keyword
MENU ▼
Read by QxMD icon Read
search

null

keyword
https://www.readbyqxmd.com/read/28430996/asymmetric-hybridization-in-cattails-typha-spp-and-its-implications-for-the-evolutionary-maintenance-of-native-typha-latifolia
#1
Sara J Pieper, Allison A Nicholls, Joanna R Freeland, Marcel E Dorken
Cattails (Typha spp.) have become an increasingly dominant component of wetlands in eastern North America and this dominance is largely attributable to the high frequency of Typha × glauca, the hybrid of native T. latifolia and putatively introduced T. angustifolia. Hybridization in this group is asymmetric, with T. angustifolia nearly always the maternal parent of F1 hybrids. However, the magnitude of hybrid infertility and whether mating asymmetries extend to the formation of advanced-generation hybrids have not been examined...
April 19, 2017: Journal of Heredity
https://www.readbyqxmd.com/read/28430644/red-and-processed-meat-consumption-and-gastric-cancer-risk-a-systematic-review-and-meta-analysis
#2
REVIEW
Zhanwei Zhao, Zifang Yin, Qingchuan Zhao
The associations between red and processed meat consumption and gastric cancer risk have remained inconclusive. We performed a systematic review and meta-analysis to analyze these associations. We searched PubMed and EMBASE to identify studies published from inception through October 2016. Subtype analyses of gastric cancer (gastric cardia adenocarcinoma and gastric non-cardiac adenocarcinoma) and dose-response analyses were performed. We finally selected 42 eligible studies. The summary relative risks of highest versus lowest consumption were positive for case-control studies with 1...
February 25, 2017: Oncotarget
https://www.readbyqxmd.com/read/28430511/anti-de-sitter-particles-and-manifest-super-isometries
#3
Alex S Arvanitakis, Alec E Barns-Graham, Paul K Townsend
Starting from the classical action for a spin-zero particle in a D-dimensional anti-de Sitter (AdS) spacetime, we recover the Breitenlohner-Freedman bound by quantization. For D=4, 5, 7 and using an Sl(2;K) spinor notation for K=R,C,H, we find a bitwistor form of the action for which the AdS isometry group is linearly realized, although only for zero mass when D=4, 7 in agreement with previous constructions. For zero mass and D=4 the conformal isometry group is linearly realized. We extend these results to the superparticle in the maximally supersymmetric "AdS×S" string or M-theory vacua, showing that quantization yields a 128+128 component supermultiplet...
April 7, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28430119/influence-of-wind-speed-on-rgb-d-images-in-tree-plantations
#4
Dionisio Andújar, José Dorado, José María Bengochea-Guevara, Jesús Conesa-Muñoz, César Fernández-Quintanilla, Ángela Ribeiro
Weather conditions can affect sensors' readings when sampling outdoors. Although sensors are usually set up covering a wide range of conditions, their operational range must be established. In recent years, depth cameras have been shown as a promising tool for plant phenotyping and other related uses. However, the use of these devices is still challenged by prevailing field conditions. Although the influence of lighting conditions on the performance of these cameras has already been established, the effect of wind is still unknown...
April 21, 2017: Sensors
https://www.readbyqxmd.com/read/28428350/targeted-inactivation-of-copper-transporter-atp7b-in-hepatocytes-causes-liver-steatosis-and-obesity-in-mice
#5
Abigael Muchenditsi, Haojun Yang, James P Hamilton, Lahari Koganti, Franck Housseau, Lisa Aronov, Hongni Fan, Hannah Pierson, Ashima Bhattacharjee, Robert C Murphy, Cynthia L Sears, James J Potter, Clavia Ruth Wooton-Kee, Svetlana Lutsenko
The copper transporter ATP7B is essential for mammalian copper homeostasis. Mutations in ATP7B result in copper accumulation, especially in the liver, and cause Wilson disease (WD). The major role of hepatocytes in WD pathology is firmly established. It is less certain whether the excess Cu in hepatocytes is solely responsible for development of WD. To address this issue, we generated a mouse strain for Cre-mediated deletion of Atp7b and inactivated Atp7b selectively in hepatocytes. Atp7bΔ(Hep) mice accumulate copper in the liver, have elevated urinary copper, lack holo-ceruloplasmin, but show no liver disease for up to 30 weeks...
