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Related Concept Videos

Chronic Bowel Disorders: Introduction01:17

Chronic Bowel Disorders: Introduction

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Chronic bowel diseases are a group of long-term conditions affecting the digestive tract, characterized by inflammation and damage to the gut lining. These conditions primarily include irritable bowel syndrome and inflammatory bowel disease.
Irritable Bowel Syndrome (IBS) is a common disorder affecting the gastrointestinal tract. The distinctive feature is recurrent abdominal pain associated with altered bowel movements, manifesting as constipation, diarrhea, or fluctuating between both. The...
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Irritable Bowel Syndrome I: Introduction01:17

Irritable Bowel Syndrome I: Introduction

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Irritable Bowel Syndrome (IBS) is characterized by functional disturbances in the gastrointestinal system, presenting a cluster of symptoms without evident structural or biochemical abnormalities. It primarily affects the large intestine and may cause abdominal pain, bloating, excessive gas, diarrhea, constipation, or both.
IBS is a chronic condition that can persist over a long period or recur frequently.
The pathogenesis of IBS involves a complex interplay of the following factors:
Altered...
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Inflammatory Bowel Disease I: Ulcerative Colitis01:27

Inflammatory Bowel Disease I: Ulcerative Colitis

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Introduction
Inflammatory bowel disease, or IBD, encompasses a group of disorders characterized by chronic inflammation or ulceration of the gastrointestinal tract.
Risk Factors
The exact cause of IBD remains unclear, although it is believed to be due to a mix of genetic, environmental, microbial, and immune factors. Genetic factors are significant in determining susceptibility to IBD, with family history being a critical risk factor. Individuals with a first-degree relative who has IBD are at...
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Inflammatory Bowel Disease II: Crohn's Disease01:30

Inflammatory Bowel Disease II: Crohn's Disease

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Introduction
Inflammatory bowel disease, commonly known as IBD, refers to a collection of disorders that lead to persistent inflammation of the gastrointestinal tract. The two types of IBD are ulcerative colitis, which impacts the colon, and Crohn's disease, which can involve any part of the gastrointestinal segment.
Crohn's disease
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Other Disorders of Digestive System01:30

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The gastrointestinal tract is susceptible to various disorders. If the lower esophageal sphincter is damaged, stomach acid can flow back into the esophagus, causing irritation and inflammation of the lining. This condition is called gastroesophageal reflux disease (known as heartburn) and may cause chest pain and difficulty swallowing. In the stomach, prolonged use of nonsteroidal anti-inflammatory drugs like aspirin, chronic alcohol consumption, bacterial infections such as Helicobacter...
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Anatomy of the Intestines01:23

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Although digestion of proteins, carbohydrates, and lipids may begin in the stomach, it is completed in the intestine. The absorption of nutrients, water, and electrolytes from food and drink also occurs in the intestine. The intestines can be divided into two structurally distinct organs—the small and large intestines.
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Related Experiment Video

Updated: Nov 1, 2025

Microbiota Analysis Using Two-step PCR and Next-generation 16S rRNA Gene Sequencing
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Gut Microbiota and Inflammatory Disorders.

Vamsi Krishna1, Naveen Kumar1, Sugato Banerjee1

  • 1Department of Pharmacology and Toxicology National Institute of Pharmaceutical Education and Research, Kolkata, India.

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Summary
This summary is machine-generated.

Gut microbiota balance is crucial for health. Imbalances, or dysbiosis, can trigger inflammation and autoimmune issues, but beneficial microbes offer therapeutic potential.

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IBDMicrobiotaSLE.arthritisdiabetesfood allergy

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Area of Science:

  • Microbiology
  • Immunology
  • Gastroenterology

Background:

  • The human gut hosts a complex ecosystem of bacteria, fungi, viruses, and archaea, with a near 1:1 ratio of human to bacterial cells.
  • Variations in gut microbiota diversity can lead to dysbiosis, a state linked to numerous pathological conditions.
  • Beneficial gut microbes produce short-chain fatty acids, while Gram-negative bacteria release lipopolysaccharide (LPS), a pro-inflammatory agent.

Purpose of the Study:

  • To explore the molecular mechanisms by which gut bacteria influence inflammatory and autoimmune disorders.
  • To review the role of gut microbiota and their products in immunomodulation and inflammation.
  • To discuss the potential of prebiotics and probiotics as therapeutic strategies.

Main Methods:

  • Literature review focusing on molecular mechanisms of gut microbiota in inflammation.
  • Analysis of the role of microbial products like LPS in immune responses.
  • Examination of the immunomodulatory effects of beneficial gut bacteria and their metabolites.

Main Results:

  • Gut microbiota composition significantly impacts host immunity and inflammation.
  • Microbial metabolites (e.g., short-chain fatty acids) and products (e.g., LPS) play key roles in modulating immune responses.
  • Dysbiosis is associated with increased inflammation and the development of autoimmune diseases.

Conclusions:

  • Gut bacteria are pivotal in regulating inflammatory and autoimmune disorders.
  • Targeting gut microbiota through prebiotics and probiotics shows promise for therapeutic interventions.
  • Understanding these molecular mechanisms is essential for developing novel treatments for immune-mediated diseases.