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Updated: May 28, 2026
05:35
Fecal (micro) RNA Isolation
Published on: October 28, 2020
The fecal bifidobacterial transcriptome of adults: a microarray approach
Eline S Klaassens1, Kaouther Ben-Amor, Aldwin Vriesema
1Laboratory of Microbiology, Wageningen University, Dreijenplein 10, 6703 HB Wageningen, The Netherlands. eline.klaassens@live.com
Gut Microbes
|October 11, 2011
Summary
Bifidobacteria populations in adults dynamically changed species composition after consuming a specific oligosaccharide mix (GFP). Functional analysis revealed significant gene expression changes, primarily in carbohydrate metabolism, supporting their role in utilizing indigestible plant polysaccharides.
Area of Science:
- Microbiology
- Human Gut Microbiome
- Nutritional Science
Background:
- Bifidobacteria are key beneficial bacteria in the adult human gut microbiota.
- Understanding their dynamics and function after dietary intervention is crucial for host health.
- Oligosaccharides are known prebiotics that can modulate gut bacteria.
Purpose of the Study:
- To investigate the dynamic and functional changes in bifidobacteria following ingestion of a specific oligosaccharide mix (GFP).
- To analyze species-specific shifts within the bifidobacterial community.
- To reveal the functional activity and gene expression profile of bifidobacteria in the human gut.
Main Methods:
- Quantitative real-time PCR was used to monitor total bifidobacteria percentages.
- A clone library-based microarray was employed to analyze the bifidobacterial transcriptome.
- RNA from fecal microbial communities was hybridized to the microarray, followed by sequencing of selected clones.
Main Results:
- Total bifidobacteria numbers remained unchanged, but significant species-specific shifts were observed in all individuals.
- Microarray analysis revealed substantial metabolic activity, with 82 genes showing significant expression changes after GFP intake.
- Predominant gene functions involved metabolism of plant carbohydrates, DNA replication, transcription, and transport of various substrates.
Conclusions:
- Bifidobacteria exhibit dynamic species-level changes in response to oligosaccharide consumption.
- These bacteria primarily utilize indigestible plant polysaccharides for energy and cellular component biosynthesis.
- The study provides insights into the functional adaptation of bifidobacteria within the complex gut environment.
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