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| 1 | Targeting the PI3K/Akt signaling pathway in gastric carcinoma: A reality for personalized medicine?显示文摘Frequent activation of phosphatidylinositol-3 kinases(PI3K)/Akt/m TOR signaling pathway in gastric cancer(GC) is gaining immense popularity with identification of mutations and/or amplifications of PIK3 CA gene or loss of function of PTEN,a tumor suppressor protein,to name a few; both playing a crucial role in regulating this pathway. These aberrations result in dysregulation of this pathway eventually leading to gastric oncogenesis,hence,there is a need for targeted therapy for more effective anticancer treatment. Several inhibitors are currently in either preclinical or clinical stages for treatment of solid tumors like GC. With so many inhibitors under development,further studies on predictive biomarkers are needed to measure the specificity of any therapeutic intervention. Herein,we review the common dysregulation of PI3K/Akt/m TOR pathway in GC and the various types of single or dual pathway inhibitors under development that might have a superior role in GC treatment. We also summarize the recent developments in identification of predictive biomarkers and propose use of predictive biomarkers to facilitate more personalized cancer therapy with effective PI3K/Akt/m TOR pathway inhibition. | Shikha Satendra Singh Wei Ney Yap Frank Arfuso Shreya Kar Chao Wang Wanpei Cai Arunasalam M Dharmarajan Gautam Sethi Alan Prem Kumar | 2015 | World Journal of Gastroenterology2015，21，43： | 36 |
| 2 | 急性下呼吸道感染儿童的维生素D摄入显示文摘目的明确维生素D(Vit D)摄入是否与儿童急性下呼吸道感染(ALRI)相关。方法比较因毛细支气管炎或肺炎入院的5岁以下儿童和非配对、无呼吸道感染的同龄对照组儿童之间Vit D摄入的差别。197例儿童的看护人完成了问卷调查,内容包括人口统计变量、ALRI危险因素和饮食。评估ALRI与Vit D摄入及其他危险因素的相关性。结果 ALRI组儿童的平均Vit D摄入为每日48 IU/kg,对照组为每日60 IU/kg。当控制年龄、民族、社会经济地位、北部地区居住、母乳喂养、免疫接种和接触吸烟等因素时,Vit D每日摄入<80 IU/kg的儿童患ALRI的可能性比每日摄入≥80 IU/kg的儿童高4倍(OR=4.9;95%CI:1.5~16.4)。结论为了避免罹患ALRI等疾病,5岁以下儿童可能需要摄入比现在推荐量更高的Vit D剂量。因毛细支气管炎和肺炎是年幼儿童住院的最常见原因,增加Vit D的补充可能有重要的公共卫生保健意义。 | Karen S Leis J Dayre McNally Matthew R Montgomery Koravangattu Sankaran Chandima Karunanayake Alan M Rosenberg 马丽亚(译) | 2012 | 中国当代儿科杂志2012，14，1： | 25 |
| 3 | Systematic review and meta-analysis of colon cleansing preparations in patients with inflammatory bowel disease显示文摘AIM To performed a systematic review and meta-analysis to determine any possible differences in terms of effectiveness, safety and tolerability between existing colon-cleansing products in patients with inflammatory bowel disease.METHODS Systematic searches were performed( January 1980-September 2016) using MEDLINE, EMBASE, Scopus, CENTRAL and ISI Web of knowledge for randomized trials assessing preparations with or without adjuvants, given in split and non-split dosing, and in high(> 3 L) or low-volume(2 L or less) regimens. Bowel cleansing quality was the primary outcome. Secondary outcomes included patient willingness-torepeat the procedure and side effects/complications.RESULTS Out of 439 citations, 4 trials fulfilled our inclusion criteria(n = 449 patients). One trial assessed the impact of adding simethicone to polyethylene glycol(PEG) 4 L with no effect on bowel cleansing quality, but a better tolerance. Another trial compared senna to castor oil, again without any differences in term of bowel cleansing. Two trials compared the efficacy of PEG high-volume vs PEG low-volume associated to an adjuvant in split-dose regimens: PEG low-dose efficacy was not different to PEG high-dose; OR = 0.84(0.37-1.92). A higher proportion of patients were willing to repeat low-volume preparations vs high-volume; OR = 5.11(1.31-20.0). CONCLUSION In inflammatory bowel disease population, PEG lowvolume regimen seems not inferior to PEG high-volume to clean the colon, and yields improved willingness-torepeat. Further additional research is urgently required to compare contemporary products in this population. | Sophie Restellini Omar Kherad Talat Bessissow Charles Ménard Myriam Martel Maryam Taheri Tanjani Peter L Lakatos Alan N Barkun | 2017 | World Journal of Gastroenterology2017，23，32： | 16 |
| 4 | β-甘露聚糖酶的产酶菌种、条件及部分性质研究显示文摘利用刚果红平板筛选法从芽孢杆菌属中筛选到 1株产 β 甘露聚糖酶的理想菌株 ,即枯草杆菌 (Bacillussub tilis)NCIMB 110 34.该菌产酶条件以槐豆胶或魔芋胶作为碳源、以酵母抽提物作为氮源、2 5℃培养 2 7h为宜 .该酶最适作用温度 6 0℃ ,最适作用pH 5 .4,6 0℃保温 3h酶活性不损失 。 | 杨幼慧 Alan M McKAY | 2001 | 华南农业大学学报2001，22，2： | 15 |
