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Tumour heterogeneity

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https://www.readbyqxmd.com/read/28324748/influenza-vaccination-in-adult-patients-with-solid-tumours-treated-with-chemotherapy
#1
REVIEW
Albert Vollaard, Imke Schreuder, Lizzy Slok-Raijmakers, Wim Opstelten, Guus Rimmelzwaan, Hans Gelderblom
Patients with solid tumours receiving chemotherapy are at risk for influenza complications. Yearly influenza vaccination is recommended to patients treated with chemotherapy. However, adherence to vaccination is low, most likely due to lack of data on efficacy, optimal timing and safety of vaccination. There is scarce evidence for the effectiveness of the influenza vaccine in adult patients with solid tumours and chemotherapy on reduction of pneumonia, decreased mortality and fewer interruptions of oncological treatment...
March 16, 2017: European Journal of Cancer
https://www.readbyqxmd.com/read/28324583/revisiting-cdk-inhibitors-for-treatment-of-glioblastoma-multiforme
#2
REVIEW
Dorota Lubanska, Lisa Porter
Despite extensive efforts and continual progress in research and medicine, outcomes for patients with high-grade glioma remain exceptionally poor. Over the past decade, research has revealed a great deal about the complex biology behind glioma development, and has brought to light some of the major barriers preventing successful treatment. Glioblastoma multiforme (GBM) (stage 4 astrocytoma) is a highly dynamic tumour and one of the most extreme examples of intratumoural heterogeneity, making targeting with specific therapeutics an inefficient and highly unpredictable goal...
March 21, 2017: Drugs in R&D
https://www.readbyqxmd.com/read/28315827/contemporary-management-of-low-grade-glioma-a-paradigm-shift-in-neuro-oncology
#3
REVIEW
Caroline Hayhurst
Supratentorial diffuse intrinsic low-grade gliomas represent a distinct but heterogenous group of tumours, with the propensity to grow and to differentiate into malignant tumours. They have been historically viewed in the 'benign' spectrum of intrinsic brain tumours, so a watch-and-wait policy was often adopted. With recent advances in our understanding of the natural history of these tumours, combined with advances in surgical technique, an aggressive approach is now recommended. Increasing quality evidence of the impact of tumour resection and multicentre trials of adjuvant radiotherapy and chemotherapy have led to a new algorithm for low-grade glioma management...
March 18, 2017: Practical Neurology
https://www.readbyqxmd.com/read/28315228/clinical-value-of-monoclonal-antibodies-and-tyrosine-kinase-inhibitors-in-the-treatment-of-head-and-neck-squamous-cell-carcinoma
#4
REVIEW
Wiktoria Blaszczak, Wojciech Barczak, Anna Wegner, Wojciech Golusinski, Wiktoria Maria Suchorska
Head and neck squamous cell carcinoma (HNSCC) is a heterogeneous group of malignant tumours that affects over 500,000 patients per year. Treatment failure is generally due to the heterogeneity of these tumours and to the serious adverse effects associated with treatment. Immunological system impairment, which is common in HNSCC, further contributes to treatment failure by mediating tumour escape mechanisms. To date, the only clinically approved targeted therapy agent is cetuximab, a monoclonal antibody (mAb) that binds to, and inhibits, epidermal growth factor receptor, which is widely overexpressed in HNSCC...
April 2017: Medical Oncology
https://www.readbyqxmd.com/read/28314739/intratumorous-heterogeneity-for-ras-mutations-in-a-treatment-na%C3%A3-ve-colorectal-tumour
#5
Sebastian Lunke, Belinda Lee, Sevastjan Kranz, Peter Gibbs, Paul Waring, Michael Christie
Activating mutations in KRAS and NRAS genes in patients with colorectal cancer (CRC) are associated with a lack of response to treatment with anti-epidermal growth factor receptor (EGFR) therapies. Mutations in these genes are thought to be mutually exclusive, however reports have described CRCs with two activating rat sarcoma (RAS) mutations. This has fuelled discussion about whether these mutations are the result of intratumorous heterogeneity, or if they are co-occurring in the same cancer cell clone. We present a case of a colorectal tumour with three RAS mutations detected during routine diagnostic testing...
