Pathophysiology of Peptic Ulcer

Topics: Stomach, Helicobacter pylori, Peptic ulcer Pages: 3 (324 words) Published: May 17, 2013


Peptic ulcer disease is an excavation (hollowed-out area) that forms in the mucosal wall of the stomach. Erosion of a circumscribed area of mucous membrane is the cause.

Predisposing Factors Precipitating Factors

➢ Age (40-60) > Malignant tumors ➢ Gender > Gastric Hyperacidity ➢ Lifestyle (Alcohol ingestion) > Stress ➢ Familial tendency > Irritating Foods

PS:::::::: please edit the factors!!!!

Helicobacter Pylori causes:

-H. pylori evades attack by the host immune system and causes chronic, indolent inflammation by several mechanisms. 

-H. pylori can damage the mucosal defense system by reducing the thickness of the mucus gel layer, diminishing mucosal blood flow, and interacting with the gastric epithelium throughout all stages of the infection. 

-H. pylori infection can also increase gastric acid secretion; by producing various antigens, virulence factors, and soluble mediators,

-H. pylori induces inflammation, which increases parietal-cell mass and, therefore, the capacity to secrete acid.

-The H. pylori cytotoxin-associated geneCagA also has an important role: it interferes with gastric epithelial cell-signaling pathways, thereby regulating cellular responses and possibly contributing to apical junction barrier disruption, interleukin-8 secretion and phenotypic changes to gastric epithelial cells.

Use of NSAID’s result to:

-The injurious gastrointestinal effects of NSAIDs are largely...
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