Biomedical subjects

F Ezzat

Publications and source records attributed to F Ezzat.

22 records · Page 2Linked to original sources

PubMedDate not supplied

Cellular proliferation and ploidy of the gastric mucosa: the role of Helicobacter pylori.

BACKGROUND/AIMS: Recently, H. pylori has been recognized as a risk factor for gastric adenocarcinoma. As such, we have analyzed the DNA content of gastric epithelial cells in an attempt to reveal the role of H. pylori in gastric carcinogenesis. METHODOLOGY: Fifty-three subjects presented with gastric dyspepsia, 39 males and 14 females, with a mean age of 42.15 (+/- 13.16) years. They were referred to the out-patient clinic to undergo endoscopic examination for the first time. Biopsy specimens from the antrum of each subject were subjected to culture for the presence of H. pylori histologic diagnosis, and DNA flow cytometry for the analysis of cellular proliferation and DNA policy. RESULTS: The endoscopic diagnoses were normal appearance (12), Gastric ulcer (12), duodenal ulcer (29). Thirty-eight (72%) subjects were positive, and 15 (28%) subjects were negative for H. pylori. Abnormal DNA-content (aneuploidy) was found in specimens from the antrums of 3 patients, 2 patients with duodenal ulcers (DU, and one with a gastric ulcer (GU). The cellular proliferation detected by flow cytometry in the form of proliferative index (PI; percentage of cells in the DNA S and G2M phases) was 27.88 (+/- 12.48) and 14.17 (+/-2.94) in the antrums of those positive and negative for H. pylori, respectively. A very significant increase in the PI (p < 0.005) was found between subjects positive and negative for H. pylori. Patients with DU and H pylori infection had the highest PI, and the PI was significantly higher than in patients with DU, but without infection. Regarding histology, there was a significant increase in the PI in the presence of H. pylori infection in either CAG or dysplasia groups as compared to cases without infection in the same groups. CONCLUSION: These results show that H. pylori infection is associated with changes in the DNA-content and cellular proliferative activity, suggesting that H. pylori may be implicated in gastric carcinogenesis. Also, the significant increase in the PI along the progression of severity of the disease suggests that measuring this parameter might allow more accurate monitoring of patients, so that a targeted therapeutic protocol may be defined.

Adult↗

PubMedDate not supplied

Detection of p53 protein overexpression and DNA ploidy analysis in colon cancer.

BACKGROUND/AIMS: This study was designed to demonstrate the accumulation of the mutant p53 protein in human neoplasms. The correlation of flow cytometric DNA ploidy pattern with p53 expression using the immunoblotting technique was also investigated. METHODOLOGY: In this study, the occurrence of p53 overexpression was analyzed in 34 cases of adenocarcinoma of the colon by western immunoblotting technique, using an anti-human p53 monoclonal antibody (Do-7). The nuclear protein extract from human colon tumor specimens was immunoblotted relative to protein standards of known molecular weight. Flow cytometric analysis was used to study the DNA ploidy pattern of the tumor cells. RESULTS: Monoclonal antibody p53-Do 7 detected a single band of 53 KDa in 70.5% (24 of 34) of the tumor specimens examined. Whereas, no bands were detected in the normal colon mucosa. The relation between p53 overexpression and the clinicopathological variable (Dukes' staging) was studied and no significant difference in p53 overexpression between Dukes' stages B and C was found. Flow cytometric analysis revealed a higher incidence of DNA aneuploidy in 75% (15 of 20) of p53 positive cases compared with 64.3% (9 of 14) in the diploid tumors. CONCLUSION: The immunoblotting technique can successfully detect the mutant p53 and is therefore expected to provide valuable information on the role of p53 in the process of carcinogenesis.

Adenocarcinoma↗

PubMedDate not supplied

Endoscopic laser treatment of progressive dysphagia in patients with advanced esophageal carcinoma.

BACKGROUND/AIMS: The present study was designed to evaluate the treatment of malignant dysphagia by laser palliation. METHODOLOGY: Between November 1994 and May 1997, 104 patients with esophageal carcinoma were subjected to endoscopic palliation with Nd-YAG laser. They were 83 men and 21 women with mean age 57+ 6.32 years. The majority of cases (94%) presented with difficulty in swallowing. Patients were treated at one-week intervals until benefit was achieved. RESULTS: A tumor mass was observed in the lower third of the esophagus in 75 (72%) patients. The tumor mean length was 6 cm (range 3-10 cm). Histology revealed that 74 (71%) patients had squamous cell carcinoma and 30 (29%) patients had adenocarcinoma. Hospital mortality occurred in 6 (5.76%) cases because of esophageal perforation, fistula, or pyothorax, and late mortality occurred in 29 (27.9%) patients. Perforation occurred in 5 (4.8%). Improvement in dysphagia occurred after a mean of 3.3 (range 1-13) treatment sessions. Luminal patency allowing easy passing of the endoscope was achieved in 59 (93%) patients. Relief of symptoms and overall outcome improvement occurred in these patients in a relatively short time, there was body weight gain and an increase in serum albumin levels in 65% of patients. CONCLUSION: In conclusion, control of dysphagia by laser palliation suggests that endoscopic laser therapy should not be regarded as being in competition with other treatment techniques such as surgery, radiation, chemotherapy, dilatation or stents, in contrast it plays a complementary role to these palliative modalities.

Adenocarcinoma↗

PubMedDate not supplied

Lymphangiomatous cysts of the spleen: report of 3 cases and review of the literature.

Splenic cysts are very uncommon entities. The majority of these cysts are solitary and asymptomatic. They are mainly seen in children or young adults; and, they are usually seen either as solitary or multiple. For all splenic cysts, surgical intervention is advantageous, as the risk of splenic rupture is very high, even from minor abdominal injury. This report presents a summary of 3 cases with lymphangiomatous splenic cyst that were treated at the Gastroenterology Surgical Center, Mansoura University, Egypt from 1993 to 1996. Lymphangiomatous cyst of the spleen is considered a rare type of cyst that is usually found as a single or multi-cystic lesion.

Adult↗