March 17, 2017: Journal of Clinical Pathology
https://www.readbyqxmd.com/read/28304377/establishment-of-a-novel-cellular-model-for-myxofibrosarcoma-heterogeneity
#6
Birgit Lohberger, Nicole Stuendl, Andreas Leithner, Beate Rinner, Stefan Sauer, Karl Kashofer, Bernadette Liegl-Atzwanger
Human cancers frequently display substantial intra-tumoural heterogeneity in virtually all distinguishable phenotypic features, such as cellular morphology, gene expression, and metastatic potential. In order to investigate tumour heterogeneity in myxofibrosarcoma, we established a novel myxofibrosarcoma cell line with two well defined sub-clones named MUG-Myx2a and MUG-Myx2b. The parental tumour tissue and both MUG-Myx2 cell lines showed the same STR profile. The fact that MUG-Myx2a showed higher proliferation activity, faster migration and enhanced tumourigenicity was of particular interest...
March 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28302330/precision-surgery-for-colorectal-liver-metastases-opportunities-and-challenges-of-omics-based-decision-making
#7
REVIEW
R P Jones, K W Brudvik, J M Franklin, G J Poston
Precision surgery involves improving patient selection to ensure that surgical intervention that is proven to benefit on a population level is the optimal treatment for each individual patient. For patients with colorectal liver metastases (CRLM), existing prognostic scoring systems rely on well-recognised histopathological features such as size and number of lesions. Advances in preoperative imaging algorithms mean that increasingly low volume disease can be detected, improving assessment of these factors...
March 6, 2017: European Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28301871/a-unified-model-of-the-hierarchical-and-stochastic-theories-of-gastric-cancer
#8
REVIEW
Yanjing Song, Yao Wang, Chuan Tong, Hongqing Xi, Xudong Zhao, Yi Wang, Lin Chen
Gastric cancer (GC) is a life-threatening disease worldwide. Despite remarkable advances in treatments for GC, it is still fatal to many patients due to cancer progression, recurrence and metastasis. Regarding the development of novel therapeutic techniques, many studies have focused on the biological mechanisms that initiate tumours and cause treatment resistance. Tumours have traditionally been considered to result from somatic mutations, either via clonal evolution or through a stochastic model. However, emerging evidence has characterised tumours using a hierarchical organisational structure, with cancer stem cells (CSCs) at the apex...
March 16, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28299802/bmp-and-notch-interaction-in-crc-subtypes
#9
Shazia Irshad, Mukesh Bansal, Paolo Guarnieri, Hayley Davis, Ayman Al Haj Zen, Brygida Baran, Claudia Maria Assunta Pinna, Haseeb Rahman, Sujata Biswas, Chiara Bardella, Rosemary Jeffery, Lai Mun Wang, James Edward East, Annabelle Lewis, Ian Tomlinson, Simon John Leedham
The functional role of Bone Morphogenetic Protein (BMP) signalling in colorectal cancer (CRC) is poorly defined, with contradictory results in cancer cell line models reflecting the inherent difficulties of assessing a signalling pathway that is context dependent and subject to genetic constraints. By assessing the transcriptional response of a diploid human colonic epithelial cell line to BMP ligand stimulation we generated a prognostic BMP signalling signature, which was applied to multiple CRC datasets to investigate BMP heterogeneity across CRC molecular subtypes...
March 15, 2017: Journal of Pathology
https://www.readbyqxmd.com/read/28298374/safety-of-synthetic-and-biological-dmards-a-systematic-literature-review-informing-the-2016-update-of-the-eular-recommendations-for-management-of-rheumatoid-arthritis
#10
Sofia Ramiro, Alexandre Sepriano, Katerina Chatzidionysiou, Jackie L Nam, Josef S Smolen, Désirée van der Heijde, Maxime Dougados, Ronald van Vollenhoven, Johannes W Bijlsma, Gerd R Burmester, Marieke Scholte-Voshaar, Louise Falzon, Robert B M Landewé
OBJECTIVES: To assess the safety of synthetic (s) and biological (b) disease-modifying antirheumatic drugs (DMARDs) for the management of rheumatoid arthritis (RA) to inform the European League Against Rheumatism recommendations for the management of RA. METHODS: Systematic literature review (SLR) of observational studies comparing any DMARD with another intervention for the management of patients with RA. All safety outcomes were included. A comparator group was required for the study to be included...
