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https://www.readbyqxmd.com/read/29141026/in-depth-phenotypic-characterization-of-multicellular-tumor-spheroids-effects-of-5-fluorouracil
#1
Angélique Virgone-Carlotta, Manon Lemasson, Hichem C Mertani, Jean-Jacques Diaz, Sylvain Monnier, Thomas Dehoux, Hélène Delanoë-Ayari, Charlotte Rivière, Jean-Paul Rieu
MultiCellular Tumor Spheroids (MCTS), which mimic the 3-Dimensional (3D) organization of a tumor, are considered as better models than conventional cultures in 2-Dimensions (2D) to study cancer cell biology and to evaluate the response to chemotherapeutic drugs. A real time and quantitative follow-up of MCTS with simple and robust readouts to evaluate drug efficacy is still missing. Here, we evaluate the chemotherapeutic drug 5-Fluorouracil (5-FU) response on the growth and integrity of MCTS two days after treatment of MCTS and for three colorectal carcinoma cell lines with different cohesive properties (HT29, HCT116 and SW480)...
2017: PloS One
https://www.readbyqxmd.com/read/29139055/downstream-breast-imaging-following-screening-mammography-in-medicare-patients-with-advanced-cancer-a-population-based-study
#2
Gelareh Sadigh, Richard Duszak, Kevin C Ward, Renjian Jiang, Jeffrey M Switchenko, Kimberly E Applegate, Ruth C Carlos
BACKGROUND: Screening tests are generally not recommended in patients with advanced cancer and limited life expectancy. Nonetheless, screening mammography still occurs and may lead to follow-up testing. OBJECTIVE: We assessed the frequency of downstream breast imaging following screening mammography in patients with advanced colorectal or lung cancer. DESIGN: Population-based study. PARTICIPANTS: The study included continuously enrolled female fee-for-service Medicare beneficiaries ≥65 years of age with advanced colorectal (stage IV) or lung (stage IIIB-IV) cancer reported to a Surveillance, Epidemiology, and End Results (SEER) registry between 2000 and 2011...
November 14, 2017: Journal of General Internal Medicine
https://www.readbyqxmd.com/read/29138933/population-based-screening-improves-histopathological-prognostic-factors-in-colorectal-cancer
#3
Mónica Mengual-Ballester, Enrique Pellicer-Franco, Graciela Valero-Navarro, Victoriano Soria-Aledo, José Andrés García-Marín, José Luis Aguayo-Albasini
INTRODUCTION: Diagnosis of colorectal cancer (CRC) based on clinical symptoms is usually established in its advanced stages. One strategy for reducing mortality is the early detection and removal of preneoplastic and initial neoplastic lesions, even before the first symptoms appear, by means of population-based screening campaigns. The aim of the present study is to determine whether CRC diagnosed via a screening campaign has more favourable histopathological prognostic factors than when diagnosed in the symptomatic phase...
November 14, 2017: International Journal of Colorectal Disease
https://www.readbyqxmd.com/read/29133256/when-should-screening-stop-for-elderly-individuals-at-average-and-increased-risk-for-colorectal-cancer
#4
Folasade P May, Samir Gupta
No abstract text is available yet for this article.
November 10, 2017: Clinical Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/29133254/characteristics-and-progression-of-preclinical-inflammatory-bowel-disease
#5
Iago Rodríguez-Lago, Olga Merino, Irene Azagra, Ainara Maiz, Eva Zapata, Rebeca Higuera, Isabel Montalvo, María Fernández-Calderón, Paz Arreba, Juan Carrascosa, Ainara Iriarte, Isabel Portillo, Urko Aguirre, Manuel Barreiro-de Acosta, Miguel Muñoz-Navas, José Luis Cabriada
BACKGROUND & AIMS: Inflammatory bowel disease (IBD) is a chronic disease usually diagnosed after the appearance of gastrointestinal symptoms. Little is known about IBD progression during its early and even preclinical phases. We aimed to determine the number of new incidental diagnoses of IBD in an older population, and evaluate disease progression from its early stages. METHODS: We performed a retrospective analysis of 31,005 colonoscopies performed during colorectal cancer screening of patients with positive results from fecal immunochemical tests, at 11 centers in the Basque Country (Spain) from 2009 through 2014...
November 10, 2017: Clinical Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/29133190/integrating-geriatric-assessment-in-the-first-line-chemotherapy-treatment-in-older-patients-with-metastatic-colorectal-cancer-results-of-a-prospective-observational-cohort-study-avaplus
#6
Lore Decoster, Cindy Kenis, Benedicte Naessens, Ghislain Houbier, Marc De Man, Guy Lambrecht, Els Monsaert, Veerle Moons, Philippe Vergauwe, Hans Prenen, Eric Van Cutsem, Hans Wildiers
OBJECTIVES: This study aims to investigate the use of chemotherapy with or without bevacizumab in older patients with metastatic colorectal cancer (mCRC) in current daily practice and to identify predictive parameters for treatment-related outcomes. PATIENTS AND METHODS: This is a Belgian multi-centre, observational cohort study. Patients≥70years old with mCRC considered suitable for first-line chemotherapy were eligible for inclusion. At baseline geriatric screening and assessment was performed...
