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Dietary Proteins Rapidly Altered the Microbial Composition in Rat Caecum
Fan Zhao1, Zixin Huang1, Guanghong Zhou1
1Key Laboratory of Meat Processing and Quality Control, MOE, Key Laboratory of Meat Processing, MOA, Jiangsu Synergetic Innovation Center of Meat Production and Processing, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China.
Current Microbiology
|August 24, 2017
Summary
Dietary proteins significantly alter gut bacteria composition, with red and white meat proteins showing distinct effects early on. Soy protein also uniquely shifted gut microbes over time.
Area of Science:
- Microbiology
- Nutrition Science
- Gastroenterology
Background:
- Dietary proteins are known to influence gut microbial diversity.
- Limited information exists on the rapid gut bacterial response to specific dietary proteins during short-term feeding.
Purpose of the Study:
- To investigate the impact of different dietary proteins on gut microbial composition in rats over short-term feeding periods.
- To compare the effects of various protein sources, including soy, red meat, white meat, and casein, on gut bacteria.
Main Methods:
- Utilized Polymerase Chain Reaction-Denaturing Gradient Gel Electrophoresis (PCR-DGGE) to analyze gut microbial composition changes.
- Examined rat cecal samples after 2, 7, and 14 days of feeding with specific protein diets.
- Employed Principle Component Analysis (PCA) to evaluate microbial community structure differences.
Main Results:
- Significant differences in gut microbial composition were observed by day 2, distinguishing between red meat (pork, beef) and white meat (chicken, fish) protein groups.
- Microbial composition within each diet group changed substantially with extended feeding duration.
- Soy protein consumption led to a distinct microbial profile, separating from casein and meat protein groups by days 7 and 14.
Conclusions:
- Dietary protein type rapidly influences gut bacterial composition within days.
- Distinct microbial responses are associated with red versus white meat proteins.
- Soy protein elicits a unique gut microbial signature compared to meat proteins and casein over time.
