Related Experiment Video
Updated: Mar 27, 2026

11:22
Microbiota Analysis Using Two-step PCR and Next-generation 16S rRNA Gene Sequencing
Published on: October 15, 2019
31.5K
Has provoking microbiota aggression driven the obesity epidemic?
Benoit Chassaing1, Andrew T Gewirtz1
1Center for Inflammation, Immunity and Infection, Institute for Biomedical Sciences, Georgia State University, Atlanta, GA, USA.
Summary
The gut microbiome may drive obesity through aggressive bacteria that trigger inflammation. Societal factors like antibiotics and food additives might provoke this aggression, increasing obesity rates.
Area of Science:
- Microbiology
- Immunology
- Metabolic disease research
Background:
- Gut microbiome alterations are linked to obesity and related diseases.
- Mechanisms driving these changes are not well understood.
- Inflammation plays a role in metabolic dysfunction.
Purpose of the Study:
- To review the role of the gut microbiome in obesity.
- To hypothesize mechanisms linking microbiota to metabolic disease.
- To explore societal factors influencing microbiota aggression.
Main Methods:
- Literature review of gut microbiome and obesity studies.
- Hypothesis formulation based on existing evidence.
- Analysis of potential societal influences on the gut microbiome.
Main Results:
- A hypothesis is proposed: aggressive microbiota components activate host pro-inflammatory genes, driving metabolic disease.
- Societal changes, including antibiotic use and food additives, are hypothesized to provoke microbiota aggression.
- This aggression may contribute to rising obesity and associated disease incidence.
Conclusions:
- The gut microbiome's role in obesity is complex and involves host-microbe interactions.
- Microbiota aggression, potentially driven by modern societal factors, is a plausible mechanism for obesity development.
- Further research is needed to validate these hypotheses and explore therapeutic interventions.
More Related Videos
Related Concept Videos
Introduction to the Human Microbiota
46
Microorganisms colonize various regions of the human body, including the mouth, nasal passages, throat, stomach, intestines, urogenital tract, and skin. The total number of microbial cells is estimated to range from 10¹³ to 10¹⁴—comparable to, or exceeding, the number of human somatic cells. This host–microbiome relationship has led to the conceptualization of humans as supraorganisms, wherein microbial communities perform vital roles in development, immunity,...
46
The Oral Microbiota
35
The oral microbiome includes a complex ecosystem comprising over 700 microbial species, identified through genomic sequencing and culture-based analyses to date. This community includes a core microbiome, found universally among individuals, and a variable component influenced by environmental factors such as diet, lifestyle, and host genetics. Site-specific conditions, including oxygen gradients, pH levels, and nutrient availability, determine the spatial distribution of these microorganisms...
35
Gut-Brain Axis
51
The gut–brain axis is a bidirectional communication system that connects the gastrointestinal tract and the brain. This interaction is mediated through multiple pathways, including the vagus nerve, hormonal signals, immune responses, and chemical messengers produced by gut microbes.Microbial Contributions to Brain FunctionGut microbiota contributes significantly to brain function by producing neuroactive compounds. These include neuroactive compounds that influence neurotransmitters such...
51
Development of Human Microbiota
21
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...
21
Microbiota of the Large Intestine
16
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...
16
Functions of the Gut Microbiota
29
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...
29

