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https://www.readbyqxmd.com/read/28225314/the-prevalence-of-colonic-polyps-in-patients-with-acromegaly-a-case-control-nested-in-a-cohort-colonoscopic-study
#1
Baldomero Gonzalez, Guadalupe Vargas, Victoria Mendoza, Mariana Nava, Moisés Rojas, Moisés Mercado
BACKGROUND: Acromegaly is associated with an increased risk of colonic polyps. The magnitude of such risk is controversial and the characteristics that distinguish patients who develop polyps from those who do not are not well established. OBJECTIVE: To determine the prevalence of colonic polyps upon the diagnosis of acromegaly. To compare the clinical and biochemical features of patients with and without polyps Patients and methods: Out of 165 patients who underwent a full colonoscopy upon diagnosis of acromegaly, 53 were found to harbor colonic lesions (cases), whereas the remaining 112 conformed the group of controls...
February 22, 2017: Endocrine Practice
https://www.readbyqxmd.com/read/28220297/what-roles-do-colon-stem-cells-and-gap-junctions-play-in-the-left-and-right-location-of-origin-of-colorectal-cancers
#2
James E Trosko, Heinz-Josef Lenz
This "Commentary" examines an important clinical observation that right-sided colorectal cancers appear less treatable than the left-sided cancers. The concepts of (a) the "initiation/promotion/progression" process, (b) the stem cell hypothesis, (c) the role gap junctional intercellular communication, (d) cancer cells lacking GJIC either because of the non-expression of connexin genes or of non-functional gap junction proteins, and (e) the role of the microbiome in promoting initiated colon stem cells to divide symmetrically or asymmetrically are examined to find an explanation...
February 20, 2017: Journal of Cell Communication and Signaling
https://www.readbyqxmd.com/read/28216437/extracellular-eosinophilic-traps-in-association-with-staphylococcus-aureus-at-the-site-of-epithelial-barrier-defects-in-severe-airway-inflammation
#3
Elien Gevaert, Nan Zhang, Olga Krysko, Feng Lan, Gabriële Holtappels, Natalie De Ruyck, Hans Nauwynck, Shida Yousefi, Hans-Uwe Simon, Claus Bachert
BACKGROUND: Chronic rhinosinusitis with nasal polyps (CRSwNP) is characterized by a Th2-biased eosinophilic inflammation. Eosinophils have been shown to generate so-called extracellular eosinophilic traps (EETs) under similar pathological conditions. OBJECTIVE: Our aim was to investigate a possible link between EET formation and the presence of Staphylococcus aureus, an organism frequently colonizing the upper airways, at the human mucosal site of the disease. METHODS: Tissue slides were investigated for the presence of EETs and S...
February 16, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28209102/diverticulitis-in-the-young-population%C3%A2-reconsidering-conventional-recommendations
#4
U Syed, R Companioni, R Bansal, H Alkhawam, A Walfish
BACKGROUND: In the past diverticulitis was believed to be uncommon in the young population. However, there is growing concern suggesting that these patients develop more severe clinical symptoms and may require more frequent intervention. METHOD: We performed a retrospective chart review of patients with diverticulitis in individuals with age less than 40 years over an 8 year period (2007-2015). Diagnosis was confirmed with a CT scan. In addition to age we took into consideration race, gender, anemia (hematocrit< 41), leukocytosis (WBC > 12), BMI and whether it was an initial episode or recurrence...
July 2016: Acta Gastro-enterologica Belgica
https://www.readbyqxmd.com/read/28197615/dietary-polyacetylenes-falcarinol-and-falcarindiol-isolated-from-carrots-prevents-the-formation-of-neoplastic-lesions-in-the-colon-of-azoxymethane-induced-rats
#5
Morten Kobaek-Larsen, Rime B El-Houri, Lars P Christensen, Issam Al-Najami, Xavier Fretté, Gunnar Baatrup
Falcarinol (FaOH) and falcarindiol (FaDOH) are found in many food plants of the Apiaceae family. Carrots are a major dietary source of these polyacetylenes. Feeding azoxymethane (AOM)-induced rats with carrots and purified FaOH have previously been shown to inhibit neoplastic transformations in the colon. FaOH and FaDOH have also shown to have a synergistic effect in vitro, resulting in a significant increased cytotoxic activity. Based on these findings the antineoplastic effect of FaOH and FaDOH (purity > 99%) was investigated in the AOM-induced rat model...
