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Cancer evolution

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https://www.readbyqxmd.com/read/28730758/platinum-derivatives-a-multidisciplinary-approach
#1
Sinziana Gheorghe-Cetean, Calin Cainap, Luminita Oprean, Adriana Hangan, Piroska Virag, Eva Fischer-Fodor, Alexandra Gherman, Simona Cainap, Anne-Marie Constantin, Istvan Laszlo, Catalin Vlad, Radu Oprean
Cancer is one of the most difficult diseases to be treated. The particularities regarding the tumors' occurrence mechanism, their evolution under chemotherapy, disease-free interval, but also the increasing number of patients make cancer an intensively studied health domain. Although introduced in therapy since the early 80s, platinum derivatives play an essential role in anticancer therapy. Their use in therapy resulted in improving the patient quality of life and prolonging disease-free interval, which makes them still a benchmark for other anticancer compounds...
May 2017: Journal of B.U.ON.: Official Journal of the Balkan Union of Oncology
https://www.readbyqxmd.com/read/28730251/severe-upper-gastrointestinal-bleeding-determined-by-a-gastric-lymphoma-associated-with-helicobacter-pylori-positive-atrophic-gastritis
#2
Cosmin Vasile Obleagă, Cristin Constantin Vere, Ana Maria Pătraşcu, Emil Moraru, Antoanela Valentina Crafciuc, Maria Camelia Foarfă, Stelian ŞtefăniŢă Mogoantă, Costin Teodor Streba, Simona Bondari, Ştefan Paitici, Cecil Sorin Mirea, Ionică Daniel Vîlcea
The pathogenesis of gastric cancer regardless of histological structure is a classic example of gene-environment interaction, and an important epidemiological aspect was the recognized association with Helicobacter pylori infection. This paper describes a case of gastric mucosa-associated lymphoid tissue (MALT) lymphoma in a young patient whose first sign of the disease was upper gastrointestinal bleeding and associated hemorrhagic shock. The patient is a 31-year-old man, diagnosed by endoscopy 10 years ago with H...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/28729758/analysis-of-correlated-mutations-in-ras-g-domain
#3
Ekta Pathak
Ras GTPases are most prevalent proto-oncogenes in human cancer. Mutations in Ras remain untreatable more than three decades after the initial discovery. At the amino acid level, some residues under physical or functional constraints exhibit correlated mutations also known as coevolving/covariant residues. Revealing intra-molecular co-evolution between amino acid sites of proteins has become an emerging area of research as it enlightens the importance of variable regions. Here, I have identified and analyzed the coevolving residues in the Ras GTP binding domain (G-domain)...
2017: Bioinformation
https://www.readbyqxmd.com/read/28729483/epigenetic-plasticity-and-the-hallmarks-of-cancer
#4
REVIEW
William A Flavahan, Elizabeth Gaskell, Bradley E Bernstein
Chromatin and associated epigenetic mechanisms stabilize gene expression and cellular states while also facilitating appropriate responses to developmental or environmental cues. Genetic, environmental, or metabolic insults can induce overly restrictive or overly permissive epigenetic landscapes that contribute to pathogenesis of cancer and other diseases. Restrictive chromatin states may prevent appropriate induction of tumor suppressor programs or block differentiation. By contrast, permissive or "plastic" states may allow stochastic oncogene activation or nonphysiologic cell fate transitions...
July 21, 2017: Science
https://www.readbyqxmd.com/read/28729406/tumor-evolution-as-a-therapeutic-target
#5
REVIEW
Nabil Amirouchene-Angelozzi, Charles Swanton, Alberto Bardelli
Recent technological advances in the field of molecular diagnostics (including blood-based tumor genotyping) allow the measurement of clonal evolution in patients with cancer, thus adding a new dimension to precision medicine: time. The translation of this new knowledge into clinical benefit implies rethinking therapeutic strategies. In essence, it means considering as a target not only individual oncogenes but also the evolving nature of human tumors. Here, we analyze the limitations of targeted therapies and propose approaches for treatment within an evolutionary framework...