April 20, 2017: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/28428226/rapid-throughput-analysis-of-gabaa-receptor-subtype-modulators-and-blockers-using-disbac1-3-membrane-potential-red-dye
#6
Atefeh Mousavi Nik, Brandon Pressly, Vikrant Singh, Shane Antrobus, Susan Hulsizer, Michael A Rogawski, Heike Wulff, Isaac N Pessah
Fluorometric Imaging Plate Reader (FLIPR®) membrane potential dye (FMP-Red-Dye) is a proprietary tool for basic discovery and high throughput drug screening for G-protein coupled receptors and ion channels. We optimized and validated this potentiometric probe to assay functional modulators of heterologous expressed GABAA receptor (GABAAR) isoforms (synaptic α1β3γ2, extrasynaptic α4β3δ, and β3 homopentomers). High-resolution mass spectrometry identified FMP-Red-dye as DisSBAC1(3). GABAAR expressing cells equilibrated with FMP-Red-Dye exhibited depolarized equilibrium membrane (Em) potentials compared to GABAAR-null cells...
April 20, 2017: Molecular Pharmacology
https://www.readbyqxmd.com/read/28428138/pregnane-x-receptor-regulates-the-ahr-cyp1a1-pathway-and-protects-liver-cells-from-benzo-%C3%AE-pyrene-induced-dna-damage
#7
Hongmei Cui, Xinsheng Gu, Jingshu Chen, Ying Xie, Sui Ke, Jing Wu, Andrei Golovko, Benjamin Morpurgo, Chunhong Yan, Timothy D Phillips, Wen Xie, Jianyuan Luo, Zhijun Zhou, Yanan Tian
Pregnane X receptor (PXR) plays an important role in protecting cells from mutagenic DNA damages induced by endogenous and exogenous toxicants. This protective function is often attributed to the PXR-regulated metabolic detoxification. Here we report a novel potential mechanism that PXR reduces benzo-[α]-pyrene(BaP)-induced DNA damage through inhibiting the transcriptional activity of aryl hydrocarbon receptor (AhR) which plays a pivotal role in the bioactivation of BaP. We have utilized three well-characterized cell lines, i...
April 17, 2017: Toxicology Letters
https://www.readbyqxmd.com/read/28427236/combined-effects-of-glutathione-s-transferase-m1-and-t1-polymorphisms-on-risk-of-lung-cancer-evidence-from-a-meta-analysis
#8
Ying Gao, Fei Gao, Ting-Ting Hu, Gang Li, Yan-Xia Sui
Many studies have reported an association between the glutathione S-transferase M1 null and T1 null polymorphisms and lung cancer risk. However, the combined effects of GSTM1 null and GSTT1 null polymorphisms have not been reported previously. We, therefore, performed a meta-analysis to investigate the combined effects. 40 publications with 44 case-control studies were selected in the meta-analysis, including 13,706 cases and 13,093 controls. Significant association was observed between the combined effects of GSTM1 and GSTT1 polymorphisms and lung cancer risk when all the eligible studies were pooled into the meta-analysis...
March 6, 2017: Oncotarget
https://www.readbyqxmd.com/read/28427210/dependence-of-p53-deficient-cells-on-the-dhx9-dexh-box-helicase
#9
Teresa Lee, Jerry Pelletier
DHX9 is a DExH-box helicase family member with key regulatory roles in a broad range of cellular processes. It participates at multiple levels of gene regulation, including DNA replication, transcription, translation, RNA transport, and microRNA processing. It has been implicated in tumorigenesis and recent evidence suggests that it may be a promising chemotherapeutic target. Previous studies have determined that DHX9 suppression elicits an apoptotic or senescence response by activating p53 signaling. Here, we show that DHX9 inhibition can also have deleterious effects in cells lacking functional p53...
March 3, 2017: Oncotarget
https://www.readbyqxmd.com/read/28426947/structural-neuroplasticity-of-the-superior-temporal-plane-in-early-and-late-blindness
#10
Hicret Atilgan, Olivier Collignon, Uri Hasson
Blindness is associated with well-documented changes to the morphometry and function of the occipital cortex. By comparison, its impact on the perisylvian regions in the superior temporal plane (STP) is poorly understood, with many studies reporting null findings on this issue. Here we re-approach this question using a morphometric analysis that relied on fine-scale, manual annotation of 13 sub-regions within the STP and that quantified both univariate and multivariate differences in morphometry. We applied these analyses to both cortical thickness (CT) and surface area (SA) data from congenitally and late blind, as compared to two matched sighted control groups...
