Relationship between expression of EGFR in gastric cancer tissue and clinicopathological features

OBJECTIVE@#To investigate the relationship between the expression of epidermal growth factor receptor (EGFR) in gastric cancer and the clinicopathological features and prognosis.@*METHODS@#A total of 78 paraffin specimens of gastric cancer operation were collected. The immunohistochemical method was used to detect the expression of EGFR in 78 cases of gastric cancer and 20 cases of adjacent normal tissue. The relationship between the high expression of EGFR and clinicopathological features was analyzed.@*RESULTS@#EGFR positive expression rate in the 78 cases of gastric cancer tissue was 57.7 % (45/78), while EGFR was not expressed in 20 cases of adjacent normal tissue. The high EGFR expression was positively correlated with the position of gastric cancer, tumor size, cell differentiation, invasive depth, lymph node metastasis and TNM staging, yet having no obvious relation with gender or age.@*CONCLUSIONS@#EGFR expression level in gastric cancer is closely related to the incidence and development of gastric cancer, which can provide a theoretical basis for the targeted therapy for gastric cancer with EGFR as the target.

Characterization of the changes in comparative genomic hybridization in esophageal cancer patients with family history / 南方医科大学学报

<p><b>OBJECTIVE</b>To characterize the profile of chromosomal imbalances in esophageal cancer (EC) with or without family history in Linzhou, Henan Province of China.</p><p><b>METHODS</b>Comparative genomic hybridization (CGH) was used to examine 13 cases with positive family history of EC and 32 cases with negative family history of EC. RESULTS DNA copy number gains on chromosome 10q was observed only in the cases with postivie family history of EC (30%), and none in cases with a negative family history (P<0.05). DNA copy number losses on chromosome 15q were significantly higher in cases with postivie family history (38% vs 6%, P<0.05). The frequency of DNA copy number gains in 3q, 5p, 7p, 8q and DNA copy number losses in 3p, 19q, 9q were similar in the two groups (both beyond 20%) (P>0.05).</p><p><b>CONCLUSIONS</b>Frequent DNA copy number gains on chromosome 10q and losses on chromosome 15q in EC casers with postivie family history indicate that these chromosome sites may harbor the genes related to high susceptibility to EC. Such chromosomal sites as 3q, 5p, 7p, 8q, 3p, 19q, and 9q may contain important genes related with the environmental risk factors of esophageal carcinogenesis.</p>