July 20, 2017: Cancer Discovery
https://www.readbyqxmd.com/read/28727736/persistent-damaged-bases-in-dna-allow-mutagenic-break-repair-in-escherichia-coli
#6
Jessica M Moore, Raul Correa, Susan M Rosenberg, P J Hastings
Bacteria, yeast and human cancer cells possess mechanisms of mutagenesis upregulated by stress responses. Stress-inducible mutagenesis potentially accelerates adaptation, and may provide important models for mutagenesis that drives cancers, host pathogen interactions, antibiotic resistance and possibly much of evolution generally. In Escherichia coli repair of double-strand breaks (DSBs) becomes mutagenic, using low-fidelity DNA polymerases under the control of the SOS DNA-damage response and RpoS general stress response, which upregulate and allow the action of error-prone DNA polymerases IV (DinB), II and V to make mutations during repair...
July 20, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28725577/standards-for-mri-reporting-the-evolution-to-pi-rads-v-2-0
#7
REVIEW
Michael Spektor, Mahan Mathur, Jeffrey C Weinreb
Prostate cancer (PCa) remains a leading cause of death in the United States, but the vast majority of men diagnosed with PCa will die from other causes. While historically the capability of assessing the risk of life-threatening versus indolent PCa has relied heavily on serum prostate-specific antigen (PSA) and transrectal ultrasound (TRUS), multiparametric magnetic resonance imaging (mpMRI) has emerged as the leading tool for detection and characterization of clinically significant PCa. However, wide variations and lack of standardization of mpMRI data acquisition, interpretation, and reporting have hampered its progress...
June 2017: Translational Andrology and Urology
https://www.readbyqxmd.com/read/28723516/the-molecular-evolution-of-castration-resistant-prostate-cancer
#8
REVIEW
Yvonne Ceder, Anders Bjartell, Zoran Culig, Mark A Rubin, Scott Tomlins, Tapio Visakorpi
CONTEXT: Androgen deprivation therapy (ADT) is the backbone of treatment for advanced prostate cancer. However, castration-resistant prostate cancer (CRPC) nearly invariably develops through a range of different molecular mechanisms accompanied by progression to a more aggressive phenotype. OBJECTIVE: To understand the key molecular mechanisms leading to CRPC and the functional implications of this progression. Understanding molecular evolutionary mechanisms in CRPC is essential for the development of novel curative therapeutic approaches...
December 2016: European Urology Focus
https://www.readbyqxmd.com/read/28723491/robotic-surgery-for-renal-cell-carcinoma-with-vena-caval-tumor-thrombus
#9
REVIEW
Ronney Abaza, Daniel D Eun, Michele Gallucci, Inderbir S Gill, Mani Menon, Alexandre Mottrie, Ahmad Shabsigh
CONTEXT: Robotic surgery has significantly advanced the minimally-invasive management of kidney tumors with extension into the inferior vena cava requiring caval cross-clamping and tumor thrombectomy. Additional techniques have recently been developed to continue the evolution of this complex procedure and extend its indications. OBJECTIVE: To review the current state of the art as regards robotic nephrectomy with inferior vena cava thrombectomy (RNIT). EVIDENCE ACQUISITION: A systematic review of the Medline database was performed...
