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https://www.readbyqxmd.com/read/28213677/a-new-distribution-range-of-ateles-chamek-humboldt-1812-in-an-ecotone-of-three-biomes-in-the-paraguay-river-basin
#1
Manoel Dos Santos-Filho, Christine Steiner São Bernardo, Henry Willian Van der Laan Barbosa, Almério Câmara Gusmão, Leandro Jerusalinsky, Gustavo Rodrigues Canale
Historical records of Ateles chamek (black-faced black spider monkey) suggest that the species range extends further south of the known species distribution, within an ecotonal region between the Amazonia, Cerrado and Pantanal biomes in Brazil. Ecotones are zones of habitat transition with high species richness that remain undersampled as conservationists often prioritize biodiversity hotspots. Thus, distribution ranges may be inaccurately measured when species occur in ecotonal zones. We report the first precise records of A...
February 17, 2017: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/28212986/correlating-the-effects-of-antimicrobial-preservatives-on-conformational-stability-aggregation-propensity-and-backbone-flexibility-of-an-igg1-monoclonal-antibody
#2
Jayant Arora, Sangeeta B Joshi, C Russell Middaugh, David D Weis, David B Volkin
Multi-dose formulations of biotherapeutics, which offer better dosage management and reduced production costs, require the addition of antimicrobial preservatives (APs). APs have been shown, however, to decrease protein stability in solution and cause protein aggregation. In this report, the effect of four APs, m-cresol, phenol, phenoxyethanol and benzyl alcohol, on conformational stability, aggregation propensity and backbone flexibility of an IgG1 monoclonal antibody, mAb-4, is investigated. Compared to no preservative control, each of the APs decreased the conformational stability of mAb-4 as measured by DSC and extrinsic fluorescence spectroscopy...
February 14, 2017: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28212554/afb1-hepatocarcinogenesis-is-via-lipid-peroxidation-that-inhibits-dna-repair-sensitizes-mutation-susceptibility-and-induces-aldehyde-dna-adducts-at-p53-mutational-hotspot-codon-249
#3
Mao-Wen Weng, Hyun-Wook Lee, Bongkun Choi, Hsiang-Tsui Wang, Yu Hu, Manju Mehta, Dhimant Desai, Shantu Amin, Yi Zheng, Moon-Shong Tang
Aflatoxin B1 (AFB1) contamination in the food chain is a major cause of hepatocellular carcinoma (HCC). More than 60% of AFB1 related HCC carry p53 codon 249 mutations but the causal mechanism remains unclear. We found that 1) AFB1 induces two types of DNA adducts in human hepatocytes, AFB1-8,9-epoxide-deoxyguanosine (AFB1-E-dG) induced by AFB1-E and cyclic α-methyl-γ-hydroxy-1,N2-propano-dG (meth-OH-PdG) induced by lipid peroxidation generated acetaldehyde (Acet) and crotonaldehyde (Cro); 2) the level of meth-OH-PdG is >30 fold higher than the level of AFB1-E-dG; 3) AFB1, Acet, and Cro, but not AFB1-E, preferentially induce DNA damage at codon 249; 4) methylation at -CpG- sites enhances meth-OH-PdG formation at codon 249; and 5) repair of meth-OH-PdG at codon 249 is poor...
February 14, 2017: Oncotarget
https://www.readbyqxmd.com/read/28212109/sustainable-exposure-prevention-through-innovative-detection-and-remediation-technologies-from-the-niehs-superfund-research-program
#4
Heather F Henry, William A Suk
Innovative devices and tools for exposure assessment and remediation play an integral role in preventing exposure to hazardous substances. New solutions for detecting and remediating organic, inorganic, and mixtures of contaminants can improve public health as a means of primary prevention. Using a public health prevention model, detection and remediation technologies contribute to primary prevention as tools to identify areas of high risk (e.g. contamination hotspots), to recognize hazards (bioassay tests), and to prevent exposure through contaminant cleanups...
February 17, 2017: Reviews on Environmental Health
https://www.readbyqxmd.com/read/28211931/the-dynamic-conductance-response-and-mechanics-modulated-memristive-behavior-of-the-azurin-monolayer-under-cyclic-loads
#5
Xiaoyue Zhang, Jian Shao, Yun Chen, Weijin Chen, Jing Yu, Biao Wang, Yue Zheng
Azurin (Az) has been considered as the research hotspot in molecular electronics, as well as a promising material for building functional devices on the molecular scale because of its special electrical properties and force-dependent conductance effects. Here we carry out an in-depth investigation combined with molecular scale experiments, molecular dynamics simulations, first-principles calculations and theoretical models to reveal the dynamic conductance response of the Az monolayer under cyclic mechanical loading...
