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Dysplasia in ulcerative colitis

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https://www.readbyqxmd.com/read/28811707/myo-inositol-reduces-%C3%AE-catenin-activation-in-colitis
#1
Emily M Bradford, Corey A Thompson, Tatiana Goretsky, Guang-Yu Yang, Luz M Rodriguez, Linheng Li, Terrence A Barrett
AIM: To assess dietary myo-inositol in reducing stem cell activation in colitis, and validate pβ-catenin(S552) as a biomarker of recurrent dysplasia. METHODS: We examined the effects of dietary myo-inositol treatment on inflammation, pβ-catenin(S552) and pAkt levels by histology and western blot in IL-10(-/-) and dextran sodium sulfate-treated colitic mice. Additionally, we assessed nuclear pβ-catenin(S552) in patients treated with myo-inositol in a clinical trial, and in patients with and without a history of colitis-induced dysplasia...
July 28, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28806821/endoscopic-submucosal-dissection-of-colitis-related-dysplasia
#2
Noriko Suzuki, Takashi Toyonaga, James E East
Background and study aims Endoscopic submucosal dissection (ESD) offers en bloc resection of lesions, allowing precise pathological assessment. Although possible in ulcerative colitis (UC) patients, the chronic inflammation may increase the procedural risks and reduce the complete resection rate. The aim of this study was to assess the feasibility of ESD for UC and to consider the factors contributing to its technical difficulty. Patients and methods Multicenter experiences of ESD for UC were retrospectively analyzed by reviewing endoscopic videos, pictures, reports, and clinical notes...
August 14, 2017: Endoscopy
https://www.readbyqxmd.com/read/28790093/aggressive-large-cell-neuroendocrine-carcinoma-of-the-sigmoid-colon-in-a-patient-with-ulcerative-colitis
#3
Patrick Stoner, Taban Ghaffaripour, David Cohen
Colonic inflammation seen in inflammatory bowel disease (IBD) predisposes to the development of colorectal adenocarcinoma. In contrast, colorectal neuroendocrine carcinomas (NECs) have rarely been reported in the setting of IBD, and no definitive relationship between these tumours and IBD has been established. Dysplasia from chronic inflammation leading to neuroendocrine cell differentiation may be responsible for NEC development, though this finding has not been seen consistently. We present a case of large-cell neuroendocrine carcinoma of the sigmoid colon in a 65-year-old woman with long-standing ulcerative colitis...
August 7, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28751935/chk1-promotes-dna-damage-response-bypass-following-oxidative-stress-in-a-model-of-hydrogen-peroxide-associated-ulcerative-colitis-through-jnk-inactivation-and-chromatin-binding
#4
Kathrin Reissig, Andrew Silver, Roland Hartig, Antje Schinlauer, Diana Walluscheck, Thomas Guenther, Sandra Siedentopf, Jochen Ross, Diep-Khanh Vo, Albert Roessner, Angela Poehlmann-Nitsche
Dysregulation of c-Jun N-terminal kinase (JNK) activation promoted DNA damage response bypass and tumorigenesis in our model of hydrogen peroxide-associated ulcerative colitis (UC) and in patients with quiescent UC (QUC), UC-related dysplasia, and UC-related carcinoma (UC-CRC), thereby adapting to oxidative stress. In the UC model, we have observed features of oncogenic transformation: increased proliferation, undetected DNA damage, and apoptosis resistance. Here, we show that Chk1 was downregulated but activated in the acute and quiescent chronic phases...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28751521/the-third-pathway-of-colorectal-carcinogenesis
#5
REVIEW
Carlos A Rubio, Giacomo Puppa, Giovanni de Petris, Lorand Kis, Peter T Schmidt
AIMS: The majority of the colorectal carcinomas (CRC) arise in a vast mucosal area built with columnar cells and mucus-producing goblet cells. These carcinomas evolve via the conventional (tubular/villous) adenoma-carcinoma pathway, or the serrated adenoma-carcinoma pathway. Much less frequently CRC arise in the gut-associated lymphoid tissue (GALT) mucosal domain via the third pathway of colorectal carcinogenesis. METHODS: All publications on human colorectal GALT carcinomas in the literature were reviewed...
July 27, 2017: Journal of Clinical Pathology
https://www.readbyqxmd.com/read/28706415/role-of-new-endoscopic-techniques-in-inflammatory-bowel-disease-management-has-the-change-come
#6
EDITORIAL
Loredana Goran, Lucian Negreanu, Ana Maria Negreanu
Despite significant therapeutic progress in recent years, inflammatory bowel disease (IBD), which includes Crohn's disease and ulcerative colitis, remains a challenge regarding its pathogenesis and long-term complications. New concepts have emerged in the management of this disease, such as the "treat-to-target" concept, in which mucosal healing plays a key role in the evolution of IBD, the risk of recurrence and the need for surgery. Endoscopy is essential for the assessment of mucosal inflammation and plays a pivotal role in the analysis of mucosal healing in patients with IBD...