November 10, 2017: Journal of Geriatric Oncology
https://www.readbyqxmd.com/read/29131348/the-value-of-contrast-enhanced-laparoscopic-ultrasound-during-robotic-assisted-surgery-for-primary-colorectal-cancer
#7
Signe Bremholm Ellebaek, Claus Wilki Fristrup, Torsten Pless, Peiman Hossein Poornoroozy, Per Vadgaard Andersen, Bassam Mahdi, Michael Bau Mortensen
AIM: The aim of this study was to assess the potential clinical value of contrast enhanced laparoscopic ultrasonography (CE-LUS) as a screening modality for liver metastases during robotic assisted surgery for primary colorectal cancer (CRC). METHOD: A prospective, descriptive (feasibility) study including 50 consecutive patients scheduled for robotic assisted surgery for primary CRC. CE-LUS was performed by 2 experienced specialists. Only patients without metastatic disease were included...
November 13, 2017: Journal of Clinical Ultrasound: JCU
https://www.readbyqxmd.com/read/29130628/characterization-of-genetic-intratumor-heterogeneity-in-colorectal-cancer-and-matching-patient-derived-spheroid-cultures
#8
Sigrid Salling Árnadóttir, Maria Jeppesen, Philippe Lamy, Jesper Bertram Bramsen, Iver Nordentoft, Michael Knudsen, Søren Vang, Mogens Rørbaek Madsen, Ole Thastrup, Jacob Thastrup, Claus Lindbjerg Andersen
Patient-derived in vitro cultures of colorectal cancer (CRC) may help guide treatment strategies prior to patient treatment. However, most previous studies have been performed on a single biopsy per tumor. The purpose of this study was to analyze multiple spatially distinct biopsies from CRCs and see how well intratumor heterogeneity (ITH) was recapitulated in matching patient-derived spheroids. Three to five biopsies were collected from six CRC tumors. Each biopsy was split in two; one half was used for spheroid culturing, the other half was used for DNA and RNA purification...
November 11, 2017: Molecular Oncology
https://www.readbyqxmd.com/read/29129470/risk-stratification-for-surgical-outcomes-in-older-colorectal-cancer-patients-using-isar-hp-and-g8-screening-tools
#9
Esteban T D Souwer, Norbert M Verweij, Frederiek van den Bos, Esther Bastiaannet, Rob M E Slangen, Willem H Steup, Marije E Hamaker, Johanna E A Portielje
BACKGROUND: Older patients are at risk for adverse outcomes after surgical treatment of cancer. Identifying patients at risk could affect treatment decisions and prevent functional decline. Screening tools are available to select patients for Geriatric Assessment. Until now their predictive value for adverse outcomes in older colorectal cancer patients has not been investigated. OBJECTIVE: To study the predictive value of the Geriatric 8 (G8) and Identification of Seniors at Risk for Hospitalized Patients (ISAR-HP) screening tools for adverse outcomes after elective colorectal surgery in patients older than 70years...
November 9, 2017: Journal of Geriatric Oncology
https://www.readbyqxmd.com/read/29129048/-guida-per-la-determinazione-del-sangue-occulto-fecale-metodo-immunochimico-quantitativo-fit-hb-nei-programmi-di-screening-per-il-carcinoma-colorettale
#10
Tiziana Rubeca, Stefano Rapi, Silvia Deandrea, Morena Malaspina, Basilio Ubaldo Passamonti, Elena Grassi, Anna Maria Cioccarelli, Enrico Marchetti, Michela Boni, Filippo Cellai, Marco Pradella, Franco Gattafoni, Sabrina Rotolo
BACKGROUND: in Italy, colorectal cancer screening is included as part of the Italian National Health Service - SSN (Servizio Sanitario Nazionale) Essential Levels of Care - LEA (Livelli Essenziali Assistenziali) and the European Guidelines, which specify quantitative FIT-Hb testing as the best strategy for organised screening programmes. To ensure consistent operating standards in Member States, European regulations require the implementation of certification and accreditation requirements for diagnostic and care-related processes...
