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Tumour heterogeneity

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https://www.readbyqxmd.com/read/28726916/a-novel-3-d-bio-microfluidic-system-mimicking-in-vivo-heterogeneous-tumour-microstructures-reveals-complex-tumour-stroma-interactions
#1
Qihui Fan, Ruchuan Liu, Yang Jiao, Chunxiu Tian, James D Farrell, Wenwen Diao, Xiaochen Wang, Fengrong Zhang, Wei Yuan, Haibo Han, Jinfeng Chen, Yue Yang, Xixiang Zhang, Fangfu Ye, Ming Li, Zhongcan Ouyang, Liyu Liu
A 3-D microfluidic system consisting of microchamber arrays embedded in a collagen hydrogel with tuneable biochemical gradients that mimics the tumour microenvironment of mammary glands was constructed for the investigation on the interactions between invasive breast cancer cells and stromal cells. The hollow microchambers in collagen provide a very similar 3-D environment to that in vivo that regulates collective cellular dynamics and behaviour, while the microfluidic channels surrounding the collagen microchamber arrays allow one to impose complex concentration gradients of specific biological molecules or drugs...
July 20, 2017: Lab on a Chip
https://www.readbyqxmd.com/read/28726821/the-whole-genome-landscape-of-medulloblastoma-subtypes
#2
Paul A Northcott, Ivo Buchhalter, A Sorana Morrissy, Volker Hovestadt, Joachim Weischenfeldt, Tobias Ehrenberger, Susanne Gröbner, Maia Segura-Wang, Thomas Zichner, Vasilisa A Rudneva, Hans-Jörg Warnatz, Nikos Sidiropoulos, Aaron H Phillips, Steven Schumacher, Kortine Kleinheinz, Sebastian M Waszak, Serap Erkek, David T W Jones, Barbara C Worst, Marcel Kool, Marc Zapatka, Natalie Jäger, Lukas Chavez, Barbara Hutter, Matthias Bieg, Nagarajan Paramasivam, Michael Heinold, Zuguang Gu, Naveed Ishaque, Christina Jäger-Schmidt, Charles D Imbusch, Alke Jugold, Daniel Hübschmann, Thomas Risch, Vyacheslav Amstislavskiy, Francisco German Rodriguez Gonzalez, Ursula D Weber, Stephan Wolf, Giles W Robinson, Xin Zhou, Gang Wu, David Finkelstein, Yanling Liu, Florence M G Cavalli, Betty Luu, Vijay Ramaswamy, Xiaochong Wu, Jan Koster, Marina Ryzhova, Yoon-Jae Cho, Scott L Pomeroy, Christel Herold-Mende, Martin Schuhmann, Martin Ebinger, Linda M Liau, Jaume Mora, Roger E McLendon, Nada Jabado, Toshihiro Kumabe, Eric Chuah, Yussanne Ma, Richard A Moore, Andrew J Mungall, Karen L Mungall, Nina Thiessen, Kane Tse, Tina Wong, Steven J M Jones, Olaf Witt, Till Milde, Andreas Von Deimling, David Capper, Andrey Korshunov, Marie-Laure Yaspo, Richard Kriwacki, Amar Gajjar, Jinghui Zhang, Rameen Beroukhim, Ernest Fraenkel, Jan O Korbel, Benedikt Brors, Matthias Schlesner, Roland Eils, Marco A Marra, Stefan M Pfister, Michael D Taylor, Peter Lichter
Current therapies for medulloblastoma, a highly malignant childhood brain tumour, impose debilitating effects on the developing child, and highlight the need for molecularly targeted treatments with reduced toxicity. Previous studies have been unable to identify the full spectrum of driver genes and molecular processes that operate in medulloblastoma subgroups. Here we analyse the somatic landscape across 491 sequenced medulloblastoma samples and the molecular heterogeneity among 1,256 epigenetically analysed cases, and identify subgroup-specific driver alterations that include previously undiscovered actionable targets...