March 15, 2017: Annals of the Rheumatic Diseases
https://www.readbyqxmd.com/read/28292937/disruption-of-tcf-%C3%AE-catenin-binding-impairs-wnt-signalling-and-induces-apoptosis-in-soft-tissue-sarcoma-cells
#11
Esther Martinez-Font, Irene Felipe-Abrio, Silvia Calabuig-Fariñas, Rafael F Ramos, Josefa Terrasa, Oliver Vögler, Regina Alemany, Javier Martín-Broto, Antònia Obrador-Hevia
Soft tissue sarcomas (STS) are malignant tumours of mesenchymal origin and represent around 1% of adult cancers, being a very heterogeneous group of tumours with more than 50 different subtypes. The Wnt signalling pathway is involved in the development and in the regulation, self-renewal and differentiation of mesenchymal stem cells and plays a role in sarcomagenesis. In this study we have tested pharmacological inhibition of Wnt signalling mediated by disruption of TCF/β-catenin binding and AXIN stabilization, being the first strategy more efficient in reducing cell viability and downstream effects...
March 14, 2017: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/28289945/a-novel-representation-of-inter-site-tumour-heterogeneity-from-pre-treatment-computed-tomography-textures-classifies-ovarian-cancers-by-clinical-outcome
#12
Hebert Alberto Vargas, Harini Veeraraghavan, Maura Micco, Stephanie Nougaret, Yulia Lakhman, Andreas A Meier, Ramon Sosa, Robert A Soslow, Douglas A Levine, Britta Weigelt, Carol Aghajanian, Hedvig Hricak, Joseph Deasy, Alexandra Snyder, Evis Sala
PURPOSE: To evaluate the associations between clinical outcomes and radiomics-derived inter-site spatial heterogeneity metrics across multiple metastatic lesions on CT in patients with high-grade serous ovarian cancer (HGSOC). METHODS: IRB-approved retrospective study of 38 HGSOC patients. All sites of suspected HGSOC involvement on preoperative CT were manually segmented. Gray-level correlation matrix-based textures were computed from each tumour site, and grouped into five clusters using a Gaussian Mixture Model...
March 13, 2017: European Radiology
https://www.readbyqxmd.com/read/28285707/intratumoural-heterogeneity-measured-using-fdg-pet-and-mri-is-associated-with-tumour-stroma-ratio-and-clinical-outcome-in-head-and-neck-squamous-cell-carcinoma
#13
J W Choi, D Lee, S H Hyun, M Han, J-H Kim, S J Lee
AIM: To evaluate the association between the tumour-stroma ratio and intratumoural heterogeneity measured using 2-[(18)F]-fluoro-2-deoxy-d-glucose (FDG) positron-emission tomography (PET) and magnetic resonance imaging (MRI), and further investigate the prognostic significance of imaging biomarkers in head and neck squamous cell carcinoma (HNSCC). MATERIALS AND METHODS: Textural-based imaging parameters of the primary tumour were extracted in 44 patients. In addition, the difference between the minimum and maximum apparent diffusion coefficient (ADC) values (ADCdiff) was calculated on MRI...
March 9, 2017: Clinical Radiology
https://www.readbyqxmd.com/read/28284966/the-impact-of-primary-treatment-strategy-on-vestibular-schwannoma-patient-quality-of-life
#14
Robert W Foley, Robert M Maweni, Hussein Jaafar, Rory McConn Walsh, Mohsen Javadpour, Daniel Rawluk
OBJECTIVE: To assess the quality of life (QoL) in a representative sample of vestibular schwannoma patients and to ascertain the differences in outcomes associated with distinct management strategies. PATIENTS & METHODS: Vestibular Schwannoma patients attending a tertiary referral centre were asked to complete the FACT-Br Questionnaire, which assesses QoL in five domains: physical, social, emotional and functional and a brain cancer specific domain. Results were analysed in the overall cohort and in surgery, stereotactic radiosurgery and conservative management subgroups...
March 8, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28277333/voice-outcomes-for-early-laryngeal-cancer
#15
Andrew J Kinshuck, Aditya Shenoy, Terry M Jones
PURPOSE OF REVIEW: Treatment options for early laryngeal cancer are well established with good local control and 5-year survival. The commonest treatments are radiotherapy or transoral laser microsurgery (TLM). There are advantages and disadvantages of the different modalities, but debate continues regarding the voice outcomes posttreatment. This review will focus on early glottic carcinoma and voice outcomes following the different treatments. RECENT FINDINGS: TLM and radiotherapy are both likely to affect voice quality, but the extent of voice change depends on different factors...
