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Cancer system biology

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https://www.readbyqxmd.com/read/28647765/epidemiology-of-hepatocellular-carcinoma-target-population-for-surveillance-and-diagnosis
#1
REVIEW
An Tang, Oussama Hallouch, Victoria Chernyak, Aya Kamaya, Claude B Sirlin
Hepatocellular carcinoma (HCC) is the sixth most common cancer and the second leading cause of cancer mortality worldwide. Incidence rates of liver cancer vary widely between geographic regions and are highest in Eastern Asia and sub-Saharan Africa. In the United States, the incidence of HCC has increased since the 1980s. HCC detection at an early stage through surveillance and curative therapy has considerably improved the 5-year survival. Therefore, medical societies advocate systematic screening and surveillance of target populations at particularly high risk for developing HCC to facilitate early-stage detection...
June 24, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28647496/a-comprehensive-complex-systems-approach-to-the-study-and-analysis-of-mammalian-cell-cycle-control-system-in-the-presence-of-dna-damage-stress
#2
Ali Abroudi, Sandhya Samarasinghe, Don Kulasiri
Not many models of mammalian cell cycle system exist due to its complexity. Some models are too complex and hard to understand, while some others are too simple and not comprehensive enough. Moreover, some essential aspects, such as the response of G1-S and G2-M checkpoints to DNA damage as well as the growth factor signalling, have not been investigated from a systems point of view in current mammalian cell cycle models. To address these issues, we bring a holistic perspective to cell cycle by mathematically modelling it as a complex system consisting of important sub-systems that interact with each other...
June 21, 2017: Journal of Theoretical Biology
https://www.readbyqxmd.com/read/28646877/sbmlmod-a-python-based-web-application-and-web-service-for-efficient-data-integration-and-model-simulation
#3
Sascha Schäuble, Anne-Kristin Stavrum, Mathias Bockwoldt, Pål Puntervoll, Ines Heiland
BACKGROUND: Systems Biology Markup Language (SBML) is the standard model representation and description language in systems biology. Enriching and analysing systems biology models by integrating the multitude of available data, increases the predictive power of these models. This may be a daunting task, which commonly requires bioinformatic competence and scripting. RESULTS: We present SBMLmod, a Python-based web application and service, that automates integration of high throughput data into SBML models...
June 24, 2017: BMC Bioinformatics
https://www.readbyqxmd.com/read/28646258/selective-survival-advantage-associated-with-primary-tumor-resection-for-metastatic-gastric-cancer-in-a-western-population
#4
René Warschkow, Matthias Baechtold, Kenneth Leung, Bruno M Schmied, Daniel P Nussbaum, Beat Gloor, Dan G Blazer Iii, Mathias Worni
BACKGROUND: The prognosis of metastatic gastric cancer (GC) remains dismal, with a median survival of 10 months. Historically, primary tumor resection was not thought to confer any survival benefit. Although high-level data exist guiding treatment of metastatic GC for patients in the East, no such data exist for Western patients despite inherent ethnic differences in GC biology. METHODS: The 2006-2012 National Cancer Database was queried for adult patients with metastatic gastric adenocarcinoma...
June 23, 2017: Gastric Cancer
https://www.readbyqxmd.com/read/28644140/a-pathways-based-prediction-model-for-classifying-breast-cancer-subtypes
#5
Tong Wu, Yunfeng Wang, Ronghui Jiang, Xinliang Lu, Jiawei Tian
Breast cancer is highly heterogeneous and is classified into four subtypes characterized by specific biological traits, treatment responses, and clinical prognoses. We performed a systemic analysis of 698 breast cancer patient samples from The Cancer Genome Atlas project database. We identified 136 breast cancer genes differentially expressed among the four subtypes. Based on unsupervised clustering analysis, these 136 core genes efficiently categorized breast cancer patients into the appropriate subtypes. Functional enrichment based on Kyoto Encyclopedia of Genes and Genomes analysis identified six functional pathways regulated by these genes: JAK-STAT signaling, basal cell carcinoma, inflammatory mediator regulation of TRP channels, non-small cell lung cancer, glutamatergic synapse, and amyotrophic lateral sclerosis...
