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https://www.readbyqxmd.com/read/28225043/prevention-of-tumorigenesis-in-mice-by-exercise-is-dependent-on-strain-background-and-timing-relative-to-carcinogen-exposure
#1
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
#2
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
#3
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 18, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28216966/suppression-of-colorectal-tumorigenesis-by-recombinant-bacteroides-fragilis-enterotoxin-2-in-vivo
#4
You Lv, Tao Ye, Hui-Peng Wang, Jia-Ying Zhao, Wen-Jie Chen, Xin Wang, Chen-Xia Shen, Yi-Bin Wu, Yuan-Kun Cai
AIM: To evaluate the impact of recombinant Bacteroides fragilis enterotoxin-2 (BFT-2, or Fragilysin) on colorectal tumorigenesis in mice induced by azoxymethane/dextran sulfate sodium (AOM/DSS). METHODS: Recombinant proBFT-2 was expressed in Escherichia coli strain Rosetta (DE3) and BFT-2 was obtained and tested for its biological activity via colorectal adenocarcinoma cell strains SW-480. Seventy C57BL/6J mice were randomly divided into a blank (BC; n = 10), model (AD; n = 20), model + low-dose toxin (ADLT; n = 20, 10 μg), and a model + high-dose toxin (ADHT; n = 20, 20 μg) group...
January 28, 2017: World Journal of Gastroenterology: WJG
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/28188554/disinfection-by-product-formation-during-chlor-am-ination-of-algal-organic-matters-aom-extracted-from-microcystis-aeruginosa-effect-of-growth-phases-aom-and-bromide-concentration
#6
Juxiang Chen, Naiyun Gao, Lei Li, Mingqiu Zhu, Jing Yang, Xian Lu, Yansen Zhang
Algae organic matter (AOM), including extracellular organic matter (EOM) and intracellular organic matter (IOM), has caused a series of problems to the water quality, among which formation of disinfection by-products (DBPs) during subsequent chlor(am)ination process was especially serious and concerned. This study characterized physicochemical properties of the EOM and IOM solution extracted from different growth phases of Microcystis aeruginosa and investigated the corresponding formation potential of DBPs during chlor(am)ination process...
February 10, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28188119/incidence-and-economic-burden-of-acute-otitis-media-in-children-aged-up-to-5years-in-three-middle-eastern-countries-and-pakistan-a-multinational-retrospective-observational-study
#7
Ghulam Mustafa, Amal Y Al Aidaroos, Idris S Al Abaidani, Kinga Meszaros, Kusuma Gopala, Mehmet Ceyhan, Mohamad Al-Tannir, Rodrigo DeAntonio, Shyam Bawikar, Johannes E Schmidt
Epidemiological data on acute otitis media (AOM), an infectious disease frequently affecting children, are lacking in some countries. This study was undertaken to assess the incidence of AOM in children ≤5years in Saudi Arabia, Oman, Pakistan, and Turkey, as well as the economic burden from a parent/caregiver perspective. Medical records of 4043 children (Saudi Arabia=1023, Oman=998, Pakistan=1022, Turkey=1000) were retrospectively reviewed and the incidence of AOM episodes calculated from suspected and confirmed cases...
February 7, 2017: Journal of Epidemiology and Global Health
https://www.readbyqxmd.com/read/28187456/inhibition-and-deficiency-of-the-immunoproteasome-subunit-lmp7-suppress-the-development-and-progression-of-colorectal-carcinoma-in-mice
#8
Julia Koerner, Thomas Brunner, Marcus Groettrup
New treatment options and drug targets for colorectal carcinoma are a pressing medical need. Inflammation and pro-inflammatory cytokines produced by Th1 and Th17 cells like IL-6, TNF, IL-17 and IL-23 promote the development and growth of colorectal cancer (CRC). The immunoproteasome is a proteasome subtype highly expressed in immune cells but also in the intestine. Since the immunoproteasome promotes Th1 and Th17 differentiation and pro-inflammatory cytokine production, we investigated here whether deficiency or inhibition of the immunoproteasome subunit LMP7 would interfere with CRC development and exacerbation in preventive and therapeutic mouse models...