April 17, 2017: Brain and Language
https://www.readbyqxmd.com/read/28426525/gstm1-and-gstt1-genes-are-associated-with-dna-damage-of-p53-gene-in-coke-oven-workers
#11
Yuefeng He, Jun Qi, Fang He, Yongchang Zhang, Youlian Wang, Ruobing Zhang, Gang Li
OBJECTIVES: This study investigated whether variations in GSTT1 and GSTM1 gene are associated with the DNA damage level of p53 gene. METHODS: We quantified urinary 1-hydroxypyrene using high-performance liquid chromatography, and examined the DNA damage level of p53 gene by real-time quantitative PCR in 756 coke-oven workers. Multiplex PCR was used to detect the presence or absence of genes. RESULTS: DNA damage levels of p53 gene in the high exposure group and intermediate exposure group were significantly higher than that of p53 gene in the low exposure group (P < 0...
April 19, 2017: Journal of Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/28425443/hybridization-of-strength-pareto-multiobjective-optimization-with-modified-cuckoo-search-algorithm-for-rectangular-array
#12
Khairul Najmy Abdul Rani, Mohamedfareq Abdulmalek, Hasliza A Rahim, Neoh Siew Chin, Alawiyah Abd Wahab
This research proposes the various versions of modified cuckoo search (MCS) metaheuristic algorithm deploying the strength Pareto evolutionary algorithm (SPEA) multiobjective (MO) optimization technique in rectangular array geometry synthesis. Precisely, the MCS algorithm is proposed by incorporating the Roulette wheel selection operator to choose the initial host nests (individuals) that give better results, adaptive inertia weight to control the positions exploration of the potential best host nests (solutions), and dynamic discovery rate to manage the fraction probability of finding the best host nests in 3-dimensional search space...
April 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28424158/generation-of-a-multipurpose-prdm16-allele-by-targeted-trapping
#13
A Strassman, F Schnütgen, Q Dai, J C Jones, A C Gomez, L Pitstick, N E Holton, R Moskal, E R Leslie, H von Melchner, D R Beier, B C Bjork
Gene trap mutagenesis is a powerful tool to create loss-of-function mutations in mice and other model organisms. Modifications of traditional gene trap cassettes, including addition of conditional features in the form of Flip-excision (FlEx) arrays enabling directional gene trap cassette inversions by Cre and Flpe site-specific recombinases, greatly enhanced their experimental potential. By taking advantage of these conditional gene trap cassettes, we developed a generic strategy for generating conditional mutations and validated this strategy in mice carrying a multipurpose allele of the Prdm16 transcription factor gene...
April 19, 2017: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/28423663/a-novel-total-pituitary-hormone-index-as-an-indicator-of-postoperative-pituitary-function-in-patients-undergoing-resection-of-pituitary-adenomas
#14
Shousen Wang, Biao Li, Chenyu Ding, Deyong Xiao, Liangfeng Wei
The purpose of this study was to investigate the differences between pre- and postoperative pituitary hormone levels in patients undergoing surgical resection of pituitary adenoma and to identify factors associated with preoperative hypopituitarism.Data from 81 patients with histologically confirmed functioning and non-functioning pituitary adenomas (NFPA) who underwent transsphenoidal resection from January 2011 to December 2013 were retrospectively analyzed. Logistic regression was applied to analyze factors associated with preoperative hypopituitarism...
March 7, 2017: Oncotarget
https://www.readbyqxmd.com/read/28423513/mir-503-5p-confers-drug-resistance-by-targeting-puma-in-colorectal-carcinoma
#15
Ke Xu, Guo Chen, Yanyan Qiu, Zeting Yuan, Hongchang Li, Xia Yuan, Jian Sun, Jianhua Xu, Xin Liang, Peihao Yin
The development of multidrug-resistance (MDR) is a major contributor to death in colorectal carcinoma (CRC). Here, we investigated the possible role of microRNA (miR)-503-5p in drug resistant CRC cells. Unbiased microRNA array screening revealed that miR-503-5p is up-regulated in two oxaliplatin (OXA)-resistant CRC cell lines. Overexpression of miR-503-5p conferred resistance to OXA-induced apoptosis and inhibition of tumor growth in vitro and in vivo through down-regulation of PUMA expression. miR-503-5p knockdown sensitized chemoresistant CRC cells to OXA...
