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Molecular cell biology

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https://www.readbyqxmd.com/read/28107544/cutaneous-hpv8-and-mmupv1-e6-proteins-target-the-notch-and-tgf-%C3%AE-tumor-suppressors-to-inhibit-differentiation-and-sustain-keratinocyte-proliferation
#1
Jordan M Meyers, Aayushi Uberoi, Miranda Grace, Paul F Lambert, Karl Munger
Cutaneous beta-papillomaviruses are associated with non-melanoma skin cancers that arise in patients who suffer from a rare genetic disorder, Epidermodysplasia verruciformis (EV) or after immunosuppression following organ transplantation. Recent studies have shown that the E6 proteins of the cancer associated beta human papillomavirus (HPV) 5 and HPV8 inhibit NOTCH and TGF-β signaling. However, it is unclear whether disruption of these pathways may contribute to cutaneous HPV pathogenesis and carcinogenesis...
January 20, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28107482/a-circulating-microrna-signature-predicts-age-based-development-of-lymphoma
#2
Afshin Beheshti, Charles Vanderburg, J Tyson McDonald, Charusheila Ramkumar, Tatenda Kadungure, Hong Zhang, Ronald B Gartenhaus, Andrew M Evens
Extensive epidemiological data have demonstrated an exponential rise in the incidence of non-Hodgkin lymphoma (NHL) that is associated with increasing age. The molecular etiology of this remains largely unknown, which impacts the effectiveness of treatment for patients. We proposed that age-dependent circulating microRNA (miRNA) signatures in the host influence diffuse large B cell lymphoma (DLBCL) development. Our objective was to examine tumor development in an age-based DLBCL system using an inventive systems biology approach...
2017: PloS One
https://www.readbyqxmd.com/read/28106805/synthetic-assembly-of-mannose-moieties-using-polymer-chemistry-and-the-biological-evaluation-of-its-interaction-towards-concanavalin-a
#3
Deepti Diwan, Kohei Shinkai, Toshihiro Tetsuka, Bin Cao, Hidenao Arai, Tetsuo Koyama, Ken Hatano, Koji Matsuoka
Protein-carbohydrate interactions exhibit myriad intracellular recognition events, so understanding and investigating their specific interaction with high selectivity and strength are of crucial importance. In order to examine the effect of multivalent binding on the specificity of protein-carbohydrate interactions, we synthesized mannose glycosides as a novel type of glycosylated monomer and glycopolymers of polyacrylamide derivatives with α-mannose (α-Man) by radical polymerization and monitored their strength of interaction with concanavalin A (Con A) by surface plasmon resonance (SPR) detection...
January 18, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28106549/the-multimerization-state-of%C3%A2-the%C3%A2-amyloid-%C3%AE-42-amyloid-peptide-governs-its-interaction-network-with%C3%A2-the%C3%A2-extracellular-matrix
#4
Romain Salza, Claire Lethias, Sylvie Ricard-Blum
The goals of this work were i) to identify the interactions of amyloid-β (Aβ)42 under monomeric, oligomeric, and fibrillar forms with the extracellular matrix (ECM) and receptors, ii) to determine the influence of Aβ42 supramolecular organization on these interactions, and iii) to identify the molecular functions, biological processes, and pathways targeted by Aβ42 in the ECM. The ECM and cell surface partners of Aβ42 and its supramolecular forms were identified with protein and glycosaminoglycan (GAG) arrays (81 molecules in triplicate) probed by surface plasmon resonance imaging...
January 18, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28106223/next-generation-of-network-medicine-interdisciplinary-signaling-approaches
#5
REVIEW
Tamas Korcsmaros, Maria Victoria Schneider, Giulio Superti-Furga
In the last decade, network approaches have transformed our understanding of biological systems. Network analyses and visualizations have allowed us to identify essential molecules and modules in biological systems, and improved our understanding of how changes in cellular processes can lead to complex diseases, such as cancer, infectious and neurodegenerative diseases. "Network medicine" involves unbiased large-scale network-based analyses of diverse data describing interactions between genes, diseases, phenotypes, drug targets, drug transport, drug side-effects, disease trajectories and more...
January 20, 2017: Integrative Biology: Quantitative Biosciences From Nano to Macro
https://www.readbyqxmd.com/read/28105936/pathways-of-aging-comparative-analysis-of-gene-signatures-in-replicative-senescence-and-stress-induced-premature-senescence
#6
Kamil C Kural, Neetu Tandon, Mikhail Skoblov, Olga V Kel-Margoulis, Ancha V Baranova
BACKGROUND: In culturing normal diploid cells, senescence may either happen naturally, in the form of replicative senescence, or it may be a consequence of external challenges such as oxidative stress. Here we present a comparative analysis aimed at reconstruction of molecular cascades specific for replicative (RS) and stressinduced senescence (SIPS) in human fibroblasts. RESULTS: An involvement of caspase-3/keratin-18 pathway and serine/threonine kinase Aurora A/ MDM2 pathway was shared between RS and SIPS...