February 7, 2017: Oncotarget
https://www.readbyqxmd.com/read/28178138/etiology-of-acute-otitis-media-and-serotype-distribution-of-streptococcus-pneumoniae-and-haemophilus-influenzae-in-chilean-children-5-years-of-age
#9
Andres Rosenblut, Carla Napolitano, Angelica Pereira, Camilo Moreno, Devayani Kolhe, Alejandro Lepetic, Eduardo Ortega-Barria
The impact of bacterial conjugate vaccines on acute otitis media (AOM) is affected by several factors including population characteristics, bacterial etiology and vaccine conjugation method, carrier, and coverage. This study estimated the baseline etiology, distribution, and antibiotic susceptibility of bacterial serotypes that causes AOM in children aged <5 years in a public setting in Santiago, Chile.Children aged ≥3 months and <5 years referred to the physician for treatment of AOM episodes (with an onset of symptoms <72 h) were enrolled between September 2009 and September 2010...
February 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28170280/super-users-at-an-acupuncture-and-oriental-medicine-teaching-clinic-demographics-and-unique-clinical-characteristics
#10
Forrest Cooper, Benjamin L Marx, Tamsin L Lee, Deborah Espesete
OBJECTIVE: The use of acupuncture in the United States has consistently grown over the last two decades, and the National Center for Complementary and Integrative Health has recently called for greater understanding of "real life outcomes and use" by complementary and alternative medicine users. This study assesses the demographics and utilization patterns of "super-users" treated at the Oregon College of Oriental Medicine intern clinic. METHODS: This was a retrospective chart review at the Oregon College of Oriental Medicine (OCOM) intern clinic, a large acupuncture and oriental medicine (AOM) school in Portland, Oregon...
February 7, 2017: Journal of Alternative and Complementary Medicine: Research on Paradigm, Practice, and Policy
https://www.readbyqxmd.com/read/28154498/reverse-methanogenesis-and-respiration-in-methanotrophic-archaea
#11
REVIEW
Peer H A Timmers, Cornelia U Welte, Jasper J Koehorst, Caroline M Plugge, Mike S M Jetten, Alfons J M Stams
Anaerobic oxidation of methane (AOM) is catalyzed by anaerobic methane-oxidizing archaea (ANME) via a reverse and modified methanogenesis pathway. Methanogens can also reverse the methanogenesis pathway to oxidize methane, but only during net methane production (i.e., "trace methane oxidation"). In turn, ANME can produce methane, but only during net methane oxidation (i.e., enzymatic back flux). Net AOM is exergonic when coupled to an external electron acceptor such as sulfate (ANME-1, ANME-2abc, and ANME-3), nitrate (ANME-2d), or metal (oxides)...
2017: Archaea: An International Microbiological Journal
https://www.readbyqxmd.com/read/28154415/genomic-variants-in-mouse-model-induced-by-azoxymethane-and-dextran-sodium-sulfate-improperly-mimic-human-colorectal-cancer
#12
Qingfei Pan, Xiaomin Lou, Ju Zhang, Yinghui Zhu, Fuqiang Li, Qiang Shan, Xianwei Chen, Yingying Xie, Siyuan Su, Hanfu Wei, Liang Lin, Lin Wu, Siqi Liu
Mouse model induced by azoxymethane (AOM) and dextran sodium sulfate (DSS) is generally accepted as an ideal object to study on the carcinogenesis mechanisms of human colorectal cancer (CRC). The genomic responses to the AOM/DSS treatment in mouse that possibly lead to elucidation of CRC pathological mechanism are still poorly understood. For the first time, we investigated the cancer genome landscape of AOM/DSS mouse model by exome sequencing, to testify its molecular faithfulness to human CRC. Of 14 neoplastic samples, 7575 somatic variants were identified, which resulted in 2507 mutant genes and exhibited a large diversity in both colorectal aberrant crypt foci (ACF) and tumors even those tissues that were gained from the similar morphology or same treatment period...