| 5 | Validation of the Rockall scoring system for outcomes from non-variceal upper gastrointestinal bleeding in a Canadian setting显示文摘AIM: To validate the Rockall scoring system for predicting outcomes of rebleeding, and the need for a surgical procedure and death. METHODS: We used data extracted from the Registry of Upper Gastrointestinal Bleeding and Endoscopy including information of 1869 patients with non-variceal upper gastrointestinal bleeding treated in Canadian hospitals. Risk scores were calculated and used to classify patients based on outcomes. For each outcome, we used χ2 goodness-of-fit tests to assess the degree of calibration, and built receiver operating characteristic curves and calculated the area under the curve (AUC) to evaluate the discriminative ability of the scoring system. RESULTS: For rebleeding, the χ2 goodness-of-fit test indicated an acceptable fit for the model [χ2 (8) = 12.83, P = 0.12]. For surgical procedures [χ2 (8) = 5.3, P = 0.73] and death [χ2 (8) = 3.78, P = 0.88], the tests showed solid correspondence between observed proportions and predicted probabilities. The AUC was 0.59 (95% CI: 0.55-0.62) for the outcome of rebleeding and 0.60 (95% CI: 0.54-0.67) for surgical procedures, representing apoor discriminative ability of the scoring system. For the outcome of death, the AUC was 0.73 (95% CI: 0.69-0.78), indicating an acceptable discriminative ability. CONCLUSION: The Rockall scoring system provides an acceptable tool to predict death, but performs poorly for endpoints of rebleeding and surgical procedures. | Robert A Enns Yves M Gagnon Alan N Barkun David Armstrong Jamie C Gregor Richard N Fedorak RUGBE Investigators Group | 2006 | World Journal of Gastroenterology2006，12，48： | 14 |
| 6 | Factors associated with time to laparoscopic cholecystectomy for acute cholecystitis显示文摘AIM: To determine patient and process of care factors associated with performance of timely laparoscopic cholecystectomy for acute cholecystitis. METHODS: A retrospective medical record review of 88 consecutive patients with acute cholecystitis was conducted. Data collected included demographic data, co-morbidities, symptoms and physical findings at presentation, laboratory and radiological investigations, length of stay, complications, and admission service (medical or surgical). Patients not undergoing cholecystectomy during this hospitalization were excluded from analysis. Hierarchical generalized linear models were constructed to assess the association of pre-operative diagnostic procedures, presenting signs, and admitting service with time to surgery.RESULTS: Seventy cases met inclusion and exclusion criteria, among which 12 were admitted to the medical service and 58 to the surgical service. Mean ± SD time to surgery was 39.3 ± 43 h, with 87% of operations performed within 72 h of hospital arrival. In the adjusted models, longer time to surgery was associated with number of diagnostic studies and endoscopic retrograde cholangio-pancreatography (ERCP, P = 0.01) as well with admission to medical service without adjustment for ERCP (P < 0.05). Patients undergoing both magnetic resonance cholangiopancreatography (MRCP) and computed tomography (CT) scans experienced the longest waits for surgery. Patients admitted to the surgical versus medical service underwent surgery earlier (30.4 ± 34.9 vs 82.7 ± 55.1 h, P < 0.01), had less post-operative complications (12% vs 58%, P < 0.01), and shorter length of stay (4.3 ± 3.4 vs 8.1 ± 5.2 d, P < 0.01).CONCLUSION: Admission to the medical service and performance of numerous diagnostic procedures, ERCP, or MRCP combined with CT scan were associated with longer time to surgery. Expeditious performance of ERCP and MRCP and admission of medically stable patients with suspected cholecystitis to the surgical service to speed up time to surgery should be considered. | Chris N Daniak David Peretz Jonathan M Fine Yun Wang Alan K Meinke William B Hale | 2008 | World Journal of Gastroenterology2008，14，7： | 13 |
