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Related Concept Videos

Treating Helicobacter pylori in Peptic Ulcers: Antimicrobial Therapy01:16

Treating Helicobacter pylori in Peptic Ulcers: Antimicrobial Therapy

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Helicobacter pylori, a resilient gram-negative bacterium, can thrive in the stomach's harsh, acidic environment. Infection with H. pylori leads to a cascade of events within the stomach lining. One of the critical disruptions caused by this bacterium is the interference with somatostatin production, a hormone responsible for regulating acid secretion. This interference tips the balance, escalating acid secretion and diminishing bicarbonate levels. This imbalance compromises the defensive...
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Pathophysiology of Peptic Ulcer Disease: Injurious Factors01:22

Pathophysiology of Peptic Ulcer Disease: Injurious Factors

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Peptic ulcers are sores on the stomach's inner lining and the upper small intestine, which are the result of disruptions in the mucosal layer that houses parietal cells which produce gastric acid, and chief cells which secrete pepsinogen.
In the antrum region, G cells secrete the gastrin hormone that binds to gastrin-cholecystokinin-B (CCK2) receptors on parietal and enterochromaffin-like (ECL) cells in the fundic glands. Simultaneously, the vagus nerve releases acetylcholine, which binds...
835
Peptic Ulcer Disease III: Clinical Manifestations and Diagnostic Studies01:28

Peptic Ulcer Disease III: Clinical Manifestations and Diagnostic Studies

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Peptic ulcer disease (PUD) presents with diverse symptoms depending on the location and severity of the ulcer. Clinical manifestations of peptic ulcer include dull pain and a burning sensation in the mid-epigastric region.
Few clinical manifestations differentiate gastric ulcers from duodenal ulcers. Distinctions in the location, timing, and pain relief are crucial for healthcare providers in differentiating between gastric and duodenal ulcers during clinical assessments.
282
Peptic Ulcer Disease I: Introduction01:30

Peptic Ulcer Disease I: Introduction

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Peptic Ulcer Disease (PUD) is characterized by mucosal excavation in the esophagus, stomach, pylorus, or duodenum. It can manifest as acute or chronic based on the extent and duration of mucosal involvement.
An acute ulcer, marked by superficial erosion and minimal inflammation, swiftly resolves upon identifying and addressing the underlying cause. In contrast, a chronic ulcer persists, potentially eroding through the muscular wall and forming fibrous tissue.
Peptic ulcers can also be...
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Gastritis-II: Pathophysiology01:17

Gastritis-II: Pathophysiology

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Gastritis is marked by disruption of the mucosal barrier that usually protects the stomach tissue from digestive juices and manifests in acute and chronic forms.
In acute gastritis, the gastric mucosa becomes swollen and red and undergoes superficial erosion. Superficial ulceration may lead to bleeding.
In chronic gastritis, persistent or repeated insults lead to chronic inflammatory changes and, eventually, thinning or atrophy of the gastric tissue.
Gastritis can stem from various causes, each...
785
Pathophysiology of Peptic Ulcer Disease: Mucosal Defense Factors01:24

Pathophysiology of Peptic Ulcer Disease: Mucosal Defense Factors

749
Peptic ulcer disease, commonly called PUD, represents a multifaceted condition characterized by disruptions in the lining of the gastrointestinal (GI)  tract. Central to the protection of the gastrointestinal lining is the mucosal-bicarbonate barrier. This physiological defense mechanism is a formidable shield against the corrosive effects of gastric acid and pepsin secretion in the stomach. Its role is pivotal in maintaining the structural integrity of the stomach's inner lining.
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Related Experiment Video

Updated: Nov 4, 2025

Retinal and Choroidal Thickness Changes in Populations with Helicobacter pylori Infection by Swept-Source Optical Coherence Tomography
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Retinal and Choroidal Thickness Changes in Populations with Helicobacter pylori Infection by Swept-Source Optical Coherence Tomography

Published on: November 1, 2024

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Helicobacter pylori Infection.

Jaehoon Cho1, Akriti Prashar2, Nicola L Jones3

  • 1Division of Gastroenterology, Brown University, 593 Eddy Street, POB 240, Providence, RI 02903, USA.

Gastroenterology Clinics of North America
|May 24, 2021
PubMed
Summary
This summary is machine-generated.

Helicobacter pylori (H pylori) infection is a global health issue linked to stomach cancer and ulcers. This review covers its effects on cells, immune evasion, and challenges in treatment due to antibiotic resistance.

Keywords:
Antibiotic resistanceDiagnosisGastric cancerHelicobacter pyloriMicrobial pathogenesisPeptic ulcer

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Area of Science:

  • Microbiology
  • Pathogenesis
  • Immunology

Background:

  • Helicobacter pylori is a widespread bacterium causing significant gastric diseases.
  • Infections lead to peptic ulcers and gastric malignancies worldwide.
  • Increasing antibiotic resistance complicates treatment strategies.

Purpose of the Study:

  • To summarize the microbiology and pathogenesis of H pylori.
  • To detail the bacterium's effects on gastric epithelial cells and immune evasion.
  • To discuss diagnostic approaches and evolving treatment options.

Main Methods:

  • Literature review of H pylori microbiology and pathogenesis.
  • Analysis of H pylori's impact on gastric stem and progenitor cells.
  • Review of diagnostic modalities and treatment strategies.

Main Results:

  • H pylori exhibits complex effects on gastric epithelial cells.
  • The bacterium employs sophisticated mechanisms to evade host immune responses.
  • Antibiotic resistance poses a significant challenge to effective eradication.

Conclusions:

  • Understanding H pylori's multifaceted interactions is crucial.
  • Appropriate diagnostics and tailored treatments, including susceptibility testing, are vital.
  • Managing H pylori infection requires addressing antibiotic resistance and complex pathogenesis.