December 2017: Scientific Reports
https://www.readbyqxmd.com/read/28151883/beyond-bone-mineral-density-frax-based-tailor-made-intervention-thresholds-for-therapeutic-decision-in-subjects-on-glucocorticoid-a-nationwide-osteoporosis-survey
#13
Shan-Fu Yu, Jia-Feng Chen, Yin-Chou Chen, Han-Ming Lai, Chi-Hua Ko, Wen-Chan Chiu, Fu-Mei Su, Chung-Yuan Hsu, Ben Yu-Jih Su, Chih-Hsing Wu, Tien-Tsai Cheng
Glucocorticoid-induced osteoporosis (GIOP) is the most common cause of secondary osteoporosis and confers a substantial risk for future fractures. Several recent guidelines for GIOP management have recommended the use of intervention thresholds to direct pharmacological therapy in those at high risk of fracture. The aim of this study was to analyze the characteristics of subjects on a glucocorticoid (GC) and to implement the Fracture Risk Assessment Tool (FRAX)-based intervention threshold for therapeutic decision-making...
February 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28146613/efficacy-and-safety-of-aripiprazole-once-monthly-in-the-maintenance-treatment-of-bipolar-i-disorder-a-double-blind-placebo-controlled-52-week-randomized-withdrawal-study
#14
Joseph R Calabrese, Raymond Sanchez, Na Jin, Joan Amatniek, Kevin Cox, Brian Johnson, Pamela Perry, Peter Hertel, Pedro Such, Phyllis M Salzman, Robert D McQuade, Margaretta Nyilas, William H Carson
OBJECTIVE: To evaluate efficacy, safety, and tolerability of long-acting injectable antipsychotic aripiprazole once-monthly 400 mg (AOM 400) as maintenance treatment for bipolar I disorder (BP-I). METHODS: In a double-blind, placebo-controlled, 52-week randomized withdrawal study conducted from August 2012 to April 2016, patients with a DSM-IV-TR diagnosis of BP-I currently experiencing a manic episode were stabilized sequentially on oral aripiprazole and AOM 400 and then randomized to AOM 400 or placebo...
January 31, 2017: Journal of Clinical Psychiatry
https://www.readbyqxmd.com/read/28145888/adamts18-deficiency-promotes-colon-carcinogenesis-by-enhancing-%C3%AE-catenin-and-p38mapk-erk1-2-signaling-in-the-mouse-model-of-aom-dss-induced-colitis-associated-colorectal-cancer
#15
Tiantian Lu, Suying Dang, Rui Zhu, Ying Wang, Zongying Nie, Tao Hong, Wei Zhang
ADAMTS18 is a novel tumor suppressor and is critical to the pathology of human colorectal cancer. However, the underlying mechanism is not clear. Here we generated an Adamts18-deficient mouse strain as an in vivo model to investigate the role of ADAMTS18 in the pathogenesis of colorectal cancer. In AOM/DSS-induced colitis-associated colorectal cancer, the deficiency of Adamts18 in mice resulted in enhanced tumorigenesis and colon inflammation that could be attributed in part to enhanced nuclear translocation of β-catenin and elevated expression of its downstream target genes, cyclin D1 and c-myc...
January 27, 2017: Oncotarget
https://www.readbyqxmd.com/read/28143785/correlation-of-higher-antibody-levels-to-pneumococcal-proteins-with-protection-from-pneumococcal-acute-otitis-media-but-not-protection-from-nasopharyngeal-colonization-in-young-children
#16
Qingfu Xu, Janet R Casey, Anthony Almudevar, Michael E Pichichero
OBJECTIVES: We previously found that nasopharyngeal (NP) colonization by Streptococcus pneumoniae (Spn) elicits mucosal antibody responses to three protein vaccine candidates: pneumococcal histidine triad protein D (PhtD), pneumococcal choline binding protein A (PcpA), and detoxified pneumolysin (PlyD1). Here we sought to determine if mucosal antibody levels to the proteins correlated with protection from acute otitis media (AOM) and NP colonization. METHODS: 228 NP samples were prospectively collected from 100 healthy infants at 6-24 months of age...
