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https://www.readbyqxmd.com/read/28323438/green-tea-polyphenols-inhibit-colorectal-tumorigenesis-in-azoxymethane-treated-f344-rats
#1
Xingpei Hao, Hang Xiao, Jihyeung Ju, Mao-Jung Lee, Joshua D Lambert, Chung S Yang
In studying the cancer-preventive activities of green tea polyphenols, we previously demonstrated that dietary administration of polyphenon E (PPE) inhibited the formation of aberrant crypt foci (ACF) in the colon of azoxymethane (AOM)-treated F344 rats. Herein, we reported cancer-preventive activity of PPE using colorectal cancer as an end point. F344 rats were given two weekly injections of AOM, and then maintained on a 20% high-fat diet with or without 0.24% PPE for 34 wk. In the control group, 83% of rats developed colorectal tumors...
March 21, 2017: Nutrition and Cancer
https://www.readbyqxmd.com/read/28316214/-expression-of-tyrosine-and-threonine-protein-kinase-in-carcinogenic-process-of-colorectal-cancer-and-its-relationship-with-prognosis
#2
X L Zhang, W X Han, Y M Ma, H W Y Baohan, X H Zhao, H Y Wang
Objective: To investigate the expression of TTK (tyrosine and threonine protein kinase) in the process of colorectal cancer (CRC) development and its relationship to prognosis in CRC patients. Methods: Colitis-associated colon cancer model was induced by azoxymethane (AOM) and dextran sulfate sodium (DSS) in C57BL/6 mice. Mice at four different stages of colon cancer development were obtained, named AD1 (inflammation of the recovery), AD2 (mild dysplasia), AD3 (adenoma) and AD4 (adenocarcinoma), as well as negative control (no treatment)...
March 23, 2017: Zhonghua Zhong Liu za Zhi [Chinese Journal of Oncology]
https://www.readbyqxmd.com/read/28315775/assessment-of-histone-tail-modifications-and-transcriptional-profiling-during-colon-cancer-progression-reveals-a-global-decrease-in-h3k4me3-activity
#3
Karen Triff, Mathew W McLean, Kranti Konganti, Jiahui Pang, Evelyn Callaway, Beiyan Zhou, Ivan Ivanov, Robert S Chapkin
During colon cancer, epigenetic alterations contribute to the dysregulation of major cellular functions and signaling pathways. Modifications in chromatin signatures such as H3K4me3 and H3K9ac, which are associated with transcriptionally active genes, can lead to genomic instability and perturb the expression of gene sets associated with oncogenic processes. In order to further elucidate early pre-tumorigenic epigenetic molecular events driving CRC, we integrated diverse, genome-wide, epigenetic inputs (by high throughput sequencing of RNA, H3K4me3, and H3K9ac) and compared differentially expressed transcripts (DE) and enriched regions (DER) in an in-vivo rat colon cancer progression model...
March 15, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28301579/a-novel-model-of-colitis-associated-cancer-in-samp1-yitfc-mice-with-crohn-s-disease-like-ileitis
#4
Paola Menghini, Luca Di Martino, Loris R Lopetuso, Daniele Corridoni, Joshua C Webster, Wei Xin, Kristen O Arseneau, Minh Lam, Theresa T Pizarro, Fabio Cominelli
Patients with inflammatory bowel disease (IBD) are at increased risk for developing colorectal cancer. Evidence suggests that colonic dysplasia and colitis-associated cancer (CAC) are often linked to repeated cycles of epithelial cell injury and repair in the context of chronic production of inflammatory cytokines. Several mouse models of CAC have been proposed, including chemical induction through exposure to dextran sulfate sodium (DSS) with the genotoxic agents azoxymethane (AOM), 1,2-dymethylhydrazine (DHM) or targeted genetic mutations...
2017: PloS One
https://www.readbyqxmd.com/read/28288018/cost-effectiveness-of-the-13-valent-pneumococcal-conjugate-vaccine-in-children-in-portugal
#5
Miguel Gouveia, Francesca Fiorentino, Gonçalo Jesus, João Costa, Margarida Borges
INTRODUCTION: Pneumococcal infections are the leading cause of vaccine-preventable death in children. In June 2015, the 13-valent pneumococcal conjugate vaccine (PCV13) was introduced in the Portuguese Immunization Program. We evaluate the cost-effectiveness of children vaccination with PCV13 versus no vaccination for preventing pneumococcal diseases (PD). METHOD: A cohort simulation model for 2014 Portuguese newborns was used, considering a lifetime horizon and existence of herd effect on adults...