| 7 | Evolution and advances in laparoscopic ventral and incisional hernia repair显示文摘Primary ventral hernias and ventral incisional hernias have been a challenge for surgeons throughout the ages. In the current era, incisional hernias have increased in prevalence due to the very high number of laparotomies performed in the 20 th century. Even though minimally invasive surgery and hernia repair have evolved rapidly, general surgeons have yet to develop the ideal, standardized method that adequately decreases common postoperative complications, such as wound failure, hernia recurrence and pain. The evolution of laparoscopy and ventral hernia repair will be reviewed, from the rectoscopy of the 4th century to the advent of laparoscopy, from suture repair to the evolution of mesh reinforcement. The nuances of minimally invasive ventral and incisional hernia repair will be summarized, from preoperative considerations to variations in intraoperative practice. New techniques have become increasingly popular, such as primary defect closure, retrorectus mesh placement, and concomitant component separation. The advent of robotics has made some of these repairs more feasible, but only time and well-designed clinical studies will tell if this will be a durable modality for ventral and incisional hernia repair. | Alan L Vorst Christodoulos Kaoutzanis Alfredo M Carbonell Michael G Franz | 2015 | World Journal of Gastrointestinal Surgery2015，7，11： | 10 |
| 8 | Response to endoscopic therapy for biliary anastomotic strictures in deceased versus living donor liver transplantation显示文摘BACKGROUND:Endoscopic therapy has been successful in the management of biliary complications after both deceased donor liver transplantation(DDLT) and living donor liver transplantation(LDLT).LDLT is thought to be associated with higher rates of biliary complications,but there are few studies comparing the success of endoscopic management of anastomotic strictures between the two groups.This study aims to compare our experience in the endoscopic management of anastomotic strictures in DDLT versus LDLT.METHODS:This is a retrospective database review of all liver transplant patients undergoing endoscopic retrograde cholangiopancreatography(ERCP) after liver transplantation.The frequency of anastomotic stricture and the time to develop and to resolve anastomotic stricture were compared between DDLT and LDLT.The response of anastomotic stricture to endoscopic therapy was also analyzed.RESULTS:A total of 362 patients underwent liver transplantation between 2003 and 2011,with 125 requiring ERCP to manage biliary complications.Thirty-three(9.9%) cases of DDLT and 8(27.6%) of LDLT(P=0.01) were found to have anastomotic stricture.When comparing DDLT and LDLT,there was no difference in the mean time to the development of anastomotic strictures(98±17 vs 172±65 days,P=0.11),likelihood of response to ERCP [22(66.7%) vs 6(75.0%),P=0.69],mean time to the resolution of anastomotic strictures(268±77 vs 125±37 days,P=0.34),and the number of ERCPs required to achieve resolution(3.9±0.4 vs 4.7±0.9,P=0.38).CONCLUSIONS:Endoscopic therapy is effective in the majority of biliary complications relating to liver transplantation.Anastomotic strictures occur more frequently in LDLT compared with DDLT,with equivalent endoscopic treatment response and outcomes for both groups. | Calvin HY Chan Fergal Donnellan Michael F Byrne Alan Coss Mazhar Haque Holly Wiesenger Charles H Scudamore Urs P Steinbrecher Alan A Weiss Eric M Yoshida | 2013 | Hepatobiliary & Pancreatic Diseases International2013，12，5： | 7 |
| 9 | Standard forward-viewing colonoscopy versus full-spectrum endoscopy: an international, multicentre, randomised, tandem colonoscopy trial显示文摘 | Ian M Gralnek Peter D Siersema Zamir Halpern Ori Segol Alaa Melhem Alain Suissa Erwin Santo Alan Sloyer Jay Fenster Leon M G Moons Vincent K Dik Ralph B D’Agostino Douglas K Rex | 2014 | Lancet Oncology2014，，3： | 6 |