July 19, 2017: Nature
https://www.readbyqxmd.com/read/28723472/human-prostate-tissue-derived-extracellular-matrix-as-a-model-of-prostate-microenvironment
#3
Walter Cazzaniga, Manuela Nebuloni, Erika Longhi, Irene Locatelli, Raffaele Allevi, Roberta Lucianò, Gelsomina Senatore, Eugenio Ventimiglia, Vito Cucchiara, Luca Genovese, Francesco Montorsi, Massimo Alfano, Andrea Salonia, Ilaria Cavarretta
BACKGROUND: Clinical experience highlights the wide heterogeneity of primary prostate cancer (PPCa), even when potentially related to the same grade and stage. Currently available prediction tools and biomarkers do not always allow for early recognition of PPCa aggressive phenotype, sometimes making it impossible to distinguish among men harbouring indolent tumours or life-threatening disease. OBJECTIVE: To establish a novel ex vivo/in vitro model suitable to estimate the invasive phenotype of PPCa cells (PPCaC)...
October 2016: European Urology Focus
https://www.readbyqxmd.com/read/28720260/cancer-survivorship-advancing-the-concept-in-the-context-of-colorectal-cancer
#4
REVIEW
Amanda Drury, Sheila Payne, Anne-Marie Brady
PURPOSE: Previous conceptualizations of cancer survivorship have focused on heterogeneous cancer survivors, with little consideration of the validity of conclusions for homogeneous tumour groups. This paper aims to examine the concept of cancer survivorship in the context of colorectal cancer (CRC). METHOD: Rodgers' (1989) Evolutionary Method of Concept Analysis guided this study. A systematic search of PUBMED, CINAHL, PsycINFO and The Cochrane Library was conducted in November 2016 to identify studies of CRC survivorship...
August 2017: European Journal of Oncology Nursing: the Official Journal of European Oncology Nursing Society
https://www.readbyqxmd.com/read/28718513/the-fine-needle-aspiration-of-translocation-sarcomas
#5
C J VandenBussche, C L Adams, O G McDonald, S A Whitworth, S Z Ali
INTRODUCTION: Soft tissue sarcomas comprise a heterogeneous group of clinically aggressive cancers that are often hard to classify on limited cytological samples. "Translocation sarcomas" (TS) are a diverse subset of such cancers, different from pleomorphic sarcomas, and characterised by unique single chromosomal translocations in each sarcoma subtype. Interestingly, despite their high-grade biological behaviour, TS have deceptively monotonous and bland cytomorphology, therefore creating diagnostic issues on limited samples...
July 17, 2017: Cytopathology: Official Journal of the British Society for Clinical Cytology
https://www.readbyqxmd.com/read/28718071/cancer-survival-in-adult-patients-in-spain-results-from-nine-population-based-cancer-registries
#6
M D Chirlaque, D Salmerón, J Galceran, A Ameijide, A Mateos, A Torrella, R Jiménez, N Larrañaga, R Marcos-Gragera, E Ardanaz, M Sant, P Minicozzi, C Navarro, M J Sánchez
INTRODUCTION: With the aim of providing cancer control indicators, this work presents cancer survival in adult (≥15 years) patients in Spain diagnosed during the period 2000-2007 from Spanish cancer registries participating in the EUROCARE project. METHODS: Cancer cases from nine Spanish population-based cancer registries were included and analysed as a whole. All primary malignant neoplasms diagnosed in adult patients were eligible for the analysis. Cancer patients were followed until 31 December 2008...
July 17, 2017: Clinical & Translational Oncology
https://www.readbyqxmd.com/read/28716075/the-role-of-tumour-heterogeneity-and-clonal-cooperativity-in-metastasis-immune-evasion-and-clinical-outcome
#7
REVIEW
Deborah R Caswell, Charles Swanton
BACKGROUND: The advent of rapid and inexpensive sequencing technology allows scientists to decipher heterogeneity within primary tumours, between primary and metastatic sites, and between metastases. Charting the evolutionary history of individual tumours has revealed drivers of tumour heterogeneity and highlighted its impact on therapeutic outcomes. DISCUSSION: Scientists are using improved sequencing technologies to characterise and address the challenge of tumour heterogeneity, which is a major cause of resistance to therapy and relapse...
July 18, 2017: BMC Medicine
https://www.readbyqxmd.com/read/28715775/evolution-of-anti-her2-therapies-for-cancer-treatment
#8
REVIEW
Sagun Parakh, Hui K Gan, Adam C Parslow, Ingrid J G Burvenich, Antony W Burgess, Andrew M Scott
The development of HER2-directed monoclonal antibodies and tyrosine kinase inhibitors have provided benefits to cancer patients, as well as produced many insights into the biology of the ErbB receptor family. Current therapies based on ErbB family members have resulted in improved overall survival with associated improvements in quality of life for the cancer patients that respond to treatment. Compared to monotherapy using either two antibodies to block the HER2 receptor blockade or combinatorial approaches with HER2 antibodies and standard therapies has provided additional benefits...
