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Perspective on This Article from Estrogen Stimulates the Expression of Mismatch Repair Gene hMLH1 in Colonic Epithelial Cells

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Purpose:Metallothionein 2A (MT2A) suppresses the progression of human gastric cancer potentially through an “MT2A–NF-κB pathway” with unclear mechanisms. This study explored the role of a transcription factor, myeloid zinc-finger 1 (MZF1), in MT2A-NF-κB pathway and its clinical significance in gastric cancer.Experimental Design:MZF1 expression and function in gastric cancer were investigated in vitro and in vivo. The relationship between MZF1 and MT2A was determined by gain-of-function and loss-of-function assays in gastric cancer cells and an immortalized gastric cell line GES-1. The prognostic value of MZF1 expression in association with MT2A was evaluated using IHC in two cohorts.Results:MZF1 was epigenetically silenced in human gastric cancer cell lines and primary tumors. Overexpression of MZF1 in gastric cancer cells suppressed cell proliferation and migration, as well as the growth of xenograft tumors in nude mice. Knocking-down of MZF1 transformed GES-1 cells into a malignant phenotype characterized by increased cell growth and migration. Mechanistically, MZF1 was upregulated in both GC and GES-1 cells by MT2A ectopically expressed or induced upon treatment with a garlic-derived compound, diallyl trisulfide (DATS). MZF1 associated with MT2A was colocalized in the nuclei of GES-1 cells to target the promoter of NF-κB inhibitor alpha (NFKBIA). Clinically, MT2A and MZF1 were progressively downregulated in clinical specimens undergoing gastric malignant transformation. Downregulation of MT2A and MZF1 was significantly correlated with poorer patient prognosis.Conclusions:MT2A exerts its anti-gastric cancer effects by complexing with MZF1 to target NFKBIA. MT2A/MZF1 may serve as a valuable prognostic marker and a novel therapeutic target for human gastric cancer.

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Objective Helicobacter pyloriinfection is mostly a family-based infectious disease. To facilitate its prevention and management, a national consensus meeting was held to review current evidence and propose strategies for population-wide and family-basedH. pyloriinfection control and management to reduce the related disease burden. Methods Fifty-seven experts from 41 major universities and institutions in 20 provinces/regions of mainland China were invited to review evidence and modify statements using Delphi process and grading of recommendations assessment, development and evaluation system. The consensus level was defined as ≥80% for agreement on the proposed statements. Results Experts discussed and modified the original 23 statements on family-basedH. pyloriinfection transmission, control and management, and reached consensus on 16 statements. The final report consists of three parts: (1)H. pyloriinfection and transmission among family members, (2) prevention and management ofH. pyloriinfection in children and elderly people within households, and (3) strategies for prevention and management ofH. pyloriinfection for family members. In addition to the ‘test-and-treat’ and ‘screen-and-treat’ strategies, this consensus also introduced a novel third ‘family-basedH. pyloriinfection control and management’ strategy to prevent its intrafamilial transmission and development of related diseases. Conclusion H. pyloriis transmissible from person to person, and among family members. A family-basedH. pyloriprevention and eradication strategy would be a suitable approach to prevent its intra-familial transmission and related diseases. The notion and practice would be beneficial not only for Chinese residents but also valuable as a reference for other highly infected areas.

OBJECTIVE We aimed to investigate whether Chinese endoscopists without narrow-band imaging (NBI) experiences could achieve high accuracy in the real-time diagnosis of colorectal polyps using NBI International Colorectal Endoscopic (NICE) classification after web-based training. METHODS Altogether 15 endoscopists from five centers with no NBI experiences followed a short, web-based training program on the NICE classification and took web-based test. Their performances were compared with 15 matched experienced endoscopists with no NBI experience who received no NBI training. These 15 trained endoscopists then made real-time diagnoses of colorectal neoplasia. A logistic regression was used to assess potential predictors of diagnostic performance. RESULTS Compared with those who received no training, trained endoscopists achieved comparable overall accuracy (85.3% vs 83.1%, P = 0.408) and accuracy at a high-confidence level (87.0% vs 86.0%, P = 0.670), but had a higher confidence rate (86.1% vs 83.7%, P = 0.004) for the diagnosis of neoplasia. Real-time diagnostic accuracy, sensitivity and specificity were 94.3% (95% confidence interval [CI] 91.5%-96.2%), 96.2% (95% CI 93.4%-97.9%) and 85.3% (95% CI 74.8%-92.1%) at high-confidence level. The high-confidence level was the strongest predictor of real-time diagnostic accuracy (odds ratio 12.66, P