June 28, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28694132/inflammatory-bowel-disease-and-small-bowel-cancer-risk-%C3%A2-clinical-characteristics-and-histopathology-a%C3%A2-population-based-study
#7
Rasmus Dahlin Bojesen, Lene Buhl Riis, Estrid Høgdall, Ole Haagen Nielsen, Tine Jess
BACKGROUND & AIMS: Inflammatory bowel disease (IBD) may increase risk of small bowel cancer (SBC). However, little is known of the characteristics and features of IBD-SBC, due to a low number of cases worldwide. We performed a population-based study of IBD and SBC to calculate risk and increase our understanding of clinical characteristics and histopathological and molecular features. METHODS: The study population consisted of all individuals aged 16 years or older living in Denmark during 1978-2010...
July 8, 2017: Clinical Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28686677/mdr1a-deficiency-restrains-tumor-growth-in-murine-colitis-associated-carcinogenesis
#8
Eva Maria Hennenberg, Annette Eyking, Henning Reis, Elke Cario
Patients with Ulcerative Colitis (UC) have an increased risk to develop colitis-associated colorectal cancer (CAC). Here, we found that protein expression of ABCB1 (ATP Binding Cassette Subfamily B Member 1) / MDR1 (multidrug resistance 1) was diminished in the intestinal mucosa of patients with active UC with or without CAC, but not in non-UC patients with sporadic colon cancer. We investigated the consequences of ABCB1/MDR1 loss-of-function in a common murine model for CAC (AOM/DSS). Mice deficient in MDR1A (MDR1A KO) showed enhanced intratumoral inflammation and cellular damage, which were associated with reduced colonic tumor size and decreased degree of dysplasia, when compared to wild-type (WT)...
2017: PloS One
https://www.readbyqxmd.com/read/28666016/detection-of-colonic-dysplasia-in-patients-with-ulcerative-colitis-using-a-targeted-fluorescent-peptide-and-confocal-laser-endomicroscopy-a-pilot-study
#9
Giovanni Domenico De Palma, Irene Colavita, Gerardo Zambrano, Mariano Cesare Giglio, Francesco Maione, Gaetano Luglio, Giovanni Sarnelli, Antonio Rispo, Pietro Schettino, Francesco Paolo D'Armiento, Fatima Domenica Elisa De Palma, Valeria D'Argenio, Francesco Salvatore
AIM: Targeted molecular probes have been used to detect sporadic colonic dysplasia during confocal laser endomicroscopy (CLE) with promising results. This is a feasibility pilot study aiming to assess the potential role of CLE combined with a fluorescent-labeled peptide to stain and detect dysplasia associated with Ulcerative Colitis. METHOD: A phage-derived heptapeptide with predicted high binding affinity for dysplastic tissue, was synthesized and labeled with fluorescein...
2017: PloS One
https://www.readbyqxmd.com/read/28664992/the-outcome-of-ulcerative-colitis-patients-undergoing-pouch-surgery-is-determined-by-pre-surgical-factors
#10
H Yanai, S Ben-Shachar, L Mlynarsky, L Godny, M Leshno, H Tulchinsky, I Dotan
BACKGROUND: Pouch surgery, a common intervention for ulcerative colitis (UC) complications, is often associated with the development of pouchitis. AIM: To identify predictors of pouch outcome in a cohort of patients with UC. METHODS: We conducted a retrospective unmatched case-cohort study in a tertiary IBD referral centre. Adult patients with UC were classified into the worst phenotype throughout follow-up: normal pouch, a form of chronic pouchitis (either chronic pouchitis or Crohn's like disease of pouch [CLDP]), or episodic recurrent acute pouchitis (RAP)...
