Analysis of the protein expression and gene amplification of HER2 in gastric cancer / 中华胃肠外科杂志

<p><b>OBJECTIVE</b>To explore the clinical significance of protein expression and gene amplification of HER2 in gastric cancer.</p><p><b>METHODS</b>Immunohistochemistry (IHC) and chromogenic in situ hybridization (CISH) method were used to detect protein expression and gene amplification of HER2 in 80 specimens of gastric cancer patients.</p><p><b>RESULTS</b>Protein expression of HER2 was negative in 51 cases, (+) in 12 cases, (++) in 12 cases, (+++) in 5 cases, and the positive expression rate was 21.3% (17/80). Seven (8.8%) cases had gene amplification of HER2, including gene critical amplification in 3 (3.8%) cases. The result of IHC was positively correlated with CISH (P<0.05), and the coincidence rate was 85.0% (68/80). HER2 positive expression rate was higher in the gastroesophageal junction carcinoma, poorly differentiated and stage III-IIII gastric cancer (all P<0.05).</p><p><b>CONCLUSION</b>The gastric cancer tissue has high positive rate of protein expression and gene amplification of HER2, which is closely correlated to the development of gastric cancer.</p>

Expression of ZBTB8A in gastric cancer and its clinical significance / 中华胃肠外科杂志

<p><b>OBJECTIVE</b>To investigate the expression of ZBTB8A (zinc finger and BTB domain containing 8A) in gastric cancer tissues and its clinical significance.</p><p><b>METHODS</b>Level of ZBTB8A mRNA in human normal gastric cell line GES-1, human gastric cancer cell line SGC7901 and MGC803 was detected by real-time PCR. Levels of ZBTB8A mRNA and protein in cancer tissues, adjacent cancer tissues from 104 cases with primary gastric cancer and normal gastric mucosal tissues from 40 cases without malignant gastric diseases were detected by RT-PCR and immunohistochemistry, respectively. Association between ZBTB8A expression and clinicopathology was analyzed.</p><p><b>RESULTS</b>ZBTB8A mRNA expressions in SGC7901, MGC803 and GES-1 cells were 0.00138±0.00015, 0.00158±0.00021, 0.00036±0.000055, respectively, and differences among SGC7901, MGC803 and GES-1 were significant respectively (all P<0.05). ZBTB8A mRNA expression was significantly up-regulated in cancer tissues as compared to adjacent cancer tissues and normal tissues (0.0152±0.0126 vs. 0.0070±0.0061 and 0.0079±0.0036, all P>0.05), while no significant difference was found between adjacent cancer tissues and normal tissues (P>0.05). ZBTB8A expression was significantly associated with invasive depth, lymph node metastasis, tumor stage, and degree of adenocarcinoma differentiation (all P<0.05), but not with age, gender, histological type,gross type (all P>0.05).</p><p><b>CONCLUSION</b>ZBTB8A may be a potential carcinogenic factor in gastric carcinoma, and may also be involved in gastric adenocarcinoma cell differentiation, cancer invasion and metastasis.</p>

Analysis of prognostic factors for gastric stump cancer / 中华肿瘤杂志

<p><b>OBJECTIVE</b>To investigate the independent prognostic factors of long-term survival for gastric stump cancer after radical resection.</p><p><b>METHODS</b>The clinicopathological and follow-up data of 63 patients with gastric stump cancer undergoing surgical treatment from January 1996 to December 2006 in our hospital were analyzed retrospectively, including age, gender, types of reconstruction, tumor location, histological types, TNM stages, surgical treatment, prognosis and etc. The survival was estimated using Kaplan-Meier method and compared using log-rank test. The effect of independent factors on prognosis was determined by Cox regression multivariate analysis.</p><p><b>RESULTS</b>Radical resection was performed in 35 patients, including combined multiple organ resection (n=16). Surgery was palliative in 28 patients. All the 63 patients were followed up. The median survival time of these 63 patients was 21 months, and the overall 1-, 3-, 5-year survival rates were 76.2%, 31.7% and 18.8%, respectively. Univariate and multivariate analysis showed that surgical procedure, clinical stage and histological type were independent prognostic factors of gastric stump cancer, while age, gender, type of reconstruction and tumor location were not significantly correlated with prognosis.</p><p><b>CONCLUSIONS</b>Radical resection, clinical stage and histological type are main prognostic factors for gastric stump cancer. Radical resection is an effective way to prolong the postoperative survival time in patients with gastric stump cancer, especially in the early stage.</p>

Surgical treatment and prognostic factors for obstructing left colorectal cancer / 中华胃肠外科杂志

<p><b>OBJECTIVE</b>To investigate the outcomes of surgical treatment and the prognostic factors of long-term survival for obstructing left colorectal cancer.</p><p><b>METHODS</b>Clinicopathological and follow-up data of 93 patients with obstructing left colorectal cancer undergoing surgical treatment from January 2001 to December 2006 in the Affiliated Hospital of Medical College of Qingdao University were analyzed retrospectively.</p><p><b>RESULTS</b>There were 53 males and 40 females. The median age was 61 years old. Fifty-one patients had concurrent medical condition. Radical resection was performed in 67 patients, including one-stage resection (n=21), Hartmann procedure (n=35), and Miles procedure (n=11). Surgery was palliative in 26 patients, including diverting stoma (n=14), bypass surgery (n=7), and palliative resection (n=5). All the 93 patients were followed up. The 1-, 3-, and 5-year survival rates were 94%, 59%, and 38%, respectively. Univariate and multivariate analyses showed that radical resection, TNM staging, and preoperative level of carcinoembryonic antigen were independent prognostic factors (all P<0.05).</p><p><b>CONCLUSIONS</b>Radical resection, TNM stage, and preoperative CEA level are prognostic factors of obstructing left colorectal cancer. Early diagnosis, radical resection, and selection of appropriate surgical procedure are helpful to prolong survival time of patients with obstructing left colorectal cancer.</p>