding obese rats a special diet with vitamin A helps them lose weight and fat by changing how their bodies handle certain hormones.
Methodology
The study involved feeding male WNIN/Ob lean and obese rats a diet with either low or high vitamin A for 20 weeks and measuring 11β-HSD1 activity in their liver and visceral fat.
Limitations
The study was conducted on a specific rat model, which may not fully represent human physiology.
Participant Demographics
Male, 5-month-old WNIN/Ob lean and obese rats.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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