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cox 2 in preventive colorectal

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https://www.readbyqxmd.com/read/28212276/preventive-effects-of-pentoxifylline-on-the-development-of-colonic-premalignant-lesions-in-obese-and-diabetic-mice
#1
Kazufumi Fukuta, Yohei Shirakami, Akinori Maruta, Koki Obara, Soichi Iritani, Nobuhiko Nakamura, Takahiro Kochi, Masaya Kubota, Hiroyasu Sakai, Takuji Tanaka, Masahito Shimizu
Obesity and its related metabolic abnormalities, including enhanced oxidative stress and chronic inflammation, are closely related to colorectal tumorigenesis. Pentoxifylline (PTX), a methylxanthine derivative, has been reported to suppress the production of tumor necrosis factor (TNF)-α and possess anti-inflammatory properties. The present study investigated the effects of PTX on the development of carcinogen-induced colorectal premalignant lesions in obese and diabetic mice. Male C57BL/KsJ-db/db mice, which are severely obese and diabetic, were administered weekly subcutaneous injections of the colonic carcinogen azoxymethane (15 mg/kg body weight) for four weeks and then received drinking water containing 125 or 500 ppm PTX for eight weeks...
February 15, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28139830/low-dose-aspirin-acetylates-cyclooxygenase-1-in-human-colorectal-mucosa-implications-for-the-chemoprevention-of-colorectal-cancer
#2
Paola Patrignani, Angela Sacco, Carlos Sostres, Annalisa Bruno, Melania Dovizio, Elena Piazuelo, Luigia Di Francesco, Annalisa Contursi, Mirco Zucchelli, Simone Schiavone, Stefania Tacconelli, Carlo Patrono, Angel Lanas
The mechanism of action of low-dose aspirin in the prevention of colorectal cancer (CRC) remains largely hypothetical. We aimed to compare the effects of low-dose aspirin (100 mg/day for 7 days) given to 40 individuals undergoing CRC screening on the extent of cyclooxygenase (COX)-1 acetylation at serine-529 (AceCOX-1), in blood platelets vs colorectal mucosa, at 7 (group 1) and 24 hours (group 2) after dosing. A significantly (P<0.01) lower %AceCOX-1 was detected in colonic and rectal mucosa (average 64%) vs platelets (average 75%) in both groups...
January 31, 2017: Clinical Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28120565/parameters-of-glucose-and-lipid-metabolism-affect-the-occurrence-of-colorectal-adenomas-detected-by-surveillance-colonoscopies
#3
Nam Hee Kim, Jung Yul Suh, Jung Ho Park, Dong Il Park, Yong Kyun Cho, Chong Il Sohn, Kyuyong Choi, Yoon Suk Jung
PURPOSE: Limited data are available regarding the associations between parameters of glucose and lipid metabolism and the occurrence of metachronous adenomas. We investigated whether these parameters affect the occurrence of adenomas detected on surveillance colonoscopy. MATERIALS AND METHODS: This longitudinal study was performed on 5289 subjects who underwent follow-up colonoscopy between 2012 and 2013 among 62171 asymptomatic subjects who underwent an initial colonoscopy for a health check-up between 2010 and 2011...
March 2017: Yonsei Medical Journal
https://www.readbyqxmd.com/read/27965474/a%C3%A3-a%C3%A3-berries-inhibit-colon-tumorigenesis-in-azoxymethane-dextran-sulfate-sodium-treated-mice
#4
Yoon Jin Choi, Yoon Jeong Choi, Nayoung Kim, Ryoung Hee Nam, Seonmin Lee, Hye Seung Lee, Ha-Na Lee, Young-Joon Surh, Dong Ho Lee
Background/Aims: The aim of this study was to investigate the protective effect of açaí against azoxymethane (AOM)/dextran sulfate sodium (DSS)-induced colorectal cancer development. Methods: The effect of açaí on tumorigenesis was assessed by evaluating tumor incidence, multiplicity and invasiveness in the mouse colon. The levels of myeloperoxidase (MPO) and proinflammatory cytokines (tumor necrosis factor α [TNF-α], interleukin [IL]-1β, and IL-6) were measured via enzyme-linked immunosorbent assay...