| 10 | Quantitative analysis of ruminal methanogenic microbial populations in beef cattle divergent in phenotypic residual feed intake(RFI)offered contrasting diets显示文摘Background:Methane(CH_4) emissions in cattle are an undesirable end product of rumen methanogenic fermentative activity as they are associated not only with negative environmental impacts but also with reduced host feed efficiency.The aim of this study was to quantify total and specific rumen microbial methanogenic populations in beef cattle divergently selected for residual feed intake(RFI) while offered(i) a low energy high forage(HF) diet followed by(ii) a high energy low forage(LF) diet.Ruminal fluid was collected from 14 high(H)and 14 low(L) RFI animals across both dietary periods.Quantitative real time PCR(qRT-PCR) analysis was conducted to quantify the abundance of total and specific rumen methanogenic microbes.Spearman correlation analysis was used to investigate the association between the relative abundance of methanogens and animal performance,rumen fermentation variables and diet digestibility.Results:Abundance of methanogens,did not differ between RFI phenotypes.However,relative abundance of total and specific methanogen species was affected(P< 0.05) by diet type,with greater abundance observed while animals were offered the LF compared to the HF diet.Conclusions:These findings suggest that differences in abundance of specific rumen methanogen species may not contribute to variation in CH_4 emissions between efficient and inefficient animals,however dietary manipulation can influence the abundance of total and specific methanogen species. | Ciara A Carberry David A Kenny Alan K Kelly Sinead M Waters | 2014 | Journal of Animal Science and Biotechnology2014，5，4： | 6 |
| 11 | Randomized trial in malignant biliary obstruction:Plastic vs partially covered metal stents显示文摘AIM:To compare efficacy and complications of par-tially covered self-expandable metal stent(pcSEMS)to plastic stent(PS)in patients treated for malignant,infrahilar biliary obstruction.METHODS:Multicenter prospective randomized clinical trial with treatment allocation to a pcWallstent(SEMS)or a 10 French PS.Palliative patients aged≥18,for infrahilar malignant biliary obstruction and a Karnofsky performance scale index>60%from 6 participating North American university centers.Primary endpoint was time to stent failure,with secondary outcomes of death,adverse events,Karnofsky performance score and short-form-36 scale administered on a three-monthly basis for up to 2 years.Survival analyses were performed for stent failure and death,with Cox proportional hazards regression models to determine significant predictive characteristics.RESULTS:Eighty-five patients were accrued over 37mo,42 were randomized to the SEMS group and 83patients were available for analyses.Time to stent failure was 385.3±52.5 d in the SEMS and 153.3±19.8 d in the PS group,P=0.006.Time to death did not differ between groups(192.3±23.4 d for SEMS vs211.5±28.0 d for PS,P=0.70).The only significant predictor was treatment allocation,relating to the time to stent failure(P=0.01).Amongst other measured outcomes,only cholangitis differed,being more common in the PS group(4.9%vs 24.5%,P=0.029).The small number of patients in follow-up limits longitudinal assessments of performance and quality of life.From an initially planned 120 patients,only 85 patients were recruited.CONCLUSION:Partially covered SEMS result in a longer duration till stent failure without increased complication rates,yet without accompanying measurable benefits in survival,performance,or quality of life. | Peter L Moses Khalid M AlNaamani Alan N Barkun Stuart R Gordon Roger D Mitty M Stanley Branch Thomas E Kowalski Myriam Martel Viviane Adam | 2013 | World Journal of Gastroenterology2013，19，46： | 6 |
| 12 | Nutritional modulation of the inflammatory response in inflammatory bowel disease-From the molecular to the integrative to the clinical显示文摘Nutrient deficiencies are common in patients with inflammatory bowel disease (IBD). Both total parenteral and enteral nutrition provide important supportive therapy for IBD patients, but in adults these are not useful for primary therapy. Dietary intervention with omega-3 polyunsaturated fatty acids contained in fish oil may be useful for the care of IBD patients, and recent studies have stressed the role of PPAR on NFκB activity on the potential beneficial effect of dietary lipids on intestinal function. | Gary E Wild Laurie Drozdowski Carmela Tartaglia M Tom Clandinin Alan BR Thomson | 2007 | World Journal of Gastroenterology2007，13，1： | 6 |
| 13 | 利拉鲁肽与格列美脲在单药治疗2型糖尿病中的比较(LEAD-3 Mono):一项随机、双盲、平行分组、52周的Ⅲ期临床试验显示文摘背景 2型糖尿病新的治疗策略,需要针对胰岛素-葡萄糖的相互作用,且同时要降低体重增加和发生低血糖的风险。本文作者旨在调查利拉鲁肽单药治疗2型糖尿病的安全性与有效性。
方法 采用双盲、双模拟、治疗一对照、平行分组的研究,746例早期2型糖尿病患者被随机分配到1次/d利拉鲁肽组[1.2mg(n=251)或1.8mg(n=247)]或格列美脲8mg组(n=248),分别治疗52周。主要结局指标为糖化血红蛋白(HbA1c)的改变程度。采用意向性治疗进行分析。该试验在ClinicalTrials.gov网站的注册编码为NTC00294723.
