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Tumour heterogeneity

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https://www.readbyqxmd.com/read/28210916/a-multiscale-mathematical-model-of-tumour-invasive-growth
#1
Lu Peng, Dumitru Trucu, Ping Lin, Alastair Thompson, Mark A J Chaplain
Known as one of the hallmarks of cancer (Hanahan and Weinberg in Cell 100:57-70, 2000) cancer cell invasion of human body tissue is a complicated spatio-temporal multiscale process which enables a localised solid tumour to transform into a systemic, metastatic and fatal disease. This process explores and takes advantage of the reciprocal relation that solid tumours establish with the extracellular matrix (ECM) components and other multiple distinct cell types from the surrounding microenvironment. Through the secretion of various proteolytic enzymes such as matrix metalloproteinases or the urokinase plasminogen activator (uPA), the cancer cell population alters the configuration of the surrounding ECM composition and overcomes the physical barriers to ultimately achieve local cancer spread into the surrounding tissue...
February 16, 2017: Bulletin of Mathematical Biology
https://www.readbyqxmd.com/read/28210802/poorly-differentiated-colorectal-neuroendocrine-tumour-ct-differentiation-from-well-differentiated-neuroendocrine-tumour-and-poorly-differentiated-adenocarcinomas
#2
Ji Hee Kang, Se Hyung Kim, Joon Koo Han
OBJECTIVE: The differentiation of poorly-differentiated neuroendocrine tumours (PD-NETs), well-differentiated NETs (WD-NETs), and adenocarcinomas (ADCs) is important due to different management options and prognoses. This study is to find the differential CT features of colorectal PD-NETs from WD-NETs and ADCs. MATERIALS AND METHODS: CT features of 25 colorectal WD-NETs, 36 PD-NETs, and 36 ADCs were retrospectively reviewed. Significant variables were assessed using univariate and multivariate analyses...
February 16, 2017: European Radiology
https://www.readbyqxmd.com/read/28203177/liposarcoma-of-the-spermatic-cord-an-infrequent-pathology
#3
Marcelo Di Gregorio, Lionel D'Hondt, Francis Lorge, Marie-Cécile Nollevaux
OBJECTIVE: To describe a rare pathology, the liposarcoma of the spermatic cord (LSC), and discuss its diagnosis and treatment. MATERIALS AND METHODS: We report a case of well-differentiated LSC in a 61-year-old man. The main complaint was painless enlargement in the right inguinoscrotal area that appeared 6 months prior to presentation. Ultrasonography showed a heterogeneous and hyperechogenic mass of the right spermatic cord that was highly suspicious of malignancy...
January 2017: Case Reports in Oncology
https://www.readbyqxmd.com/read/28202655/constraints-in-cancer-evolution
#4
REVIEW
Subramanian Venkatesan, Nicolai J Birkbak, Charles Swanton
Next-generation deep genome sequencing has only recently allowed us to quantitatively dissect the extent of heterogeneity within a tumour, resolving patterns of cancer evolution. Intratumour heterogeneity and natural selection contribute to resistance to anticancer therapies in the advanced setting. Recent evidence has also revealed that cancer evolution might be constrained. In this review, we discuss the origins of intratumour heterogeneity and subsequently focus on constraints imposed upon cancer evolution...
February 8, 2017: Biochemical Society Transactions
https://www.readbyqxmd.com/read/28202626/cancer-cells-exhibit-clonal-diversity-in-phenotypic-plasticity
#5
Robert Austin Mathis, Ethan S Sokol, Piyush B Gupta
Phenotypic heterogeneity in cancers is associated with invasive progression and drug resistance. This heterogeneity arises in part from the ability of cancer cells to switch between phenotypic states, but the dynamics of this cellular plasticity remain poorly understood. Here we apply DNA barcodes to quantify and track phenotypic plasticity across hundreds of clones in a population of cancer cells exhibiting epithelial or mesenchymal differentiation phenotypes. We find that the epithelial-to-mesenchymal cell ratio is highly variable across the different clones in cancer cell populations, but remains stable for many generations within the progeny of any single clone-with a heritability of 0...
February 2017: Open Biology
https://www.readbyqxmd.com/read/28202367/exosomes-therapy-delivery-tools-and-biomarkers-of-diseases
#6
REVIEW
Lucio Barile, Giuseppe Vassalli
Virtually all cells in the organism secrete extracellular vesicles (EVs), a heterogeneous population of lipid bilayer membrane-enclosed vesicles that transport and deliver payloads of proteins and nucleic acids to recipient cells, thus playing central roles in cell-cell communications. Exosomes, nanosized EVs of endosomal origin, regulate many pathophysiological processes including immune responses and inflammation, tumour growth, and infection. Healthy subjects and patients with different diseases release exosomes with different RNA and protein contents into the circulation, which can be measured as biomarkers...