Background: Achalasia is a rare primary esophageal motility disorder disease. It is reported that the long-term effect of fully coated anti-reflux metal stent (FCARMS) implantation is satisfactory. Operated by a skilled and experienced endoscopist, the effect of POEM treatment is equivalent to that of surgical myotomy. So far, there is still few evidence to prove stent implantation or POEM which is better for achalasia. The choice of treatment for achalasia is still controversial. Therefore, the aim of this study is to find a more suitable therapy for achalasia by comparing the efficacy of FCARMS implantation and POEM.Methods: A propensity score (PS) matching (1:2) was used in this retrospective cohort study. Data collected from consecutive patients of Achalasia, receiving FCARMS implantation or POEM therapy at the department of gastroenterology, the Seventh Medical Center of the Chinese People’s Liberation Army General Hospital from May 2007 to May 2018. According to their previous treatment, they are divided into two groups, FCARMS group and POEM group. Clinical efficacy and complications were compared between the two groups.Results: A total of 166 cases were collected, including 113 cases of FCARMS and 53 cases of POEM. By PS matching, 150 patients were enrolled (100 cases of FCARMS and 50 cases of POEM). By comparison, the FCARMS group has shorter operation time, shorter fasting time and lower hospitalization costs than the POEM group (pConclusions: Stent placement is a cost-effective and safe treatment option for achalasia. The short-term effect (less than 6 mons) of FCARMS is similar to that of POEM, the long-term effect (more than 2 years)，POEM is better than FCARMS. HRMⅡis most suitable for POEM treatment. It indicate that Patients can choose treatment methods according to their own conditions.

Background Achalasia is a rare primary esophageal motility disorder disease. It is reported that the long-term effect of fully coated anti-reflux metal stent (FCARMS) implantation is satisfactory. Operated by a skilled and experienced endoscopist, the effect of per-oral endoscopic myotomy (POEM) treatment is equivalent to that of surgical myotomy. So far, there is still few evidence to prove FCARMS implantation or POEM which is better for achalasia. The choice of treatment for achalasia is still controversial. The aim of this study is to find a more suitable therapy for achalasia by comparing the efficacy of FCARMS implantation and POEM. Methods A propensity score (PS) matching (1:2) was used in this retrospective cohort study. Data collected from consecutive patients of Achalasia, receiving FCARMS implantation or POEM therapy at the department of gastroenterology, the Seventh Medical Center of the Chinese People’s Liberation Army General Hospital from May 2007 to May 2018. According to their previous treatment, they are divided into two groups, FCARMS group and POEM group. Clinical efficacy and complications were compared between the two groups. Results A total of 166 cases were collected, including 113 cases of FCARMS and 53 cases of POEM. By PS matching, 150 patients were enrolled (100 cases of FCARMS and 50 cases of POEM). By comparison, the FCARMS group has shorter operation time, shorter fasting time and lower hospitalization costs than the POEM group (p p = 0.00 p = 0.39), and the 2-year remission rates were 61% and 90%, respectively (p = 0.00). Conclusions Stent placement is a cost-effective and safe treatment option for achalasia. The short-term effect (less than 6 months) of FCARMS is similar to that of POEM, the long-term effect (more than 2 years), POEM is better than FCARMS. HRMIIis most suitable for POEM treatment. It indicate that Patients can choose treatment methods according to their own conditions.