结果52周时,格列美脲组HbA,。下降了0.51%(s=1.20),而利拉鲁肽1.2mg组下降了0.84%(s=1.23)(差值为-0.33.95%CI-0.53~-0.13;P=0.0014),利拉鲁肽1.8mg组下降了1.14%(S=1.24)(差值为-062,95%CI-0.83—-0.42;P〈0.0001)。利拉鲁肽1.2mg组和1.8mg组各有5例和1例患者因呕吐停止治疗,而格列美脲组未出现这种情况。
结论 利拉鲁肽作为2型糖尿病的初始治疗药物安全有效,与格列美脲相比更能降低HbA1c以及体重、血压和低血糖的发生率。 | Alan Garber Robert Henry Robert Rather Pedro A Garcia-Hernandez Hiromi Rodriguez-Pattzi Israel Olvero-Alvarez Paula M Hale, Milan Zdravkovic Bruce Bode 邓斌(译) | 2009 | 世界临床医学2009，，6： | 5 |
| 14 | Continuous wound infusion of local anaesthetic agents following colorectal surgery:Systematic review and meta-analysis显示文摘AIM:To provide a specifi c review and meta-analysis of the available evidence for continuous wound infusion of local anaesthetic agents following midline laparoto-my for major colorectal surgery. METHODS: Medline, Embase, trial registries, conference proceedings and article reference lists were searched to identify randomised, controlled trials of continuous wound infusion of local anaesthetic agents following colorectal surgery. The primary outcomes were opioid consumption, pain visual analogue scores (VASs), return to bowel function and length of hospital stay. Weighted mean difference were calculated for continuous outcomes. RESULTS: Five trials containing 542 laparotomy wounds were eligible for inclusion. There was a sig- nificant decrease in post-operative pain VAS at rest on day 3 (weighted mean difference: -0.43; 95% CI: -0.81 to -0.04; P = 0.03) but not on post-operative day 1 and 2. Local anaesthetic infusion was associated with a signifi cant reduction in pain VAS on movement on all three post-operative days (day 1 weighted mean difference: -1.14; 95% CI: -2.24 to -0.041; P = 0.04, day 2 weighted mean difference: -0.97, 95% CI: -1.91to -0.029; P = 0.04, day 3 weighted mean difference: -0.61; 95% CI: 1.01 to -0.20; P = 0.0038). Local an- aesthetic wound infusion was associated with a signifi - cant decrease in total opioid consumption (weighted mean difference: -40.13; 95% CI: -76.74 to -3.53; P = 0.03). There was no signifi cant decrease in length of stay (weighted mean difference: -20.87; 95% CI: -46.96 to 5.21; P = 0.12) or return of bowel function (weighted mean difference: -9.40; 95% CI: -33.98 to 15.17; P = 0.45). CONCLUSION: The results of this systematic re- view and meta-analysis suggest that local anaesthetic wound infusion following laparotomy for major color- ectal surgery is a promising technique but do not pro- vide conclusive evidence of benefi t. Further research is required including cost-effectiveness analysis. | Alan Karthikesalingam Stewart R Walsh Sheraz R Markar Umar Sadat Tjun Y Tang Charles M Malata | 2008 | World Journal of Gastroenterology2008，14，34： | 4 |
| 15 | 外周炎症性疼痛刺激诱发中枢神经系统小胶质细胞增殖活化显示文摘目的 观察外周疼痛刺激后 ,中枢神经系统小胶质细胞形态和功能特征的变化。方法 采用福尔马林疼痛动物模型 ,刺激后 2、4、8h,1、3 d,1、2及 4周后处死 ,制成腰脊髓和脑干切片。小胶质细胞特异表达补体 C3受体(单克隆抗体 OX-4 2 ) ,活化型小胶质细胞表达 类主要组织相容性复合物 Ia(单克隆抗体 OX-6)。定性和定量的免疫组化方法显示中枢小胶质细胞及疼痛刺激下形态的转化。结果 福尔马林刺激侧腰脊髓后角和脑干薄束核内小胶质细胞的增殖活化 ,注射后 1 d开始出现 ,3 d后明显 ,1周达到高峰 ,2周后增殖活化反应开始消退。本研究增殖活化的小胶质细胞表现为激活型 ,而非活化型或吞噬型。结论 福尔马林注射引起的疼痛刺激或外周炎症反应可能诱发中枢小胶质细胞增殖活化。 | 傅开元 Alan R.Ligh t William M aixner | 2001 | 中国神经免疫学和神经病学杂志2001，8，3： | 4 |