February 12, 2017: Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28197883/central-airway-pathology-clinic-features-ct-findings-with-pathologic-and-virtual-endoscopy-correlation
#7
REVIEW
Daniel Barnes, José Gutiérrez Chacoff, Mariana Benegas, Rosario J Perea, Teresa M de Caralt, José Ramirez, Ivan Vollmer, Marcelo Sanchez
OBJECTIVES: To describe the imaging features of the central airway pathology, correlating the findings with those in pathology and virtual endoscopy. To propose a schematic and practical approach to reach diagnoses, placing strong emphasis on multidetector computed tomography (MDCT) findings. METHODS: We reviewed our thoracic pathology database and the central airway pathology-related literature. Best cases were selected to illustrate the main features of each disease...
February 15, 2017: Insights Into Imaging
https://www.readbyqxmd.com/read/28196297/targeting-invasive-properties-of-melanoma-cells
#8
REVIEW
Imanol Arozarena, Claudia Wellbrock
Melanoma is a skin cancer notorious for its metastatic potential. As an initial step of the metastatic cascade melanoma cells part from the primary tumour and invade the surrounding tissue, which is crucial for their dissemination and the formation of distant secondary tumours. Over the last two decades our understanding of both, general and melanoma specific mechanisms of invasion has significantly improved, but to date no efficient therapeutic strategy tackling the invasive properties of melanoma cells has reached the clinic...
February 14, 2017: FEBS Journal
https://www.readbyqxmd.com/read/28196064/mt4-mmp-and-egfr-expression-levels-are-key-biomarkers-for-breast-cancer-patient-response-to-chemotherapy-and-erlotinib
#9
Cassandre Yip, Pierre Foidart, Joan Somja, Alice Truong, Mehdi Lienard, Emilie Feyereisen, Hélène Schroeder, Stéphanie Gofflot, Anne-Françoise Donneau, Joëlle Collignon, Philippe Delvenne, Nor Eddine Sounni, Guy Jerusalem, Agnès Noël
BACKGROUND: Triple-negative breast cancers (TNBC) are heterogeneous cancers with poor prognosis. We aimed to determine the clinical relevance of membrane type-4 matrix metalloproteinase (MT4-MMP), a membrane type matrix metalloproteinase that interacts with epidermal growth factor receptor (EGFR) overexpressed in >50% of TNBC. METHODS: We conducted a retrospective immunohistochemical analysis on human TNBC samples (n=81) and validated our findings in in vitro and in vivo assays...
February 14, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28195267/a-puzzling-ovarian-tumour-pregnancy-luteoma-with-diffuse-endometriosis
#10
F Limaiem, S Bouraoui, S Bouslama, A Lahmar, S Mzabi
BACKGROUND: Pregnancy luteoma is a distinctive non-neoplastic hormone dependent lesion arising in pregnancy and mimicking an ovarian tumour. Fewer than 200 cases have been described in the English-language literature. Its clinical and morphological features are characteristic and must be considered in order to prevent diagnostic misinterpretation. To the best of our knowledge the association of pregnancy luteoma with endometriosis has not been reported in literature to date. CASE REPORT: A 30-year-old pregnant woman with no particular past medical history, consulted her gynaecologist at 17 weeks gestation for routine check-up...
September 2016: Pathologica
https://www.readbyqxmd.com/read/28194228/guidelines-for-the-management-of-neuroendocrine-tumours-by-the-brazilian-gastrointestinal-tumour-group
#11
Rachel P Riechelmann, Rui F Weschenfelder, Frederico P Costa, Aline Chaves Andrade, Alessandro Bersch Osvaldt, Ana Rosa P Quidute, Allan Dos Santos, Ana Amélia O Hoff, Brenda Gumz, Carlos Buchpiguel, Bruno S Vilhena Pereira, Delmar Muniz Lourenço Junior, Duilio Reis da Rocha Filho, Eduardo Antunes Fonseca, Eduardo Linhares Riello Mello, Fabio Ferrari Makdissi, Fabio Luiz Waechter, Francisco Cesar Carnevale, George B Coura-Filho, Gustavo Andrade de Paulo, Gustavo Colagiovanni Girotto, João Evangelista Bezerra Neto, João Glasberg, Jose Claudio Casali-da-Rocha, Juliana Florinda M Rego, Luciana Rodrigues de Meirelles, Ludhmila Hajjar, Marcos Menezes, Marcello D Bronstein, Marcelo Tatit Sapienza, Maria Candida Barisson Villares Fragoso, Maria Adelaide Albergaria Pereira, Milton Barros, Nora Manoukian Forones, Paulo Cezar Galvão do Amaral, Raphael Salles Scortegagna de Medeiros, Raphael L C Araujo, Regis Otaviano França Bezerra, Renata D'Alpino Peixoto, Samuel Aguiar, Ulysses Ribeiro, Tulio Pfiffer, Paulo M Hoff, Anelisa K Coutinho
Neuroendocrine tumours are a heterogeneous group of diseases with a significant variety of diagnostic tests and treatment modalities. Guidelines were developed by North American and European groups to recommend their best management. However, local particularities and relativisms found worldwide led us to create Brazilian guidelines. Our consensus considered the best feasible strategies in an environment involving more limited resources. We believe that our recommendations may be extended to other countries with similar economic standards...