February 17, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28211479/decoupling-absorption-and-emission-processes-in-super-resolution-localization-of-emitters-in-a-plasmonic-hotspot
#6
David L Mack, Emiliano Cortés, Vincenzo Giannini, Peter Török, Tyler Roschuk, Stefan A Maier
The absorption process of an emitter close to a plasmonic antenna is enhanced due to strong local electromagnetic (EM) fields. The emission, if resonant with the plasmonic system, re-radiates to the far-field by coupling with the antenna via plasmonic states, whose presence increases the local density of states. Far-field collection of the emission of single molecules close to plasmonic antennas, therefore, provides mixed information of both the local EM field strength and the local density of states. Moreover, super-resolution localizations from these emission-coupled events do not report the real position of the molecules...
February 17, 2017: Nature Communications
https://www.readbyqxmd.com/read/28211256/endemic-prevalence-of-hepatitis-b-and-c-in-mongolia-a-nationwide-survey-among-mongolian-adults
#7
Bekhbold Dashtseren, Andreas Bungert, Purevjargal Bat-Ulzii, Maralmaa Enkhbat, Oyungerel Lkhagva-Ochir, Ganbolor Jargalsaikhan, Anir Enkhbat, Odgerel Oidovsambuu, Jane Klemen, Naranbaatar Dashdorj, Naranjargal Dashdorj, Zulkhuu Genden, Dahgwahdorj Yagaanbuyant
In this study a representative group of Mongolian adults was tested for hepatitis B virus (HBV) and hepatitis C virus (HCV). Screening was conducted at 17 different locations on a randomly sampled group, representative of the Mongolian adult population. A total of 1158 adults, 500 (43.1%) men and 659 (56.9%) women were included. The prevalence estimates of HBV and HCV among the general Mongolian adult population were found to be 11.1%± 1% (SE) and 8.5% ± 0.7% or 207,418 and 160,228 cases, respectively. For HCV the majority of cases are concentrated in older age groups with a prevalence of 25...
February 17, 2017: Journal of Viral Hepatitis
https://www.readbyqxmd.com/read/28210997/3d-skeletal-uptake-of-18-f-sodium-fluoride-in-pet-ct-images-is-associated-with-overall-survival-in-patients-with-prostate-cancer
#8
Sarah Lindgren Belal, May Sadik, Reza Kaboteh, Nezar Hasani, Olof Enqvist, Linus Svärm, Fredrik Kahl, Jane Simonsen, Mads H Poulsen, Mattias Ohlsson, Poul F Høilund-Carlsen, Lars Edenbrandt, Elin Trägårdh
BACKGROUND: Sodium fluoride (NaF) positron emission tomography combined with computer tomography (PET/CT) has shown to be more sensitive than the whole-body bone scan in the detection of skeletal uptake due to metastases in prostate cancer. We aimed to calculate a 3D index for NaF PET/CT and investigate its correlation to the bone scan index (BSI) and overall survival (OS) in a group of patients with prostate cancer. METHODS: NaF PET/CT and bone scans were studied in 48 patients with prostate cancer...
December 2017: EJNMMI Research
https://www.readbyqxmd.com/read/28210621/circular-rnas-in-cardiovascular-disease-an-overview
#9
REVIEW
Ximin Fan, Xinyu Weng, Yifan Zhao, Wei Chen, Tianyi Gan, Dachun Xu
Circular RNA (circRNA), a novel type of endogenous noncoding RNA (ncRNA), has become a research hotspot in recent years. CircRNAs are abundant and stably exist in creatures, and they are found with covalently closed loop structures in which they are quite different from linear RNAs. Nowadays, an increasing number of scientists have demonstrated that circRNAs may have played an essential role in the regulation of gene expression, especially acting as miRNA sponges, and have described the potential mechanisms of several circRNAs in diseases, hinting at their clinical therapeutic values...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28208832/mitigating-multipath-bias-using-a-dual-polarization-antenna-theoretical-performance-algorithm-design-and-simulation
#10
Lin Xie, Xiaowei Cui, Sihao Zhao, Mingquan Lu
It is well known that multipath effect remains a dominant error source that affects the positioning accuracy of Global Navigation Satellite System (GNSS) receivers. Significant efforts have been made by researchers and receiver manufacturers to mitigate multipath error in the past decades. Recently, a multipath mitigation technique using dual-polarization antennas has become a research hotspot for it provides another degree of freedom to distinguish the line-of-sight (LOS) signal from the LOS and multipath composite signal without extensively increasing the complexity of the receiver...