July 6, 2017: Cancer Treatment Reviews
https://www.readbyqxmd.com/read/28713573/a-monograph-proposing-the-use-of-canine-mammary-tumours-as-a-model-for-the-study-of-hereditary-breast-cancer-susceptibility-genes-in-humans
#9
REVIEW
Katie Goebel, Nancy D Merner
Canines are excellent models for cancer studies due to their similar physiology and genomic sequence to humans, companion status and limited intra-breed heterogeneity. Due to their affliction to mammary cancers, canines can serve as powerful genetic models of hereditary breast cancers. Variants within known human breast cancer susceptibility genes only explain a fraction of familial cases. Thus, further discovery is necessary but such efforts have been thwarted by genetic heterogeneity. Reducing heterogeneity is key, and studying isolated human populations have helped in the endeavour...
May 2017: Veterinary Medicine and Science
https://www.readbyqxmd.com/read/28709644/horizontal-transfer-of-mir-106a-b-from-cisplatin-resistant-hepatocarcinoma-cells-can-alter-the-sensitivity-of-cervical-cancer-cells-to-cisplatin
#10
Grace R Raji, T V Sruthi, Lincy Edatt, K Haritha, S Sharath Shankar, V B Sameer Kumar
Recent studies indicate that horizontal transfer of genetic material can act as a communication tool between heterogenous populations of tumour cells, thus altering the chemosensitivity of tumour cells. The present study was designed to check whether the horizontal transfer of miRNAs released by cisplatin resistant (Cp-r) Hepatocarcinoma cells can alter the sensitivity of cervical cancer cells. For this exosomes secreted by cisplatin resistant and cisplatin sensitive HepG2 cells (EXres and EXsen) were isolated and characterised...
July 11, 2017: Cellular Signalling
https://www.readbyqxmd.com/read/28707055/histological-heterogeneity-in-primary-and-metastatic-classic-combined-hepatocellular-cholangiocarcinoma-a-case-series
#11
Claudio De Vito, Debashis Sarker, Paul Ross, Nigel Heaton, Alberto Quaglia
Combined hepatocellular-cholangiocarcinoma (cHCC-CC) is a rare and aggressive primary liver cancer with both hepatocellular and cholangiocellular differentiation. Due to its bi-phenotypic component, cHCC-CC is a heterogeneous tumour and histopathological analysis of metastatic deposits is poorly characterized. In this retrospective study, we describe four patients in whom the histology from resected specimens of both primary and recurrent and/or metastatic tumour was available for comparison and immunohistochemical characterization...
July 13, 2017: Virchows Archiv: An International Journal of Pathology
https://www.readbyqxmd.com/read/28704644/amide-proton-transfer-weighted-magnetic-resonance-image-guided-stereotactic-biopsy-in-patients-with-newly-diagnosed-gliomas
#12
Shanshan Jiang, Charles G Eberhart, Yi Zhang, Hye-Young Heo, Zhibo Wen, Lindsay Blair, Huamin Qin, Michael Lim, Alfredo Quinones-Hinojosa, Jon D Weingart, Peter B Barker, Martin G Pomper, John Laterra, Peter C M van Zijl, Jaishri O Blakeley, Jinyuan Zhou
PURPOSE: Pathological assessment using World Health Organization (WHO) criteria is the gold standard for diagnosis of gliomas. However, the accuracy of diagnosis is limited by tissue sampling, particularly for infiltrating, heterogeneous tumours. We assessed the accuracy of amide proton transfer-weighted (APTw) magnetic resonance imaging (MRI)-guided tissue sampling to identify regions of high-grade glioma via radiographic-histopathologic correlation in patients with newly suspected glioma...