June 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/28643475/tailoring-of-physicochemical-properties-of-nanocarriers-for-effective-anti-cancer-applications
#6
REVIEW
Swaroop Chakraborty, Geethanjali S Dhakshinamurthy, Superb K Misra
Nanotechnology has emerged strongly as a viable option to overcome the challenge of early diagnosis and effective drug delivery, for cancer treatment. Emerging research articles have expounded the advantages of using a specific type of nanomaterial-based system called as "nanocarriers," for anti-cancer therapy. The nanocarrier system is used as a transport unit for targeted drug delivery of the therapeutic drug moiety. In order for the nanocarriers to be effective for anticancer therapy, their physicochemical parameter needs to be tuned so that bio-functionalisation can be achieved to a) allow drugs being attached to the substrate and for their controlled release, b) ensure the stability of the nanocarrier up to the point of delivery, and c) clearance of the nanocarrier after the delivery...
June 23, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28641556/pharmacogenetic-and-pharmacokinetic-dose-individualization-of-the-taxane-chemotherapeutic-drugs-paclitaxel-and-docetaxel
#7
Natália Bordin Andriguetti, Suziane Raymundo, Marina Venzon Antunes, Magda Susana Perasolo, Simone Gasparin Verza, Edna Sayuri Suyenaga, Rafael Linden
The taxane drugs paclitaxel and docetaxel, widely used on cancer chemotherapy, are currently dosed mainly based on body-surface area. This approach is associated with wide interindividual variability in drug exposure, leading to suboptimal dosing for many patients. We reviewed the available evidence supporting dose individualization strategies for paclitaxel and docetaxel, focusing mainly on the application of therapeutic drug monitoring by a priori pharmacogenetic data or a posteriori drug measurements in biological fluids...
June 22, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28641043/radiogenomics-of-high-grade-serous-ovarian-cancer-multireader-multi-institutional-study-from-the-cancer-genome-atlas-ovarian-cancer-imaging-research-group
#8
Hebert Alberto Vargas, Erich P Huang, Yulia Lakhman, Joseph E Ippolito, Priya Bhosale, Vincent Mellnick, Atul B Shinagare, Maria Anello, Justin Kirby, Brenda Fevrier-Sullivan, John Freymann, C Carl Jaffe, Evis Sala
Purpose To evaluate interradiologist agreement on assessments of computed tomography (CT) imaging features of high-grade serous ovarian cancer (HGSOC), to assess their associations with time-to-disease progression (TTP) and HGSOC transcriptomic profiles (Classification of Ovarian Cancer [CLOVAR]), and to develop an imaging-based risk score system to predict TTP and CLOVAR profiles. Materials and Methods This study was a multireader, multi-institutional, institutional review board-approved, HIPAA-compliant retrospective analysis of 92 patients with HGSOC (median age, 61 years) with abdominopelvic CT before primary cytoreductive surgery available through the Cancer Imaging Archive...
June 22, 2017: Radiology
https://www.readbyqxmd.com/read/28640972/understanding-adaptogenic-activity-specificity-of-the-pharmacological-action-of-adaptogens-and-other-phytochemicals
#9
REVIEW
Alexander Panossian
Adaptogens are stress-response modifiers that increase an organism's nonspecific resistance to stress by increasing its ability to adapt and survive. The classical reductionist model is insufficiently complex to explain the mechanistic aspects of the physiological notion of "adaptability" and the adaptogenic activity of adaptogens. Here, I demonstrate that (1) the mechanisms of action of adaptogens are impossible to rationally describe using the reductionist concept of pharmacology, whereas the network pharmacology approach is the most suitable method; and (2) the principles of systems biology and pharmacological networks appear to be more suitable for conceptualizing adaptogen function and are applicable to any phytochemical...
June 22, 2017: Annals of the New York Academy of Sciences
https://www.readbyqxmd.com/read/28640526/development-and-characterisation-of-a-99m-tc-tricarbonyl-labelled-estradiol-derivative-obtained-by-click-chemistry-with-potential-application-in-estrogen-receptors-imaging
#10
María Emilia Tejería, Javier Giglio, Silvia Dematteis, Ana Rey
Assessment of the presence of estrogen receptors in breast cancer is crucial for treatment planning. With the objective to develop a potential agent for estrogen receptors imaging we present the development and characterization of a (99m) Tc tricarbonyl labelled estradiol derivative. Using ethinylestradiol as starting material, a estradiol derivative bearing a 1,4-disubstituted 1,2,3-triazole-containing tridentate ligand system was synthesized by "Click Chemistry" and fully characterized. Labelling with high yield and radiochemical purity was achieved through the formation of a (99m) Tc-tricarbonyl complex...