December 28, 2016: BMC Genomics
https://www.readbyqxmd.com/read/28105473/recent-applications-of-the-combination-of-mesoporous-silica-nanoparticles-with-nucleic-acids-development-of-bioresponsive-devices-carriers-and-sensors
#7
REVIEW
Rafael R Castillo, Alejandro Baeza, María Vallet-Regí
The discovery and control of the biological roles mediated by nucleic acids have turned them into a powerful tool for the development of advanced biotechnological materials. Such is the importance of these gene-keeping biomacromolecules that even nanomaterials have succumbed to the claimed benefits of DNA and RNA. Currently, there could be found in the literature a practically intractable number of examples reporting the use of combination of nanoparticles with nucleic acids, so boundaries are demanded. Following this premise, this review will only cover the most recent and powerful strategies developed to exploit the possibilities of nucleic acids as biotechnological materials when in combination with mesoporous silica nanoparticles...
January 20, 2017: Biomaterials Science
https://www.readbyqxmd.com/read/28105271/biological-evaluation-in-vitro-and-in-silico-of-azetidin-2-one-derivatives-as-potential-anticancer-agents
#8
Fabián E Olazaran, Gildardo Rivera, Alondra M Pérez-Vázquez, Cynthia M Morales-Reyes, Aldo Segura-Cabrera, Isaías Balderas-Rentería
Potential anticancer activity of 16 azetidin-2-one derivatives was evaluated showing that compound 6 [N-(p-methoxy-phenyl)-2-(p-methyl-phenyl)-3-phenoxy-azetidin-2-one] presented cytotoxic activity in SiHa cells and B16F10 cells. The caspase-3 assay in B16F10 cells displayed that azetidin-2-one derivatives induce apoptosis. Microarray and molecular analysis showed that compound 6 was involved on specific gene overexpression of cytoskeleton regulation and apoptosis due to the inhibition of some cell cycle genes...
January 12, 2017: ACS Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28105234/interaction-of-cyclophilin-a-with-a-novel-binding-protein-sr-25-and-characterization-of-their-expression-pattern-in-chinese-hepatocellular-carcinoma-patients
#9
Jian Chen, Ning Li, Peiwen Lian, Jiahui Wang, Peng Li, Zhaohua Gong, Lixin Jiang
Cyclophilin (Cyp) A has been reported to be overexpressed in the majority of cancer cells, including hepatocellular carcinoma (HCC). However, the biological functions of CypA in HCC are far from being understood. To determine the biological functions of CypA in HCC, the present study screened human fetal liver complementary DNA for proteins interacting with CypA using the yeast two-hybrid system. A nuclear protein, serine/arginine-rich (SR)-25, was isolated as a novel CypA-binding protein that is distinct from those previously described in the literature...
December 2016: Oncology Letters
https://www.readbyqxmd.com/read/28103614/enrichment-of-putative-pax8-target-genes-at-serous-epithelial-ovarian-cancer-susceptibility-loci
#10
Siddhartha P Kar, Emily Adler, Jonathan Tyrer, Dennis Hazelett, Hoda Anton-Culver, Elisa V Bandera, Matthias W Beckmann, Andrew Berchuck, Natalia Bogdanova, Louise Brinton, Ralf Butzow, Ian Campbell, Karen Carty, Jenny Chang-Claude, Linda S Cook, Daniel W Cramer, Julie M Cunningham, Agnieszka Dansonka-Mieszkowska, Jennifer Anne Doherty, Thilo Dörk, Matthias Dürst, Diana Eccles, Peter A Fasching, James Flanagan, Aleksandra Gentry-Maharaj, Rosalind Glasspool, Ellen L Goode, Marc T Goodman, Jacek Gronwald, Florian Heitz, Michelle A T Hildebrandt, Estrid Høgdall, Claus K Høgdall, David G Huntsman, Allan Jensen, Beth Y Karlan, Linda E Kelemen, Lambertus A Kiemeney, Susanne K Kjaer, Jolanta Kupryjanczyk, Diether Lambrechts, Douglas A Levine, Qiyuan Li, Jolanta Lissowska, Karen H Lu, Jan Lubiński, Leon F A G Massuger, Valerie McGuire, Iain McNeish, Usha Menon, Francesmary Modugno, Alvaro N Monteiro, Kirsten B Moysich, Roberta B Ness, Heli Nevanlinna, James Paul, Celeste L Pearce, Tanja Pejovic, Jennifer B Permuth, Catherine Phelan, Malcolm C Pike, Elizabeth M Poole, Susan J Ramus, Harvey A Risch, Mary Anne Rossing, Helga B Salvesen, Joellen M Schildkraut, Thomas A Sellers, Mark Sherman, Nadeem Siddiqui, Weiva Sieh, Honglin Song, Melissa Southey, Kathryn L Terry, Shelley S Tworoger, Christine Walsh, Nicolas Wentzensen, Alice S Whittemore, Anna H Wu, Hannah Yang, Wei Zheng, Argyrios Ziogas, Matthew L Freedman, Simon A Gayther, Paul D P Pharoah, Kate Lawrenson
BACKGROUND: Genome-wide association studies (GWAS) have identified 18 loci associated with serous ovarian cancer (SOC) susceptibility but the biological mechanisms driving these findings remain poorly characterised. Germline cancer risk loci may be enriched for target genes of transcription factors (TFs) critical to somatic tumorigenesis. METHODS: All 615 TF-target sets from the Molecular Signatures Database were evaluated using gene set enrichment analysis (GSEA) and three GWAS for SOC risk: discovery (2196 cases/4396 controls), replication (7035 cases/21 693 controls; independent from discovery), and combined (9627 cases/30 845 controls; including additional individuals)...