March 10, 2017: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/28286013/membrane-fouling-by-sodium-alginate-in-high-salinity-conditions-to-simulate-biofouling-during-seawater-desalination
#6
Amine Charfi, Hoseok Jang, Jeonghwan Kim
This study aims to better understand biofouling by algal organic matters (AOM) during seawater pretreatment by microfiltration (MF). To simulate AOM biofouling, sodium alginate (SA) solutions with three different concentrations (2, 20 and 50ppm) were filtered in dead-end mode with MF membrane. A modelling approach with blocking laws was used to identify the fouling mechanisms behind flux decline with time. The effect of SA concentration and cations such as Na(+) (0.6M) and Ca(2+) (0.015M) addition to SA solution on fouling mechanisms was studied...
February 21, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28279741/enhanced-non-invasive-trans-tympanic-delivery-of-ciprofloxacin-through-encapsulation-into-nano-spanlastic-vesicles-fabrication-in-vitro-characterization-and-comparative-ex-vivo-permeation-studies
#7
Abdulaziz Mohsen Al-Mahallawi, Omneya Mohammed Khowessah, Raguia Ali Shoukri
The aim of this research was to encapsulate ciprofloxacin, a broad spectrum fluoroquinolone antibiotic, into Span 60 based nano-elastic vesicles, nano-spanlastics, for accomplishing improved non invasive trans-tympanic delivery, providing means for ototopical treatment of acute otitis media (AOM). To achieve this purpose, ciprofloxacin-loaded nano-spanlastics were prepared by thin film hydration (TFH) technique, using several non-ionic edge activators (EAs) according to full factorial design (3(2)). The investigation of the effect of formulation variables on nano-spanlastic characteristics and selection of the optimum formula were performed using Design-Expert(®) software...
March 7, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28279564/pneumococcal-carriage-and-serotype-variation-before-and-after-introduction-of-pneumococcal-conjugate-vaccines-in-patients-with-acute-otitis-media-in-switzerland
#8
Aurélie Allemann, Pascal M Frey, Silvio D Brugger, Markus Hilty
BACKGROUND: Acute otitis media (AOM) is an important cause for antibiotic prescription within the paediatric population and Streptococcus pneumoniae is a major pathogen associated with AOM episodes. This study aimed at analysing the influence of the heptavalent and 13-valent pneumococcal conjugate vaccines (PCV7 and PCV13) on pneumococcal carriage and serotype distribution in AOM. METHODS: Nasopharyngeal swabs (NPS) and middle ear fluid (MEF) were collected within a Swiss surveillance study of outpatients from all ages with AOM between 2004 and 2015, covering three vaccination eras (pre-PCV7, PCV7 and PCV13)...
March 6, 2017: Vaccine
https://www.readbyqxmd.com/read/28267439/mechanisms-of-colitis-accelerated-colon-carcinogenesis-and-its-prevention-with-the-combination-of-aspirin-and-curcumin-transcriptomic-analysis-using-rna-seq
#9
Yue Guo, Zheng-Yuan Su, Chengyue Zhang, John M Gaspar, Rui Wang, Ronald P Hart, Michael P Verzi, Ah-Ng Tony Kong
Colorectal cancer (CRC) remains the leading cause of cancer-related death in the world. Aspirin (ASA) and curcumin (CUR) are widely investigated chemopreventive candidates for CRC. However, the precise mechanisms of their action and their combinatorial effects have not been evaluated. The purpose of the present study was to determine the effect of ASA, CUR, and their combination in azoxymethane/dextran sulfate sodium (AOM/DSS)-induced colitis-accelerated colorectal cancer (CAC). We also aimed to characterize the differential gene expression profiles in AOM/DSS-induced tumors as well as in tumors modulated by ASA and CUR using RNA-seq...
March 3, 2017: Biochemical Pharmacology
https://www.readbyqxmd.com/read/28263971/egfr-mediated-macrophage-activation-promotes-colitis-associated-tumorigenesis
#10
D M Hardbower, L A Coburn, M Asim, K Singh, J C Sierra, D P Barry, A P Gobert, M B Piazuelo, M K Washington, K T Wilson
Epidermal growth factor receptor (EGFR) signaling is a known mediator of colorectal carcinogenesis. Studies have focused on the role of EGFR signaling in epithelial cells, although the exact nature of the role of EGFR in colorectal carcinogenesis remains a topic of debate. Here, we present evidence that EGFR signaling in myeloid cells, specifically macrophages, is critical for colon tumorigenesis in the azoxymethane-dextran sodium sulfate (AOM-DSS) model of colitis-associated carcinogenesis (CAC). In a human tissue microarray, colonic macrophages demonstrated robust EGFR activation in the pre-cancerous stages of colitis and dysplasia...