2017: Ecancermedicalscience
https://www.readbyqxmd.com/read/28193548/advances-in-understanding-tumour-evolution-through-single-cell-sequencing
#12
Jack Kuipers, Katharina Jahn, Niko Beerenwinkel
The mutational heterogeneity observed within tumours poses additional challenges to the development of effective cancer treatments. A thorough understanding of a tumour's subclonal composition and its mutational history is essential to open up the design of treatments tailored to individual patients. Comparative studies on a large number of tumours permit the identification of mutational patterns which may refine forecasts of cancer progression, response to treatment and metastatic potential. The composition of tumours is shaped by evolutionary processes...
February 11, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28191804/does-alternative-and-traditional-wasam-local-cautery-therapy-facilitate-an-early-and-more-extensive-locoregional-metastasis-of-breast-cancer
#13
(no author information available yet)
INTRODUCTION: A large heterogeneous group of unproven remedies exist to treat cancer in both developed and developing countries. Some of these remedies often do more harm than good to the patients. The traditional medicine is the sum total of the knowledge, skills, and practices based on the theories, beliefs, and experiences indigenous to different cultures. The traditional medicine in Oman is based on herbal treatment and skin treatment (massage, Cupping and skin burn "cautery" treatment-known as Wasam or Kaiy)...
September 2016: Gulf Journal of Oncology
https://www.readbyqxmd.com/read/28186346/variations-in-outcomes-for-indigenous-women-with-breast-cancer-in-australia-a-systematic-review
#14
REVIEW
P Dasgupta, P D Baade, D R Youlden, G Garvey, J F Aitken, I Wallington, J Chynoweth, H Zorbas, D Roder, P H Youl
This systematic review examines variations in outcomes along the breast cancer continuum for Australian women by Indigenous status. Multiple databases were systematically searched for peer-reviewed articles published from 1 January 1990 to 1 March 2015 focussing on adult female breast cancer patients in Australia and assessing survival, patient and tumour characteristics, diagnosis and treatment by Indigenous status. Sixteen quantitative studies were included with 12 rated high, 3 moderate and 1 as low quality...
February 10, 2017: European Journal of Cancer Care
https://www.readbyqxmd.com/read/28186126/molecular-dissection-of-colorectal-cancer-in-pre-clinical-models-identifies-biomarkers-predicting-sensitivity-to-egfr-inhibitors
#15
Moritz Schütte, Thomas Risch, Nilofar Abdavi-Azar, Karsten Boehnke, Dirk Schumacher, Marlen Keil, Reha Yildiriman, Christine Jandrasits, Tatiana Borodina, Vyacheslav Amstislavskiy, Catherine L Worth, Caroline Schweiger, Sandra Liebs, Martin Lange, Hans-Jörg Warnatz, Lee M Butcher, James E Barrett, Marc Sultan, Christoph Wierling, Nicole Golob-Schwarzl, Sigurd Lax, Stefan Uranitsch, Michael Becker, Yvonne Welte, Joseph Lewis Regan, Maxine Silvestrov, Inge Kehler, Alberto Fusi, Thomas Kessler, Ralf Herwig, Ulf Landegren, Dirk Wienke, Mats Nilsson, Juan A Velasco, Pilar Garin-Chesa, Christoph Reinhard, Stephan Beck, Reinhold Schäfer, Christian R A Regenbrecht, David Henderson, Bodo Lange, Johannes Haybaeck, Ulrich Keilholz, Jens Hoffmann, Hans Lehrach, Marie-Laure Yaspo
Colorectal carcinoma represents a heterogeneous entity, with only a fraction of the tumours responding to available therapies, requiring a better molecular understanding of the disease in precision oncology. To address this challenge, the OncoTrack consortium recruited 106 CRC patients (stages I-IV) and developed a pre-clinical platform generating a compendium of drug sensitivity data totalling >4,000 assays testing 16 clinical drugs on patient-derived in vivo and in vitro models. This large biobank of 106 tumours, 35 organoids and 59 xenografts, with extensive omics data comparing donor tumours and derived models provides a resource for advancing our understanding of CRC...