December 15, 2016: European Urology Focus
https://www.readbyqxmd.com/read/28720900/low-frequency-ultrasound-induced-vegf-suppression-and-synergy-with-dendritic-cell-mediated-anti-tumor-immunity-in-murine-prostate-cancer-cells-in-vitro
#10
Wei Zhang, Wen-De Shou, Yan-Jun Xu, Wen-Kun Bai, Bing Hu
High tumor vascular endothelial growth factor (VEGF) levels are associated with poor treatment outcomes in prostate cancer (PCa), and immune deficiency in the PCa microenvironment, especially suppression of dendritic cell (DC) proliferation, has been confirmed. In this study, we (1) investigated whether VEGF participates in DC suppression in murine PCa cells (RM-1), (2) down-regulated VEGF expression using low-frequency ultrasound and microbubbles (UM), and (3) further explored any synergistic effect on immunological activation...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28720862/tracerx-renal-tracking-renal-cancer-evolution-through-therapy
#11
(no author information available yet)
No abstract text is available yet for this article.
July 18, 2017: Nature Reviews. Urology
https://www.readbyqxmd.com/read/28720448/the-feminization-of-hpv-how-science-politics-economics-and-gender-norms-shaped-u-s-hpv-vaccine-implementation
#12
Ellen M Daley, Cheryl A Vamos, Erika L Thompson, Gregory D Zimet, Zeev Rosberger, Laura Merrell, Nolan S Kline
Human papillomavirus (HPV) can cause a number of anogenital cancers (i.e., cervical, penile, anal, vaginal, vulvar) and genital warts. A decade ago, the HPV vaccine was approved, and has been shown to be a public health achievement that can reduce the morbidity and mortality for HPV-associated diseases. Yet, the mistaken over-identification of HPV as a female-specific disease has resulted in the feminization of HPV and HPV vaccines. In this critical review, we trace the evolution of the intersection of science, politics, economics and gender norms during the original HPV vaccine approval, marketing era, and implementation...
June 2017: Papillomavirus Research
https://www.readbyqxmd.com/read/28719907/tumor-heterogeneity-in-lymphomas-a-different-breed
#13
Christian M Schürch, Birgit Federmann, Leticia Quintanilla-Martinez, Falko Fend
The facts that cancer represents tissues consisting of heterogeneous neoplastic, as well as reactive, cell populations and that cancers of the same histotype may show profound differences in clinical behavior have long been recognized. With the advent of new technologies and the demands of precision medicine, the investigation of tumor heterogeneity has gained much interest. An understanding of intertumoral heterogeneity in patients with the same disease entity is necessary to optimally guide personalized treatment...
July 19, 2017: Pathobiology: Journal of Immunopathology, Molecular and Cellular Biology
https://www.readbyqxmd.com/read/28718696/tumor-induced-disorder-of-iron-metabolism-in-major-organs-a-new-insight-from-chemical-speciation-of-iron
#14
Rujie Chen, Guangcun Chen
Objective To investigate the evolution of iron speciation in major organs of tumor-bearing mice and its role in cancer formation and cancer-associated complications. Methods The concentration and chemical speciation of iron in the spleen, liver, lung, kidney, heart, blood, muscle, and tumor tissue of healthy mice and tumor-bearing mice were studied by synchrotron radiation-based total reflection X-ray fluorescence spectrometry (SR-TXRF) coupled with X-ray absorption spectroscopy (XAS). Results The TXRF and XAS results showed that the iron content, especially the ferritin content, significantly decreased in the blood and spleen but significantly increased in the liver, lung, and muscle of mice after tumor implantation...
January 1, 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/28718446/cancer-an-insurgency-of-clones
#15
David Gisselsson, Robert Egnell
Oncological therapy resembles a military force that eliminates the central power of a country (dominant clone of a cancer) to create a vacuum where insurgents (subclones) thrive and instigate rebellion (relapse). We suggest that military counterinsurgency doctrine can inspire a discussion of cancer that uniquely embraces both cancer cell evolution and tumour microenvironment.