December 16, 2016: Gut and Liver
https://www.readbyqxmd.com/read/27910140/side-effects-of-irinotecan-cpt-11-the-clinically-used-drug-for-colon-cancer-therapy-are-eliminated-in-experimental-animals-treated-with-latex-proteins-from-calotropis-procera-apocynaceae
#5
Nylane Maria Nunes de Alencar, Flávio da Silveira Bitencourt, Ingrid Samantha Tavares de Figueiredo, Patrícia Bastos Luz, Roberto César P Lima-Júnior, Karoline Sabóia Aragão, Pedro Jorge Caldas Magalhães, Gerly Anne de Castro Brito, Ronaldo Albuquerque Ribeiro, Ana Paula Fragoso de Freitas, Marcio Viana Ramos
Intestinal mucositis (IM) is the critical side effect of irinotecan (CPT-11), which is the front-line drug used for the treatment of colorectal cancer. This study aimed to evaluate the effectiveness of latex proteins (LP) from Calotropis procera to prevent IM and diarrhea in animals. Swiss mice were treated daily with saline or LP (1, 5, or 50 mg/kg, i.v.) 24 h prior to CTP-11 (75 mg/kg/4 days, i.p) and for additional 6 days. Animal survival, body weight variation, and diarrhea were registered. After animal sacrifice (day 7 post first injection of CPT-11), intestinal samples were collected to study morphology and inflammatory parameters...
February 2017: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/27902713/association-of-n-linked-glycoprotein-acetyls-and-colorectal-cancer-incidence-and-mortality
#6
Paulette D Chandler, Akintunde O Akinkuolie, Deirdre K Tobias, Patrick R Lawler, Chungying Li, M Vinayaga Moorthy, Lu Wang, Daniel A Duprez, David R Jacobs, Robert J Glynn, James Otvos, Margery A Connelly, Wendy S Post, Paul M Ridker, JoAnn E Manson, Julie E Buring, I-Min Lee, Samia Mora
BACKGROUND: Acute phase proteins highlight the dynamic interaction between inflammation and oncogenesis. GlycA, a novel nuclear magnetic resonance (NMR) inflammatory marker that identifies primarily circulating N-acetyl glycan groups attached to acute phase proteins, may be a future CRC risk biomarker. METHODS: We examined the association between GlycA and incident CRC and mortality in two prospective cohorts (N = 34,320); Discovery cohort: 27,495 participants from Women's Health Study (WHS); Replication cohort: 6,784 participants from Multi-Ethnic Study of Atherosclerosis (MESA)...
2016: PloS One
https://www.readbyqxmd.com/read/27894402/hsp90-inhibitor-enhances-anti-proliferative-and-apoptotic-effects-of-celecoxib-on-ht-29-colorectal-cancer-cells-via-increasing-bax-bcl-2-ratio
#7
A Mohammadi, M M Yaghoobi, A GholamhoseynianNajar, B Kalantari-Khandani, H Sharifi, M Saravani
Due to the high prevalence and mortality rate of colorectal cancer (CRC), new treatment approaches like combination therapy seem to be necessary. The relationship between chronic inflammation and colorectal cancer development and progression has been shown to be important. Celecoxib, a selective COX-2 inhibitor, is the only non-steroidal anti-inflammatory drug (NSAID) that has been approved for cancer therapy and prevention. Because of cardiovascular side effects of COX-2 inhibitors, combination therapy may improve the therapeutic profile...
October 31, 2016: Cellular and Molecular Biology
https://www.readbyqxmd.com/read/27810226/the-role-of-cyclooxygenase-2-in-colorectal-carcinogenesis
#8
REVIEW
Yongsong Liu, Hong Sun, Min Hu, Yuan Zhang, Shuangling Chen, Sean Tighe, Yingting Zhu
Colorectal cancer is a major worldwide health care problem that accounts for 1 million new cases each year. The risk factors for this disease include hereditary factors, environmental agents, and inflammatory stimuli that affect the gastrointestinal tract. Among these risk factors, cyclooxygenase-2 (COX-2) is one of the major players in the progression of colorectal cancer; however, the detailed mechanism of its role in causing colorectal cancer is still not well understood. In addition, the role of COX-2 signaling through the interaction in the epithelial and stromal compartments on colorectal carcinogenesis has not been fully illustrated...
