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Advances in Study on Affecting Pathway of Intestinal Flora on Brain

Chinese Journal of Gastroenterology.2017;22(9):572-574. doi:10.3969/j.issn.1008-7125.2017.09.014

Intestinal flora plays an important role in promoting digestion,maintaining intestinal physiological function and regulating immune system. In recent years,it is found that intestinal flora not only regulates intestinal activity,but also affects the brain function and behavior. Early studies have shown that changes in probiotics may lead to alteration in brain function and mood. Studying the influence of intestinal flora on brain function helps us to catch on the pathogenesis of mental disorders such as autism,and expand our comprehension on the mechanism of brain activity as well. This article reviewed the advances in study on affecting pathway of intestinal flora on brain.

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Progress of Drug Treatment for Gastrointestinal Neuroendocrine Neoplasm

Yandong LI ; Ye WANG ; Shigang DING

Chinese Journal of Gastroenterology.2017;22(9):569-571. doi:10.3969/j.issn.1008-7125.2017.09.013

Neuroendocrine neoplasm (NEN)is a group of heterogeneous tumor originated from the neuroendocrine system,and gastrointestinal neuroendocrine neoplasm (GI-NEN)is the mostly frequently seen. The incidence of GI-NEN is increasing year by year,but the efficacy of clinical treatment is unsatisfactory. In recent years,new progress has been achieved in medical therapy of GI-NEN,including somatostatin analogues,interferon,mTOR inhibitor,vascular endothelial growth factor inhibitor and chemotherapeutic drugs. Peptide receptor radionuclide therapy also provides an additional option for treatment of metastatic GI-NEN. This article reviewed the recent progress of drug treatment for GI-NEN.

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Advances in Study on Relationship Between LncRNA and Inflammatory Diseases

Xinyu PEI ; Zonghao CHEN ; Yu ZHOU

Chinese Journal of Gastroenterology.2017;22(9):565-568. doi:10.3969/j.issn.1008-7125.2017.09.012

Long non-coding RNA (lncRNA)is a non-coding RNA which lacks a complete open reading frame (ORF)and plays an important role in biological processes such as cell proliferation,differentiation and apoptosis. At present,expression of lncRNA has been found to be abnormal in inflammatory reaction and inflammatory diseases. It might be involved in the development and progression of inflammatory diseases via regulating the expression of multiple genes and activation of signaling pathways. This article reviewed the progress in study on relationship between lncRNA and inflammatory diseases.

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Progress in Non-invasive Diagnosis and Assessment of Non-alcoholic Fatty Liver Disease

Tianyi GU ; Lungen LU

Chinese Journal of Gastroenterology.2017;22(9):561-564. doi:10.3969/j.issn.1008-7125.2017.09.011

Non-alcoholic fatty liver disease (NAFLD)is a clinical syndrome characterized by hepatic fat deposition, and not caused by chronic heavy drinking and other liver damage factors. The pathogenesis of NAFLD is associated with environmental,genetic,immune and other various factors. Early diagnosis is helpful not only for distinguishing between simple non-alcoholic fatty liver (NAFL)and non-alcoholic steatohepatitis (NASH),but also for grading the extent of NAFLD lesion and delaying its further development. This article reviewed the clinical research progress of non-invasive diagnosis and evaluation of NAFLD.

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Current Status of Endoscopic Screening and Diagnosis of Early Gastric Cancer in Japan

Jing LIANG ; Fengmei WANG ; Kiyoaki TANIGUCHI

Chinese Journal of Gastroenterology.2017;22(9):556-560. doi:10.3969/j.issn.1008-7125.2017.09.010

Gastric cancer is a leading cause of cancer death worldwide. It is well known that Japan is the world leader in endoscopic diagnosis and treatment of early gastric cancer (EGC),thus the current status and executive standard in this area in Japan is worthy of studying. This paper reviewed numerous researches,reviews and epidemiological data, summarized the basic principles,standardized protocols,and the diagnostic algorithm and criteria and progress on endoscopic screening and diagnosis of EGC in Japan. Finally,the differences in endoscopic strategies for EGC existed between Japan and China were compared.