June 30, 2017: Alimentary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28631086/nearly-a-third-of-high-grade-dysplasia-and-colorectal-cancer-is-undetected-in-patients-with-inflammatory-bowel-disease
#11
Swathi Eluri, Alyssa M Parian, Berkeley N Limketkai, Christina Y Ha, Steven R Brant, Sharon Dudley-Brown, Jonathan E Efron, Sandy G Fang, Susan L Gearhart, Michael R Marohn, Stephen J Meltzer, Safar Bashar, Brindusa Truta, Elizabeth A Montgomery, Mark G Lazarev
BACKGROUND: It is unclear whether intensive surveillance protocols have resulted in a decreased incidence of colorectal cancer (CRC) in inflammatory bowel disease (IBD). AIMS: To determine the prevalence and characteristics of IBD associated high-grade dysplasia (HGD) or CRC that was undetected on prior colonoscopy. METHODS: This is a single-center, retrospective study from 1994 to 2013. All participants had a confirmed IBD diagnosis and underwent a colectomy with either HGD or CRC found in the colectomy specimen...
June 19, 2017: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/28621756/p53-expression-as-a-diagnostic-biomarker-in-ulcerative-colitis-associated-cancer
#12
REVIEW
Kazuhiro Kobayashi, Hiroyuki Tomita, Masahito Shimizu, Takuji Tanaka, Natsuko Suzui, Tatsuhiko Miyazaki, Akira Hara
Ulcerative colitis (UC) is defined as an idiopathic inflammatory disorder primarily involving the mucosa and submucosa of the colon. UC-associated colon cancers (also known as colitic cancers) develop through the inflammation-dysplasia sequence, which is a major problem affecting the prognosis of patients with UC. It is therefore very important to detect malignancy from UC at an early stage. As precancerous lesions arising in UC, there are pathological adenomatous changes, basal cell changes, in situ anaplasia, clear cell changes, and pan-cellular change...
June 16, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28607292/laparoscopic-total-colectomy-for-ulcerative-colitis-after-liver-transplantation-is-feasible
#13
Benjamin Darnis, Gilles Poncet, Maud Robert
Ulcero-haemorrhagic rectocolitis can occur after liver transplantation for sclerosing cholangitis. Total colectomy with or without proctectomy may be indicated in case of chronic drug-resistant colitis, dysplasia or cancer. Today, laparoscopic approach is the standard for such procedure in non-operated patients. We performed a completely laparoscopic total colectomy 5 years after a liver transplantation. There were a few peritoneal adherences, and we could safely perform the procedure almost as usual. It provided all the advantages of the laparoscopic approach in the post-operative course...
July 2017: Journal of Minimal Access Surgery
https://www.readbyqxmd.com/read/28586045/low-htra1-expression-in-patients-with-long%C3%A2-standing-ulcerative-colitis-and-colorectal-cancer
#14
Emma Altobelli, Giovanni Latella, Manrico Morroni, Caterina Licini, Giovanni Tossetta, Roberta Mazzucchelli, Valerio F Profeta, Gino Coletti, Pietro Leocata, Mario Castellucci, Mario Guerrieri, Reimondo Petrocelli, Berardo De Berardis, Marina De Padova, Gabriella Di Leonardo, Antonella Paladini, Filippo Mignosi, Gina Quaglione, Roberto Fagnano, Daniela Marzioni
The association between inflammatory bowel disease (IBD) and colorectal cancer (CRC) is being increasingly investigated. HtrA1 overexpression inhibits cell growth and proliferation by influencing apoptosis, invasiveness and migration of tumour cells. In the present study, HtrA1 expression was analysed in 228 colon tissue samples from patients with CRC, adenoma with high-grade dysplasia (AHD), adenoma with low-grade dysplasia (ALD), ulcerative colitis of >10 year duration (UCL), ulcerative colitis of <5 year duration (UCS) and colonic diverticulitis (D), and was compared with its expression in normal colon tissues (NCTs) collected 5 cm from the CRC lesion and in healthy colon mucosa (HC), to establish whether HtrA1 can serve as a biomarker for these conditions...
June 6, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28556347/a-case-of-ulcerative-colitis-with-squamous-cell-carcinomas-and-multiple-foci-of-squamous-dysplasia
#15
Yasuyuki Yokoyama, Ryuichi Wada, Takeshi Yamada, Eiji Uchida, Zenya Naito
Squamous cell carcinoma (SqCC) in ulcerative colitis (UC) is rare. A 38 year-old Japanese woman, who suffered from left-sided UC for 18 years, underwent total colectomy due to SqCCs in the rectum and the sigmoid colon. They were well differentiated SqCC, and metastasis was found in the paracolic lymph nodes. Multiple small foci of squamous dysplasia (SD) were noted in the rectal mucosa. Glandular dysplasia was not found. TP53 was not detected in SD. Approximately 40% of cells were immunostained with TP53 in SqCC, however no mutation was found in TP53 gene...
