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Tumour heterogeneity

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https://www.readbyqxmd.com/read/28822981/spectrum-of-lymphomas-across-different-drug-treatment-groups-in-rheumatoid-arthritis-a-european-registries-collaborative-project
#1
Louise K Mercer, Anne C Regierer, Xavier Mariette, William G Dixon, Eva Baecklund, Karin Hellgren, Lene Dreyer, Merete Lund Hetland, René Cordtz, Kimme Hyrich, Anja Strangfeld, Angela Zink, Helena Canhao, M Victoria Hernandez, Florence Tubach, Jacques-Eric Gottenberg, Jacques Morel, Jakub Zavada, Florenzo Iannone, Johan Askling, Joachim Listing
BACKGROUND: Lymphomas comprise a heterogeneous group of malignant diseases with highly variable prognosis. Rheumatoid arthritis (RA) is associated with a twofold increased risk of both Hodgkin's lymphoma (HL) and non-Hodgkin's lymphoma (NHL). It is unknown whether treatment with biologic disease-modifying antirheumatic drugs (bDMARDs) affect the risk of specific lymphoma subtypes. METHODS: Patients never exposed to (bionaïve) or ever treated with bDMARDs from 12 European biologic registers were followed prospectively for the occurrence of first ever histologically confirmed lymphoma...
August 19, 2017: Annals of the Rheumatic Diseases
https://www.readbyqxmd.com/read/28812406/types-of-orbital-osteoma-a-descriptive-analysis
#2
Tayyab Afghani, Hassan Mansoor
AIMS: This study describes different types of orbital osteoma based on clinical per-operative morphology and radiological findings to facilitate communication between ophthalmologists and surgical management for a better patient outcome. MATERIALS AND METHODS: The study was conducted in the Orbit and Oculoplastics Department of Al-Shifa Trust Eye Hospital, Rawalpindi, Pakistan, from July 1, 2001 to June 30, 2014. A retrospective analysis of 520 diagnosed orbital tumours who presented to us was carried out and the prevalence of orbital osteoma was determined...
August 16, 2017: Orbit
https://www.readbyqxmd.com/read/28811084/low-tumour-cell-content-in-a-lung-tumour-bank-implications-for-molecular-characterisation
#3
Felicia Goh, Edwina E Duhig, Belinda E Clarke, Elizabeth McCaul, Linda Passmore, Deborah Courtney, Morgan Windsor, Rishendren Naidoo, Louise Franz, Kylie Parsonson, Ian A Yang, Rayleen V Bowman, Kwun M Fong
Lung cancer encompasses multiple malignant epithelial tumour types, each with specific targetable, potentially actionable mutations, such that precision management mandates accurate tumour typing. Molecular characterisation studies require high tumour cell content and low necrosis content, yet lung cancers are frequently a heterogeneous mixture of tumour and stromal cells. We hypothesised that there may be systematic differences in tumour cell content according to histological subtype, and that this may have implications for tumour banks as a resource for comprehensive molecular characterisation studies in lung cancer...
August 12, 2017: Pathology
https://www.readbyqxmd.com/read/28808701/osteosarcoma-of-the-mandible-a-case-report-with-ct-mri-and-scintigraphy
#4
Mikiko Sue, Takaaki Oda, Yoshihiko Sasaki, Ayako Kameta, Yasuo Okada, Ichiro Ogura
Osteosarcomas are especially rare in the mandible and maxilla, representing 1.6% of all bony malignant tumours. In this article, we described a case of osteosarcoma of the mandible. Computed tomography (CT) image showed a well-circumscribed homogeneous mass, with nonhomogeneous contrast enhancement. T1-weighted magnetic resonance imaging (MR) image showed intermediate signal intensity on, and after administration the lesion showed signal intensity lower than muscle. T2-weighted MR image showed heterogeneous high signal intensity...
2017: Chinese Journal of Dental Research
https://www.readbyqxmd.com/read/28807520/egfr-amplification-plus-gene-expression-profiling-predicts-response-to-combined-radiotherapy-with-egfr-inhibition-a-preclinical-trial-in-10-hnscc-tumour-xenograft-models
#5
Lydia Koi, Steffen Löck, Annett Linge, Cedric Thurow, Sandra Hering, Michael Baumann, Mechthild Krause, Kristin Gurtner
BACKGROUND AND PURPOSE: Improvement of the results of radiotherapy by EGFR inhibitors is modest, suggesting significant intertumoural heterogeneity of response. To identify potential biomarkers, a preclinical trial was performed on ten different human squamous cell carcinoma xenografts of the head and neck (HNSCC) studying in vivo and ex vivo the effect of fractionated irradiation and EGFR inhibition. Local tumour control and tumour growth delay were correlated with potential biomarkers, e...
