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https://www.readbyqxmd.com/read/29453478/endoscopic-sinus-surgery-for-sinonasal-polyposis-microdebrider-or-conventional-instruments
#1
Nabin Lageju, Bibhu Pradhan, Narmaya Thapa
INTRODUCTION: Sinonasal polyposis is one of the commonest causes of nasal obstruction. Surgical management is treatment of choice. Microdebrider offers more advantage to conventional instruments. We aimed to find out outcome using microdebrider versus conventional instruments in endoscopic sinus surgery of sinonasal polyposis. METHODS: The cross sectional descriptive study carried out in patients aged 13 years and above with diagnosis of sinonasal polyposis. Total of 51 patients were operated on the right side with microdebrider and left side with conventional instruments...
October 2017: JNMA; Journal of the Nepal Medical Association
https://www.readbyqxmd.com/read/29449562/chir99021-and-valproic-acid-reduce-the-proliferative-advantage-of-apc-mutant-cells
#2
Alistair J Langlands, Thomas D Carroll, Yu Chen, Inke Näthke
More than 90% of colorectal cancers carry mutations in Apc that drive tumourigenesis. A 'just-right' signalling model proposes that Apc mutations stimulate optimal, but not excessive Wnt signalling, resulting in a growth advantage of Apc mutant over wild-type cells. Reversal of this growth advantage constitutes a potential therapeutic approach. We utilised intestinal organoids to compare the growth of Apc mutant and wild-type cells. Organoids derived from Apc Min/+ mice recapitulate stages of intestinal polyposis in culture...
February 15, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29449169/interaction-of-the-wnt-%C3%AE-catenin-and-ras-erk-pathways-involving-co-stabilization-of-both-%C3%AE-catenin-and-ras-plays-important-roles-in-the-colorectal-tumorigenesis
#3
REVIEW
Sang-Kyu Lee, Jeong-Ha Hwang, Kang-Yell Choi
Cancer development is usually driven by multiple genetic and molecular alterations rather than by a single defect. In the human colorectal cancer (CRC), series of mutations of genes are involved in the different stages of tumorigenesis. For example, adenomatous polyposis coli (APC) and KRAS mutations have been known to play roles in the initiation and progression of the tumorigenesis, respectively. However, many studies indicate that mutations of these two genes, which play roles in the Wnt/β-catenin and RAS-extra-cellular signal regulated kinase (ERK) pathways, respectively, cooperatively interact in the tumorigenesis in several different cancer types including CRC...
January 10, 2018: Advances in Biological Regulation
https://www.readbyqxmd.com/read/29446530/a-novel-tissue-based-%C3%A3-catenin-gene-and-immunohistochemical-analysis-to-exclude-familial-adenomatous-polyposis-among-children-with-hepatoblastoma-tumors
#4
Hendrikus J Dubbink, Iris H I M Hollink, Carolina Avenca Valente, Wenhui Wang, Pengyu Liu, Michail Doukas, Max M van Noesel, Winand N M Dinjens, Anja Wagner, Ron Smits
BACKGROUND: The Wnt/β-catenin pathway plays a central role in the pathogenesis of most hepatoblastomas (HBs), that is, up to 60-80% carry activating CTNNB1 mutations. HBs can however also be the first manifestation of familial adenomatous polyposis (FAP). As this is a severe disease, it is important for the patient and related family members to firmly exclude FAP at an early stage. Current diagnosis largely depends on APC germline mutation detection on genomic DNA, which is associated with 10-20% false-negative results...
February 15, 2018: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/29439154/tumorigenic-colonic-bacteria-may-promote-early-neoplasia
#5
(no author information available yet)
Colonic biofilms may accelerate tumorigenesis in patients with familial adenomatous polyposis (FAP).
February 9, 2018: Cancer Discovery
https://www.readbyqxmd.com/read/29438366/ikk%C3%AE-is-required-in-the-intestinal-epithelial-cells-for-tumour-stemness
#6
Carlota Colomer, Pol Margalef, Jessica Gonzalez, Anna Vert, Anna Bigas, Lluis Espinosa
BACKGROUND: Colorectal cancer is a common cause of death in developed countries. Progression from adenoma to invasive carcinoma requires accumulation of mutations starting with the Adenomatous Polyposis Coli (Apc) gene. NF-κB signalling is a key element in cancer, mainly related to the activity of IKKβ. IKKα kinase also participates in this process by mechanisms that are primarily unknown. METHODS: We generated a compound mouse model with mutation in Apc and lacking intestinal epithelial IKKα, produced intestinal organoids and tumour spheroids with different genetic backgrounds, and performed immunohistochemistry and RNA-seq analysis...
