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Bcl-2 Expression in CagA Strain H. Pylori Gastritis (Immunohistochemical and Insitu Hybridization Study)

Author: Hussam Hasson Ali
Journal: Iraqi Academic Scientific Journal المجلة العراقية للاختصاصات الطبية ISSN: 16088360 Year: 2012 Volume: 11 Issue: 1 Pages: 71-75
Publisher: The Iraqi Borad for Medical Specialization المجلس العراقي للاختصاصات الطبية

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Abstract

ABSTRACT:BACKGROUND:Carriage of Helicobacter Pylori in the human stomach is associated with increased risk of peptic ulcerdisease, distal gastric adenocarcinoma and gastric B-cell mucosa associated lymphoid tissue lymphoma.OBJECTIVE:To study the immunohistochemical expression of bcl-2, as apoptosis makers in the gastric mucosa ofpatients infected with cagA Helicobacter Pylori demonstrated by insitu hybridization method.PATIENTS MATERIALS AND METHODS:Gastric antrum biopsies from 99 patients presented with dyspeptic symptoms (50 men, 49 women,median age 40) were analysed for the presence of H. pylori, and were classified according to updatedSydney system. Insitu hybridization technique was done to detect cagA H. pylori.Immunohistochemical expression of bcl-2 using (Avidin- Biotin method) was performed on paraffinembedded biopsy specimens.RESULTS:Forty four patients (44.44%) had H. pylori cagA positive starin. Atrophy of gastric mucosa was presentin 14 (14.14 %) patients. Intestinal metaplasia was present in 8 (8.08%) patients. The frequency ofatrophy and intestinal metaplasia were significantly higher in cagA H. pylori gastritis than non-cagA H.pylori gastritis (p=0.023 and 0.041respectively). Bcl2 expression was not significantly higher in H.pylori gastritis than non-H. pylori gastritis (p= 0.101). Bcl2 expression was significantly higher in thepresence of atrophy (p<0.001). Bcl2 expression was significantly higher in the presence of intestinalmetaplasia (p<0.001).CONCLUSION:The rate of apoptosis decreases when lesions (gastric atrophy and intestinal metaplasia) are present.


Article
PCNA EXPRESSION IN CAGA STRAIN H. PYLORI GASTRITIS: IMMUNOHISTOCHEMICAL AND INSITU HYBRIDIZATION STUDY

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Abstract

Background: Carriage of Helicobacter Pylori (H. Pylori) in the human stomach is associated with increased risk of peptic ulcer disease, distal gastric adenocarcinoma and gastric B-cell mucosa associated lymphoid tissue lymphoma. Several studies have shown increased evidence of increased cell proliferation in the gastric mucosa both in human carrying H. Pylori, and animal model of H. Pylori infection.Objective: To study the immunohistochemical expression of Proliferating cell nuclear antigen (PCNA), as a proliferative marker in the gastric mucosa of patients infected with CagA Helicobacter Pylori demonstrated by insitu hybridization method.Methods: Gastric antrum and corpus biopsies from 99 patients with dyspeptic symptoms (50 men, 49 women, and median age 40) were analyzed for H. pylori, presence of chronic inflammation, intestinal metaplasia, and atrophy according to updated Sydney system. Insitu hybridization technique was done to detect cagA H. pylori. Immunostaining for PCNA (Avidin- Biotin method) was performed on paraffin embedded tissue specimens.Results: Forty four patients (44.44%) had H. Pylori cagA positive strain. Atrophy of gastric mucosa was present in 14 (14.14 %) patients. Intestinal metaplasia was present in 8 (8.08%) patients. The frequency of atrophy was significantly higher in cagA H. Pylori gastritis than non-cagA H. Pylori gastritis (p=0.041). The frequency of intestinal metaplasia was significantly higher in cagA H. Pylori gastritis than non-cagA H. Pylori gastritis (p=0.023). PCNA labeling index (LI) of the gastric glands was significantly higher in presence of atrophic alterations (p <0.001), intestinal metaplasia (p <0.001) and in cagA strain H. Pylori positive gastritis (p<0.001).Conclusion: The rates of gastric glandular atrophy, intestinal metaplasia, and epithelial proliferation increase in the presence of H. Pylori infection, and are further increased when H. Pylori is of cag A strain.Key words: cag A H. pylori gastritis, PCNA immunohistochemical expression.

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