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Cancer genomics

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https://www.readbyqxmd.com/read/29151279/detection-of-ctcs-in-cervical-cancer-using-a-conditionally-replicative-adenovirus-targeting-telomerase-positive-cells
#1
Masahiro Takakura, Takeo Matsumoto, Mitsuhiro Nakamura, Yasunari Mizumoto, Subaru Myojyo, Rena Yamazaki, Jyunpei Iwadare, Yukiko Bono, Shunsuke Orisaka, Takeshi Obata, Takashi Izuka, Kyosuke Kagami, Kentaro Nakayama, Hideki Hayakawa, Fuminori Sakurai, Hiroyuki Mizuguchi, Yasuo Urata, Toshiyoshi Fujiwara, Satoru Kyo, Toshiyuki Sasagawa, Hiroshi Fujiwara
Circulating tumor cells (CTCs) are newly discovered biomarkers of cancers. Although many systems detect CTCs, a gold standard has not yet been established. We analyzed CTCs in uterine cervical cancer patients using an advanced version of conditionally replicative adenovirus targeting telomerase-positive cells, which was enabled to infect coxsackievirus-adenovirus receptor-negative cells and to reduce false-positive signals in myeloid cells. Blood samples from cervical cancer patients were hemolyzed and infected with the virus and then labeled with fluorescent anti-CD45 and anti-pan cytokeratin antibodies...
November 19, 2017: Cancer Science
https://www.readbyqxmd.com/read/29151157/potent-apoptosis-inducing-activity-of-erypoegin-k-an-isoflavone-isolated-from-erythrina-poeppigiana-against-human-leukemia-hl-60-cells
#2
Kiyomi Hikita, Natsuki Hattori, Aya Takeda, Yuko Yamakage, Rina Shibata, Saori Yamada, Kuniki Kato, Tomiyasu Murata, Hitoshi Tanaka, Norio Kaneda
Erypoegin K is an isoflavone isolated from the stem bark of Erythrina poeppigiana. It contains a furan group at the A-ring of the core isoflavone structure and can inhibit the activity of glyoxalase I, an enzyme that catalyzes the detoxification of methylglyoxal (MG), a by-product of glycolysis. In the present study, we found that erypoegin K has a potent cytotoxic effect on human leukemia HL-60 cells. Its cytotoxic effect was much stronger than that of a known glyoxalase I inhibitor S-p-bromobenzylglutathione cyclopentyl diester...
November 18, 2017: Journal of Natural Medicines
https://www.readbyqxmd.com/read/29151113/cpne1-is-a-useful-prognostic-marker-and-is-associated-with-tnf-receptor-associated-factor-2-traf2-expression-in-prostate-cancer
#3
Jiabei Liang, Jian Zhang, Jun Ruan, Yuanyuan Mi, Qiang Hu, Zhirong Wang, Bingbing Wei
BACKGROUND CPNE1 plays a vital role in regulating cell differentiation. The clinical and biological values of CPNE1 in prostate cancer are still unclear. The aim of this study was to investigate the clinicopathological value of CPNE1 and the association of CPNE1 with TRAF2 expression in patients with prostate cancer. MATERIAL AND METHODS CPNE1 expression in prostate cancer was analyzed using Gene Expression Omnibus (GEO) databases. The Cancer Genome Atlas (TCGA) dataset was used to investigate the association of CPNE1 expression with TRAF2 expression in prostate cancer...
November 19, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29150601/decoding-critical-long-non-coding-rna-in-ovarian-cancer-epithelial-to-mesenchymal-transition
#4
Ramkrishna Mitra, Xi Chen, Evan J Greenawalt, Ujjwal Maulik, Wei Jiang, Zhongming Zhao, Christine M Eischen
Long non-coding RNA (lncRNA) are emerging as contributors to malignancies. Little is understood about the contribution of lncRNA to epithelial-to-mesenchymal transition (EMT), which correlates with metastasis. Ovarian cancer is usually diagnosed after metastasis. Here we report an integrated analysis of >700 ovarian cancer molecular profiles, including genomic data sets, from four patient cohorts identifying lncRNA DNM3OS, MEG3, and MIAT overexpression and their reproducible gene regulation in ovarian cancer EMT...