| 16 | 新加坡成人慢性呼吸系统疾病患者6分钟步行距离的最小临床重要差异值研究(英文)显示文摘目的:6 min步行距离(6MWD)是临床上常见的功能性运动能力测试,特别是对于慢性呼吸系统疾病患者。一些文献记载了关于白种人的6MWD的最小临床重要差异(MCID),但对亚洲人群的相关信息未见记载。本研究旨在建立亚洲成人慢性呼吸道疾病患者6MWD的最小临床重要差异。方法:采用'锚定'法和'分布'法对新加坡中央医院肺康复计划登记处的资料进行了分析。'锚定'法收集确诊为慢性呼吸道疾病的患者50例,其中男38例,女12例;平均年龄(64.2±12.3)岁,通过电话采访及使用整体变化评估量表(GROC)评价患者肺康复计划后的自觉改善程度,再将患者在肺康复计划中6MWD的改变数值与相对应的患者自觉改善程度进行比较,这种关系用操作特征曲线(ROC)统计表示。通过'分布'法确定6MWD的MCID,从门诊和住院的肺康复计划(PRP)参与者中检索医疗记录136例,其中男103例,女33例;平均年龄(60.1±14.1)岁。结果 :ROC曲线表明6MWD出现临床显著性变化的最佳临界值为17.4 m,其对应的敏感性为79.4%,特异性为81.3%,阳性似然比为4.23。由'分布'法确定6MWD的最小临床重要差异值为18.6 m。结论:18.6 m为新加坡华人6MWD的最小临床重要差异的估计值。 | Meredith T L YEUNG Alan W P WONG Katherine S L HUANG Alice Y M JONES | 2015 | 康复学报2015，25，1： | 3 |
| 17 | International Consensus Statement on surveillance and management of dysplasia in inflammatory bowel disease显示文摘 | Loren Laine Tonya Kaltenbach Alan Barkun Kenneth R. McQuaid Venkataraman Subramanian Roy Soetikno James E. East Francis A. Farraye Brian Feagan John Ioannidis Ralf Kiesslich Michael Krier Takayuki Matsumoto Robert P. McCabe Klaus M?nkemüller Robert Odze M | 2014 | Gastrointestinal Endoscopy2014，，： | 3 |
| 18 | Increased catabolism and decreased unsaturation of ganglioside in patients with inflammatory bowel disease显示文摘AIM: To investigate whether accelerated catabolism of ganglioside and decreased ganglioside content contribute to the etiology of pro-inflammatory intestinal disease. METHODS: Intestinal mucosa from terminal ileum or colon was obtained from patients with ulcerative colitis or inflammatory Crohn's disease(n = 11) undergoing bowel resection and compared to control samples of normal intestine from patients with benign colon polyps(n = 6) and colorectal cancer(n = 12) in this observational case-control study. Gangliosides and phospholipids of intestinal mucosa were characterized by class and ceramide or fatty acid composition using liquid chromatography triple-quad mass spectrometry. Content and composition of ganglioside classes GM1, GM3, GD3, GD1 a, GT1 and GT3 were compared among subject groups. Content and composition of phospholipid classes phosphatidylcholine(PC) and phosphatidylethanolamine were compared among subject groups. Unsaturation index of individual ganglioside and phospholipid classes was computed and compared among subject groups. Ganglioside catabolism enzymes beta-hexosaminidase A(HEXA) and sialidase-3(NEU3) were measured in intestinal mucosa using western blot and compared among subject groups. RESULTS: Relative GM3 ganglioside content was 2-fold higher(P < 0.05) in intestine from patients with inflammatory bowel disease(IBD) compared to control intestine. The quantity of GM3 and ratio of GM3/GD3 was also higher in IBD intestine than control tissue(P < 0.05). Control intestine exhibited 3-fold higher(P < 0.01) relative GD1 a ganglioside content than IBD intestine. GD3 and GD1 a species of ganglioside containing three unsaturated bonds were present in control intestine, but were not detected in IBD