Background: Most gastric cancer (GC) patients are diagnosed at an advanced stage, which indicates their poor prognosis. We aimed to investigate novel fecal microbial markers for clinical application in the screening and early diagnosis of gastric cancer (GC). Methods: This is an observational study from three cohorts. In discovery cohort, 16S rRNA gene analysis was performed in paired samples (gastric tissues, feces) from GC and CG patients to determine differential microbes. The relative abundances of the differential microbes were detected using qPCR in training cohort. The diagnostic efficacy of fecal marker Sa/Sc was validated in validation cohort. Findings: 575 gastric cancer (GC) patients, 468 chronic gastritis (CG) patients were enrolled from ten hospitals in China. Significant enrichments of Streptococcus anginosus (Sa) and Streptococcus constellatus (Sc) in both cancerous tissues (P < 0·05) and feces ( P < 0·0001) were observed in patients with intraepithelial neoplasia, early and advanced GC. Either the marker parallel test Sa ∪ Sc or single marker Sa/Sc demonstrated superior sensitivity (Sa: 75·6% vs. 72·1%, P

Most patients with gastric cancer (GCa) are diagnosed at an advanced stage. We aimed to investigate novel fecal signatures for clinical application in early diagnosis of GCa.This was an observational study that included 1043 patients from 10 hospitals in China. In the discovery cohort, 16S ribosomal RNA gene analysis was performed in paired samples (tissues and feces) from patients with GCa and chronic gastritis (ChG) to determine differential abundant microbes. Their relative abundances were detected using quantitative real-time polymerase chain reaction to test them as bacterial candidates in the training cohort. Their diagnostic efficacy was validated in the validation cohort.Significant enrichments of Streptococcus anginosus (Sa) and Streptococcus constellatus (Sc) in GCa tumor tissues (P.05) and feces (P.0001) were observed in patients with intraepithelial neoplasia, early and advanced GCa. Either the signature parallel test Sa∪Sc or single signature Sa/Sc demonstrated superior sensitivity (Sa: 75.6% vs 72.1%, P.05; Sc: 84.4% vs 64.0%, P.001; and Sa∪Sc: 91.1% vs 81.4%, P.01) in detecting early GCa compared with advanced GCa (specificity: Sa: 84.0% vs 83.9%, Sc: 70.4% vs 82.3%, and Sa∪Sc: 64.0% vs 73.4%). Fecal signature Sa∪Sc outperformed Sa∪CEA/Sc∪CEA in the discrimination of advanced GCa (sensitivity: 81.4% vs 74.2% and 81.4% vs 72.3%, P.01; specificity: 73.4% vs 81.0 % and 73.4% vs 81.0%). The performance of Sa∪Sc in the diagnosis of both early and advanced GCa was verified in the validation cohort.Fecal Sa and Sc are noninvasive, accurate, and sensitive signatures for early warning in GCa. (ClinicalTrials.gov, Number: NCT04638959).

Objectives Histological discrepancies between biopsy and resection specimens are common. In this study, we aimed to analyze the risk factors predicting histological upgrade or downgrade of biopsy-diagnosed gastric low-grade dysplasia (LGD). Methods The medical records of patients with 104 biopsy-diagnosed gastric LGD from January 2011 to December 2017 were collected. The association of endoscopic characteristics with histological discrepancies between the biopsy and resection specimens was analyzed. The risk factors for histological upgrade were studied using the multivariate analysis. Results Among the 104 lesions, 88 were removed by endoscopic resection and 16 were monitored. The upgrade and downgrade rates of the pathological diagnosis were 48.9% and 12.5%, respectively. Lesion size >20 mm, surface redness and positive results in magnifying endoscopy with narrow band imaging (ME-NBI) were risk factors for histological upgrade. Compared with the negative ME-NBI group, the positive ME-NBI group had a higher upgrade rate (56.8% vs 7.1%) but a lower downgrade rate (2.7% vs 64.3%). In addition, 11 of the 16 the gastric LGD with negative ME-NBI findings were monitored, and all 11 lesions regressed to gastritis during follow-up. Conclusions Endoscopic resection should be recommended in cases of LGD showing surface redness, with a lesion size of >20 mm or positive ME-NBI result, whereas regular follow-up may be an option for LGD with negative ME-NBI result.