February 13, 2018: British Journal of Cancer
https://www.readbyqxmd.com/read/29437297/snot-22-based-clusters-in-chronic-rhinosinusitis-without-nasal-polyposis-exhibit-distinct-endotypic-and-prognostic-differences
#7
Devyani Lal, Claire Hopkins, Rohit D Divekar
BACKGROUND: Endotypic and prognosticating features of chronic rhinosinusitis without nasal polyposis (CRSsNP) are poorly understood. Our objectives were to use an unbiased symptom-based approach to: (1) study symptoms, clinical and endotypic features; and (2) identify features predicating outcomes from endoscopic sinus surgery (ESS). METHODS: Clinical, computed tomography (CT), histopathology, and 22-item Sino-Nasal Outcome Test (SNOT-22) data was collected on 146 adult CRSsNP patients who underwent ESS...
February 13, 2018: International Forum of Allergy & Rhinology
https://www.readbyqxmd.com/read/29436014/comparison-of-dysplastic-fundic-gland-polyps-in-patients-with-and-without-familial-adenomatous-polyposis
#8
Shana F Straub, Michael G Drage, Raul S Gonzalez
AIM: Dysplastic FGPs (d-FGPs) typically arise in patients with familial adenomatous polyposis (FAP) but may occur in nonsyndromic patients. They rarely develop malignancy, but their significance is unclear, especially in nonsyndromic patients. APC/β-catenin alterations have been implicated in their pathogenesis, and β-catenin immunohistochemistry (IHC) may show nuclear positivity. METHODS AND RESULTS: We identified 124 FGPs with low-grade dysplasia (LGD) or high-grade dysplasia (HGD) or indefinite for dysplasia (IFD) from 66 patients (27 with FAP, 39 nonsyndromic)...
February 12, 2018: Histopathology
https://www.readbyqxmd.com/read/29435294/therapy-associated-myelodysplastic-syndrome-with-monosomy-7-arising-in-a-muir-torre-syndrome-patient-carrying-setbp1-mutation
#9
David Ullman, Erin Baumgartner, Nicholas Wnukowski, Gabe Koenig, Fady M Mikhail, Peter Pavlidakey, Deniz Peker
Muir-Torre Syndrome (MTS) is a rare hereditary autosomal dominant cancer syndrome and is linked to hereditary non-polyposis colorectal carcinoma (Lynch Syndrome). Individuals develop various skin neoplasms in addition to colorectal, endometrial and upper gastrointestinal malignancies. Therapy-associated myelodysplastic syndrome (T-MDS) is an aggressive hematologic malignancy and is considered a pre-leukemic phase. T-MDS is associated with prior exposure to chemo- and radiotherapy that potentially results in DNA damage...
February 2018: Molecular and Clinical Oncology
https://www.readbyqxmd.com/read/29435196/exon-3-mutations-of-ctnnb1-drive-tumorigenesis-a-review
#10
REVIEW
Chao Gao, Yingmei Wang, Russell Broaddus, Longhao Sun, Fengxia Xue, Wei Zhang
The canonical Wnt/β-catenin signaling pathway, an important modulator of progenitor cell proliferation and differentiation, is highly regulated for the maintenance of critical biological homeostasis. Decades of studies in cancer genetics and genomics have demonstrated that multiple genes encoding key proteins in this signaling pathway serve as targets for recurrent mutational alterations. Among these proteins, β-catenin and adenomatosis polyposis coli (APC) are two key nodes. β-catenin contributes in transporting extracellular signals for nuclear programming...
January 12, 2018: Oncotarget
https://www.readbyqxmd.com/read/29434827/anti-inflammatory-drug-resistance-selects-putative-cancer-stem-cells-in-a-cellular-model-for-genetically-predisposed-colon-cancer
#11
Nitin Telang
Mutations in the adenomatous polyposis coli (Apc) tumor suppressor gene represent the primary genetic defect in colon carcinogenesis. Apc+/- mouse models exhibit pre-invasive small intestinal adenomas. Cell culture models exhibiting Apc defects in the colon and quantifiable cancer risk provide a novel clinically relevant approach. The tumor-derived Apc-/- colonic epithelial cell line 1638N COL-Pr1 represented the experimental model. The anti-inflammatory drugs sulindac (SUL) and celecoxib (CLX) represented the test compounds...