October 6, 2016: Clinical Colorectal Cancer
https://www.readbyqxmd.com/read/27743227/cancer%C3%A2-survivorship-defining-the-incidence-of-incisional-hernia-after-resection-for-intra-abdominal-malignancy
#9
Rebeccah B Baucom, Jenny Ousley, Gloria B Beveridge, Sharon E Phillips, Richard A Pierce, Michael D Holzman, Kenneth W Sharp, William H Nealon, Benjamin K Poulose
BACKGROUND: Cancer survivorship focuses largely on improving quality of life. We aimed to determine the rate of ventral incisional hernia (VIH) formation after cancer resection, with implications for survivorship. METHODS: Patients without prior VIH who underwent abdominal malignancy resections at a tertiary center were followed up to 2 years. Patients with a viewable preoperative computed tomography (CT) scan and CT within 2 years postoperatively were included...
December 2016: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/27530656/celecoxib-for-the-prevention-of-colorectal-adenomas-results-of-a-suspended-randomized-controlled-trial
#10
Patricia A Thompson, Erin L Ashbeck, Denise J Roe, Liane Fales, Julie Buckmeier, Fang Wang, Achyut Bhattacharyya, Chiu-Hsieh Hsu, Sherry H H Chow, Dennis J Ahnen, C Richard Boland, Russell I Heigh, David E Fay, Stanley R Hamilton, Elizabeth T Jacobs, Elena Maria Martinez, David S Alberts, Peter Lance
BACKGROUND: Cyclooxygenase (COX)-2 inhibitors such as celecoxib were designed to preserve anti-inflammatory activity without inhibiting COX-1. Downregulation of COX-2 inhibits colorectal carcinogenesis. METHODS: The Selenium and Celecoxib Trial was a randomized, placebo-controlled trial of once-daily selenium 200 µg and celecoxib 400 mg, alone or together, for colorectal adenoma prevention. Men and women between age 40 and 80 years were eligible following colonoscopic removal of adenomas...
December 2016: Journal of the National Cancer Institute
https://www.readbyqxmd.com/read/27447122/lactobacillus-rhamnosus-induced-epithelial-cell-apoptosis-ameliorates-inflammation-and-prevents-colon-cancer-development-in-an-animal-model
#11
Yaser Gamallat, Abdo Meyiah, Eugene D Kuugbee, Ahmed Musa Hago, Gift Chiwala, Annoor Awadasseid, Djibril Bamba, Xin Zhang, Xueqi Shang, Fuwen Luo, Yi Xin
BACKGROUND/AIM: Probiotics have been suggested as prophylactic measure in colon carcinogenesis. This study aimed at determining the potential prophylactic activity of Lactobacillus rhamnosus GG CGMCC 1.2134 (LGG) strain on colorectal carcinogenesis via measuring its effect on Nuclear factor kappa B (NFκB) inflammatory pathway and apoptosis. MATERIALS AND METHODS: 64 Sprague Dawley rats were grouped into four as follows; Group 1 (Healthy control), Group 2 (LGG), Group 3 (cancer control Dimethyl hydrazine (DMH)) and Group 4 (LGG+DMH)...
October 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/27384052/structural-change-in-microbiota-by-a-probiotic-cocktail-enhances-the-gut-barrier-and-reduces-cancer-via-tlr2-signaling-in-a-rat-model-of-colon-cancer
#12
Eugene Dogkotenge Kuugbee, Xueqi Shang, Yaser Gamallat, Djibril Bamba, Annoor Awadasseid, Mohammed Ahmed Suliman, Shizhu Zang, Yufang Ma, Gift Chiwala, Yi Xin, Dong Shang
BACKGROUND: Structural change in the gut microbiota is implicated in cancer. The beneficial modulation of the microbiota composition with probiotics and prebiotics prevents diseases. AIM: We investigated the effect of oligofructose-maltodextrin-enriched Lactobacillus acidophilus, Bifidobacteria bifidum, and Bifidobacteria infantum (LBB), on the gut microbiota composition and progression of colorectal cancer. METHODS: Sprague Dawley rats were acclimatized, given ampicillin (75 mg/kg), and treated as follows; GCO: normal control; GPR: LBB only; GPC: LBB+ 1,2-dimethylhydrazine dihydrochloride (DMH); and GCA: DMH only (cancer control)...