September 2017: Epidemiologia e Prevenzione
https://www.readbyqxmd.com/read/29128931/universal-determination-of-microsatellite-instability-using-bat26-as-a-single-marker-in-an-argentine-colorectal-cancer-cohort
#11
María Laura González, Natalia Causada-Calo, Juan Pablo Santino, Mev Dominguez-Valentin, Fabiana Alejandra Ferro, Inés Sammartino, Pablo Germán Kalfayan, Maria Alicia Verzura, Tamara Alejandra Piñero, Andrea Romina Cajal, Walter Pavicic, Carlos Vaccaro
Microsatellite instability (MSI) is a hallmark tool for Lynch syndrome (LS) screening and a prognostic marker for sporadic colorectal cancer (CRC). In regions with limited resources and scarce CRC molecular characterization as South America, the implementation of universal MSI screening is under debate for both its purposes. We sought to estimate the frequency of BAT26 in colorectal adenocarcinomas and to determine associated clinical and histological features. Consecutive patients from a CRC registry were included...
November 11, 2017: Familial Cancer
https://www.readbyqxmd.com/read/29128568/race-in-cancer-health-disparities-theme-issue-colorectal-cancer-disparity-in-african-americans-risk-factors-and-carcinogenic-mechanisms
#12
REVIEW
Gaius J Augustus, Nathan A Ellis
African Americans have the highest incidence and mortality rates of colorectal cancer (CRC) of any ethnic group in the United States. Although some of these disparities can be explained by differences in access to care, cancer screening, and other socioeconomic factors, disparities remain after adjustment for these factors. Consequently, an examination of recent advances in the understanding of ethnicity-specific factors, including genetic and environmental factors relating to risk of CRC, the biology of CRC progression, and the changes in screening and mortality, is important for evaluating our progress towards eliminating the disparities...
November 8, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/29125435/health-literacy-among-medically-underserved-the-role-of-demographic-factors-social-influence-and-religious-beliefs
#13
Shannon M Christy, Clement K Gwede, Steven K Sutton, Enmanuel Chavarria, Stacy N Davis, Rania Abdulla, Chitra Ravindra, Ida Schultz, Richard Roetzheim, Cathy D Meade
The current study examined the sociodemographic and psychosocial variables that predicted being at risk for low health literacy among a population of racially and ethnically diverse patients accessing primary care services at community-based clinics. Participants (N = 416) were aged 50-75 years, currently not up-to-date with colorectal cancer (CRC) screening, at average CRC risk, and enrolled in a randomized controlled trial (RCT) aimed at promoting CRC screening. Participants completed a baseline interview that assessed health literacy as measured by Rapid Estimate of Adult Literacy in Medicine-Revised, sociodemographic factors, and psychosocial variables (e...
November 10, 2017: Journal of Health Communication
https://www.readbyqxmd.com/read/29125240/tumor-associated-dna-mutation-detection-in-individuals-undergoing-colonoscopy
#14
Phillip Fleshner, Glenn D Braunstein, Gayane Ovsepyan, Theresa R Tonozzi, Anja Kammesheidt
The majority of colorectal cancers (CRC) harbor somatic mutations and epigenetic modifications in the tumor tissue, and some of these mutations can be detected in plasma as circulating tumor DNA (ctDNA). Precancerous colorectal lesions also contain many of these same mutations. This study examined plasma for ctDNA from patients undergoing a screening or diagnostic colonoscopy to determine the sensitivity and specificity of the ctDNA panel for detecting CRC and precancerous lesions. Two hundred patients without a history of nonskin cancer had blood drawn before a colonoscopy...
November 10, 2017: Cancer Medicine
https://www.readbyqxmd.com/read/29125233/in-vivo-imaging-xenograft-models-for-the-evaluation-of-anti-brain-tumor-efficacy-of-targeted-drugs
#15
Kenji Kita, Sachiko Arai, Akihiro Nishiyama, Hirokazu Taniguchi, Koji Fukuda, Rong Wang, Tadaaki Yamada, Shinji Takeuchi, Shoichiro Tange, Atsushi Tajima, Mitsutoshi Nakada, Kazuo Yasumoto, Yoshiharu Motoo, Takashi Murakami, Seiji Yano
Molecular-targeted drugs are generally effective against tumors containing driver oncogenes, such as EGFR, ALK, and NTRK1. However, patients harboring these oncogenes frequently experience a progression of brain metastases during treatment. Here, we present an in vivo imaging model for brain tumors using human cancer cell lines, including the EGFR-L858R/T790M-positive H1975 lung adenocarcinoma cells, the NUGC4 hepatocyte growth factor (HGF)-dependent gastric cancer cells, and the KM12SM colorectal cancer cells containing the TPM3-NTRK1 gene fusion...