January 2018: Oncology Letters
https://www.readbyqxmd.com/read/29434133/mantle-cell-lymphoma-with-a-single-protruding-lesion-as-the-cause-of-intussusception
#12
Katsunori Matsueda, Tatsuya Toyokawa, Masahiro Sakata, Isao Fujita, Jouichiro Horii
Mantle cell lymphoma (MCL) is a malignant lymphoma of the gastrointestinal tract that mostly presents as multiple lymphomatous polyposis (MLP); however, MLP with intussusception is rarely reported in MCL. Furthermore, a single protruding lesion with intussusception has never been reported in primary small intestinal MCL. A 70-year-old man presented with pain in the right lower abdomen. Computed tomography and colonoscopy revealed ileocecal intussusception. Ileocecal resection was performed. Histology and immunohistochemistry of the resected specimen showed MCL with a single protruding lesion...
February 9, 2018: Internal Medicine
https://www.readbyqxmd.com/read/29431745/dkk2-imparts-tumor-immunity-evasion-through-%C3%AE-catenin-independent-suppression-of-cytotoxic-immune-cell-activation
#13
Qian Xiao, Jibo Wu, Wei-Jia Wang, Shiyang Chen, Yingxia Zheng, Xiaoqing Yu, Katrina Meeth, Mahnaz Sahraei, Alfred L M Bothwell, Lieping Chen, Marcus Bosenberg, Jianfeng Chen, Veronika Sexl, Le Sun, Lin Li, Wenwen Tang, Dianqing Wu
Immunotherapy offers new options for cancer treatment, but efficacy varies across cancer types. Colorectal cancers (CRCs) are largely refractory to immune-checkpoint blockade, which suggests the presence of yet uncharacterized immune-suppressive mechanisms. Here we report that the loss of adenomatosis polyposis coli (APC) in intestinal tumor cells or of the tumor suppressor PTEN in melanoma cells upregulates the expression of Dickkopf-related protein 2 (DKK2), which, together with its receptor LRP5, provides an unconventional mechanism for tumor immune evasion...
February 12, 2018: Nature Medicine
https://www.readbyqxmd.com/read/29429965/mast-cells-promote-small-bowel-cancer-in-a-tumor-stage-specific-and-cytokine-dependent-manner
#14
Abdulrahman M Saadalla, Abu Osman, Michael F Gurish, Kristen L Dennis, Nichole R Blatner, Abdulmohammad Pezeshki, Kelly M McNagny, Hilde Cheroutre, Fotini Gounari, Khashayarsha Khazaie
Mast cells (MCs) are tissue resident sentinels that mature and orchestrate inflammation in response to infection and allergy. While they are also frequently observed in tumors, the contribution of MCs to carcinogenesis remains unclear. Here, we show that sequential oncogenic events in gut epithelia expand different types of MCs in a temporal-, spatial-, and cytokine-dependent manner. The first wave of MCs expands focally in benign adenomatous polyps, which have elevated levels of IL-10, IL-13, and IL-33, and are rich in type-2 innate lymphoid cells (ILC2s)...
February 13, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29423501/association-of-sulindac-and-erlotinib-vs-placebo-with-colorectal-neoplasia-in-familial-adenomatous-polyposis-secondary-analysis-of-a-randomized-clinical-trial
#15
N Jewel Samadder, Scott K Kuwada, Kenneth M Boucher, Kathryn Byrne, Priyanka Kanth, Wade Samowitz, David Jones, Sean V Tavtigian, Michelle Westover, Therese Berry, Kory Jasperson, Lisa Pappas, Laurel Smith, Danielle Sample, Randall W Burt, Deborah W Neklason
Importance: Patients with familial adenomatous polyposis (FAP) are at markedly increased risk for colorectal polyps and cancer. A combination of sulindac and erlotinib led to a 71% reduction in duodenal polyp burden in a phase 2 trial. Objective: To evaluate effect of sulindac and erlotinib on colorectal adenoma regression in patients with FAP. Design, Setting, and Participants: Prespecified secondary analysis for colorectal adenoma regression was carried out using data from a double-blind, randomized, placebo-controlled trial, enrolling 92 patients with FAP, conducted from July 2010 to June 2014 in Salt Lake City, Utah...
February 8, 2018: JAMA Oncology
https://www.readbyqxmd.com/read/29423374/the-international-study-of-the-allergic-rhinitis-survey-outcomes-from-4-geographical-regions
#16
Desiderio Passali, Cemal Cingi, Paola Staffa, Francesco Passali, Nuray Bayar Muluk, Maria Luisa Bellussi
Background: Allergic rhinitis (AR) is a global health problem and is characterised by one or more symptoms, including sneezing, itching, nasal congestion and rhinorrhea. Objective: We investigated the features of AR and the physician's approach to the management of AR patients in four geographical regions. Methods: In this cross-sectional study, a questionnaire survey concerning AR was completed by Honorary and Corresponding Members of the Italian Society of Rhinology from different countries among 4 world geographical regions-Asia, Europe, the Americas, and Africa...