March 28, 2017: Oncotarget
https://www.readbyqxmd.com/read/28422127/differential-control-of-asexual-development-and-sterigmatocystin-biosynthesis-by-a-novel-regulator-in-aspergillus-nidulans
#16
Yong Jin Kim, Yu Yeong Man, Pil Jae Maeng
The filamentous fungus Aspergillus nidulans primarily reproduces by forming asexual spores called conidia and produces the mycotoxin sterigmatocystin (ST), the penultimate precursor of aflatoxins. It has been known that asexual development and ST production are tightly co-regulated by various regulatory inputs. Here, we report that the novel regulator AslA with a C2H2 domain oppositely regulates development and ST biosynthesis. Nullifying aslA resulted in defective conidiation and reduced expression of brlA encoding a key activator of asexual development, which indicates that AslA functions as an upstream activator of brlA expression...
April 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28421633/efficacy-of-tulathromycin-for-the-treatment-of-foals-with-mild-to-moderate-bronchopneumonia
#17
D Rutenberg, M Venner, S Giguère
BACKGROUND: There is conflicting data regarding the efficacy of tulathromycin for the treatment of foals with bronchopneumonia. HYPOTHESES: Tulathromycin is effective for the treatment of bronchopneumonia in foals and noninferior to the combination of azithromycin and rifampin. ANIMALS: A total of 240 foals on a farm endemic for infections caused by Rhodococcus equi. METHODS: In a controlled, randomized, and double-blinded clinical trial, foals with ultrasonographic pulmonary lesions (abscess score 10-15 cm) were allocated to 3 groups: 1-tulathromycin IM q 7 days (n = 80); 2-azithromycin-rifampin, orally q24h (n = 80); or 3-untreated controls (n = 80)...
April 19, 2017: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/28421278/an-efficient-method-to-enrich-for-knock-out-and-knock-in-cellular-clones-using-the-crispr-cas9-system
#18
Francesca Niccheri, Riccardo Pecori, Silvestro G Conticello
Clustered Regularly Interspaced Short Palindromic Repeats-associated protein 9 nuclease (CRISPR/Cas9) and Transcription Activator-Like Effector Nucleases (TALENs) are versatile tools for genome editing. Here we report a method to increase the frequency of Cas9-targeted cellular clones. Our method is based on a chimeric construct with a Blasticidin S Resistance gene (bsr) placed out-of-frame by a surrogate target sequence. End joining of the CRISPR/Cas9-induced double-strand break on the surrogate target can place the bsr in frame, thus providing temporary resistance to Blasticidin S: this is used to enrich for cells where Cas9 is active...
April 18, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28420959/transcranial-direct-current-stimulation-does-not-affect-lower-extremity-muscle-strength-training-in-healthy-individuals-a-triple-blind-sham-controlled-study
#19
Kazuhei Maeda, Tomofumi Yamaguchi, Tsuyoshi Tatemoto, Kunitsugu Kondo, Yohei Otaka, Satoshi Tanaka
The present study investigated the effects of anodal transcranial direct current stimulation (tDCS) on lower extremity muscle strength training in 24 healthy participants. In this triple-blind, sham-controlled study, participants were randomly allocated to the anodal tDCS plus muscle strength training (anodal tDCS) group or sham tDCS plus muscle strength training (sham tDCS) group. Anodal tDCS (2 mA) was applied to the primary motor cortex of the lower extremity during muscle strength training of the knee extensors and flexors...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28420403/molecular-surveillance-of-plasmodium-falciparum-drug-resistance-in-the-republic-of-congo-four-and-nine-years-after-the-introduction-of-artemisinin-based-combination-therapy
#20
Felix Koukouikila-Koussounda, Sankarganesh Jeyaraj, Christian N Nguetse, Charles Nchotebah Nkonganyi, Kossiwa Clarisse Kokou, Mandingha K Etoka-Beka, Francine Ntoumi, Thirumalaisamy P Velavan
BACKGROUND: Resistance to anti-malarial drugs hinders efforts on malaria elimination and eradication. Following the global spread of chloroquine-resistant parasites, the Republic of Congo adopted artemisinin-based combination therapy (ACT) in 2006 as a first-line treatment for uncomplicated malaria. To assess the impacts after implementation of ACT, a molecular surveillance for anti-malarial drug resistance was conducted in Congo 4 and 9 years after the introduction of ACT. METHODS: Blood samples of 431 febrile children aged 1-10 years were utilized from two previous studies conducted in 2010 (N = 311) and 2015 (N = 120)...
April 19, 2017: Malaria Journal
keyword
keyword
55378
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"