February 15, 2017: Food & Function
https://www.readbyqxmd.com/read/28197371/prophylactic-vaccination-targeting-erbb3-decreases-polyp-burden-in-a-mouse-model-of-human-colorectal-cancer
#6
David J Bautz, Ang T Sherpa, David W Threadgill
Prophylactic vaccination is typically utilized for the prevention of communicable diseases such as measles and influenza but, with the exception of vaccines to prevent cervical cancer, is not widely used as a means of preventing or reducing the incidence of cancer. Here, we utilize a peptide-based immunotherapeutic approach targeting ERBB3, a pseudo-kinase member of the EGFR/ERBB family of receptor tyrosine kinases, as a means of preventing occurrence of colon polyps. Administration of the peptide resulted in a significant decrease in the development of intestinal polyps in C57BL/6J-Apc(Min) mice, a model of familial adenomatous polyposis (FAP)...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28193521/pharmacological-inhibition-of-magl-lipase-attenuates-experimental-colon-carcinogenesis
#7
Ester Pagano, Francesca Borrelli, Pierangelo Orlando, Barbara Romano, Martina Monti, Lucia Morbidelli, Gabriella Aviello, Roberta Imperatore, Raffaele Capasso, Fabiana Piscitelli, Lorena Buono, Vincenzo Di Marzo, Angelo A Izzo
Colorectal cancer (CRC) is a major health problem in Western countries. The endocannabinoid 2-arachidonoyl-glycerol (2-AG) exerts antiproliferative actions in a number of tumoral cell lines, including CRC cells. Monoacylglycerol lipase (MAGL), a serine hydrolase that inactivates 2-AG, is highly expressed in aggressive human cancer cells. Here, we investigated the role of MAGL in experimental colon carcinogenesis. The role of MAGL was assessed in vivo by using the xenograft and the azoxymethane models of colon carcinogenesis; MAGL expression was evaluated by RT-PCR and immunohistochemistry; 2-AG levels were measured by liquid chromatography mass spectrometry; angiogenesis was evaluated in tumor tissues [by microvessel counting and by investigating the expression of vascular endothelial growth factor (VEGF) and fibroblast growth factor-2 (FGF-2) proteins] as well as in human umbilical vein endothelial cells (HUVEC); cyclin D1 was evaluated by RT-PCR...
February 10, 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/28192107/gastrointestinal-complications-of-obesity
#8
Michael Camilleri, Harmeet Malhi, Andres Acosta
Obesity is usually associated with morbidity related to diabetes mellitus and cardiovascular diseases. However, there are many gastrointestinal and hepatic diseases for which obesity is the direct cause [e.g. non-alcoholic fatty liver diseases (NAFLD)] or is a significant risk factor, such as reflux esophagitis and gallstones. When obesity is a risk factor, it may interact with other mechanisms and result in earlier presentation or complicated diseases. There are increased odds ratios or relative risks of several gastrointestinal complications of obesity: gastroesophageal reflux disease (GERD), erosive esophagitis, Barrett's esophagus, esophageal adenocarcinoma, erosive gastritis, gastric cancer, diarrhea, colonic diverticular disease, polyps, cancer, liver disease including NAFLD, cirrhosis, hepatocellular carcinoma, gallstones, acute pancreatitis, and pancreatic cancer...
February 9, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28186354/feasibility-of-cyfra-21-1-as-a-serum-biomarker-for-the-detection-of-colorectal-adenoma-and-advanced-colorectal-adenoma-in-people-over-the-age-of-45
#9
Do Hyoung Lim, Jai Hyuen Lee, Jong Wan Kim
BACKGROUND: Colon adenoma (CA) is a premalignant lesion of colorectal cancer, and its early removal is closely associated with more prolonged survival in the general population. In this study, we aimed to evaluate the relationship between diverse biologic markers and a newly diagnosed CA and to predict the clinical possibility of cytokeratin-19 soluble in serum fragment (CYFRA 21-1) as a screening tool in asymptomatic adults aged over 45 years. METHODS: Four hundred and seventy-nine patients with a histologically confirmed CA or benign colon polyp (BCP), 76 patients with only benign colorectal diseases and 223 negative controls with no CA or BCP detected on colonofibroscopy were investigated...
February 10, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28183158/colonic-postpolypectomy-bleeding-is-related-to-polyp-size-and-heparin-use
#10
Flavia Pigò, Helga Bertani, Mauro Manno, Vincenzo Giorgio Mirante, Angelo Caruso, Santi Mangiafico, Raffaele Manta, Anna Maria Rebecchi, Rita Luisa Conigliaro
Background/Aims: We studied factors influencing colon postpolypectomy bleeding (PPB), with a focus on antithrombotic and anticoagulation therapy. Methods: We conducted a retrospective case-control study of all patients who underwent polypectomy at our tertiary referral center in Italy between 2007 and 2014. Polyp characteristics (number of polyps removed per patient, size, morphology, location, resection technique, prophylactic hemostasis methods) and patient characteristics (age, sex, comorbidities, medication) were analyzed...