October 2016: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/27235931/reducing-liver-metastases-of-colon-cancer-in-the-context-of-extensive-and-minor-surgeries-through-%C3%AE-adrenoceptors-blockade-and-cox2-inhibition
#13
Liat Sorski, Rivka Melamed, Pini Matzner, Hagar Lavon, Lee Shaashua, Ella Rosenne, Shamgar Ben-Eliyahu
Liver metastases are a major cause of colorectal cancer death, and the perioperative period is believed to critically affect the metastatic process. Here we tested whether blocking excess release of catecholamines and prostaglandins during surgical procedures of different extent can reduce experimental liver metastasis of the syngeneic CT26 colon cancer in female and male BALB/c mice. Animals were either treated with the beta-blocker, propranolol, the COX-2 inhibitor, etodolac, both drugs, or vehicle. The role of NK cells in controlling CT26 hepatic metastasis and in mediating the effect of the drugs was assessed by in vivo depletion or stimulation of NK cells, using anti-asialo GM1 or CpG-C, respectively...
May 25, 2016: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/27220873/is-adherence-to-diet-physical-activity-and-body-weight-cancer-prevention-recommendations-associated-with-colorectal-cancer-incidence-in-african-american-women
#14
Sarah J O Nomura, Chiranjeev Dash, Lynn Rosenberg, Jeffrey Yu, Julie R Palmer, Lucile L Adams-Campbell
PURPOSE: The purpose of this study was to evaluate whether adherence to the World Cancer Research Fund/American Institute for Cancer Research (WCRF/AICR) cancer prevention recommendations was associated with colorectal cancer incidence in the Black Women's Health Study (BWHS). METHODS: In this ongoing prospective cohort of African American women (analytic cohort n = 49,103), 354 incident colorectal cancers were diagnosed between baseline (1995) and 2011. Adherence scores for seven WCRF/AICR recommendations (adherent = 1 point, non-adherent level 1 = 0...
2016: Cancer Causes & Control: CCC
https://www.readbyqxmd.com/read/27207670/the-epigenetic-effects-of-aspirin-the-modification-of-histone-h3-lysine-27-acetylation-in-the-prevention-of-colon-carcinogenesis-in-azoxymethane-and-dextran-sulfate-sodium-treated-cf-1-mice
#15
Yue Guo, Yue Liu, Chengyue Zhang, Zheng-Yuan Su, Wenji Li, Mou-Tuan Huang, Ah-Ng Kong
Colorectal cancer (CRC) is the third most common cancer worldwide. Chronic inflammation appears to enhance the risk of CRC. Emerging evidence has suggested that epigenetic mechanisms play an important role in CRC. Aspirin [acetylsalicylic acid (ASA)] has been shown to prevent CRC; however, the epigenetic mechanisms of its action remain unknown. This study investigated the protective role of ASA in azoxymethane (AOM)-initiated and dextran sulfate sodium (DSS)-promoted colitis-associated colon cancer (CAC) and examined the epigenetic effects, particularly on histone 3 lysine 27 acetylation (H3K27ac), underlying the preventive effect of ASA...