June 22, 2017: Journal of Labelled Compounds & Radiopharmaceuticals
https://www.readbyqxmd.com/read/28640191/phenotypic-plasticity-and-cell-fate-decisions-in-cancer-insights-from-dynamical-systems-theory
#11
REVIEW
Dongya Jia, Mohit Kumar Jolly, Prakash Kulkarni, Herbert Levine
Waddington's epigenetic landscape, a famous metaphor in developmental biology, depicts how a stem cell progresses from an undifferentiated phenotype to a differentiated one. The concept of "landscape" in the context of dynamical systems theory represents a high-dimensional space, in which each cell phenotype is considered as an "attractor" that is determined by interactions between multiple molecular players, and is buffered against environmental fluctuations. In addition, biological noise is thought to play an important role during these cell-fate decisions and in fact controls transitions between different phenotypes...
June 22, 2017: Cancers
https://www.readbyqxmd.com/read/28639472/micrornas-as-a-tool-to-aid-stratification-of-colorectal-cancer-patients-and-to-guide-therapy
#12
Matthew Goblirsch, Georg Richtig, Ondrej Slaby, Ioana Berindan-Neagoe, Armin Gerger, Martin Pichler
Colorectal cancer is a common type of malignant disease with high rates of morbidity and mortality. Although treatment options have been expanded over the last years, the mainstay of curative treatment remains surgical removal of the tumor-bearing organ. Systemic treatment options include classic cytotoxic drugs as well as some biological agents. Noncoding RNAs are an evolving field in cancer diagnosis, prognosis and possible treatment. Noncoding miRNAs are small molecules with huge impact on gene expression...
June 22, 2017: Pharmacogenomics
https://www.readbyqxmd.com/read/28638789/multidisciplinary-approach-of-colorectal-cancer-liver-metastases
#13
REVIEW
Giammaria Fiorentini, Donatella Sarti, Camillo Aliberti, Riccardo Carandina, Andrea Mambrini, Stefano Guadagni
Large bowel cancer is a worldwide public health challenge. More than one third of patients present an advanced stage of disease at diagnosis and the liver is the most common site of metastases. Selection criteria for early diagnosis, chemotherapy and surgery have been recently expanded. The definition of resectability remains unclear. The presence of metastases is the most significant prognostic factor. For this reason the surgical resection of hepatic metastases is the leading treatment. The most appropriate resection approach remains to be defined...
June 10, 2017: World Journal of Clinical Oncology
https://www.readbyqxmd.com/read/28638048/maternal-folate-deficiency-causes-inhibition-of-mtor-signaling-down-regulation-of-placental-amino-acid-transporters-and-fetal-growth-restriction-in-mice
#14
Fredrick J Rosario, Peter W Nathanielsz, Theresa L Powell, Thomas Jansson
Maternal folate deficiency is linked to restricted fetal growth, however the underlying mechanisms remain to be established. Here we tested the hypothesis that mTOR functions as a folate sensor in vivo in mice and that maternal folate deficiency inhibits placental mTOR signaling and amino acid transporter activity and causes fetal growth restriction. Folate deficient mice had lower serum folate (-60%). In late pregnancy, fetal weight in the folate deficient group was decreased (-17%, p < 0.05), whereas placental weight, litter size and crown rump length were unaltered...
June 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28637507/dysregulated-expression-of-long-noncoding-rnas-in-gynecologic-cancers
#15
REVIEW
Elahe Seyed Hosseini, Matthieu Meryet-Figuiere, Hamed Sabzalipoor, Hamed Haddad Kashani, Hossein Nikzad, Zatollah Asemi
Cancers of the female reproductive system include ovarian, uterine, vaginal, cervical and vulvar cancers, which are termed gynecologic cancer. The emergence of long noncoding RNAs (lncRNAs), which are believed to play a crucial role in several different biological processes, has made the regulation of gene expression more complex. Although the function of lncRNAs is still rather elusive, their broad involvement in the initiation and progression of various cancers is clear. They are also involved in the pathogenesis of cancers of the female reproductive system...