Objective To understand the mental health status of officers and soldiers (OSs) in a Chinese army unit, and analyze its relationship with Helicobacter pylori (H.pylori) infection. Methods Cross sectional extraction of 1293 male soldiers from a certain unit of Chinese army in September 2015, aged 17-37 years old, average age 20.5±3.2. Using the symptom self rating scale (SCL-90) to conduct a psychological evaluation, comparison between the evaluation results and the Chinese military norm was conducted to understand the mental health status of OSs in the unit. 13C-urea breath test was used to detect H.pylori infection, and the relationship between the positivity rate of various factors, the SCL-90 score and H.pylori infection were analyzed. Ninety OSs who had desire to eradicate H.pylori serves as the experimental group, and 90 H.pylori-infected OSs as control group. The experimental group received quadruple-drug eradication therapy, control group received no drug treatment. SCL-90 scores before and after the treatment were compared, and SCL-90 scores after treatment in the experimental group and those in the control group were also compared for analyzing the relationship between the OSs psychological status and H.pylori infection. Results The SCL-90 score of the OSs was lower than the norm of Chinese army, and the difference was statistically significant (P＜0.05). The psychological screening positive rate was higher in H.pylori-positive OSs than H.pylori-negative those and the positive rates of psychological screening factors somatization, interpersonal sensitivity, hostility and paranoid were higher in H.pylori-positive OSs than in H.Pylorinegative those, and the difference was statistically significant (P＜0.05). After the eradication of H.pylori in the experimental group these factor scores were lower than those before eradication. Compared with control group SCL-90 scores, soldiers somatization, interpersonal sensitivity, anxiety, hostility, paranoid factor score in experimental group after treatment were lower, the differences were statistically significant (P＜0.05). Conclusion The mental health is better in OSs in this unit, the negative mental status is obvious in H.pylori-infected OSs than in H.pylori-negative those, and to eradicate H.pylori can improve their psychological state. DOI: 10.11855/j.issn.0577-7402.2017.02.16

Anesthetics are thought to be involved in immunomodulation. Avertin is one of the safest and most commonly used intravenous anesthetics in rodent experiments; it is also widely used in euthanasia of inflammatory bowel disease (IBD) models. This study aimed to define the role and mechanism of action of Avertin on murine colitis. We assessed the effects of a single Avertin injection on colitis using the disease activity index (DAI), pathology, enzyme-linked immunosorbent assay (ELISA), multiplex-ELISA, flow cytometry, and routine blood examination in wild-type (WT) and dextran sodium sulphate (DSS)-treated mice. Although Avertin caused acute cecitis in WT mice after 24 h and aggravated inflammation in the medium term, it alleviated inflammation in the late stage of DSS-induced colitis according to the DAI. Avertin upregulated MPO production and induced the accumulation of neutrophils and macrophages in intestinal mucosa of both WT and DSS-treated mice; the altered MPO might indicate a change in respiratory burst. However, it exhibited a more effective suppression of inflammatory factors secreted by macrophages as the colitis progressed. Avertin led to an increase in neutrophils and decrease in monocytes in both WT and DSS-treated mice blood. Our findings suggest that Avertin aggravates inflammation in the early and medium terms, but alleviates inflammation in the late stage of colitis by regulating neutrophils and macrophages.

Background Data from single-center experience or small sample-sized studies have shown that chromoendoscopy (CE) might be superior to white-light endoscopy (WLE) for dysplasia surveillance in ulcerative colitis (UC) patients. We performed a prospective randomized trial with a long-term follow-up to compare the detection rate of dysplasia among WLE with targeted biopsies (WLT), WLE with random biopsies (WLR), and dye-based CE with targeted biopsies (CET) in UC patients. Methods Patients with long-standing UC were enrolled from 11 medical centers from March 2012 to December 2013 and randomized into three arms (WLT, WLR, and CET). Only high-definition endoscopy was used in all three groups. The patients were followed up by annual endoscopy with biopsies through December 2017. Results With a median follow-up time of 55 months, a total of 122 patients with 447 colonoscopies were finally analysed in the per-protocol set: WLT (n = 43), WLR (n = 40), and CET (n = 39). A total of 34 dysplastic lesions were found in 29 colonoscopies of 21 patients. WLR and CET could identify more colonoscopies that diagnosed dysplasia than WLT (8.1% and 9.7% vs 1.9%; P = 0.014 and 0.004, respectively). WLR obtained more biopsied samples than WLT and CET (16.4 ± 5.1 vs 4.3 ± 1.4 and 4.3 ± 1.4; both P Conclusions For a better outcome of cancer/dysplasia surveillance in patients with long-standing UC, CET appeared to be more effective than WLT and less tedious than WLR. CET was found to be particularly useful when a long-term (>3 years) follow-up was conducted for dysplasia surveillance. The trial was registered on www.chictr.org.cn (ChiCTR1900023689).