February 13, 2017: Sensors
https://www.readbyqxmd.com/read/28207602/spreading-depolarization-monitoring-in-neurocritical-care-of-acute-brain-injury
#11
Jed A Hartings
PURPOSE OF REVIEW: Spreading depolarizations are unique in being discrete pathologic entities that are well characterized experimentally and also occur commonly in patients with substantial acute brain injury. Here, we review essential concepts in depolarization monitoring, highlighting its clinical significance, interpretation, and future potential. RECENT FINDINGS: Cortical lesion development in diverse animal models is mediated by tissue waves of mass spreading depolarization that cause the toxic loss of ion homeostasis and limit energy substrate supply through associated vasoconstriction...
February 14, 2017: Current Opinion in Critical Care
https://www.readbyqxmd.com/read/28206962/pi3k-pathway-mutations-are-associated-with-longer-time-to-local-progression-after-radioembolization-of-colorectal-liver-metastases
#12
Etay Ziv, Michael Bergen, Hooman Yarmohammadi, F Ed Boas, E Nadia Petre, Constantinos T Sofocleous, Rona Yaeger, David B Solit, Stephen B Solomon, Joseph P Erinjeri
PURPOSE: To establish the relationship between common mutations in the MAPK and PI3K signaling pathways and local progression after radioembolization. MATERIALS AND METHODS: Retrospective review of a HIPAA-compliant institutional review-board approved database identified 40 patients with chemo-refractory colorectal liver metastases treated with radioembolization who underwent tumor genotyping for hotspot mutations in 6 key genes in the MAPK/PI3K pathways (KRAS, NRAS, BRAF, MEK1, PIK3CA, and AKT1)...
February 11, 2017: Oncotarget
https://www.readbyqxmd.com/read/28205635/deciphering-the-distance-to-antibiotic-resistance-for-the-pneumococcus-using-genome-sequencing-data
#13
Fredrick M Mobegi, Amelieke J H Cremers, Marien I de Jonge, Stephen D Bentley, Sacha A F T van Hijum, Aldert Zomer
Advances in genome sequencing technologies and genome-wide association studies (GWAS) have provided unprecedented insights into the molecular basis of microbial phenotypes and enabled the identification of the underlying genetic variants in real populations. However, utilization of genome sequencing in clinical phenotyping of bacteria is challenging due to the lack of reliable and accurate approaches. Here, we report a method for predicting microbial resistance patterns using genome sequencing data. We analyzed whole genome sequences of 1,680 Streptococcus pneumoniae isolates from four independent populations using GWAS and identified probable hotspots of genetic variation which correlate with phenotypes of resistance to essential classes of antibiotics...
February 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28205625/%C3%AE-globin-gene-cluster-haplotypes-in-ethnic-minority-populations-of-southwest-china
#14
Hao Sun, Hongxian Liu, Kai Huang, Keqin Lin, Xiaoqin Huang, Jiayou Chu, Shaohui Ma, Zhaoqing Yang
The genetic diversity and relationships among ethnic minority populations of southwest China were investigated using seven polymorphic restriction enzyme sites in the β-globin gene cluster. The haplotypes of 1392 chromosomes from ten ethnic populations living in southwest China were determined. Linkage equilibrium and recombination hotspot were found between the 5' sites and 3' sites of the β-globin gene cluster. 5' haplotypes 2 (+---), 6 (-++-+), 9 (-++++) and 3' haplotype FW3 (-+) were the predominant haplotypes...
February 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28205334/long-non-coding-rna-tug1-promotes-migration-and-invasion-by-acting-as-a-cerna-of-mir-335-5p-in-osteosarcoma-cells
#15
Yong Wang, Tao Yang, Zhen Zhang, Ming Lu, Wei Zhao, Xiandong Zeng, Weiguo Zhang
Long non-coding RNAs (lncRNAs) have now become the new hotspots in an ocean of diseases including osteosarcoma. The function of taurine up-regulated gene 1 (TUG1) and its working mechanism in osteosarcoma remain unclear. In our research, we found that TUG1 was elevated and correlated with a poor prognosis in osteosarcoma patients. Also, the following functional experiment showed that decreased TUG1 could remarkably inhibit osteosarcoma cell migration and invasion, indicating that TUG1 functioned as an oncogene in osteosarcoma...