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Esophageal Non-variceal Hemorrhage:A Retrospective Analysis of 175 Cases

Yanmei ZHANG ; Hui LIU ; Xiaochun SHEN ; Chunhui LAN ; Dongfeng CHEN ; Hongli CUI

Chinese Journal of Gastroenterology.2017;22(9):553-555. doi:10.3969/j.issn.1008-7125.2017.09.009

Background:Esophageal non-variceal hemorrhage is relatively uncommon in clinical,however,it can be life-threatening in severe cases. Thus,retrospective analysis of esophageal non-variceal hemorrhage could provide important evidence for its diagnosis and treatment. Aims:To analyze the clinical characteristics of esophageal non-variceal hemorrhage. Methods:A total of 175 cases of esophageal non-variceal hemorrhage from January 2006 to December 2016 at Daping Hospital were enrolled. Gender,age,cause of bleeding,location of bleeding,season of onset,treatment and prognosis were retrospectively analyzed. Results:The ratio of male to female was 3. 5: 1 in 175 patients with esophageal non-variceal hemorrhage,73. 1％ of patients were middle-aged and elderly. The main cause of bleeding of esophageal non-variceal hemorrhage were cardiac mucosal laceration syndrome (46. 9％),esophageal cancer (23. 4％),esophageal ulcer (12. 6％)and esophageal foreign body (12. 0％). The most common site of bleeding was lower esophagus (70. 9％). Fifty-one patients accepted endoscopic treatment or surgery. After treatment,142 patients (81. 1％)were cured or improved,and death was occurred in 27 patients (15. 4％). Conclusions:The incidence of esophageal non-variceal hemorrhage is higher in male than in female,and is commonly seen in middle-aged and elderly patients. The most common cause of bleeding of esophageal non-variceal hemorrhage is cardiac mucosal laceration syndrome,and the most common site of bleeding is lower esophagus. Medicine combined with endoscopic treatment is effective for most of the patients.

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Effect of Prophylactic Pancreatic Duct Stenting on Post-ERCP Pancreatitis in Patients With Risk Factors

Guofa JIA ; Hong SHAN ; Liying WU ; Di ZHANG ; Jinzhi WANG ; Xiaotian WANG ; Liangsong ZHU

Chinese Journal of Gastroenterology.2017;22(9):548-552. doi:10.3969/j.issn.1008-7125.2017.09.008

Background:Pancreatitis is the main complication of ERCP,and a variety of risk factors will increase its risk. Studies showed that temporary pancreatic duct stent can reduce the incidence of post-ERCP pancreatitis (PEP). Aims:To study the efficacy and safety of prophylactic pancreatic duct stenting on preventing PEP in patients with risk factors. Methods:Patients undergone ERCP and accompanied with one or more PEP-associated risk factors from November 2013 to November 2016 at Huaibei People's Hospital were enrolled,and were divided randomly into pancreatic duct stenting group (observation group)and non-stenting group (control group). Serum levels of amylase at 4,24 and 48 hours after the procedure and incidence of PEP were compared between the two groups. Results:A total of 297 patients were enrolled, and 147 patients were in observation group,and 150 patients in control group. No significant differences in gender,age and ERCP disease spectrum were found between the two groups (P > 0. 05). Incidence of PEP was significantly decreased in observation group than in control group (6. 1％ vs. 16. 0％,P < 0. 05). Serum levels of amylase at 4,24 and 48 hours after the procedure were significantly decreased in observation group than in corresponding control group (P < 0. 05), however,no significant difference in incidence of hyperamylasemia was found between the two groups (59. 2％ vs. 54. 7％, P > 0. 05). Conclusions:Prophylactic pancreatic duct stenting may decrease the incidence of PEP in patients accompanied with PEP-associated risk factors, especially could decrease the severity of PEP. However, the incidence of hyperamylasemia is not decreased.

