Knockdown of ZNF479 inhibits proliferation and glycolysis of gastric cancer cells through regulating ß-catenin/c-Myc signaling pathway.

Gastric cancer is the fifth most common malignancy and the third most deadly tumor in the world. Zinc finger protein 479 (ZNF479) has been demonstrated to play crucial roles in hepatocellular carcinoma. However, the function of ZNF479 in gastric cancer remains to be clarified. The current study aimed to investigate the role of ZNF479 in gastric cancer progression and elucidate the potential molecular mechanism. In this study, Cell Count Kit-8 and colony formation assays demonstrated that knockdown of ZNF479 inhibited cell proliferation in AGS and SGC-7901 cells. Of note, knockdown of ZNF479 hinders tumor growth of xenograft tumor mice. What is more, knockdown of ZNF479 inhibited glucose uptake, lactate production, adenosine triphosphate level, and extracellular acidification ratio; increased oxygen consumption ratio in gastric cancer cells; and decreased the expression of glycolytic proteins both in vitro and in vivo. Furthermore, analysis mechanism suggests that ZNF479 participated in the regulation of gastric cancer progression through affecting the ß-catenin/c-Myc signaling pathway. Collectively, ZNF479 plays a role as an oncogene through modulating ß-catenin/c-Myc signaling pathway in the development of gastric cancer, which provides a new research target for future studies.

Medium-term follow-up of laparoscopic surgery on radical gastrectomy with D2 dissection for gastric cancer / 中国内镜杂志

Objective To explore the feasibility and clinical outcome of laparoscopy-assisted gastrectomy with D2 dissection by comparing the efficacy of open surgery on radical gastrectomy with D2 dissection for gastric cancer patients. Methods The patients with gastric cancer from October 2008 to August 2013 were divided into two groups according to the different surgical methods. Among them, 175 patients underwent laparoscopic surgery (laparoscopy-assisted surgery group, Group L), and 163 patients underwent laparotomy surgery (open surgery group, Group O). The number of lymph nodes dissected, postoperative recovery, complications, mortality and survival rate of the two groups were compared and analyzed. Results There was no significant difference in the number of lymph nodes resect between the two groups [Group L and Group O: (26.3 ± 13.9) vs (26.8 ± 10.2), t = -0.40, P = 0.684]. Compared with open surgery, the laparoscopy-assisted surgery showed significantly less intraoperative blood loss and quicker recovery of gastrointestinal function. The postoperative hospitalization time of laparoscopic group was less than that of laparotomy group, the difference was statistically significant (P < 0.05). No significant difference was found in 3-year survival rate between the two groups (Group L vs Group O: 92.00％ vs 92.63％, P = 0.262). Conclusions Compared to open surgery, laparoscopic gastrectomy is safer and has quicker postoperative recovery. There is no statistical difference in the number of resect lymph nodes between lapamscopic and open gastrectomy.

Centralized isolation of Helicobacter pylori from multiple centers and transport condition influences.

AIM: To evaluate the efficacy of centralized culture and possible influencing factors. METHODS: From January 2010 to July 2012, 66452 patients with suspected Helicobacter pylori (H. pylori) infection from 26 hospitals in Zhejiang and Jiangsu Provinces in China underwent gastrointestinal endoscopy. Gastric mucosal biopsies were taken from the antrum for culture. These biopsies were transported under natural environmental temperature to the central laboratory in Hangzhou city and divided into three groups based on their transport time: 5, 24 and 48 h. The culture results were reported after 72 h and the positive culture rates were analyzed by a χ (2) test. An additional 5736 biopsies from H. pylori-positive patients (5646 rapid urease test-positive and 90 (14)C-urease breath test-positive) were also cultured for quality control in the central laboratory setting. RESULTS: The positive culture rate was 31.66% (21036/66452) for the patient samples and 71.72% (4114/5736) for the H. pylori-positive quality control specimens. In the 5 h transport group, the positive culture rate was 30.99% (3865/12471), and 32.84% (14960/45553) in the 24 h transport group. In contrast, the positive culture rate declined significantly in the 48 h transport group (26.25%; P < 0.001). During transportation, the average natural temperature increased from 4.67 to 29.14 °C, while the positive culture rate declined from 36.67% (1462/3987) to 24.12% (1799/7459). When the temperature exceeded 24 °C, the positive culture rate decreased significantly, especially in the 48 h transport group (23.17%). CONCLUSION: Transportation of specimens within 24 h and below 24 °C is reasonable and acceptable for centralized culture of multicenter H. pylori samples.