February 15, 2017: Cancer Science
https://www.readbyqxmd.com/read/28205150/the-potential-cost-effectiveness-of-different-dengue-vaccination-programmes-in-malaysia-a-value-based-pricing-assessment-using-dynamic-transmission-mathematical-modelling
#16
Asrul Akmal Shafie, Hui Yee Yeo, Laurent Coudeville, Lucas Steinberg, Balvinder Singh Gill, Rohani Jahis, Amar-Singh Hss
BACKGROUND: Dengue disease poses a great economic burden in Malaysia. METHODS: This study evaluated the cost effectiveness and impact of dengue vaccination in Malaysia from both provider and societal perspectives using a dynamic transmission mathematical model. The model incorporated sensitivity analyses, Malaysia-specific data, evidence from recent phase III studies and pooled efficacy and long-term safety data to refine the estimates from previous published studies...
February 15, 2017: PharmacoEconomics
https://www.readbyqxmd.com/read/28202424/gnao1-associated-epileptic-encephalopathy-and-movement-disorders-c-607g-a-variant-represents-a-probable-mutation-hotspot-with-a-distinct-phenotype
#17
Ravindra Arya, Christine Spaeth, Donald L Gilbert, James L Leach, Katherine D Holland
We describe a case of GNAO1-associated epilepsy and chorea in a patient with a de novo pathogenic mutation. This patient is unique in being the first reported male with this phenotype, and we propose that this genetic variant may represent a mutation hotspot that characterizes a unique phenotype. This 5.2-years-old boy presented with seizures, chorea, and severe global developmental delay. Brain imaging showed progressive diffuse cerebral atrophy. EEG monitoring revealed multifocal and diffuse discharges, along with generalized-onset seizures...
February 15, 2017: Epileptic Disorders: International Epilepsy Journal with Videotape
https://www.readbyqxmd.com/read/28201998/clinical-performance-evaluation-of-a-sensitive-rapid-low-throughput-test-for-kras-mutation-analysis-using-formalin-fixed-paraffin-embedded-tissue-samples
#18
Christine Weyn, Sofie Van Raemdonck, Robina Dendooven, Vincent Maes, Karen Zwaenepoel, Suzan Lambin, Patrick Pauwels
BACKGROUND: Testing for KRAS mutations in metastatic colorectal cancer (mCRC) on formalin-fixed, paraffin embedded (FFPE) tumor tissue has become standard of care. Different molecular methods exist to determine hotspot KRAS mutations in exon 2, 3 and 4, but testing is often limited by the sensitivity and the speed of analysis. The aim of this retrospective study was to establish the clinical performance of the Idylla™ KRAS Mutation Test on FFPE tumor samples of patients with mCRC. METHODS: KRAS mutation analysis was performed using the therascreen KRAS on the RotorGene Q platform (CE-IVD; Qiagen) and results were subsequently compared to the Idylla™ KRAS Mutation Test...
February 16, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28199989/presence-of-cancer-associated-mutations-in-exhaled-breath-condensates-of-healthy-individuals-by-next-generation-sequencing
#19
Omar Youssef, Aija Knuuttila, Päivi Piirilä, Tom Böhling, Virinder Sarhadi, Sakari Knuutila
Exhaled breath condensate (EBC) is a non-invasive source that can be used for studying different genetic alterations occurring in lung tissue. However, the low yield of DNA available from EBC has hampered the more detailed mutation analysis by conventional methods. We applied the more sensitive amplicon-based next generation sequencing (NGS) to identify cancer related mutations in DNA isolated from EBC. In order to apply any method for the purpose of mutation screening in cancer patients, it is important to clarify the incidence of these mutations in healthy individuals...
February 9, 2017: Oncotarget
https://www.readbyqxmd.com/read/28199841/lineage-specific-genes-are-prominent-dna-damage-hotspots-during-leukemic-transformation-of-b-cell-precursors
#20
Bryant Boulianne, Mark E Robinson, Philippa C May, Leandro Castellano, Kevin Blighe, Jennifer Thomas, Alistair Reid, Markus Müschen, Jane F Apperley, Justin Stebbing, Niklas Feldhahn
In human leukemia, lineage-specific genes represent predominant targets of deletion, with lymphoid-specific genes frequently affected in lymphoid leukemia and myeloid-specific genes in myeloid leukemia. To investigate the basis of lineage-specific alterations, we analyzed global DNA damage in primary B cell precursors expressing leukemia-inducing oncogenes by ChIP-seq. We identified more than 1,000 sensitive regions, of which B lineage-specific genes constitute the most prominent targets. Identified hotspots at B lineage genes relate to DNA-DSBs, affect genes that harbor genomic lesions in human leukemia, and associate with ectopic deletion in successfully transformed cells...
February 14, 2017: Cell Reports
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