March 8, 2017: Current Opinion in Otolaryngology & Head and Neck Surgery
https://www.readbyqxmd.com/read/28276469/engineering-a-vascularised-3d-in-vitro-model-of-cancer-progression
#16
Tarig Magdeldin, Víctor López-Dávila, Judith Pape, Grant W W Cameron, Mark Emberton, Marilena Loizidou, Umber Cheema
The hallmark of tumours is the ability of cancerous cells to promote vascular growth, to disseminate and invade to distant organs. The metastatic process is heavily influenced by the extracellular matrix (ECM) density and composition of the surrounding tumour microenvironment. These microenvironmental cues, which include hypoxia, also regulate the angiogenic processes within a tumour, facilitating the spread of cancer cells. We engineered compartmentalized biomimetic colorectal tumouroids with stromal surrounds that comprised a range of ECM densities, composition and stromal cell populations...
March 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28276433/renal-cell-carcinoma
#17
REVIEW
James J Hsieh, Mark P Purdue, Sabina Signoretti, Charles Swanton, Laurence Albiges, Manuela Schmidinger, Daniel Y Heng, James Larkin, Vincenzo Ficarra
Renal cell carcinoma (RCC) denotes cancer originated from the renal epithelium and accounts for >90% of cancers in the kidney. The disease encompasses >10 histological and molecular subtypes, of which clear cell RCC (ccRCC) is most common and accounts for most cancer-related deaths. Although somatic VHL mutations have been described for some time, more-recent cancer genomic studies have identified mutations in epigenetic regulatory genes and demonstrated marked intra-tumour heterogeneity, which could have prognostic, predictive and therapeutic relevance...
March 9, 2017: Nature Reviews. Disease Primers
https://www.readbyqxmd.com/read/28276425/the-shc1-adaptor-simultaneously-balances-stat1-and-stat3-activity-to-promote-breast-cancer-immune-suppression
#18
Ryuhjin Ahn, Valérie Sabourin, Alicia M Bolt, Steven Hébert, Stephanie Totten, Nicolas De Jay, Maria Carolina Festa, Yoon Kow Young, Young Kyuen Im, Tony Pawson, Antonis E Koromilas, William J Muller, Koren K Mann, Claudia L Kleinman, Josie Ursini-Siegel
Tyrosine kinase signalling within cancer cells is central to the establishment of an immunosuppressive microenvironment. Although tyrosine kinase inhibitors act, in part, to augment adaptive immunity, the increased heterogeneity and functional redundancy of the tyrosine kinome is a hurdle to achieving durable responses to immunotherapies. We previously identified the Shc1 (ShcA) scaffold, a central regulator of tyrosine kinase signalling, as essential for promoting breast cancer immune suppression. Herein we show that the ShcA pathway simultaneously activates STAT3 immunosuppressive signals and impairs STAT1-driven immune surveillance in breast cancer cells...
March 9, 2017: Nature Communications
https://www.readbyqxmd.com/read/28274509/diagnostic-performance-of-conventional-mri-parameters-and-apparent-diffusion-coefficient-values-in-differentiating-between-benign-and-malignant-soft-tissue-tumours
#19
Y Song, Y C Yoon, Y Chong, S W Seo, Y-L Choi, I Sohn, M-J Kim
AIM: To compare the abilities of conventional magnetic resonance imaging (MRI) and apparent diffusion coefficient (ADC) in differentiating between benign and malignant soft-tissue tumours (STT). MATERIAL AND METHODS: A total of 123 patients with STT who underwent 3 T MRI, including diffusion-weighted imaging (DWI), were retrospectively analysed using variate conventional MRI parameters, ADCmean and ADCmin. RESULTS: For the all-STT group, the correlation between the malignant STT conventional MRI parameters, except deep compartment involvement, compared to those of benign STT were statistically significant with univariate analysis...
March 5, 2017: Clinical Radiology
https://www.readbyqxmd.com/read/28273972/role-of-cd10-immunoexpression-in-grading-phyllodes-tumour-of-the-breast
#20
Maithili Mandar Kulkarni, Siddhi Gaurish Sinai Khandeparkar, Avinash R Joshi, Vishakha Kothikar, Anuja Nasare, Sukhada Patil, Supriya Niraspatil, Bhagyashree Dhande
INTRODUCTION: Fibroepithelial tumours are a heterogeneous group of biphasic neoplasms consisting of a proliferation of both epithelial and stromal components. Fibroadenoma (FA) and Phyllodes Tumour (PT) constitute the major entities. It is crucial to distinguish benign from borderline PT (low grade malignant PT), because the former do not metastasize, have a lesser risk of local recurrence and initial local recurrences are histologically benign in almost all instances. Multiple Immunohistochemical (IHC) markers are being studied to find their utility in grading the PT accurately for planning proper treatment...
January 2017: Journal of Clinical and Diagnostic Research: JCDR
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