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Intestinal microflora and obesity in rats
S Mozes1, D Bujnáková, Z Sefcíková
1Institute of Animal Physiology, Slovak Academy of Sciences, 040 01 Kosice, Slovakia. mozes@saske.sk
Folia Microbiologica
|July 29, 2008
Summary
Early nutrition impacts gut microbes and small intestine function, predisposing rats to obesity. Nutritional experiences influence body weight, fat, and food intake, highlighting a link to obesity development.
Area of Science:
- Nutritional Science
- Microbiology
- Physiology
Background:
- Early life nutrition is crucial for long-term health.
- The gut microbiome and small intestine function play roles in metabolic health.
- Understanding early life influences on obesity is critical.
Purpose of the Study:
- To investigate the relationship between early nutrition, gut microflora, and small intestine function.
- To determine how early nutritional experiences predispose Sprague-Dawley rats to obesity.
- To explore the impact of litter size on postnatal development and metabolic outcomes.
Main Methods:
- Male Sprague-Dawley rats were assigned to small litters (SL) or normal litters (NL) from birth to weaning (30 days).
- Diet was standardized from day 30 to 40.
- Body mass, adiposity, food intake, jejunal enzyme activity, and gut microbial composition (Bacteroides, Enterococci, Lactobacilli) were analyzed.
Main Results:
- Postnatal overfeeding (SL) resulted in heavier rats with increased adiposity, body mass gain, and food intake compared to normal litter (NL) rats.
- SL rats showed significantly higher jejunal alkaline phosphatase and maltase activity.
- Gut microbiota differed significantly: decreased Bacteroides and increased Enterococci and Lactobacilli in SL rats, correlating with obesity parameters.
Conclusions:
- Early nutritional experiences significantly influence small intestine function and gut microbial community development.
- Altered gut microbiota and digestive function resulting from early nutrition can contribute to obesity development and maintenance.
- Postnatal nutrition acts as a predisposing factor for obesity through its effects on the developing gut.
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