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Related Concept Videos

Probiotics01:22

Probiotics

244
Probiotics are live, non-pathogenic microorganisms that confer health benefits by modulating the gut microbiota. The human gastrointestinal tract harbors a complex microbial ecosystem, and the balance of this microbiota is crucial for digestive and systemic health. Among the most extensively studied and utilized probiotics are species formerly classified within the genera Lactobacillus and Bifidobacterium. These organisms not only naturally colonize the human gut but are also consumed through...
244
Functions of the Gut Microbiota01:18

Functions of the Gut Microbiota

111
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...
111
Development of Human Microbiota01:30

Development of Human Microbiota

53
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...
53
Introduction to the Human Microbiota01:22

Introduction to the Human Microbiota

128
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,...
128
Gut-Brain Axis01:22

Gut-Brain Axis

164
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...
164
The Oral Microbiota01:27

The Oral Microbiota

61
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...
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Related Experiment Video

Updated: Apr 19, 2026

An In Vitro Batch-culture Model to Estimate the Effects of Interventional Regimens on Human Fecal Microbiota
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IBD: microbiota manipulation through diet and modified bacteria.

Hannah L Simpson1, Barry J Campbell, Jonathan M Rhodes

  • 1Department of Gastroenterology, Institute of Translational Medicine, University of Liverpool, Liverpool, UK.

Digestive Diseases (Basel, Switzerland)
|December 23, 2014
PubMed
Summary
This summary is machine-generated.

Altering the gut microbiota shows promise for treating Crohn's disease (CD) and ulcerative colitis (UC). Therapies like prebiotics and modified bacteria could offer new treatments for these inflammatory bowel diseases.

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Area of Science:

  • Gastroenterology
  • Microbiology
  • Immunology

Background:

  • Crohn's disease (CD) and ulcerative colitis (UC) are characterized by an altered intestinal microbiota.
  • Genetic associations suggest defects in the mucosal barrier and innate immune responses to bacteria in CD and UC.

Purpose of the Study:

  • To review therapeutic strategies targeting the intestinal microbiota in CD and UC.
  • To assess the potential of dietary modifications and genetically modified bacteria for treating CD and UC.

Main Methods:

  • A MEDLINE search was conducted using terms related to prebiotics, genetically modified bacteria, mucosal barriers, and inflammatory bowel diseases.
  • The review synthesized data from in vitro, animal, and clinical studies.

Main Results:

  • In vitro and animal studies show promise for microbiota-targeted therapies, including prebiotics, contrabiotics, phosphatidylcholine, genetically modified bacteria (expressing IL-10 or protease inhibitors), and Vitamin D.
  • Clinical trials indicate benefits of phosphatidylcholine in UC and Vitamin D in CD.

Conclusions:

  • Strategies targeting the microbiota and host defense mechanisms are promising therapeutic avenues for CD and UC.
  • Further investment in these microbiota-focused therapies is warranted.