2016: Carcinogenesis
https://www.readbyqxmd.com/read/27192488/resistance-to-3-htmc-induced-apoptosis-through-activation-of-pi3k-akt-mek-erk-and-p38-cox-2-pge2-pathways-in-human-ht-29-and-hct116-colorectal-cancer-cells
#16
Josiane Semaan, Aline Pinon, Benjamin Rioux, Lama Hassan, Youness Limami, Christelle Pouget, Catherine Fagnère, Vincent Sol, Mona Diab-Assaf, Alain Simon, Bertrand Liagre
Increasing incidence and mortality of colorectal cancer brings the necessity to uncover new possibilities in its prevention and treatment. Chalcones have been identified as interesting compounds having chemopreventive and antitumor properties. In this study, we investigated the effects of the synthetic chalcone derivative 3-hydroxy-3',4,4',5'-tetra-methoxy-chalcone (3-HTMC) on proliferation, cell cycle distribution, apoptosis and its mechanism of action in human colorectal HT-29 (COX-2 sufficient) and HCT116 (COX-2 deficient) cancer cells...
May 18, 2016: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/27138583/racial-ethnic-disparities-in-survival-among-patients-with-young-onset-colorectal-cancer
#17
Andreana N Holowatyj, Julie J Ruterbusch, Laura S Rozek, Michele L Cote, Elena M Stoffel
PURPOSE: Racial disparities in colorectal cancer (CRC) persist, despite overall reductions in morbidity and mortality. In addition, incidence is rising among individuals younger than 50 years of age. We compared the survival of young-onset CRC among non-Hispanic black (NHB), non-Hispanic white (NHW), and Hispanic individuals. PATIENTS AND METHODS: Using the National Cancer Institute's Surveillance, Epidemiology, and End Results program data, we identified individuals between the ages of 20 and 49 years, diagnosed with CRC between 2000 and 2009...
June 20, 2016: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/27099252/lipid-biomarkers-and-long-term-risk-of-cancer-in-the-women-s-health-study
#18
Paulette D Chandler, Yiqing Song, Jennifer Lin, Shumin Zhang, Howard D Sesso, Samia Mora, Edward L Giovannucci, Kathryn E Rexrode, M Vinayaga Moorthy, Chunying Li, Paul M Ridker, I-Min Lee, JoAnn E Manson, Julie E Buring, Lu Wang
BACKGROUND: Lipid biomarkers, such as HDL-cholesterol concentrations, have been shown to have positive, inverse, and null associations with total, breast, and colorectal cancer risks. Studies of novel lipid biomarkers, such as apolipoprotein A-I (apo A-I) and apolipoprotein B-100 (apo B-100), and cancer risk have been sparse, to our knowledge. OBJECTIVES: We evaluated the prospective association of total, breast, colorectal, and lung cancers and cancer mortality with circulating lipid biomarkers in 15,602 female health professionals in the Women's Health Study (aged ≥45 y, free of cardiovascular disease and cancer, and without hormone replacement therapy or lipid-lowering medications at baseline)...
June 2016: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/26950314/cancer-risk-among-the-hiv-infected-elderly-in-the-united-states
#19
Elizabeth L Yanik, Hormuzd A Katki, Eric A Engels
OBJECTIVE: HIV-infected people and elderly people have higher cancer risk, but the combined effects of aging and HIV are not well described. We aimed to evaluate the magnitude of cancer risk in the HIV-infected elderly population. DESIGN: We conducted a case-cohort study including a 5% sample of U.S. Medicare enrollees and all cancer cases aged at least 65 in linked cancer registries. METHODS: HIV was identified through Medicare claims. Among the HIV-infected, absolute cancer risk was calculated accounting for the competing risk of death...
June 19, 2016: AIDS
https://www.readbyqxmd.com/read/26896068/combination-of-metformin-and-5-aminosalicylic-acid-cooperates-to-decrease-proliferation-and-induce-apoptosis-in-colorectal-cancer-cell-lines
#20
Mona M Saber, May A Galal, Afaf A Ain-Shoka, Samia A Shouman
BACKGROUND: The link between inflammation and cancer has been confirmed by the use of anti-inflammatory therapies in cancer prevention and treatment. 5-aminosalicylic acid (5-ASA) was shown to decrease the growth and survival of colorectal cancer (CRC) cells. Studies also revealed that metformin induced apoptosis in several cancer cell lines. METHODS: We investigated the combinatory effect of 5-ASA and metformin on HCT-116 and Caco-2 CRC cell lines. Apoptotic markers were determined using western blotting...
February 19, 2016: BMC Cancer
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