Related Experiment Video

Updated: Jul 9, 2026

Cefoperazone-treated Mouse Model of Clinically-relevant Clostridium difficile Strain R20291
06:51

Cefoperazone-treated Mouse Model of Clinically-relevant Clostridium difficile Strain R20291

Published on: December 10, 2016

12.7K

Epsilon toxin-producing Clostridium perfringens colonize the multiple sclerosis gut microbiome overcoming CNS immune

Yinghua Ma1, David Sannino1, Jennifer R Linden1

  • 1Feil Family Brain and Mind Research Institute.

The Journal of Clinical Investigation
|February 28, 2023
PubMed

Insights

Certain Clostridium perfringens strains producing epsilon toxin (ETX) are more abundant in the gut microbiomes of multiple sclerosis (MS) patients. ETX triggers demyelination in the central nervous system, suggesting a potential environmental trigger for MS.

Area of Science:

  • Neuroimmunology
  • Microbiome research
  • Infectious disease

Background:

  • Multiple sclerosis (MS) is a complex central nervous system (CNS) disease with an unknown environmental trigger.
  • Gut dysbiosis is frequently observed in MS patients, but specific causative agents remain unidentified.

Purpose of the Study:

  • To investigate the role of specific gut microbial species as potential environmental triggers for MS.
  • To identify causative species linked to gut dysbiosis in MS patients.

Main Methods:

  • Quantitative PCR was used to detect and quantify epsilon toxin-producing (ETX) strains of Clostridium perfringens in the gut microbiomes of MS patients and healthy controls (HCs).
  • Functional analysis of ETX production and genetic characteristics of C. perfringens isolates.
  • Experimental autoimmune encephalomyelitis (EAE) models were used to assess the neuroinflammatory and demyelinating potential of ETX, comparing its effects to pertussis toxin (PTX).
  • Transcriptional profiling of CNS endothelial cells was performed to identify ETX-induced host responses.

Main Results:

  • Individuals with MS showed a higher prevalence and abundance of ETX-producing C. perfringens strains compared to HCs.
  • Isolates from MS patients produced functional ETX and possessed highly conjugative plasmids.
  • ETX administration in EAE models induced demyelination across multiple CNS regions (corpus callosum, thalamus, cerebellum, brainstem, spinal cord), mirroring MS lesion distribution.
  • ETX-induced EAE demonstrated inflammatory pathways associated with overcoming CNS immune privilege, similar to PTX-induced EAE but with distinct lesion localization.

Conclusions:

  • ETX-producing C. perfringens strains are biologically plausible pathogens in MS.
  • ETX may act as an environmental trigger, inducing inflammatory demyelination in the CNS.
  • These findings highlight the potential role of specific gut bacteria and their toxins in the pathogenesis of MS.
Keywords:
AutoimmunityDemyelinating disordersMicrobiologyMultiple sclerosisToxins/drugs/xenobiotics

More Related Videos

Injections of Lipopolysaccharide into Mice to Mimic Entrance of Microbial-derived Products After Intestinal Barrier Breach08:24

Injections of Lipopolysaccharide into Mice to Mimic Entrance of Microbial-derived Products After Intestinal Barrier Breach

Published on: May 2, 2018

19.7K
Microbiota Analysis Using Two-step PCR and Next-generation 16S rRNA Gene Sequencing11:22

Microbiota Analysis Using Two-step PCR and Next-generation 16S rRNA Gene Sequencing

Published on: October 15, 2019

28.7K

Related Concept Videos

Microbiota of the Large Intestine01:27

Microbiota 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...
Functions of the Gut Microbiota01:18

Functions 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...
Dysbiosis of the Gut Microbiota01:18

Dysbiosis 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...
Gut-Brain Axis01:22

Gut-Brain Axis

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 as...
Bacterial Toxins01:12

Bacterial Toxins

Bacterial toxins are sophisticated virulence factors that enable pathogenic bacteria to interact with, invade, and damage host tissues. These toxins fall broadly into two types: protein exotoxins, which are secreted into the environment and target specific host receptors, and lipopolysaccharide endotoxins, which are structural components of the bacterial outer membrane released primarily during bacterial lysis or membrane shedding. Exotoxins generally act more selectively, binding to cell...
Inflammatory Bowel Disease III: Crohn's Disease01:25

Inflammatory Bowel Disease III: Crohn's Disease

Crohn’s disease is a chronic, relapsing form of inflammatory bowel disease characterized by segmental, transmural inflammation that can affect any part of the gastrointestinal tract. Its pathogenesis arises from a combination of genetic susceptibility, environmental exposures, epithelial barrier dysfunction, and immune dysregulation. Together, these factors lead to an exaggerated immune response against components of the gut microbiome.Genetic and Environmental InfluencesMultiple genetic...