Document Detail


Quality of gastric ulcer healing: a new, emerging concept.
MedLine Citation:
PMID:  1719066     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Assessment of gastric ulcer healing is usually based on a visual examination (by endoscopy in patients, or the evaluation of ulcer size in experimental studies), and not on histologic and ultrastructural assessment of subepithelial mucosal healing. This approach has led to the assumption that the mucosa of grossly "healed" gastric and/or duodenal ulcers returns to normal, either spontaneously or following treatment. However, the re-epithelialized mucosa of grossly "healed" experimental gastric ulcer has recently been found to have prominent histologic and ultrastructural abnormalities, including reduced height, marked dilation of gastric glands, poor differentiation and/or degenerative changes in glandular cells, increased connective tissue, and disorganized microvascular network. It has been postulated that these residual abnormalities might interfere with mucosal defense and may be the basis of ulcer recurrence. In the present article, the ulcer healing process and the role of luminal factors, transitional zone at the ulcer margin, and granulation tissue are discussed. The healing of an ulcer is accomplished by filling of the mucosal defect with epithelial cells and connective tissue to reconstruct mucosal architecture. Under influence of growth factors [predominantly epidermal growth factor (EGF) and transforming growth factor (TGF alpha)], the epithelial cells at the ulcer margin dedifferentiate and proliferate, supplying cells for re-epithelialization of the mucosal scar surface and reconstruction of glandular structures. Granulation tissue at the ulcer base supplies connective tissue cells to restore the lamina propria and endothelial cells and microvessels for mucosal microvasculature reconstruction. The final outcome of healing reflects a dynamic interaction between an "epithelial" component from the ulcer margin and a connective tissue component including microvessels originating from granulation tissue.(ABSTRACT TRUNCATED AT 250 WORDS)
Authors:
A Tarnawski; J Stachura; W J Krause; T G Douglass; H Gergely
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of clinical gastroenterology     Volume:  13 Suppl 1     ISSN:  0192-0790     ISO Abbreviation:  J. Clin. Gastroenterol.     Publication Date:  1991  
Date Detail:
Created Date:  1991-11-29     Completed Date:  1991-11-29     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  7910017     Medline TA:  J Clin Gastroenterol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  S42-7     Citation Subset:  IM    
Affiliation:
Gastroenterology Section, DVA Medical Center, Long Beach, CA 90822.
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MeSH Terms
Descriptor/Qualifier:
Animals
Cell Movement
Disease Models, Animal
Gastric Mucosa / pathology,  physiopathology*
Granulation Tissue / growth & development
Neovascularization, Pathologic
Rats
Stomach Ulcer / pathology,  physiopathology*
Wound Healing*

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