November 10, 2017: Cancer Medicine
https://www.readbyqxmd.com/read/29122835/multiple-hotspot-mutations-scanning-by-single-droplet-digital-pcr
#16
Charles Decraene, Amanda Silveira, François-Clément Bidard, Audrey Vallee, Marc Michel, Samia Melaabi, Anne Vincent-Salomon, Adrien Saliou, Alexandre Houy, Maud Milder, Olivier Lantz, Marc Ychou, Marc G Denis, Jean-Yves Pierga, Marc-Henri Stern, Charlotte Proudhon
BACKGROUND: Progress in the liquid biopsy field, combined with the development of droplet digital PCR (ddPCR)(12), has enabled noninvasive monitoring of mutations with high detection accuracy. However, current assays detect a restricted number of mutations per reaction. ddPCR is a recognized method for detecting alterations previously characterized in tumor tissues, but its use as a discovery tool when the mutation is unknown a priori remains limited. METHODS: We established 2 ddPCR assays detecting all genomic alterations within KRAS() exon 2 and EGFR exon 19 mutation hotspots, which are of clinical importance in colorectal and lung cancer, with use of a unique pair of TaqMan® oligoprobes...
November 9, 2017: Clinical Chemistry
https://www.readbyqxmd.com/read/29120461/risk-of-colorectal-cancer-for-carriers-of-a-germ-line-mutation-in-pole-or-pold1
#17
Daniel D Buchanan, Jenna R Stewart, Mark Clendenning, Christophe Rosty, Khalid Mahmood, Bernard J Pope, Mark A Jenkins, John L Hopper, Melissa C Southey, Finlay A Macrae, Ingrid M Winship, Aung Ko Win
BackgroundGerm-line mutations in the exonuclease domains of the POLE and POLD1 genes are associated with an increased, but yet unquantified, risk of colorectal cancer (CRC).MethodsWe identified families with POLE or POLD1 variants by searching PubMed for relevant studies prior to October 2016 and by genotyping 669 population-based CRC cases diagnosed in patients under 60 years of age, from the Australasian Colorectal Cancer Family Registry. We estimated the age-specific cumulative risks (penetrance) using a modified segregation analysis...
November 9, 2017: Genetics in Medicine: Official Journal of the American College of Medical Genetics
https://www.readbyqxmd.com/read/29120399/a-microbiomic-analysis-in-african-americans-with-colonic-lesions-reveals-streptococcus-sp-vt162-as-a-marker-of-neoplastic-transformation
#18
Hassan Brim, Shibu Yooseph, Edward Lee, Zaki Sherif, Muneer Abbas, Adeyinka O Laiyemo, Sudhir Varma, Manolito Torralba, Scot E Dowd, Karen E Nelson, Wimal Pathmasiri, Susan Sumner, Willem de Vos, Qiaoyi Liang, Jun Yu, Erwin Zoetendal, Hassan Ashktorab
Increasing evidence suggests a role of the gut microbiota in colorectal carcinogenesis (CRC). To detect bacterial markers of colorectal cancer in African Americans a metabolomic analysis was performed on fecal water extracts. DNA from stool samples of adenoma and healthy subjects and from colon cancer and matched normal tissues was analyzed to determine the microbiota composition (using 16S rDNA) and genomic content (metagenomics). Metagenomic functions with discriminative power between healthy and neoplastic specimens were established...
November 9, 2017: Genes
https://www.readbyqxmd.com/read/29118555/current-and-future-biomarkers-in-colorectal-cancer
#19
REVIEW
George Zarkavelis, Stergios Boussios, Alexandra Papadaki, Konstantinos H Katsanos, Dimitrios K Christodoulou, George Pentheroudakis
Colorectal cancer (CRC), one of the leading causes of death among cancer patients, is a heterogeneous disease and is characterized by diversions in multiple molecular pathways throughout its evolutionary process. To date, specific mutations in RAS and RAF genes are tested in everyday clinical practice along with mismatch repair gene deficiency, serving either as prognostic or predictive biomarkers, providing information for patient risk stratification and the choice of appropriate therapy. However, ongoing studies are focusing on the potential role of recently discovered genetic and epigenetic alterations in the management of CRC patients and their potential prognostic or predictive value...
2017: Annals of Gastroenterology: Quarterly Publication of the Hellenic Society of Gastroenterology
https://www.readbyqxmd.com/read/29117097/preparation-and-bioactivity-assessment-of-chitosan-1-acetic-acid-5-flurouracil-conjugates-as-cancer-prodrugs
#20
Mohsin O Mohammed, Kameran S Hussain, Nadia Q Haj
5-fluorouracil (5-FU) is a specific anti-cancer agent that is generally used to treat gastrointestinal, colorectal, and breast cancer. In this work, chitosan (CS) was extracted from local fish scales using an established method. 5-FU was then converted to 1-acetic acid-5-fluorouracil (FUAC) and reacted with this CS to prepare chitosan-1-acetic acid-5-fluorouracil (CS-FUAC) conjugates as a colon-specific prodrug. All compounds were characterized by Proton nuclear magnetic resonance (¹H-NMR), Fourier-transform infrared (FTIR), and UV-visible spectroscopy...
November 8, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
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