August 11, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/28805868/a-microfluidic-flow-cytometer-enabling-absolute-quantification-of-single-cell-intracellular-proteins
#6
Xiufeng Li, Beiyuan Fan, Shanshan Cao, Deyong Chen, Xiaoting Zhao, Dong Men, Wentao Yue, Junbo Wang, Jian Chen
Quantification of single-cell proteomics provides key insights into cellular heterogeneity while conventional flow cytometry cannot provide absolute quantification of intracellular proteins of single cells due to the lack of calibration approaches. This paper presents a constriction channel (with a cross sectional area smaller than cells) based microfluidic flow cytometer, capable of collecting copy numbers of specific intracellular proteins. In this platform, single cells stained with fluorescence labelled antibodies were forced to squeeze through the constriction channel with the fluorescence intensities quantified and since cells fully filled the constriction channel during the squeezing process, solutions with fluorescence labelled antibodies were flushed into the constriction channel to obtain calibration curves...
August 14, 2017: Lab on a Chip
https://www.readbyqxmd.com/read/28803237/atf3-dependent-regulation-of-egr1-in-vitro-and-in-vivo
#7
Ilona Schoen, Sabine Koitzsch
BACKGROUND/AIMS: Activating transcription factor 3 (ATF3) and early growth response protein 1 (EGR1) are reported to interact, but their use as prognostic factors in cancer is discussed controversially. METHODS: We measured ATF3 and EGR1 gene expression changes in human mini-organ cultures (MOCs) of healthy nasal epithelia, UM-SCC-22B, and FADUDD cells after acid reflux exposure. Next, ATF3 and EGR1 gene expression was analysed in tumour tissues and related to the median expression of autologous reference tissue samples...
August 12, 2017: ORL; Journal for Oto-rhino-laryngology and its related Specialties
https://www.readbyqxmd.com/read/28803232/digestive-system-mixed-neuroendocrine-non-neuroendocrine-neoplasms
#8
Louis de Mestier, Jérôme Cros, Cindy Neuzillet, Olivia Hentic, Axel Egal, Nelly Muller, Olivier Bouché, Guillaume Cadiot, Philippe Ruszniewski, Anne Couvelard, Pascal Hammel
Mixed neuroendocrine-non-neuroendocrine neoplasms (MiNEN) are a heterogeneous subgroup of rare neoplasms that represent about a third of all poorly differentiated neuroendocrine carcinomas (PDNEC). MiNEN combine a neuroendocrine component, usually a PDNEC, and a non-neuroendocrine component, generally an adenocarcinoma, both accounting for at least 30% of the neoplasm. MiNEN are classified as high-, intermediate-, or low-grade malignancies depending on the metastatic potential of the tumour components. High-grade malignant component should be considered even if it represents <30% of the tumour...
August 12, 2017: Neuroendocrinology
https://www.readbyqxmd.com/read/28803033/the-risk-of-tumour-recurrence-in-patients-undergoing-renal-transplantation-for-end-stage-renal-disease-after-previous-treatment-for-a-urological-cancer-a-systematic-review
#9
REVIEW
Romain Boissier, Vital Hevia, Harman Max Bruins, Klemens Budde, Arnaldo Figueiredo, Enrique Lledó-García, Jonathon Olsburgh, Heinz Regele, Claire Fraser Taylor, Rhana Hassan Zakri, Cathy Yuhong Yuan, Alberto Breda
CONTEXT: Renal transplantation is the gold standard renal replacement therapy in end-stage renal disease owing to its superior survival and quality of life compared with dialysis. When the potential recipient has a history of cancer, the waiting period before radiotherapy is usually based on the Cincinnati Registry. OBJECTIVE: To systematically review all available evidence on the risk of cancer recurrence in end-stage renal disease patients with a history of urological cancer...
August 9, 2017: European Urology
https://www.readbyqxmd.com/read/28801444/radical-cystectomy-bladder-removal-against-intravesical-bcg-immunotherapy-for-high-risk-non-muscle-invasive-bladder-cancer-bravo-a-protocol-for-a-randomised-controlled-feasibility-study
#10
Jamie B Oughton, Heather Poad, Maureen Twiddy, Michelle Collinson, Victoria Hiley, Kathryn Gordon, Mark Johnson, Sunjay Jain, Aidan P Noon, Rohit Chahal, Matt Simms, Mohantha Dooldeniya, Phillip Koenig, Louise Goodwin, Julia M Brown, James W F Catto
INTRODUCTION: High-risk non-muscle invasive bladder cancer (HRNMIBC) is a heterogeneous disease that can be difficult to predict. While around 25% of cancers progress to invasion and metastases, the remaining majority of tumours remain within the bladder. It is uncertain whether patients with HRNMIBC are better treated with intravesical maintenance BCG (mBCG) immunotherapy or primary radical cystectomy (RC). A definitive randomised controlled trial (RCT) is needed to compare these two different treatments but may be difficult to recruit to and has not been attempted to date...