July 10, 2017: European Journal of Cancer
https://www.readbyqxmd.com/read/28701188/tall-height-and-obesity-are-associated-with-an-increased-risk-of-aggressive-prostate-cancer-results-from-the-epic-cohort-study
#13
Aurora Perez-Cornago, Paul N Appleby, Tobias Pischon, Konstantinos K Tsilidis, Anne Tjønneland, Anja Olsen, Kim Overvad, Rudolf Kaaks, Tilman Kühn, Heiner Boeing, Annika Steffen, Antonia Trichopoulou, Pagona Lagiou, Maria Kritikou, Vittorio Krogh, Domenico Palli, Carlotta Sacerdote, Rosario Tumino, H Bas Bueno-de-Mesquita, Antonio Agudo, Nerea Larrañaga, Elena Molina-Portillo, Aurelio Barricarte, Maria-Dolores Chirlaque, J Ramón Quirós, Pär Stattin, Christel Häggström, Nick Wareham, Kay-Tee Khaw, Julie A Schmidt, Marc Gunter, Heinz Freisling, Dagfinn Aune, Heather Ward, Elio Riboli, Timothy J Key, Ruth C Travis
BACKGROUND: The relationship between body size and prostate cancer risk, and in particular risk by tumour characteristics, is not clear because most studies have not differentiated between high-grade or advanced stage tumours, but rather have assessed risk with a combined category of aggressive disease. We investigated the association of height and adiposity with incidence of and death from prostate cancer in 141,896 men in the European Prospective Investigation into Cancer and Nutrition (EPIC) cohort...
July 13, 2017: BMC Medicine
https://www.readbyqxmd.com/read/28700326/isolation-and-detection-of-circulating-tumour-cells-from-metastatic-melanoma-patients-using-a-slanted-spiral-microfluidic-device
#14
Carlos A Aya-Bonilla, Gabriela Marsavela, James B Freeman, Chris Lomma, Markus H Frank, Muhammad A Khattak, Tarek M Meniawy, Michael Millward, Majid E Warkiani, Elin S Gray, Mel Ziman
Circulating Tumour Cells (CTCs) are promising cancer biomarkers. Several methods have been developed to isolate CTCs from blood samples. However, the isolation of melanoma CTCs is very challenging as a result of their extraordinary heterogeneity, which has hindered their biological and clinical study. Thus, methods that isolate CTCs based on their physical properties, rather than surface marker expression, such as microfluidic devices, are greatly needed in melanoma. Here, we assessed the ability of the slanted spiral microfluidic device to isolate melanoma CTCs via label-free enrichment...
June 27, 2017: Oncotarget
https://www.readbyqxmd.com/read/28698330/clinical-characteristics-of-importance-to-outcome-in-patients-with-axial-spondyloarthritis-protocol-for-a-prospective-descriptive-and-exploratory-cohort-study
#15
Rikke Asmussen Andreasen, Lars Erik Kristensen, Torkell Ellingsen, Robin Christensen, Xenofon Baraliakos, Jimmi Wied, Claus Aalykke, Thomas Ulstrup, Berit Schiøttz-Christensen, Hans Christian Horn, Amir Emamifar, Bent Duerlund, Lars Fischer, Inger Marie Jensen Hansen
INTRODUCTION: Spondyloarthritis (SpA) is a heterogeneous spectrum of rheumatic diseases with either predominantly axial inflammatory symptoms of the spine and sacroiliac joints or predominantly peripheral arthritis. The two main entities of axial SpA (axSpA) are ankylosing spondylitis or non-radiographic axSpA (nr-axSpA). Tumour necrosis factor-α inhibitors have revolutionised the treatment of patients with axSpA who failed to respond to non-steroidal anti-inflammatory drugs and physical therapy...
July 10, 2017: BMJ Open
https://www.readbyqxmd.com/read/28695884/late-solitary-pelvic-metastasis-of-hepatocellular-carcinoma-mimicking-alpha-fetoprotein-producing-gynaecologic-tumour
#16
Ji He Kim, Gun Oh Chong, Hyung Jun Kwon, Yoon Hee Lee, Dae Gy Hong
Extrahepatic spread of hepatocellular carcinoma (HCC) is uncommon; and, pelvic metastasis, in particular, is extremely rare. A 71-year-old woman was admitted for evaluation of pelvic solitary solid mass. She had undergone a left lobectomy 28 years previously. Magnetic resonance imaging of the abdomen and pelvis demonstrated a heterogeneous mass in the right pelvic cavity, whereas no space-occupying lesions or ascites were detected in the liver. CA 125 levels were within normal limits; however, serum alpha-fetoprotein levels were markedly elevated...