March 6, 2017: Oncogene
https://www.readbyqxmd.com/read/28258074/cost-effectiveness-of-watchful-waiting-in-acute-otitis-media
#11
Di Sun, T J McCarthy, Danica B Liberman
BACKGROUND: American Academy of Pediatrics guidelines for acute otitis media (AOM) allow for children meeting certain criteria to undergo watchful waiting (WW). The cost-effectiveness of this policy has not been evaluated in the United States. METHODS: A retrospective review of a random selection of 250 patients ≤18 years old with AOM in the emergency department of a tertiary care children's hospital was used to characterize current practice of AOM management...
March 3, 2017: Pediatrics
https://www.readbyqxmd.com/read/28257541/risk-factors-for-outpatient-use-of-antibiotics-in-children-with-acute-respiratory-illnesses
#12
Sophie R Zhao, Marie R Griffin, Barron L Patterson, Rachel L Mace, Dayna Wyatt, Yuwei Zhu, H Keipp Talbot
OBJECTIVES: Antibiotics for acute respiratory illness (ARI) constitute most pediatric medication use and contribute to the emergence of antimicrobial resistance. We investigated antibiotic prescription risk factors for ARI in pediatric clinics and clinical follow-up in individuals prescribed and not prescribed antibiotics. METHODS: In this observational study, we enrolled children ages 2 to 17 years old presenting with ARI with fever to two academic pediatric primary care outpatient clinics during influenza season 2013-2014...
March 2017: Southern Medical Journal
https://www.readbyqxmd.com/read/28252452/reduced-sexual-dysfunction-with-aripiprazole-once-monthly-versus-paliperidone-palmitate-results-from-qualify
#13
Steven G Potkin, Jean-Yves Loze, Carlos Forray, Ross A Baker, Christophe Sapin, Timothy Peters-Strickland, Maud Beillat, Anna-Greta Nylander, Peter Hertel, Henrik Steen Andersen, Anna Eramo, Karina Hansen, Dieter Naber
Sexual dysfunction, a common side effect of antipsychotic medications, may be partly caused by dopamine antagonism and elevation of prolactin. In QUALIFY, a randomized study, aripiprazole once-monthly 400 mg (AOM 400), a dopamine D2 receptor partial agonist, showed noninferiority and subsequent superiority versus paliperidone palmitate (PP), a dopamine D2 receptor antagonist, on the Heinrichs-Carpenter Quality-of-Life Scale (QLS) in patients with schizophrenia aged 18-60 years. Sexual dysfunction (Arizona Sexual Experience Scale) and serum prolactin levels were also assessed...
March 1, 2017: International Clinical Psychopharmacology
https://www.readbyqxmd.com/read/28245338/boswellia-serrata-resin-extract-alleviates-azoxymethane-aom-dextran-sodium-sulfate-dss-induced-colon-tumorigenesis
#14
Ya-Chun Chou, Joon Hyuk Suh, Yu Wang, Manoj Pahwa, Vladimir Badmeav, Chi-Tang Ho, Min-Hsiung Pan
SCOPE: Boswellia serrata (BS) resin is a popular dietary supplement for joint nourishment. In this study, we investigated the chemopreventive effects of dietary BS extract and its impact of gut microbiota on azoxymethane/dextran sulfate sodium (AOM/DSS)-induced colitis-associated colon cancer in mice. METHODS AND RESULTS: Male ICR mice were injected with AOM and 2% DSS via drinking water. The mice were fed with 0.25% or 0.5% BS extract, and colonic tissue were collected at 15 wk...
February 28, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/28244296/bacterial-species-and-antibiotic-sensitivity-in-korean-patients-diagnosed-with-acute-otitis-media-and-otitis-media-with-effusion
#15
Sang Hoon Kim, Eun Ju Jeon, Seok Min Hong, Chang Hoon Bae, Ho Yun Lee, Moo Kyun Park, Jae Yong Byun, Myung Gu Kim, Seung Geun Yeo
Changes over time in pathogens and their antibiotic sensitivity resulting from the recent overuse and misuse of antibiotics in otitis media (OM) have complicated treatment. This study evaluated changes over 5 years in principal pathogens and their antibiotic sensitivity in patients in Korea diagnosed with acute OM (AOM) and OM with effusion (OME). The study population consisted of 683 patients who visited the outpatient department of otorhinolaryngology in 7 tertiary hospitals in Korea between January 2010 and May 2015 and were diagnosed with acute AOM or OME...
