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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.


Article
Ki-67(MIB-1) and Progesterone Receptor in Meningioma An Immunohistochemical Study

Author: Wahda Mohammed Taib Al- Nuaimy
Journal: Iraqi Academic Scientific Journal المجلة العراقية للاختصاصات الطبية ISSN: 16088360 Year: 2012 Volume: 11 Issue: 2 Pages: 157-167
Publisher: The Iraqi Borad for Medical Specialization المجلس العراقي للاختصاصات الطبية

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Abstract

ABSTRACT:BACKGROUND: In meningioma the tumor grade, subtype, and extent of surgical resection are strong prognostic factors, the growth of this tumor is still unpredictable, and additional prognostic markers are needed. Many studies have shown that the detection of the proliferative potential of meningioma by Ki-67 (MIB-1) and the detection of the progesterone receptor might predict the natural history of tumor and patient survival. OBJECTIVE: To evaluate the proliferative fraction Ki-67 (MIB-1) and progesterone receptor in meningioma, To correlate the expression of these two markers with various clinico- pathological parameters, To compare these results with other studies . PATIENTS AND METHODS: This is a prospective study, in which 50 cases of meningioma were collected in Nineveh province. These cases were examined immunohistochemically. The results of these two markers were correlated with various clinico- pathological parameters. RESULTS: The mean age of all cases was 46 years. There were 16 male and 34 female patients. According to the W.H.O 2000 classification, there were 84% grade I, 10% were grade II and 6 %were grade III. Only 14% of the patients had a history of recurrence. Progesterone receptor was positive in 72% of all cases. Significant relation was observed between the progesterone receptor and the patients age .It was significantly higher in female than male. A significant relationship was found between progesterone receptor with grade and histological types. Thirty three out of 43 cases without recurrence had positive progesterone receptor. The mean±Standard deviation (SD) of Ki-67 Labeling Index (Ki-67 LI) was 2.7±4.2%. No significant relation was found between the Ki-67 LI and patients age. The male patients had a higher Ki-67 LI than that of the female. Significant relation was found between Ki-67 LI and the grade of meningioma . The mean of Ki-67 LI in the recurrent cases was higher than in non recurrent cases. An inverse relationship was found between Ki-67 LI and progesterone receptor . CONCLUSION: Progesterone receptor showed a significant relation with the age and histological types. Ki-67 LI had a direct significant association with the grade and the recurrent cases., while inverse relation was observed between the progesterone receptor with the grade and the recurrent cases. An inverse relationship was observed between the progesterone receptor and Ki-67 LI.

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