February 9, 2017: Clinical Endoscopy
https://www.readbyqxmd.com/read/28182555/comparative-validation-of-polyp-detection-methods-in-video-colonoscopy-results-from-the-miccai-2015-endoscopic-vision-challenge
#11
Jorge Bernal, Nima Tajbakhsh, F Javier Sanchez, Bogdan J Matuszewski, Hao Chen, Lequan Yu, Quentin Angermann, Olivier Romain, Bjorn Rustad, Ilangko Balasingham, Konstantin Pogorelov, Sungbin Choi, Quentin Debard, L Maier-Hein, Stefanie Speidel, Danail Stoyanov, Patrick Brandao, Henry Cordova, Cristina Sanchez-Montes, Suryakanth R Gurudu, Gloria Fernandez-Esparrach, Xavier Dray, Jianming Liang, Aymeric Histace
Colonoscopy is the gold standard for colon cancer screening though still some polyps are missed, thus preventing early disease detection and treatment. Several computational systems have been proposed to assist polyp detection during colonoscopy but so far without consistent evaluation. The lack of publicly available annotated databases has made it difficult to compare methods and to assess if they achieve performance levels acceptable for clinical use. The Automatic Polyp Detection subchallenge, conducted as part of the Endoscopic Vision Challenge (http://endovis...
February 2, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28179979/flexible-gastro-intestinal-endoscopy-clinical-challenges-and-technical-achievements
#12
REVIEW
Niehls Kurniawan, Martin Keuchel
Flexible gastro-intestinal (GI) endoscopy is an integral diagnostic and therapeutic tool in clinical gastroenterology. High quality standards for safety, patients' comfort, and efficiency have already been achieved. Clinical challenges and technical approaches are discussed in this short review. Image enhanced endoscopy for further characterization of mucosal and vascular patterns includes dye-spray or virtual chromoendoscopy. For confocal laser endoscopy, endocytoscopy, and autofluorescence clinical value has not yet been finally evaluated...
2017: Computational and Structural Biotechnology Journal
https://www.readbyqxmd.com/read/28179313/comparative-study-of-mutations-in-single-nucleotide-polymorphism-loci-of-kras-and-braf-genes-in-patients-who-underwent-screening-colonoscopy-with-and-without-premalignant-intestinal-polyps
#13
Michail Galanopoulos, Ioannis S Papanikolaou, Eleni Zografos, Nikos Viazis, George Papatheodoridis, Dimitrios Karamanolis, Evangelos Marinos, Gerassimos J Mantzaris, Maria Gazouli
AIM: Our aim was to perform a comparison study of the mutation rate of V-Ki-ras2 Kirsten rat sarcoma viral oncogene homolog (KRAS), and v-Raf murine sarcoma viral oncogene homolog-B (BRAF) genes between blood-based cell-free DNA (cfDNA), and tissue sample biopsies in individuals undergoing screening colonoscopy. MATERIALS AND METHODS: All specimens were collected from January 2015 to January 2016. A total of 92 blood samples and colonic biopsy specimens were collected from healthy individuals with no polyps undergoing screening colonoscopy (group A, n=35), patients with colorectal cancer (group B, n=27), and patients with neoplastic intestinal polyps (group C, n=30)...
2017: Anticancer Research
https://www.readbyqxmd.com/read/28178153/case-report-malignant-transformation-in-cronkhite-canada-syndrome-polyp
#14
Ye Zong, Haiying Zhao, Li Yu, Ming Ji, Yongdong Wu, Shutian Zhang
RATIONALE: Cronkhite-Canada syndrome (CCS) is a rare disease, the etiology of CCS is currently unknown. Although CCS is widely accepted as a benign disorder, the malignant potential of the polyps in CCS patients is yet controversial. PATIENT CONCERNS: A 55-year-old Chinese male was first admitted to Beijing Friendship Hospital with a 3-month history of frequent watery diarrhea (10-15 times/day), loss of taste, and a weight loss of 10 kg in August 2010. The left heel bone fracture in the patient occurred about 2 weeks prior to his diarrhea...
February 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28177992/limited-endoscopic-assisted-wedge-resection-for-excision-of-colon-polyps
#15
Laura W Leicher, Wouter H de Vos Tot Nederveen Cappel, Henderik L van Westreenen
BACKGROUND: Combined endoscopic laparoscopic surgical removal is used for polyps in the colon that are not suitable for endoscopic removal because of size, location, or scarring. However, the placement of a linear stapler can be challenging. Currently a wedge resection is mostly documented in the cecum or ascending colon. OBJECTIVE: We report on our experience with limited endoscopy-assisted wedge resections in the entire colon. DESIGN: A retrospective study was performed...