Background: Chemoprevention of colorectal adenoma and cancer remains its importance in public health. The rate of adenoma recurrence in the first year after polypectomy is very high in East Asian populations. We aimed to investigate the clinical potential and safety of Berberine hydrochloride for colorectal adenoma recurrence. Methods: This double-blind, randomised, placebo-controlled clinical trial was done in seven hospital centers across six provinces in China. Patients with recently diagnosed adenomas and after complete polypectomy were recruited and randomized into a BBR group (Berberine hydrochloride 0.3g, twice daily) or a placebo group. They were anticipated for at least one follow-up colonoscopy until a diagnosis of CRA/CRC or the last enrolled patient reached the 2-year follow-up. The primary efficacy endpoint was the recurrence of adenomas at any follow-up colonoscopy. The secondary outcomes were the recurrences of polypoid lesions as well as advanced adenomas or CRC. Findings: Between Nov 14, 2014 and Dec 29, 2018, 1136 patients were screened for eligibility, and 1108 underwent randomization. 553 patients were assigned to receive Berberine hydrochloride and 555 to placebo. An unadjusted RR for recurrent adenomas and all polypoid lesions were 0.77 (95% CI, 0.66 to 0.91) and 0.77 (95% CI, 0.67 to 0.89), representing a decrease of 22.72% and 22.70%, respectively. No CRC occurred during the whole trial. Interaction test showed taking BBR was effective in female with unadjusted RR for recurrent adenomas of 0.58 (95% CI, 0.41 to 0.81); P=0.07 (Alpha = 0.10). No serious adverse events were reported. Interpretation: Although the mechanism has not been fully elucidated yet, Berberine hydrochloride was effective to reduce colorectal adenoma recurrence after polypectomy. Trial Registration: This trial is registered with ClinicalTrials.gov number NCT02226185. Funding Statement: This project was supported by grants from the National Natural Science Foundation of China (81421001, 81530072, 81830081 and 8177100232), the funds from Shanghai Shenkang Center (SHDC12018121), from Shanghai Municipal Key Clinical Specialty, and from Innovative research team of high-level local universities in Shanghai. The project was also partially supported by Top-Notch project of China and Shanghai Municipal Education Commission-Gaofeng Clinical Medicine Grant (20152514). Declaration of Interests: The authors declare no competing interests. Ethics Approval Statement: Approval for this study was obtained from the Ethics Committee of Renji Hospital, Shanghai Jiao-Tong University School of Medicine on 13th August 2014. The protocol and informed consent forms were also approved by the institutional ethics committees at each of the participating clinical centers.

With the digestive endoscopic tunnel technique (DETT), many diseases that previously would have been treated by surgery are now endoscopically curable by establishing a submucosal tunnel between the mucosa and muscularis propria (MP). Through the tunnel, endoscopic diagnosis or treatment is performed for lesions in the mucosa, in the MP, and even outside the gastrointestinal (GI) tract. At present, the tunnel technique application range covers the following: (1) Treatment of lesions originating from the mucosal layer, e.g., endoscopic submucosal tunnel dissection for oesophageal large or circular early-stage cancer or precancerosis; (2) treatment of lesions from the MP layer, per-oral endoscopic myotomy, submucosal tunnelling endoscopic resection, etc.; and (3) diagnosis and treatment of lesions outside the GI tract, such as resection of lymph nodes and benign tumour excision in the mediastinum or abdominal cavity. With the increasing number of DETTs performed worldwide, endoscopic tunnel therapeutics, which is based on DETT, has been gradually developed and optimized. However, there is not yet an expert consensus on DETT to regulate its indications, contraindications, surgical procedure, and postoperative treatment. The International DETT Alliance signed up this consensus to standardize the procedures of DETT. In this consensus, we describe the definition, mechanism, and significance of DETT, prevention of infection and concepts of DETT-associated complications, methods to establish a submucosal tunnel, and application of DETT for lesions in the mucosa, in the MP and outside the GI tract (indications and contraindications, procedures, pre- and postoperative treatments, effectiveness, complications and treatments, and a comparison between DETT and other operations).