January 2018: Asia Pacific Allergy
https://www.readbyqxmd.com/read/29422639/ileal-pouch-of-ulcerative-colitis-and-familial-adenomatous-polyposis-patients-exhibit-modulation-of-autophagy-markers
#17
Nielce Maria Paiva, Lívia Bitencourt Pascoal, Leandro Minatel Vidal Negreiros, Mariana Portovedo, Andressa Coope, Maria de Lourdes Setsuko Ayrizono, Claudio Saddy Rodrigues Coy, Marciane Milanski, Raquel Franco Leal
Total retocolectomy with ileal pouch-anal anastomosis (IPAA) is the surgery of choice for patients with ulcerative colitis (UC) that are refractory to clinical treatment. Pouchitis is one of the most common complications after this procedure. Defects in autophagy have been reported in inflammatory bowel diseases. However, there are no studies on the IP. Therefore, we studied markers for autophagy in the IP mucosa of UC and FAP patients comparing them to controls with a normal distal ileum. Sixteen patients with IP in "J" shape, asymptomatic and with endoscopically normal IP were evaluated...
February 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29420293/patients-with-familial-adenomatous-polyposis-harbor-colonic-biofilms-containing-tumorigenic-bacteria
#18
Christine M Dejea, Payam Fathi, John M Craig, Annemarie Boleij, Rahwa Taddese, Abby L Geis, Xinqun Wu, Christina E DeStefano Shields, Elizabeth M Hechenbleikner, David L Huso, Robert A Anders, Francis M Giardiello, Elizabeth C Wick, Hao Wang, Shaoguang Wu, Drew M Pardoll, Franck Housseau, Cynthia L Sears
Individuals with sporadic colorectal cancer (CRC) frequently harbor abnormalities in the composition of the gut microbiome; however, the microbiota associated with precancerous lesions in hereditary CRC remains largely unknown. We studied colonic mucosa of patients with familial adenomatous polyposis (FAP), who develop benign precursor lesions (polyps) early in life. We identified patchy bacterial biofilms composed predominately of Escherichia coli and Bacteroides fragilis Genes for colibactin (clbB) and Bacteroides fragilis toxin (bft), encoding secreted oncotoxins, were highly enriched in FAP patients' colonic mucosa compared to healthy individuals...
February 2, 2018: Science
https://www.readbyqxmd.com/read/29420096/gamma-globulin-replacement-therapy-in-uncontrolled-severe-asthma-associated-with-humoral-immunodeficiency-a-series-of-five-case-reports
#19
Angelica Tiotiu, Yves Martinet, Roger Jankowski, Philippe Devillier
We report on five adult cases of the rare association of asthma with humoral immunodeficiency (huID). All patients had uncontrolled asthma related to recurrent respiratory infections. Asthma was diagnosed according to the Global Initiative for Asthma (GINA) guidelines, and bronchiectasis was ruled out by a CT chest scan. Two men (aged 28 and 60) presented with pollen allergies, chronic rhinosinusitis, and IgG deficiency (7.8 and 7.6 g/L, respectively). Both patients underwent surgery for nasal polyposis but relapsed with acute sinusitis and severe asthma exacerbations requiring treatment with oral corticosteroids and antibiotics...
February 8, 2018: Journal of Asthma: Official Journal of the Association for the Care of Asthma
https://www.readbyqxmd.com/read/29419868/-concurrent-apc-and-mlh1mutations-identified-in-a-family-affected-with-familial-adenomatous-polyposis
#20
Chenguang Shang, Linzhi Liu, Xiaohui Wang, Ying Dong, Yan Zhang
OBJECTIVE To report on concurrent mutations of APC and MLH1 genes identified in a family affected with familial adenomatous polyposis(FAP). METHODS The proband was diagnosed with FAP based on her clinical manifestation, family history and histopathology examination. She developed endometrial epithelial neoplasia(EIN) two years later. With peripheral blood samples collected from her and members of her family, genomic DNA was extracted, and mutations of the APC and MLH1 genes were analyzed by Sanger sequencing...
February 10, 2018: Zhonghua Yi Xue Yi Chuan Xue za Zhi, Zhonghua Yixue Yichuanxue Zazhi, Chinese Journal of Medical Genetics
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