November 17, 2017: Nature Communications
https://www.readbyqxmd.com/read/29150481/identification-of-pleiotropic-cancer-susceptibility-variants-from-genome-wide-association-studies-reveals-functional-characteristics
#5
Yi-Hsuan Wu, Rebecca E Graff, Michael N Passarelli, Joshua D Hoffman, Elad Ziv, Thomas J Hoffmann, John S Witte
BACKGROUND: There exists compelling evidence that some genetic variants are associated with the risk of multiple cancer sites (i.e., pleiotropy). However, the biological mechanisms through which the pleiotropic variants operate are unclear. METHODS: We obtained all cancer risk associations from the National Human Genome Research Institute-European Bioinformatics Institute GWAS Catalog, and correlated cancer risk variants were clustered into groups. Pleiotropic variant groups and genes were functionally annotated...
November 17, 2017: Cancer Epidemiology, Biomarkers & Prevention
https://www.readbyqxmd.com/read/29150048/dna-dependent-protein-kinase-modulates-the-anti-cancer-properties-of-silver-nanoparticles-in-human-cancer-cells
#6
Hui Kheng Lim, Resham Lal Gurung, M Prakash Hande
Silver nanoparticles (Ag-np) were reported to be toxic to eukaryotic cells. These potentially detrimental effects of Ag-np can be advantageous in experimental therapeutics. They are currently being employed to enhance the therapeutic efficacy of cancer drugs. In this study, we demonstrate that Ag-np treatment trigger the activation of DNA-PKcs and JNK pathway at selected doses, presumably as a physiologic response to DNA damage and repair in normal and malignant cells. Ag-np altered the telomere dynamics by disrupting the shelterin complex located at the telomeres and telomere lengths...
December 2017: Mutation Research
https://www.readbyqxmd.com/read/29150005/crispr-libraries-and-screening
#7
John T Poirier
CRISPR-Cas9 technology has revolutionized large-scale functional genomic screening in mammalian cell-culture systems. Due in part to optimized lentiviral delivery vectors; it is now possible to perform CRISPR-Cas9 screens in animals in order to study biological processes in the context of a whole organism and within more physiologically relevant environment. This chapter focuses primarily on mouse models of human cancers; viral vectors used for simultaneous tumor initiation and genome editing and sgRNA library design considerations...
2017: Progress in Molecular Biology and Translational Science
https://www.readbyqxmd.com/read/29149895/novel-insights-into-chromosomal-conformations-in-cancer
#8
REVIEW
Ruobing Jia, Peiwei Chai, He Zhang, Xianqun Fan
Exploring gene function is critical for understanding the complexity of life. DNA sequences and the three-dimensional organization of chromatin (chromosomal interactions) are considered enigmatic factors underlying gene function, and interactions between two distant fragments can regulate transactivation activity via mediator proteins. Thus, a series of chromosome conformation capture techniques have been developed, including chromosome conformation capture (3C), circular chromosome conformation capture (4C), chromosome conformation capture carbon copy (5C), and high-resolution chromosome conformation capture (Hi-C)...
November 17, 2017: Molecular Cancer
https://www.readbyqxmd.com/read/29149612/cancer-evolution-no-room-for-negative-selection
#9
Samuel F Bakhoum, Dan A Landau
In this issue of Cell, Martincorena et al. and Campbell et al. interrogated the selection dynamics during tumor evolution using large-scale genomics datasets. They found that somatic mutations in cancer are largely neutral, highlighting a near-complete absence of negative selection. Neutral evolution enables tolerance of hypermutation, which defines a surprisingly large fraction of adult cancer.
November 16, 2017: Cell
https://www.readbyqxmd.com/read/29149611/core-clinical-data-elements-for-cancer-genomic-repositories-a-multi-stakeholder-consensus
#10
Robert B Conley, Dane Dickson, Jean Claude Zenklusen, Jennifer Al Naber, Donna A Messner, Ajlan Atasoy, Lena Chaihorsky, Deborah Collyar, Carolyn Compton, Martin Ferguson, Sean Khozin, Roger D Klein, Sri Kotte, Razelle Kurzrock, C Jimmy Lin, Frank Liu, Ingrid Marino, Robert McDonough, Amy McNeal, Vincent Miller, Richard L Schilsky, Lisa I Wang
The Center for Medical Technology Policy and the Molecular Evidence Development Consortium gathered a diverse group of more than 50 stakeholders to develop consensus on a core set of data elements and values essential to understanding the clinical utility of molecularly targeted therapies in oncology.