Histological discrepancies between biopsy and resection specimens are common. In this study, we aimed to analyze the risk factors predicting histological upgrade or downgrade of biopsy-diagnosed gastric low-grade dysplasia (LGD).The medical records of patients with 104 biopsy-diagnosed gastric LGD from January 2011 to December 2017 were collected. The association of endoscopic characteristics with histological discrepancies between the biopsy and resection specimens was analyzed. The risk factors for histological upgrade were studied using the multivariate analysis.Among the 104 lesions, 88 were removed by endoscopic resection and 16 were monitored. The upgrade and downgrade rates of the pathological diagnosis were 48.9% and 12.5%, respectively. Lesion size20 mm, surface redness and positive results in magnifying endoscopy with narrow band imaging (ME-NBI) were risk factors for histological upgrade. Compared with the negative ME-NBI group, the positive ME-NBI group had a higher upgrade rate (56.8% vs 7.1%) but a lower downgrade rate (2.7% vs 64.3%). In addition, 11 of the 16 the gastric LGD with negative ME-NBI findings were monitored, and all 11 lesions regressed to gastritis during follow-up.Endoscopic resection should be recommended in cases of LGD showing surface redness, with a lesion size of20 mm or positive ME-NBI result, whereas regular follow-up may be an option for LGD with negative ME-NBI result.

Background: Colorectal cancer (CRC) is the third most commonly diagnosed cancer in males and the second in females, with an estimated 1.4 million cases and 693,900 deaths in 2012. Colonoscopy is the cornerstone for the detection and prevention of CRC. In addition, endoscopic treatment for CRC at an early stage can effectively improve patients' quality of life and cure rate. Summary: This review focuses on endoscopic approaches, including white light endoscopy, chromoendoscopy, magnifying endoscopy and therapeutic endoscopy, for the evaluation and treatment of superficial colorectal neoplasms. Key Message: Understanding the preoperative evaluation, indications and techniques of endoscopic mucosal resection/endoscopic submucosal dissection as well as postoperative surveillance for superficial colorectal neoplasms is critical for providing appropriate management to the patients. Practical Implications: Endoscopic therapy, a method preserving organ function and improving quality of life, is a widely applied microinvasive treatment for superficial colorectal neoplasms. This review describes the basics and developments of endoscopic approaches and may facilitate daily practice for superficial colorectal neoplasms.

Background/Aims: Early colorectal (CR) neoplasm can be cured by endoscopic submucosal dissection (ESD), but clinical experience and factors associated with complications from ESD for CR neoplasms in China have not been reported . Methods: Seventy-eight cases of early CR neoplasm treated with endoscopic resection performed between December 2012 and December 2013 at Beijing Military General Hospital were included. Factors associated with ESD complications and procedure times were evaluated. Results: The en bloc resection rate was 88.5% (69/78), tumor size was 32.1±10.7 mm, and procedure time was 71.8±49.5 minutes. The major complication was perforation, which occurred in 8.97% of the ESD procedures. Multivariate logistic regression analysis indicated that only tumor size (p=0.022) was associated with ESD perforation. Tumor size (p

Background: Hereditary colorectal cancer (CRC) accounts for about 5% of the total incidence of CRC. During the last decades, there have been great advances in the research of hereditary CRC in China. Summary: This review mainly focuses on advances of the genetic basis, clinicopathological features, diagnosis, chemoprevention and treatment of hereditary CRC in China. Key Message: Hereditary CRC has a higher risk to initiate the progression towards neoplasia than sporadic CRC. It can be diagnosed by clinical manifestation or the relevant genetic testing so as to guide the clinical treatment to improve the survival rate and survival quality of patients. Practical Implications: Hereditary CRC includes hereditary nonpolyposis CRC (Lynch syndrome), familial adenomatous polyposis and other rare types such as Peutz-Jeghers syndrome and familial juvenile polyposis. Based on the clinical manifestations and family history, highly suspected cases can be screened for in the general population and the diagnosis ruled out by genetic analysis. Then, chemoprevention, endoscopic intervention or surgery can be selected properly to improve patients' survival and quality of life.