February 10, 2017: Nature Communications
https://www.readbyqxmd.com/read/28183782/telomere-maintenance-in-soft-tissue-sarcomas
#16
REVIEW
Nicholas Eastley, Barbara Ottolini, Carmen Garrido, Jacqueline A Shaw, Thomas Alasdair McCulloch, Robert U Ashford, Nicola J Royle
Soft tissue sarcomas (STS) are a diverse group of heterogeneous malignant tumours derived from mesenchymal tissues. Over 50 different STS subtypes are recognised by WHO, which show a wide range of different biological behaviours and prognoses. At present, clinicians managing this complex group of tumours face several challenges. This is reflected by the relatively poor outcome of patients with STSs compared with many other solid malignant tumours. These include difficulties securing accurate diagnoses, a lack of effective systemic treatments and absence of any sensitive circulating biomarkers to monitor patients throughout their treatment and follow-up...
February 9, 2017: Journal of Clinical Pathology
https://www.readbyqxmd.com/read/28183139/cancer-treatment-scheduling-and-dynamic-heterogeneity-in-social-dilemmas-of-tumour-acidity-and-vasculature
#17
Artem Kaznatcheev, Robert Vander Velde, Jacob G Scott, David Basanta
BACKGROUND: Tumours are diverse ecosystems with persistent heterogeneity in various cancer hallmarks like self-sufficiency of growth factor production for angiogenesis and reprogramming of energy metabolism for aerobic glycolysis. This heterogeneity has consequences for diagnosis, treatment and disease progression. METHODS: We introduce the double goods game to study the dynamics of these traits using evolutionary game theory. We model glycolytic acid production as a public good for all tumour cells and oxygen from vascularisation via vascular endothelial growth factor production as a club good benefiting non-glycolytic tumour cells...
February 9, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28179442/t-helper-cell-type-2-th2-and-non-th2-molecular-phenotypes-of-asthma-using-sputum-transcriptomics-in-u-biopred
#18
Chih-Hsi Scott Kuo, Stelios Pavlidis, Matthew Loza, Fred Baribaud, Anthony Rowe, Iaonnis Pandis, Ana Sousa, Julie Corfield, Ratko Djukanovic, Rene Lutter, Peter J Sterk, Charles Auffray, Yike Guo, Ian M Adcock, Kian Fan Chung
Asthma is characterised by heterogeneous clinical phenotypes. Our objective was to determine molecular phenotypes of asthma by analysing sputum cell transcriptomics from 104 moderate-to-severe asthmatic subjects and 16 nonasthmatic subjects.After filtering on the differentially expressed genes between eosinophil- and noneosinophil-associated sputum inflammation, we used unbiased hierarchical clustering on 508 differentially expressed genes and gene set variation analysis of specific gene sets.We defined three transcriptome-associated clusters (TACs): TAC1 (characterised by immune receptors IL33R, CCR3 and TSLPR), TAC2 (characterised by interferon-, tumour necrosis factor-α- and inflammasome-associated genes) and TAC3 (characterised by genes of metabolic pathways, ubiquitination and mitochondrial function)...
February 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/28178969/neuroblastoma-treatment-in-the-post-genomic-era
#19
REVIEW
Maria Rosaria Esposito, Sanja Aveic, Anke Seydel, Gian Paolo Tonini
Neuroblastoma is an embryonic malignancy of early childhood originating from neural crest cells and showing heterogeneous biological, morphological, genetic and clinical characteristics. The correct stratification of neuroblastoma patients within risk groups (low, intermediate, high and ultra-high) is critical for the adequate treatment of the patients.High-throughput technologies in the Omics disciplines are leading to significant insights into the molecular pathogenesis of neuroblastoma. Nonetheless, further study of Omics data is necessary to better characterise neuroblastoma tumour biology...
February 8, 2017: Journal of Biomedical Science
https://www.readbyqxmd.com/read/28178237/extrachromosomal-oncogene-amplification-drives-tumour-evolution-and-genetic-heterogeneity
#20
Kristen M Turner, Viraj Deshpande, Doruk Beyter, Tomoyuki Koga, Jessica Rusert, Catherine Lee, Bin Li, Karen Arden, Bing Ren, David A Nathanson, Harley I Kornblum, Michael D Taylor, Sharmeela Kaushal, Webster K Cavenee, Robert Wechsler-Reya, Frank B Furnari, Scott R Vandenberg, P Nagesh Rao, Geoffrey M Wahl, Vineet Bafna, Paul S Mischel
Human cells have twenty-three pairs of chromosomes. In cancer, however, genes can be amplified in chromosomes or in circular extrachromosomal DNA (ecDNA), although the frequency and functional importance of ecDNA are not understood. We performed whole-genome sequencing, structural modelling and cytogenetic analyses of 17 different cancer types, including analysis of the structure and function of chromosomes during metaphase of 2,572 dividing cells, and developed a software package called ECdetect to conduct unbiased, integrated ecDNA detection and analysis...
February 8, 2017: Nature
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