May 28, 2017: Pathology International
https://www.readbyqxmd.com/read/28524162/targeted-sequencing-based-analyses-of-candidate-gene-variants-in-ulcerative-colitis-associated-colorectal-neoplasia
#16
Sanjiban Chakrabarty, Vinay Koshy Varghese, Pranoy Sahu, Pradyumna Jayaram, Bhadravathi M Shivakumar, Cannanore Ganesh Pai, Kapaettu Satyamoorthy
BACKGROUND: Long-standing ulcerative colitis (UC) leading to colorectal cancer (CRC) is one of the most serious and life-threatening consequences acknowledged globally. Ulcerative colitis-associated colorectal carcinogenesis showed distinct molecular alterations when compared with sporadic colorectal carcinoma. METHODS: Targeted sequencing of 409 genes in tissue samples of 18 long-standing UC subjects at high risk of colorectal carcinoma (UCHR) was performed to identify somatic driver mutations, which may be involved in the molecular changes during the transformation of non-dysplastic mucosa to high-grade dysplasia...
June 27, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28428105/microcarcinoid-arising-in-patients-with-long-standing-ulcerative-colitis-histological-analysis
#17
Sachie Kanada, Akira Sugita, Tetuo Mikami, Kenichi Ohashi, Hiroyuki Hayashi
Some case reports of neuroendocrine tumors (NETs) and neuroendocrine carcinoma (NEC) associated with ulcerative colitis (UC) have been published. Most NET cases are small lesions corresponding to microcarcinoids (MCs). However, published case reports have presented findings of MCs as single-case reports. Thus, the frequency of MCs is still unclear. In this study, we described the clinical and morphological features of 14 cases of UC-associated MC and estimated the frequency of MC. Consecutive patients with UC who underwent complete removal of the large intestine were assessed, and 135 patients were selected...
April 17, 2017: Human Pathology
https://www.readbyqxmd.com/read/28383667/inactivation-of-jnk2-as-carcinogenic-factor-in-colitis-associated-and-sporadic-colorectal-carcinogenesis
#18
Wiebke Lessel, Andrew Silver, Doerthe Jechorek, Thomas Guenther, Friedrich-Wilhelm Roehl, Thomas Kalinski, Albert Roessner, Angela Poehlmann-Nitsche
We recently reported that dysregulated c-Jun N-terminal kinases (JNK) activity causes defective cell cycle checkpoint control, inducing neoplastic transformation in a cellular ulcerative colitis (UC) model. In the quiescent chronic phase of UC, p-p54 JNK was down-regulated and p-p46 JNK was up-regulated. Both were up-regulated in the acute phase. Consequently, increased p21WAF1 and γ-H2AX, two JNK-regulated proteins, induced cell cycle arrest. Their down-regulation led to checkpoint override, causing increased proliferation and undetected DNA damage in quiescent chronic phase, all characteristics of tumorigenesis...
May 1, 2017: Carcinogenesis
https://www.readbyqxmd.com/read/28369329/vedolizumab-induces-long-term-mucosal-healing-in-patients-with-crohn-s-disease-and-ulcerative-colitis
#19
Maja Noman, Marc Ferrante, Raf Bisschops, Gert De Hertogh, Karolien Van den Broeck, Karen Rans, Paul J Rutgeerts, Séverine Vermeire, Gert Van Assche
Introduction.: Vedolizumab has proven efficacy in IBD, but long term mucosal healing in Crohn's disease (CD), as well as the incidence of colorectal neoplasia in IBD, among patients treated with vedolizumab have not been studied. We aimed to document mucosal healing and to explore the risk of colorectal neoplasia with vedolizumab maintenance therapy. Methods.: Surveillance colonoscopy was prospectively scheduled for patients with longstanding UC or CD at a tertiary referral center in the open label extension phase (vedolizumab 300 mg IV q 4 wks) of the Gemini studies (GEMINI LTS, study number NCT00790933)...
March 24, 2017: Journal of Crohn's & Colitis
https://www.readbyqxmd.com/read/28321155/pseudopolyps-in-inflammatory-bowel-diseases-have-we-learned-enough
#20
REVIEW
Dimitrios S Politis, Konstantinos H Katsanos, Epameinondas V Tsianos, Dimitrios K Christodoulou
Pseudopolyps are a well described entity in the literature and even though the exact pathogenesis of their formation is not completely understood, they are considered non-neoplastic lesions originating from the mucosa after repeated periods of inflammation and ulceration associated with excessive healing processes. Their occurrence is less common in Crohn's disease than in ulcerative colitis, and their overall prevalence ranges from 4% to 74%; moreover, they are found more often in colon but have been detected in other parts of the gastrointestinal tract as well...
March 7, 2017: World Journal of Gastroenterology: WJG
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