Objective To investigate the prevalence of Helicobacter pylori (H. pylori) infestation and its related risk factors in the recruits at Hulunbuir pastureland and Ala Shan Desert. Methods Nine hundred male recruits (16-24 years old) were enrolled in this cross-sectional study. H. pylori infection was detected by 13C-urea breath test, and the related risk factors were surveyed by using questionnaires. The data of risk factors for H.pylori infection were analyzed by using chi-square test and logistic regression. Results The H. pylori infection rate was 47.5% in recruits located in Hulunbuir pastureland, while it was 44.8% in recruits located in Ala Shan Desert. The H. pylori infection rate was higher in recruits from the West China and Central China, and higher in the recruits from the rural area than those from city (P

Background: The optimal operative process of esophageal endoscopic submucosal dissection (ESD), especially for the beginners, is not established. In this study, the clip-with-line method, the tunneling method and the conventional method for esophageal ESD were compared in a training course on live pigs. Methods: 15 trainee endoscopists were randomized into three groups, the clip-with-line method group, the tunneling method group, and the conventional method group. Each trainee performed four esophageal ESDs on live pigs with one of the specified methods, assisted by a senior endoscopist. The procedural time and speed, the en bloc resection rates, adverse events, and self-completion rates were recorded, and learning curves were drawn. Results: The procedural time in the clip-with-line group was significantly shorter than those in the tunneling and the conventional method group (47.4 ± 9.0 min versus 67.0 ± 15.1 min and 67.0 ± 11.8 min, p = 0.000). The clip-with-line method had the lowest rates of perforation and muscle layer injury among the three methods. The en bloc resection rates and self-completion rates were similar among the three groups. Learning curves analysis showed the clip-with-line method was the easiest one for the trainees to master. Conclusions: The clip-with-line method shortened procedural time for trainees, and was associated with lower rates of adverse events. This method is preferred for endoscopists in their learning periods for esophageal ESD.

Multiple colorectal polyps are relevant in hereditary colorectal cancer (CRC) syndromes, which are thought to be caused by multiple events including germline mutations. This study was aimed to characterize germline mutations in Chinese patients with multiple colorectal polyps.Patients with 10 colorectal polyps at the Department of Gastroenterology of the PLA Army General Hospital were enrolled from January 2014 to December 2015. These patients were divided into the high-risk, moderate-risk, and mild-risk groups. White blood cell samples were collected, and DNA was extracted to sequence a panel of 19 genes previously associated with CRC by next-generation sequencing.A total of 96 patients were enrolled in the study. Pathogenic germline mutations were found in 24 (24/33, 72.73%), nine (9/24, 37.5%), and three patients (3/39, 7.7%) in the high-risk, moderate-risk, and mild-risk groups, respectively. Based on the results given, we suggested a strategy about gene sequencing test for the patients with multiple polyps, and the sensitivity and specificity of the screening strategy were 97% and 57%, respectively. Four of eight patients with MUTYH pathogenic germline mutations had the c.A934-2G monoallelic germline mutation, whereas three of eight patients had the C55T MUTYH germline mutation. Concurrent pathogenic germline mutations in APC and MUTYH were also observed.A genetic screening strategy comprising 19 genes was effective to screen for hereditary CRC syndromes in patients with multiple colorectal polyps. The MUTYH germline mutation hotspots in Chinese patients may be different from those in Caucasian patients.

OBJECTIVE: The best cure for colorectal cancer (CRC) lies on its early diagnosis and treatment. We aimed to provide the epidemiological features of advanced colorectal adenoma (A-CRA) and CRC in symptomatic patients and to determine whether the incidences of A-CRA and CRC increased simultaneously in China between 1990 and 2009. METHODS: A total of 157 943 patients who had undergone a colonoscopy from 1990 to 2009 were enrolled, of which 6 777 patients had A-CRA and 3 503 had CRC. They were compared with controls in a stratified analysis. The detection rates of A-CRA and CRC in the 1990s and 2000s were also compared. RESULTS: The detection rate of A-CRA increased 1.88-fold over the two decades, while that of CRC increased 0.66-fold. The percentages of patients with A-CRA and CRC who were elder than 50 years were significantly higher in the 2000s than those in the 1990s (P = 0.000). The changes of location of A-CRA and CRC during the two decades indicated a shift of lesions from the distal colon to proximal colon. CONCLUSION: There was a significant increase in detection rate of A-CRA in the 2000s, but CRC did not increase at a similar speed. Our results indicated that the early detection and removal of colorectal adenoma in symptomatic patients might decrease the incidence of CRC.