February 2017: Trends in Cancer
https://www.readbyqxmd.com/read/28718445/mouse-versus-human-neutrophils-in-cancer-a-major-knowledge-gap
#16
REVIEW
Evgeniy B Eruslanov, Sunil Singhal, Steven M Albelda
Many types of cancer recruit neutrophils that could have protumor or antitumor effects on tumor development. Numerous findings in murine models suggest a predominantly protumoral role for neutrophils in cancer development. However, there are fundamental differences between mouse and human tumors in the evolution of tumors, genetic diversity, immune response, and also in the intrinsic biology of neutrophils that might have a profound impact on tumor development and the function of these cells. A crucial difference is that the majority of mouse tumor models lack the prolonged initial phases of multistage tumor evolution present in humans when antitumoral mechanisms are activated...
February 2017: Trends in Cancer
https://www.readbyqxmd.com/read/28718413/intrinsic-molecular-processes-impact-on-mutagenesis
#17
REVIEW
Byungho Lim, Jihyeob Mun, Seon-Young Kim
Mutations provide resources for genome evolution by generating genetic variability. In addition, mutations act as a driving force leading to disease pathogenesis, and thus have important implications for disease diagnosis, prognosis, and treatment. Understanding the mechanisms underlying how mutations occur is therefore of prime importance for elucidating evolutionary and pathogenic processes. Recent genomics studies have revealed that mutations occur non-randomly across the human genome. In particular, the distribution of mutations is highly associated with intrinsic molecular processes including transcription, chromatin organization, DNA replication timing, and DNA repair...
May 2017: Trends in Cancer
https://www.readbyqxmd.com/read/28717136/association-of-plasma-and-urinary-mutant-dna-with-clinical-outcomes-in-muscle-invasive-bladder-cancer
#18
K M Patel, K E van der Vos, C G Smith, F Mouliere, D Tsui, J Morris, D Chandrananda, F Marass, D van den Broek, D E Neal, V J Gnanapragasam, T Forshew, B W van Rhijn, C E Massie, N Rosenfeld, M S van der Heijden
Muscle Invasive Bladder Cancer (MIBC) has a poor prognosis. Whilst patients can achieve a 6% improvement in overall survival with Neo-Adjuvant Chemotherapy (NAC), many do not respond. Body fluid mutant DNA (mutDNA) may allow non-invasive identification of treatment failure. We collected 248 liquid biopsy samples including plasma, cell pellet (UCP) and supernatant (USN) from spun urine, from 17 patients undergoing NAC. We assessed single nucleotide variants and copy number alterations in mutDNA using Tagged-Amplicon- and shallow Whole Genome- Sequencing...
July 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28716116/catching-and-monitoring-clinical-innovation-through-performance-indicators-the-case-of-the-breast-conserving-surgery-indicator
#19
Anna Maria Murante, Silvio Candelori, Paola Rucci, Sabina Nuti, Manuela Roncella, Matteo Ghilli, Andrea Mercatelli, Maria Pia Fantini
BACKGROUND: The evolution in the surgical and diagnostic procedures, the attention to women's preferences, the case mix, and differences in professional practices may lead to a variability in the quality of breast cancer clinical pathway. To catch and manage this variability it is important to use valid measures. The aim of this paper is to examine the concurrent validity of the breast-conserving surgery (BCS) indicator and to provide evidence to guide the quality improvement process...
July 17, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28716043/evolution-in-the-surgical-management-of-gastric-cancer-is-extended-lymph-node-dissection-back-in-vogue-in-the-usa
#20
REVIEW
Tianxiang Chen, Dongsheng Yan, Zhiqiang Zheng, Jiayi Yang, Xiang Da Eric Dong
BACKGROUND: Gastric cancer remains a formidable treatment challenge. For decades, treatment consisted mostly of surgical intervention for this deadly disease. With improvements in the multi-disciplinary management of solid organ malignancies, the approach to this disease is being stepwise refined. MAIN BODY: One of the prevalent controversies in the surgical management of gastric cancer rests on the need for adequate harvesting of lymph nodes. For decades, lymph node dissection is regarded as a staging technique useful in only upstaging the disease...
July 17, 2017: World Journal of Surgical Oncology
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