intestine. The relative content of PC containing more than two unsaturated bonds was 30% lower in IBD intestine than control intestine(P < 0.05). The relative content of HEXA in IBD intestine was increased 1.7-fold(P < 0.05) and NEU3 was increased 8.3-fold(P < 0.01) compared to normal intestine. Intestinal mucosa in IBD is characterized by increased GM3 content, decreased GD1 a, and a reduction in polyunsaturated fatty acid constituents in GD3, GD1 a and PC.CONCLUSION: This study suggests a new paradigm by proposing that IBD occurs as a consequence of increased metabolism of specific gangliosides. | John J Miklavcic Glen K Shoemaker Vera C Mazurak M Tom Clandinin Tasha DL Hart Kareena L Schnabl Gordon M Lees Bodil MK Larsen Oliver F Bathe Alan BR Thomson M Tom Clandinin | 2015 | World Journal of Gastroenterology2015，21，35： | 3 |
| 19 | Radiation exposure from CT scans in childhood and subsequent risk of leukaemia and brain tumours: a retrospective cohort study显示文摘 | Mark S Pearce Jane A Salotti Mark P Little Kieran McHugh Choonsik Lee Kwang Pyo Kim Nicola L Howe Cecile M Ronckers Preetha Rajaraman Alan W Craft Louise Parker Amy Berrington de González | 2012 | The Lancet . 2012 (9840)2012，，： | 3 |
| 20 | Diagnostic accuracy of tests for Helicobacter pylori in an Alaska Native population显示文摘AIM:To evaluate the accuracy of two non-invasivetests in a population of Alaska Native persons. Highrates of Helico bacter pylori(H. pylori) infection,H. pylori treatment failure,and gastric cancer in this population necessitate documentation of infection status atmultiple time points over a patient's life.METHODS:In 280 patients undergoing endoscopy,H. pylori was diagnosed by culture,histology,rapidurease test,13C urea breath test(UBT) ,and immuno-globulin G antibodies to H. pylori in serum. The performances of 13C-UBT and antibody test were compared to a gold standard defined by a positive H. pylori testby culture or,in case of a negative culture result,bypositive histology and a positive rapid urease test.RESULTS:The sensitivity and specificity of the 13C-UBT were 93% and 88%,respectively,relative to thegold standard. The antibody test had an equivalents ensitivity of 93% with a reduced specificity of 68%.The false positive results for the antibody test were as-sociated with previous treatment for an H. pylori infection [relative risk(RR) = 2.8]. High levels of antibodiesto H. pylori were associated with chronic gastritis and male gender,while high scores in the 13C-UBT testwere associated with older age and with the H. pyloribacteria load on histological examination(RR = 4.4) .CONCLUSION:The 13C-UBT out performed the anti-body test for H. pylori and could be used when a non-invasive test is clinically necessary to document treatment out come or when monitoring for reinfection. | Dana L Bruden Michael G Bruce Karen M Miernyk Julie Morris Debby Hurlburt Thomas W Hennessy Helen Peters Frank Sacco Alan J Parkinson Brian J McMahon | 2011 | World Journal of Gastroenterology2011，17，42： | 3 |
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