January 19, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28103441/enantio-specific-allosteric-modulation-of-cannabinoid-1-receptor
#11
Robert B Laprairie, Pushkar M Kulkarni, Jeffrey R Deschamps, Melanie E M Kelly, David R Janero, Maria G Cascio, Lesley A Stevenson, Roger G Pertwee, Terry Kenakin, Eileen M Denovan-Wright, Ganesh A Thakur
The cannabinoid 1 receptor (CB1R) is one of the most widely expressed metabotropic G protein-coupled receptors in brain, and its participation in various (patho)physiological processes has made CB1R activation a viable therapeutic modality. Adverse psychotropic effects limit the clinical utility of CB1R orthosteric agonists and have promoted the search for CB1R positive allosteric modulators (PAMs) with the promise of improved drug-like pharmacology and enhanced safety over typical CB1R agonists. In this study, we describe the synthesis and in vitro and ex vivo pharmacology of the novel allosteric CB1R modulator GAT211 (racemic) and its resolved enantiomers, GAT228 (R) and GAT229 (S)...
January 19, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/28103033/design-synthesis-and-biological-evaluation-of-small-high-affinity-siglec-7-ligands-toward-novel-inhibitors-of-cancer-immune-evasion
#12
Horst Prescher, Martin Frank, Stephan Gütgemann, Elena Kuhfeldt, Astrid Schweizer, Lars Nitschke, Carsten Watzl, Reinhard Brossmer
Natural killer cells are able to directly lyse tumor cells, thereby participating in the immune surveillance against cancer. Unfortunately, many cancer cells use immune evasion strategies to avoid their eradication by the immune system. A prominent escape strategy of malignant cells is to camouflage themselves with Siglec-7 ligands, thereby recruiting the inhibitory receptor Siglec-7 expressed on the NK cell surface which subsequently inhibits NK-cell-mediated lysis. Here we describe the synthesis and evaluation of the first, high-affinity low molecular weight Siglec-7 ligands to interfere with cancer cell immune evasion...
January 19, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28102232/aetiology-and-management-of-hereditary-aortopathy
#13
REVIEW
Aline Verstraeten, Ilse Luyckx, Bart Loeys
Aortic aneurysms are a major health problem because they account for 1-2% of all deaths in the Western population. Although abdominal aortic aneurysms (AAAs) are more prevalent than thoracic aortic aneurysms (TAAs), TAAs have been more exhaustively studied over the past 2 decades because they have a higher heritability and affect younger individuals. Gene identification in both syndromic and nonsyndromic TAA is proceeding at a rapid pace and has already pinpointed >20 genes associated with familial TAA risk...
January 19, 2017: Nature Reviews. Cardiology
https://www.readbyqxmd.com/read/28101740/improving-parameter-inference-from-frap-data-an-analysis-motivated-by-pattern-formation-in-the-drosophila-wing-disc
#14
Lin Lin, Hans G Othmer
Fluorescence recovery after photobleaching (FRAP) is used to obtain quantitative information about molecular diffusion and binding kinetics at both cell and tissue levels of organization. FRAP models have been proposed to estimate the diffusion coefficients and binding kinetic parameters of species for a variety of biological systems and experimental settings. However, it is not clear what the connection among the diverse parameter estimates from different models of the same system is, whether the assumptions made in the model are appropriate, and what the qualities of the estimates are...