November 16, 2017: Cell
https://www.readbyqxmd.com/read/29149504/mybl1-rearrangements-and-myb-amplification-in-breast-adenoid-cystic-carcinomas-lacking-the-myb-nfib-fusion-gene
#11
Jisun Kim, Felipe C Geyer, Luciano G Martelotto, Charlotte K Y Ng, Raymond S Lim, Pier Selenica, Anqi Li, Fresia Pareja, Nicola Fusco, Marcia Edelweiss, Rahul Kumar, Rodrigo Gularte-Merida, Andre N Forbes, Ekta Khurana, Odette Mariani, Sunil Badve, Anne Vincent-Salomon, Larry Norton, Jorge S Reis-Filho, Britta Weigelt
Breast adenoid cystic carcinoma (AdCC), a rare type of triple-negative breast cancer (TNBC), has been shown to be driven by MYB pathway activation, most often underpinned by the MYB-NFIB fusion gene. Alternative genetic mechanisms, such as MYBL1 rearrangements, have been reported in MYB-NFIB-negative salivary gland AdCCs. Here we report on the molecular characterization by massively parallel sequencing of four breast AdCCs lacking the MYB-NFIB fusion gene. In two cases, we identified MYBL1 rearrangements (MYBL1-ACTN1 and MYBL1-NFIB), which were associated with MYBL1 overexpression...
November 17, 2017: Journal of Pathology
https://www.readbyqxmd.com/read/29149451/transcriptional-alterations-in-hereditary-and-sporadic-nonfunctioning-pancreatic-neuroendocrine-tumors-according-to-genotype
#12
Xavier M Keutgen, Suresh Kumar, Sudheer Gara, Myriem Boufraqech, Sunita Agarwal, Ralph H Hruban, Naris Nilubol, Martha Quezado, Richard Finney, Maggie Cam, Electron Kebebew
BACKGROUND: Nonfunctioning pancreatic neuroendocrine tumors (NFPanNETs) may be sporadic or inherited because of germline mutations associated with von Hippel-Lindau disease (VHL) or multiple endocrine neoplasia type 1 (MEN1). The clinical behavior of NFPanNETs is difficult to predict, even in tumors of the same stage and grade. The authors analyzed genotype-specific patterns of transcriptional messenger RNA (mRNA) levels of NFPanNETs to understand the molecular features that determine PanNET phenotype...
November 17, 2017: Cancer
https://www.readbyqxmd.com/read/29149410/tctp-in-neuronal-circuitry-assembly
#13
Cláudio Gouveia Roque, Christine E Holt
Although tctp expression in many areas of the human brain was reported more than 15 years ago, little was known about how it functions in neurons. The early notion that Tctp is primarily expressed in mitotic cells, together with reports suggesting a relative low abundance in the brain, has perhaps potentiated this almost complete disregard for the study of Tctp in the context of neuron biology. However, recent evidence has challenged this view, as a number of independent genome-wide profiling studies identified tctp mRNA among the most enriched in the axonal compartment across diverse neuronal populations, including embryonic retinal ganglion cells...
2017: Results and Problems in Cell Differentiation
https://www.readbyqxmd.com/read/29149408/function-of-translationally-controlled-tumor-protein-in-organ-growth-lessons-from-drosophila-studies
#14
Kwang-Wook Choi, Sung-Tae Hong, Thao Phuong Le
Regulation of cell growth and proliferation is crucial for development and function of organs in all animals. Genetic defects in growth control can lead to developmental disorders and cancers. Translationally controlled tumor protein (TCTP) is a family of evolutionarily conserved proteins implicated in cancer. Recent studies have revealed multiple roles of TCTP in diverse cellular events, but TCTP functions in vivo are poorly understood in vertebrate systems. We have used Drosophila melanogaster, the fruit fly, as a model organism for genetic dissection of Tctp function...
2017: Results and Problems in Cell Differentiation
https://www.readbyqxmd.com/read/29149299/twj-screen-an-isothermal-screening-assay-to-assess-ligand-dna-junction-interactions-in-vitro
#15
Ludivine Guyon, Marc Pirrotta, Katerina Duskova, Anton Granzhan, Marie-Paule Teulade-Fichou, David Monchaud
The quest for chemicals able to operate at selected genomic loci in a spatiotemporally controlled manner is desirable to create manageable DNA damages. Mounting evidence now shows that alternative DNA structures, including G-quadruplexes and branched DNA (or DNA junctions), might hamper proper progression of replication fork, thus triggering DNA damages and genomic instability. Therefore, small molecules that stabilize these DNA structures are currently scrutinized as a promising way to create genomic defects that cannot be dealt with properly by cancer cells...