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Low Nanomolar Cucurbitacin-I Induces G2 / M Phase Arrest and Apoptosis in Gastric Cancer Cells and the Underlying Mechanism

Jian LI ; Xiuling XIAO ; Yan LI ; Xiaoping ZOU ; Chao DENG

Chinese Journal of Gastroenterology.2017;22(9):523-528. doi:10.3969/j.issn.1008-7125.2017.09.003

Background:Upon inhibition of STAT3 signaling pathway,cucurbitacin-I elicits anticancer effect in various malignancies. However,the anticancer effect and underlying mechanism of cucurbitacin-I in gastric cancer is still elusive. Aims:To explore the effect of low nanomolar cucurbitacin-I on cell proliferation,cell cycle and apoptosis in human gastric cancer cells and the underlying mechanism in vitro. Methods:Human gastric adenocarcinoma cell lines AGS and HGC-27 were treated with cucurbitacin-I at low nanomolar concentration. The anti-proliferative effect of cucurbitacin-I was detected by CCK-8 assay and colony formation assay. Flow cytometry was used to assess the cell cycle and apoptosis. Expressions of cell cycle-related proteins,as well as activation of related pathways such as caspase-3 / PARP apoptotic pathway,STAT3, GADD45α and JNK/ p38 MAPK signaling pathways were determined by Western blotting. Results:Cucurbitacin-I markedly inhibited the growth of gastric cancer cells at low nanomolar concentration by inducing G2 / M phase arrest and apoptosis via a STAT3-independent manner. Furthermore,it was revealed that the anticancer effect of cucurbitacin-I was associated with up-regulation of GADD45α,activation of JNK/ p38 MAPK signaling pathway and the subsequent apoptotic events. Conclusions:The present study provides new insights into the mechanism of anticancer effect of cucurbitacin-I, supporting cucurbitacin-I as an attractive therapeutic drug in gastric cancer.

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Establishing A Modified Isolated Perfused Rat Liver Model for Applied in Study of Cold Storage of Liver Grafts

Shaojun SHI ; Jianxin ZHENG ; Tian QIN ; Xiaokang LI ; Feng XUE ; Qiang XIA

Chinese Journal of Gastroenterology.2017;22(9):517-522. doi:10.3969/j.issn.1008-7125.2017.09.002

Background:Cold storage and ischemia-reperfusion injury of liver grafts are critical for the prognosis of patients undergoing liver transplantation. Establishing a stable cold storage and reperfusion animal model is a fundamental measure for related studies. Aims:To establish a modified isolated perfused rat liver model for comprehensive assessment of liver grafts in studies on preservation of liver grafts before transplantation. Methods:Twelve Sprague-Dawley rats were randomly allocated into two groups. Livers of rats in control group were retrieved and perfused immediately for 90 minutes without preservation. In experimental group,liver grafts underwent a 30-minute warm ischemia followed by 24-hour cold storage before ex vivo perfusion. The perfusate was collected dynamically for monitoring the levels of transaminases,electrolytes and pH value;the portal vein pressure of liver grafts was measured by pressure sensor,and the hepatic hydrogen peroxide (HPO)level was assessed by microprobe for free radicals. The bile production was recorded after the ex vivo perfusion;meanwhile,the levels of malondialdehyde (MDA)and superoxide dismutase (Cu/ Zn SOD),the histopathological changes and apoptosis of hepatocytes of liver grafts were examined. Results:Compared with the control group,the levels of AST and ALT,the portal vein pressure and the HPO level of liver grafts in experimental group were obviously increased throughout the perfusion. Furthermore,the bile production and level of Cu/ Zn SOD of liver grafts in experimental group were significantly decreased. The histopathological injury and hepatocytes apoptosis of liver grafts were milder in control group. Conclusions:The liver function and antioxidant effect were reduced in warm ischemic and cold preserved liver grafts. The modified isolated perfused rat liver model established in this study is useful for monitoring and evaluation of the cold storage and reperfusion injury in liver grafts.

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Diagnosis and Treatment Strategy for Gastric Mucosal Dysplasia

Meng XUE ; Liangjing WANG

Chinese Journal of Gastroenterology.2017;22(9):513-516. doi:10.3969/j.issn.1008-7125.2017.09.001

Different diagnostic criteria are existed nowadays in grading the dysplasia of gastric mucosa in clinical practice. Novel endoscopic techniques and molecular markers could facilitate the pathologic grading of dysplasia. As to the treatment strategy,it is debatable whether to choose endoscopic dissection or conservative follow-up. Here,we reviewed the diagnostic grading and therapeutic options with regard to the dysplasia of gastric mucosa.

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