July 7, 2017: Journal of Minimal Access Surgery
https://www.readbyqxmd.com/read/28692949/adjuvant-interferon-%C3%AE-for-the-treatment-of-high-risk-melanoma-an-individual-patient-data-meta-analysis
#17
REVIEW
Natalie J Ives, Stefan Suciu, Alexander M M Eggermont, John Kirkwood, Paul Lorigan, Svetomir N Markovic, Claus Garbe, Keith Wheatley
BACKGROUND: Many randomised trials assessing interferon-α (IFN-α) as adjuvant therapy for high-risk malignant melanoma have been undertaken. To better assess the role of IFN-α, an individual patient data (IPD) meta-analysis of these trials was undertaken. METHODS: IPD was sought from all randomised trials of adjuvant IFN-α versus no IFN-α for high-risk melanoma. Primary outcomes were event-free survival (EFS) and overall survival (OS). Standard methods for quantitative IPD meta-analysis were used...
July 7, 2017: European Journal of Cancer
https://www.readbyqxmd.com/read/28688525/heterogeneous-fdg-guided-dose-escalation-for-locally-advanced-nsclc-the-narlal2-trial-design-and-early-dosimetric-results-of-a-randomized-multi-centre-phase-iii-study
#18
Ditte Sloth Møller, Tine Bjørn Nielsen, Carsten Brink, Lone Hoffmann, Christina Maria Lutz, Mikkel Drøgemüller Lund, Olfred Hansen, Tine Schytte, Azza Ahmed Khalil, Marianne Marquard Knap, Christa Haugaard Nyhus, Wiviann Ottosson, Patrik Sibolt, Svetlana Borissova, Mirjana Josipovic, Gitte Persson, Ane Lindegaard Appelt
BACKGROUND AND PURPOSE: Local recurrence is frequent in locally advanced NSCLC and is primarily located in FDG-avid parts of tumour and lymph nodes. Aiming at improving local control without increasing toxicity, we designed a multi-centre phase-III trial delivering inhomogeneous dose-escalation driven by FDG-avid volumes, while respecting normal tissue constraints and requiring no increase in mean lung dose. Dose-escalation driven by FDG-avid volumes, delivering mean doses of 95Gy (tumour) and 74Gy (lymph nodes), was pursued and compared to standard 66Gy/33F plans...
July 5, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/28687916/amide-proton-transfer-imaging-for-differentiation-of-benign-and-atypical-meningiomas
#19
Bio Joo, Kyunghwa Han, Yoon Seong Choi, Seung-Koo Lee, Sung Soo Ahn, Jong Hee Chang, Seok-Gu Kang, Se Hoon Kim, Jinyuan Zhou
PURPOSE: To investigate the difference in amide proton transfer (APT)-weighted signals between benign and atypical meningiomas and determine the value of APT imaging for differentiating the two. METHODS: Fifty-seven patients with pathologically diagnosed meningiomas (benign, 44; atypical, 13), who underwent preoperative MRI with APT imaging between December 2014 and August 2016 were included. We compared normalised magnetisation transfer ratio asymmetry (nMTR asym ) values between benign and atypical meningiomas on APT-weighted images...
July 7, 2017: European Radiology
https://www.readbyqxmd.com/read/28683472/comprehensive-analysis-of-copy-number-aberrations-in-microsatellite-stable-colon-cancer-in-view-of-stromal-component
#20
M Henar Alonso, Susanna Aussó, Adriana Lopez-Doriga, David Cordero, Elisabet Guinó, Xavier Solé, Mercè Barenys, Javier de Oca, Gabriel Capella, Ramón Salazar, Rebeca Sanz-Pamplona, Victor Moreno
BACKGROUND: Somatic copy number aberrations (CNAs) are common acquired changes in cancer cells having an important role in the progression of colon cancer (colorectal cancer, CRC). This study aimed to perform a characterisation of CNA and their impact in gene expression. METHODS: Copy number aberrations were inferred from SNP array data in a series of 99 CRC. Copy number aberration events were calculated and used to assess the association between copy number dosage, clinical and molecular characteristics of the tumours, and gene expression changes...
July 6, 2017: British Journal of Cancer
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