March 2017: Diseases of the Colon and Rectum
https://www.readbyqxmd.com/read/28177905/trap1-protein-signature-predicts-outcome-in-human-metastatic-colorectal-carcinoma
#16
Francesca Maddalena, Vittorio Simeon, Giulia Vita, Annamaria Bochicchio, Luciana Possidente, Lorenza Sisinni, Giacomo Lettini, Valentina Condelli, Danilo Swann Matassa, Valeria Li Bergolis, Alberto Fersini, Sante Romito, Michele Aieta, Antonio Ambrosi, Franca Esposito, Matteo Landriscina
TRAP1 is a HSP90 molecular chaperone upregulated in colorectal carcinomas and involved in control of intracellular signaling, cell cycle, apoptosis and drug resistance, stemness and bioenergetics through co-traslational regulation of a network of client proteins. Thus, the clinical significance of TRAP1 protein network was analyzed in human colorectal cancers. TRAP1 and/or its client proteins were quantified, by immunoblot analysis, in 60 surgical specimens of colorectal carcinomas at different stages and, by immunohistochemistry, in 9 colorectal adenomatous polyps, 11 in situ carcinomas and 55 metastatic colorectal tumors...
February 3, 2017: Oncotarget
https://www.readbyqxmd.com/read/28165313/colonoscopic-and-histologic-features-of-rectal-masses-in-dogs-82-cases-1995-2012
#17
Krista N Adamovich-Rippe, Philipp D Mayhew, Stanley L Marks, Laura E Selmic, William T N Culp, Angela M Youello, Jeffrey J Runge, David E Holt, Philip H Kass, John R Peauroi
OBJECTIVE To evaluate colonoscopic and histologic features of rectal masses in dogs. DESIGN Retrospective case series. ANIMALS 82 client-owned dogs with rectal masses that underwent colonoscopy. PROCEDURES Medical records of dogs with rectal masses that underwent colonoscopy were reviewed. History, signalment, clinical signs, results of physical examination, diagnostic imaging findings, and results of colonoscopy (including complications) were recorded. When available, tissue samples obtained during colonoscopy and by means of surgical biopsy were reviewed by a single board-certified pathologist...
February 15, 2017: Journal of the American Veterinary Medical Association
https://www.readbyqxmd.com/read/28157706/the-level-of-epidermal-growth-factor-receptors-expression-is-correlated-with-the-advancement-of-colorectal-adenoma-validation-of-a-surface-biomarker
#18
Nicolas Williet, Carmen Adina Petcu, Leslie Rinaldi, Michèle Cottier, Emilie Del Tedesco, Léa Clavel, Olivier Dumas, Camille Jarlot, Nadia Bouarioua, Xavier Roblin, Michel Peoc'h, Jean-Marc Phelip
INTRODUCTION: Data about the expression of Epidermal Growth Factor Receptors (EGFRs) in colorectal adenomas remain scarce. RESULTS: 101 patients were enrolled including 53 controls. All adenomas (n = 38) and CRC (n = 5) were EGFR positive. Hyperplastic polyps (HP) (n = 8) and control colons (n = 53) were EGFR negative in half of cases (p < 0.0001). A well significant gradient of increased EGFR expression was observed between adjacent mucosa, hyperplastic lesions, low grade dysplasia (LGD) (n = 30), high grade dysplasia (HGD) adenomas (n = 9) and cancers (p < 0...
February 1, 2017: Oncotarget
https://www.readbyqxmd.com/read/28153571/providing-data-for-serrated-polyp-detection-rate-benchmarks-an-analysis-of-the-new-hampshire-colonoscopy-registry
#19
Joseph C Anderson, Lynn F Butterly, Julia E Weiss, Christina M Robinson
BACKGROUND AND AIMS: Similar to achieving adenoma detection rate (ADR) benchmarks to prevent colorectal cancer (CRC), achieving adequate serrated polyp detection rates (SDR) may be essential to the prevention of CRC associated with the serrated pathway. Previous studies have been based on data from high-volume endoscopists at single academic centers. Based on a hypothesis that ADR is correlated with SDR, we stratified a large, diverse group of endoscopists (n=77 practicing at 28 centers) into high and low performers based on ADR, to provide data for corresponding target SDR benchmarks...
January 30, 2017: Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/28151975/colonization-with-enterotoxigenic-bacteroides-fragilis-is-associated-with-early-stage-colorectal-neoplasia
#20
Rachel V Purcell, John Pearson, Alan Aitchison, Liane Dixon, Frank A Frizelle, Jacqueline I Keenan
BACKGROUND: Enterotoxigenic Bacteroides fragilis (ETBF) is a toxin-producing bacteria thought to possibly promote colorectal carcinogenesis by modulating the mucosal immune response and inducing epithelial cell changes. Here, we aim to examine the association of colonic mucosal colonization with ETBF and the presence of a range of lesions on the colonic neoplastic spectrum. METHODS: Mucosal tissue from up to four different colonic sites was obtained from a consecutive series of 150 patients referred for colonoscopy...
2017: PloS One
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