November 15, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/29149131/genetics-and-genomics-an-oncology-nurse-s-journey-in-practice
#16
Suzanne M Mahon
BACKGROUND: Cancer genetics and genomics are now an integral component of oncology care. Genetics and genomics guide recommendations not only for cancer prevention and early detection, but also for cancer treatment. 
. OBJECTIVES: This article documents the personal experiences of an oncology nurse who has worked in cancer prevention and early detection since the 1990s and describes the many changes that have occurred in cancer-related genetic and genomic care during that time...
December 1, 2017: Clinical Journal of Oncology Nursing
https://www.readbyqxmd.com/read/29149121/ethics-and-genetics-examining-a-crossroads-in-nursing-through-a-case-study%C3%A2
#17
Laura Curr Curr Beamer
BACKGROUND: The field of genetics and genomics is rapidly expanding, particularly in oncology. Genetics and genomics can lead to ethical concerns. Oncology nurses must balance the need for evidence-based oncology care with that of ethical care for patients and their family members. OBJECTIVES: The purpose of this article is to provide an overview of cancer genetics and ethics and their impact on oncology nurses, patients, and families. METHODS: A case study of familial adenomatous polyposis (FAP) is offered to illustrate the impact of a hereditary cancer syndrome on several generations of a family and ethical issues surrounding cancer genetics...
December 1, 2017: Clinical Journal of Oncology Nursing
https://www.readbyqxmd.com/read/29147930/snp-association-study-in-pms2-associated-lynch-syndrome
#18
Sanne W Ten Broeke, Fadwa A Elsayed, Lisa Pagan, Maran J W Olderode-Berends, Encarna Gomez Garcia, Hans J P Gille, Liselot P van Hest, Tom G W Letteboer, Lizet E van der Kolk, Arjen R Mensenkamp, Theo A van Os, Liesbeth Spruijt, Bert J W Redeker, Manon Suerink, Yvonne J Vos, Anja Wagner, Juul T Wijnen, E W Steyerberg, Carli M J Tops, Tom van Wezel, Maartje Nielsen
Lynch syndrome (LS) patients are at high risk of developing colorectal cancer (CRC). Phenotypic variability might in part be explained by common susceptibility loci identified in Genome Wide Association Studies (GWAS). Previous studies focused mostly on MLH1, MSH2 and MSH6 carriers, with conflicting results. We aimed to determine the role of GWAS SNPs in PMS2 mutation carriers. A cohort study was performed in 507 PMS2 carriers (124 CRC cases), genotyped for 24 GWAS SNPs, including SNPs at 11q23.1 and 8q23.3...
November 17, 2017: Familial Cancer
https://www.readbyqxmd.com/read/29147648/molecular-crosstalking-among-noncoding-rnas-a-new-network-layer-of-genome-regulation-in-cancer
#19
REVIEW
Marco Ragusa, Cristina Barbagallo, Duilia Brex, Angela Caponnetto, Matilde Cirnigliaro, Rosalia Battaglia, Davide Barbagallo, Cinzia Di Pietro, Michele Purrello
Over the past few years, noncoding RNAs (ncRNAs) have been extensively studied because of the significant biological roles that they play in regulation of cellular mechanisms. ncRNAs are associated to higher eukaryotes complexity; accordingly, their dysfunction results in pathological phenotypes, including cancer. To date, most research efforts have been mainly focused on how ncRNAs could modulate the expression of protein-coding genes in pathological phenotypes. However, recent evidence has shown the existence of an unexpected interplay among ncRNAs that strongly influences cancer development and progression...
2017: International Journal of Genomics
https://www.readbyqxmd.com/read/29147625/a-transcriptomic-insight-into-the-impacts-of-mast-cells-in-lung-breast-and-colon-cancers
#20
Eun-A Ko, Kenton M Sanders, Tong Zhou
To date, the exact impact of mast cells in tumor microenvironment is still controversial because of inconsistency in observations regarding the relationship between mast cell infiltrates and cancer development and prognosis. The discrepancies in previous studies have motivated us to examine the roles of mast cells in cancer pathology from different perspectives. Here, we investigated the impact of mast cells on transcriptomic profiles in the tissue microenvironment. Mice carrying the W-sh mutation in c-kit (Kit(W-sh) ) are deficient in mast cell production and were used to assess the influence of mast cells on gene expression...
2017: Oncoimmunology
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