January 28, 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/28124644/differences-in-innate-immune-response-gene-regulation-in-the-middle-ear-of-children-who-are-otitis-prone-and-in-those-not-otitis-prone
#17
Ravinder Kaur, Janet Casey, Michael Pichichero
OBJECTIVE: Acute otitis media (AOM) causes an inflammatory response in the middle ear. We assessed differences in innate immune responses involved in bacterial defense at onset of AOM in children who were stringently defined as otitis prone (sOP) and children not otitis prone (NOP). STUDY DESIGN: Innate immune genes analysis from middle ear fluid (MEF) samples of children. METHODS: Genes of toll-like receptors (TLR), nod-like and retinoic acid-inducible gene-I-like receptors, downstream effectors important for inflammation and apoptosis, including cytokines and chemokines, were studied from MEF samples by using a real-time polymerase chain reaction array...
November 1, 2016: American Journal of Rhinology & Allergy
https://www.readbyqxmd.com/read/28123846/phosphodiesterase-5-inhibition-suppresses-colonic-inflammation-induced-tumorigenesis-via-blocking-the-recruitment-of-mdsc
#18
Shiyong Lin, Jing Wang, Lihui Wang, Jing Wen, Yandong Guo, Weiguang Qiao, Jieqiong Zhou, Guoliang Xu, Fachao Zhi
Phosphodiesterase 5 (PDE-5) is a major isoform of cGMP phosphodiesterase in diverse tissues and plays a critical role in regulating intracellular cGMP concentrations. However, the distribution and expression of PDE-5 in colitis-related colon cancer was still unclear, not even the function and mechanism. Western blotting and ELISA were performed to detect colonic PDE-5 expression in AOM/DSS-induced tumorigenesis model. Sildenafil, a specific PDE-5 inhibitor, was used to treat AOM/DSS-induced and AOM-induced colonic tumorigenesis model and DSS-induced colitis model...
2017: American Journal of Cancer Research
https://www.readbyqxmd.com/read/28116546/cortical-synaptic-transmission-and-plasticity-in-acute-liver-failure-are-decreased-by-presynaptic-events
#19
Mariusz Popek, Bartosz Bobula, Joanna Sowa, Grzegorz Hess, Rafał Polowy, Robert Kuba Filipkowski, Małgorzata Frontczak-Baniewicz, Barbara Zabłocka, Jan Albrecht, Magdalena Zielińska
Neurological symptoms of acute liver failure (ALF) reflect decreased excitatory transmission, but the status of ALF-affected excitatory synapse has not been characterized in detail. We studied the effects of ALF in mouse on synaptic transmission and plasticity ex vivo and its relation to distribution of (i) synaptic vesicles (sv) and (ii) functional synaptic proteins within the synapse. ALF-competent neurological and biochemical changes were induced in mice with azoxymethane (AOM). Electrophysiological characteristics (long-term potentiation, whole-cell recording) as well as synapse ultrastructure were evaluated in the cerebral cortex...
January 23, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28116312/chemopreventive-effects-of-germinated-rough-rice-crude-extract-in-inhibiting-azoxymethane-induced-aberrant-crypt-foci-formation-in-sprague-dawley-rats
#20
Elnaz Saki, Latifah Saiful Yazan, Razana Mohd Ali, Zalinah Ahmad
Chemoprevention has become an important area in cancer research due to low success rate of current therapeutic modalities. Diet plays a vital role in the etiology of cancer. This research was carried out to study the chemopreventive properties of germinated rough rice (GRR) crude extract in Sprague-Dawley rats induced with azoxymethane. Germination of rough rice causes significant changes in several chemical compositions of presently bioactive compounds. These compounds may prevent or postpone the inception of cancer...
2017: BioMed Research International
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