January 18, 2017: Bulletin of Mathematical Biology
https://www.readbyqxmd.com/read/28101336/regulatory-elements-and-transcriptional-control-of-chicken-vasa-homologue-cvh-promoter-in-chicken-primordial-germ-cells
#15
So Dam Jin, Bo Ram Lee, Young Sun Hwang, Hong Jo Lee, Jong Seop Rim, Jae Yong Han
BACKGROUND: Primordial germ cells (PGCs), the precursors of functional gametes, have distinct characteristics and exhibit several unique molecular mechanisms to maintain pluripotency and germness in comparison to somatic cells. They express germ cell-specific RNA binding proteins (RBPs) by modulating tissue-specific cis- and trans-regulatory elements. Studies on gene structures of chicken vasa homologue (CVH), a chicken RNA binding protein, involved in temporal and spatial regulation are thus important not only for understanding the molecular mechanisms that regulate germ cell fate, but also for practical applications of primordial germ cells...
2017: Journal of Animal Science and Biotechnology
https://www.readbyqxmd.com/read/28101277/designing-an-audiocast-assignment-a-primary-literature-based-approach-that-promotes-student-learning-of-cell-and-molecular-biology-through-conversations-with-scientist-authors
#16
Sadek Shorbagi, Aarthi Ashok
No abstract text is available yet for this article.
December 2016: Journal of Microbiology & Biology Education: JMBE
https://www.readbyqxmd.com/read/28101253/2-chromon-3-yl-imidazole-derivatives-as-potential-antimicrobial-agents-synthesis-biological-evaluation-and-molecular-docking-studies
#17
Shweta Sharma, Vishal Sharma, Gurpreet Singh, Harpreet Kaur, Shubham Srivastava, Mohan Paul S Ishar
A series of novel 2-(chromon-3-yl)-4,5-diphenyl-1H-imidazoles (4a-h) were synthesized by one pot condensation of substituted 3-formylchromones (1a-h), benzil (2) and ammonium acetate (3) in refluxing acetic acid at 110 °C under N2 atmosphere. Allylation of compounds 4a-h with allyl bromide in the presence of fused K2CO3 furnished N-allyl-2-(chromon-3-yl)-4,5-diphenyl-1H-imidazoles (6a-h). The synthesized compounds were characterized spectroscopically and evaluated for in vitro antimicrobial activity against various pathogenic bacterial and fungal strains by disc diffusion method...
January 2017: Journal of Chemical Biology
https://www.readbyqxmd.com/read/28101231/the-biological-significance-of-methylome-differences-in-human-papilloma-virus-associated-head-and-neck-cancer
#18
Maria J Worsham, Kang Mei Chen, Indrani Datta, Josena K Stephen, Dhananjay Chitale, Alexandra Gothard, George Divine
In recent years, studies have suggested that promoter methylation in human papilloma virus (HPV) positive head and neck squamous cell carcinoma (HNSCC) has a mechanistic role and has the potential to improve patient survival. The present study aimed to replicate key molecular findings from previous analyses of the methylomes of HPV positive and HPV negative HNSCC in an independent cohort, to assess the reliability of differentially methylated markers in HPV-associated tumors. HPV was measured using real-time quantitative PCR and the biological significance of methylation differences was assessed by Ingenuity Pathway Analysis (IPA)...
December 2016: Oncology Letters
https://www.readbyqxmd.com/read/28100400/replication-study-bet-bromodomain-inhibition-as-a-therapeutic-strategy-to-target-c-myc
#19
Fraser Aird, Irawati Kandela, Christine Mantis
In 2015, as part of the Reproducibility Project: Cancer Biology, we published a Registered Report (Kandela et al., 2015) that described how we intended to replicate selected experiments from the paper "BET bromodomain inhibition as a therapeutic strategy to target c-Myc" (Delmore et al., 2011). Here we report the results of those experiments. We found that treatment of human multiple myeloma (MM) cells with the small-molecular inhibitor of BET bromodomains, (+)-JQ1, selectively downregulated MYC transcription, which is similar to what was reported in the original study (Figure 3B; Delmore et al...
January 19, 2017: ELife
https://www.readbyqxmd.com/read/28100166/smite-an-r-bioconductor-package-that-identifies-network-modules-by-integrating-genomic-and-epigenomic-information
#20
N Ari Wijetunga, Andrew D Johnston, Ryo Maekawa, Fabien Delahaye, Netha Ulahannan, Kami Kim, John M Greally
BACKGROUND: The molecular assays that test gene expression, transcriptional, and epigenetic regulation are increasingly diverse and numerous. The information generated by each type of assay individually gives an insight into the state of the cells tested. What should be possible is to add the information derived from separate, complementary assays to gain higher-confidence insights into cellular states. At present, the analysis of multi-dimensional, massive genome-wide data requires an initial pruning step to create manageable subsets of observations that are then used for integration, which decreases the sizes of the intersecting data sets and the potential for biological insights...
January 18, 2017: BMC Bioinformatics
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