Related Experiment Video
Updated: Aug 6, 2026
07:15
An In Vitro Batch-culture Model to Estimate the Effects of Interventional Regimens on Human Fecal Microbiota
Published on: July 31, 2019
Resistant starch types 2 and 4 induce distinct and reversible changes in the human gut microbiome
Elisa Piperni1,2, Aitor Blanco-Míguez1, Claudia Mengoni1
1Department CIBIO, University of Trento, Trento, Italy.
Microbiology Spectrum
|July 24, 2026
Summary
Different resistant starch (RS) types, RS2 and RS4, uniquely alter gut bacteria and their functions. This research helps personalize dietary fiber interventions for better metabolic health.
Area of Science:
- Microbiome Research
- Nutritional Science
- Metabolic Health
Background:
- Resistant starch (RS), a type of dietary fiber, offers potential benefits for gut microbiome health and host cardiometabolic outcomes.
- However, the specific effects of different RS types on the gut microbiome remain incompletely understood, hindering personalized dietary strategies.
- Interindividual variability in microbiome responses further complicates the application of RS in dietary interventions.
Purpose of the Study:
- To investigate the distinct effects of two resistant starch types (RS2 and RS4) and a control starch on human gut microbiome composition and function.
- To identify specific microbial species and genes that respond to RS2 and RS4 supplementation using shotgun metagenomics.
- To provide a foundation for microbiome-informed personalization of resistant starch-based dietary interventions for improved metabolic health.
Main Methods:
- Secondary analysis of samples from a randomized clinical trial involving dietary supplementation with RS2, RS4, and a digestible starch control.
- Application of shotgun metagenomics to assess changes in gut microbial community composition and functional potential.
- Analysis of microbial strain-level differences in response to resistant starch intake.
Main Results:
- Both RS2 and RS4 induced unique and transient alterations in gut microbial community structure.
- RS2 supplementation enriched specific bacteria like *Ruminococcus bromii* and *Blautia glucerasea*, while RS4 favored *Parabacteroides distasonis* and other species.
- Microbial functional profiling revealed an enhanced capacity for complex carbohydrate utilization, with increased abundance of relevant enzymes and genes.
Conclusions:
- RS2 and RS4 differentially modulate gut microbial ecology and metabolic functions, highlighting the importance of RS type in dietary interventions.
- Identification of specific bacterial strains and genes responding to different RS types enables prediction of individual benefits.
- Findings support the development of precision nutrition strategies using targeted resistant starch supplementation to enhance metabolic health.
Related Concept Videos
01:27Microbiota of the Stomach and Small Intestine
The human gastrointestinal (GI) tract is characterized by distinct physicochemical conditions that shape its microbial communities. Among these, the stomach presents a particularly challenging environment for microbial colonization due to its highly acidic pH, ranging from 1 to 3. This extreme acidity effectively limits microbial density. However, certain acid-tolerant microorganisms are capable of surviving in this niche. Notably, Helicobacter pylori can colonize the gastric mucosa,...
01:27Microbiota of the Large Intestine
The large intestine hosts the most densely populated microbial ecosystem in the human body. This complex community primarily consists of anaerobic bacteria, with Bacillota (formerly Firmicutes) and Bacteroidota (formerly Bacteroidetes) as the predominant groups. The distribution of these microbes varies along different sections of the large intestine, influenced by local environmental factors such as oxygen availability and nutrient composition.The cecum, located at the beginning of the large...
01:21Microbiota Modulation by Antibiotics
Antibiotics have revolutionized modern medicine by saving countless lives from bacterial infections. However, their widespread use has inadvertently harmed the delicate balance of the human gut microbiota. The gut microbiota, a complex community of bacteria, archaea, viruses, and fungi, plays a vital role in regulating metabolism, immune responses, and maintaining intestinal health. Antibiotics, especially broad-spectrum types, disrupt this ecosystem by eradicating both harmful and beneficial...
01:30Development of Human Microbiota
The human microbiota begins developing at birth and undergoes continual change as we age. Infancy marks a critical period of microbial sensitivity, offering a “window of opportunity” during which beneficial microbes help mature the immune system. By age three, children typically develop a more stable and diverse microbial community. Newborns acquire microbes from their immediate environment; vaginal delivery favors maternal vaginal microbes, while cesarean births favor microbes from the skin...
01:18Dysbiosis of the Gut Microbiota
The human gut microbiome includes a diverse array of microbial species, including beneficial commensals and opportunistic pathogens, which interact to support host health. These microbes contribute to essential functions such as nutrient metabolism, immune system modulation, and maintenance of intestinal barrier integrity. However, disruptions to this equilibrium—referred to as dysbiosis—can have widespread physiological consequences.Dysbiosis is often characterized by reduced microbial...
01:18Functions of the Gut Microbiota
The gut microbiota includes trillions of microorganisms that colonize the human gastrointestinal tract, including bacteria, archaea, viruses, and fungi. This complex ecosystem plays a critical role in maintaining intestinal and systemic health. Most of these microbes inhabit the large intestine, establishing a relatively stable and diverse community that contributes to gut homeostasis through various metabolic, immunological, and protective mechanisms.Dominant bacterial phyla, such as...