June 21, 2017: Molecular Cancer
https://www.readbyqxmd.com/read/28636670/identification-of-novel-small-molecules-that-inhibit-stat3-dependent-transcription-and-function
#16
Iryna Kolosenko, Yasmin Yu, Sander Busker, Matheus Dyczynski, Jianping Liu, Martin Haraldsson, Caroline Palm Apergi, Thomas Helleday, Katja Pokrovskaja Tamm, Brent D G Page, Dan Grander
Activation of Signal Transducer and Activator of Transcription 3 (STAT3) has been linked to several processes that are critical for oncogenic transformation, cancer progression, cancer cell proliferation, survival, drug resistance and metastasis. Inhibition of STAT3 signaling has shown a striking ability to inhibit cancer cell growth and therefore, STAT3 has become a promising target for anti-cancer drug development. The aim of this study was to identify novel inhibitors of STAT-dependent gene transcription...
2017: PloS One
https://www.readbyqxmd.com/read/28636294/-selective-therapeutic-de-escalation-in-early-stage-breast-cancer
#17
Aikaterini Liapi, Apostolos Sarivalasis, Wendy Jeanneret Sozzi, Loïc Lelièvre, Khalil Zaman
The survival of patients with breast cancer has improved considerably thanks to adjuvant radiotherapy and systemic treatments. Due to the potential adverse events associated with these treatments, a de-escalation effort was undertaken concerning surgery and more recently the adjuvant treatments. Conservative breast surgery and the avoidance of axillary dissection were possible for the majority of the patients without detrimental effect on survival. New radiotherapy techniques and the consideration of cancer biology allowed to better protect the peripheral organs and even to avoid treatment in certain low-risk patients...
May 17, 2017: Revue Médicale Suisse
https://www.readbyqxmd.com/read/28635639/immune-checkpoints-as-a-target-for-colorectal-cancer-treatment
#18
REVIEW
Alessandro Passardi, Matteo Canale, Martina Valgiusti, Paola Ulivi
Anti-tumor immunity is a new line of research for the treatment of patients with solid tumors. In this field, negative regulators of the immune system called immune checkpoints play a key role in limiting antitumor immunologic responses. For this reason, immune checkpoint-inhibiting agents, such as those directed against cytotoxic T-lymphocyte antigen 4 (CTLA-4) and programmed death-1 receptor (PD1) and its ligand PD-L1, have been developed as antitumor drugs, producing interesting results in preclinical and clinical studies...
June 21, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28633205/advancing-the-science-of-myocardial-recovery-with-mechanical-circulatory-support-a-working-group-of-the-national-heart-lung-and-blood-institute
#19
EDITORIAL
Stavros G Drakos, Francis D Pagani, Martha S Lundberg, Timothy J Baldwin
The medical burden of heart failure (HF) has spurred interest in clinicians and scientists to develop therapies to restore the function of a failing heart. To advance this agenda, the National Heart, Lung, and Blood Institute (NHLBI) convened a Working Group of experts from June 2 to 3, 2016, in Bethesda, Maryland, to develop NHLBI recommendations aimed at advancing the science of cardiac recovery in the setting of mechanical circulatory support (MCS). MCS devices effectively reduce volume and pressure overload that drives the cycle of progressive myocardial dysfunction, thereby triggering structural and functional reverse remodeling...
July 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28632999/long-noncoding-rna-lnc-sox5-modulates-crc-tumorigenesis-by-unbalancing-tumor-microenvironment
#20
Wu Kaiming, Zhenxian Zhao, Kuanzhi Liu, Jian Zhang, Guanghua Li, Liang Wang
Long non-coding RNAs (LncRNAs) have been recently regarded as systemic regulators in multiple biological processes including tumorigenesis. In this study, we observed the expression of lncRNA lnc-sox5 was significantly increased in colorectal cancer (CRC). Despite the CRC cell growth, cell cycle and cell apoptosis was not affected by lnc-sox5 knock-down, lnc-sox5 knock-down suppressed CRC cell migration and invasion. In addition, xenograft animal model suggested that lnc-sox5 knock-down significantly suppressed the CRC tumorigenesis...
June 20, 2017: Cell Cycle
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