August 11, 2017: BMJ Open
https://www.readbyqxmd.com/read/28800767/cell-adhesion-heterogeneity-reinforces-tumour-cell-dissemination-novel-insights-from-a-mathematical-model
#11
David Reher, Barbara Klink, Andreas Deutsch, Anja Voss-Böhme
BACKGROUND: Cancer cell invasion, dissemination, and metastasis have been linked to an epithelial-mesenchymal transition (EMT) of individual tumour cells. During EMT, adhesion molecules like E-cadherin are downregulated and the decrease of cell-cell adhesion allows tumour cells to dissociate from the primary tumour mass. This complex process depends on intracellular cues that are subject to genetic and epigenetic variability, as well as extrinsic cues from the local environment resulting in a spatial heterogeneity in the adhesive phenotype of individual tumour cells...
August 11, 2017: Biology Direct
https://www.readbyqxmd.com/read/28794151/peripheral-inflammatory-markers-in-alzheimer-s-disease-a-systematic-review-and-meta-analysis-of-175-studies
#12
Ka Sing P Lai, Celina S Liu, Allison Rau, Krista L Lanctôt, Cristiano A Köhler, Maureen Pakosh, André F Carvalho, Nathan Herrmann
OBJECTIVES: Increasing evidence suggests that inflammation is involved in Alzheimer's disease (AD) pathology. This study quantitatively summarised the data on peripheral inflammatory markers in patients with AD compared with healthy controls (HC). METHODS: Original reports containing measurements of peripheral inflammatory markers in AD patients and HC were included for meta-analysis. Standardised mean differences were calculated using a random effects model. Meta-regression and exploration of heterogeneity was performed using publication year, age, gender, Mini-Mental State Examination (MMSE) scores, plasma versus serum measurements and immunoassay type...
August 9, 2017: Journal of Neurology, Neurosurgery, and Psychiatry
https://www.readbyqxmd.com/read/28791360/classical-vegf-notch-and-ang-signalling-in-cancer-angiogenesis-alternative-approaches-and-future-directions-review
#13
Nunzia Caporarello, Gabriella Lupo, Melania Olivieri, Martina Cristaldi, Maria Teresa Cambria, Mario Salmeri, Carmelina Daniela Anfuso
Angiogenesis is the formation of new vessels starting from pre-existing vasculature. Tumour environment is characterized by 'aberrant angiogenesis', whose main features are tortuous and permeable blood vessels, heterogeneous both in their structure and in efficiency of perfusion and very different from normal vessels. Therapeutic strategies targeting the three pathways chiefly involved in tumour angiogenesis, VEGF, Notch and Ang signalling, have been identified to block the vascular supply to the tumour. However, phenomena of toxicity, development of primary and secondary resistance and hypoxia significantly blunted the effects of anti-angiogenic drugs in several tumour types...
August 7, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28772285/the-inflammatory-potential-of-diet-and-ovarian-cancer-risk-results-from-two-prospective-cohort-studies
#14
Fred K Tabung, Tianyi Huang, Edward L Giovannucci, Stephanie A Smith-Warner, Shelley S Tworoger, Elizabeth M Poole
BACKGROUND: We used a food-based empirical dietary inflammatory pattern (EDIP) score to investigate whether diets with higher inflammatory potential are associated with increased ovarian cancer risk. METHODS: We followed 186 314 women in the Nurses' Health Study and Nurses' Health Study-II, from 1984 to 2013, to examine associations between EDIP scores and ovarian cancer risk, using Cox regression analyses. RESULTS: During 3 454 514 person-years of follow-up, 989 ovarian cancer cases were identified...
August 3, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28771772/altered-glutamine-metabolism-in-breast-cancer-subtype-dependencies-and-alternative-adaptations
#15
REVIEW
Rokaya El Ansari, Alan McIntyre, Madeleine L Craze, Ian O Ellis, Emad A Rakha, Andrew R Green
Cancer cells must alter their metabolism in order to satisfy the demands of necessary energy and cellular building blocks. These metabolic alterations are mediated by many oncogenic changes that affect cellular signalling pathways, which result in sustained cell growth and proliferation. Recently, metabolomics, has received great attention in the field of cancer research and as the essential metabolic pathways that drive tumour growth and progression are determined, the possibilities of new targets for therapeutic intervention are opened...