April 2017: Journal of Korean Medical Science
https://www.readbyqxmd.com/read/28241627/hybrid-q-switched-laser-with-mos-sub-2-sub-saturable-absorber-and-aom-driven-sub-nanosecond-ktp-opo
#16
Junpeng Qiao, Shengzhi Zhao, Kejian Yang, Jia Zhao, Guiqiu Li, Dechun Li, Tao Li, Wenchao Qiao
Two-dimensional (2D) materials, especially transition-metal dichalcogenides, such as molybdenum disulfide (MoS<sub>2</sub>) and tungsten disulfide (WS<sub>2</sub>), have attracted great interests due to their exceptional optical properties as saturable absorbers in laser systems. In this work, at first, we presented a diode-pumped passively Q-switched laser with MoS<sub>2</sub> saturable absorber (MoS<sub>2</sub>-SA). At an incident pump power of 6.54 W, a maximum output power of 1...
February 20, 2017: Optics Express
https://www.readbyqxmd.com/read/28235386/characteristics-of-ci-children-with-complicated-middle-ear-infections
#17
Søren Hoberg, Christian Danstrup, Bjarke Laursen, Niels Krintel Petersen, Nichlas Udholm, Gintaras Audrius Kamarauskas, Therese Ovesen
OBJECTIVE: To describe cases of complicated middle ear infections in children with cochlear implants (CI), i.e., episodes of acute otitis media (AOM) and acute mastoiditis (AM), resulting in hospitalization. METHODS: A total of 206 children under 16 years (300 implantations) were implanted between 1 January 2008 and 31 December 2014 at the West Danish CI Center, Department of Otorhinolaryngology Head and Neck Surgery, Aarhus, Denmark. By means of two prospective local databases, episodes of AOM or AM and demographics were retrieved including biochemistry, microbiology, length of follow- up, and variable treatment modalities (intravenous (IV) antibiotics, revision mastoidectomy, and insertion of ventilation tubes)...
February 24, 2017: Cochlear Implants International
https://www.readbyqxmd.com/read/28225043/prevention-of-tumorigenesis-in-mice-by-exercise-is-dependent-on-strain-background-and-timing-relative-to-carcinogen-exposure
#18
Scott A Kelly, Liyang Zhao, Kuo-Chen Jung, Kunjie Hua, David W Threadgill, Yunjung Kim, Fernando Pardo Manuel de Villena, Daniel Pomp
Among cancer diagnoses, colorectal cancer (CRC) is prevalent, with a lifetime risk of developing CRC being approximately 5%. Population variation surrounding the mean risk of developing CRCs has been associated with both inter-individual differences in genomic architecture and environmental exposures. Decreased risk of CRC has been associated with physical activity, but protective responses are variable. Here, we utilized a series of experiments to examine the effects of genetic background (strain), voluntary exercise (wheel running), and their interaction on azoxymethane (AOM)-induced intestinal tumor number and size in mice...
February 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28222755/wd-repeat-protein-wdr13-is-a-novel-transcriptional-regulator-of-c-jun-and-modulates-intestinal-homeostasis-in-mice
#19
Vijay Pratap Singh, Saritha Katta, Satish Kumar
BACKGROUND: WDR13 is a member of the WD repeat protein family and is expressed in several tissues of human and mice. Previous studies in our laboratory showed that the lack of this gene in mice resulted in mild obesity, hyperinsulinemia, enhanced beta cell proliferation and protection from inflammation. However, the molecular mechanism of WDR13 action is not well understood. METHODS: In the present study, we used AOM/DSS to induce colitis-mediated colorectal tumor after establishing expression of Wdr13 gene in colon...
February 21, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28222396/lawsone-suppresses-azoxymethane-mediated-colon-cancer-in-rats-and-reduces-proliferation-of-dld-1-cells-via-nf-%C3%AE%C2%BAb-pathway
#20
Shi-Bin Wang, Zhenzhou Tao, Ping Li
Lawsone (LS) a colored napthoquinone compound obtained from the plant Lawsonia inermis L. (Lythraceae) is known for its usefulness of being a precursor for synthesis of some anticancer compounds. Literatures support potent anticancer activity of napthoquinone derivatives in human colon cancer, present study evaluates the effect and mechanism of LS on chemical induced colon cancerous rats and human colon cancer DLD-1 cells, the study was supported by endoscopy, histological and immunohistochemistry analysis...
February 20, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
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