August 3, 2017: Histopathology
https://www.readbyqxmd.com/read/28771186/epithelial-to-mesenchymal-transition-and-micrornas-in-lung-cancer
#16
REVIEW
Antoine Legras, Nicolas Pécuchet, Sandrine Imbeaud, Karine Pallier, Audrey Didelot, Hélène Roussel, Laure Gibault, Elizabeth Fabre, Françoise Le Pimpec-Barthes, Pierre Laurent-Puig, Hélène Blons
Despite major advances, non-small cell lung cancer (NSCLC) remains the major cause of cancer-related death in developed countries. Metastasis and drug resistance are the main factors contributing to relapse and death. Epithelial-to-mesenchymal transition (EMT) is a complex molecular and cellular process involved in tissue remodelling that was extensively studied as an actor of tumour progression, metastasis and drug resistance in many cancer types and in lung cancers. Here we described with an emphasis on NSCLC how the changes in signalling pathways, transcription factors expression or microRNAs that occur in cancer promote EMT...
August 3, 2017: Cancers
https://www.readbyqxmd.com/read/28770635/natural-history-and-treatment-of-cutaneous-and-systemic-mastocytosis
#17
Michelle Le, Barbara Miedzybrodzki, Tim Olynych, Hugo Chapdelaine, Moshe Ben-Shoshan
INTRODUCTION: Mastocytosis, a heterogeneous group of disorders, is characterized by an abnormal increase in the number of mast cells that is limited to the skin (cutaneous mastocytosis), involving extracutaneous tissues (systemic mastocytosis), or presenting as solid tumours (mastocytoma and mast cell sarcoma). Recent studies estimate that 1 in 10,000 people are diagnosed with mastocytosis. Although prompt diagnosis and appropriate management are crucial, little is known about the natural history and currently there are no established management guidelines...
August 3, 2017: Postgraduate Medicine
https://www.readbyqxmd.com/read/28770105/multi-parametric-profiling-of-renal-cell-colorectal-and-ovarian-cancer-identifies-tumour-type-specific-stroma-phenotypes-and-a-novel-vascular-biomarker
#18
Sara Corvigno, Magnus Frödin, G Bea A Wisman, Hans W Nijman, Ate Gj Van der Zee, Karin Jirström, Björn Nodin, Ina Hrynchyk, David Edler, Peter Ragnhammar, Martin Johansson, Hanna Dahlstrand, Artur Mezheyeuski, Arne Östman
A novel set of integrated procedures for quantification of fibroblast-rich stroma and vascular characteristics has recently been presented allowing discovery of novel perivascular and stromal biomarkers in colorectal, renal cell, and ovarian cancer. In the present study, data obtained through these procedures from clinically well-annotated collections of these three tumour types have been used to address two novel questions. First, data have been used to investigate if the three tumour types demonstrate significant differences regarding features such as vessel diameter, vessel density, and perivascular marker expression...
July 2017: Journal of Pathology. Clinical Research
https://www.readbyqxmd.com/read/28770102/a-predictive-analysis-of-the-sp120-and-10d7g2-antibodies-for-human-equilibrative-nucleoside-transporter-1-hent1-in-pancreatic-ductal-adenocarcinoma-treated-with-adjuvant-gemcitabine
#19
Steve E Kalloger, Maziar Riazy, Basile Tessier-Cloutier, Joanna M Karasinska, Dongxia Gao, Renata D Peixoto, Setareh Samimi, Christine Chow, Hui-Li Wong, John R Mackey, Daniel J Renouf, David F Schaeffer
Expression of human equilibrative nucleoside transporter 1 (hENT1) in pancreatic ductal adenocarcinoma (PDAC) has been postulated to be a marker of sensitivity to gemcitabine. However, heterogeneity in the studies attempting to quantify hENT1 expression in patients with PDAC treated with gemcitabine has yielded inconclusive results that impede the adoption of hENT1 expression as a predictive biomarker. Tissue microarrays consisting of PDAC specimens from 227 patients acquired between 1987 and 2013 annotated with treatment and outcome information were subjected to staining with two antibodies for hENT1 (10D7G2 and SP120) on a single automated platform and scored by two independent pathologists blinded to treatment and outcome...
July 2017: Journal of Pathology. Clinical Research
https://www.readbyqxmd.com/read/28768365/importance-of-preoperative-diagnosis-for-management-of-patients-with-suspected-retroperitoneal-sarcoma
#20
REVIEW
David E Gyorki, Peter F M Choong, John Slavin, Michael A Henderson
Soft tissue sarcoma is an umbrella term which encompasses over 60 histological tumour types. Approximately 15% of soft tissue sarcomas arise in the retroperitoneum. This complex group of tumours poses unique management challenges due to their often large size, histological heterogeneity and complexity of anatomical relationships. This review discusses the management of retroperitoneal tumours including the need for preoperative diagnosis, the evidence for neoadjuvant radiotherapy, the role of multivisceral resection and the importance of a multidisciplinary team approach...
August 2, 2017: ANZ Journal of Surgery
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