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https://www.readbyqxmd.com/read/28637347/mechanisms-underlying-the-long-term-survival-of-the-monocot-dracaena-marginata-under-drought-conditions
#1
Radek Jupa, Roman Plichta, Zuzana Paschová, Nadezhda Nadezhdina, Roman Gebauer
Efficient water management is essential for the survival of vascular plants under drought stress. While interrelations among drought stress, plant anatomy and physiological functions have been described in woody dicots, similar research is very limited for non-palm arborescent and shrubby monocots despite their generally high drought tolerance. In this study, potted transplants of Dracaena marginata Lam. in primary growth stage were exposed to several short- and long-term drought periods. Continuous measurements of sap flow and stem diameter, the evaluation of capacitance and leaf conductance, the quantification of non-structural carbohydrates (NSC), and organ-specific anatomical analyses were performed to reveal the mechanisms promoting plant resistance to limited soil moisture...
June 14, 2017: Tree Physiology
https://www.readbyqxmd.com/read/28636951/structure-of-cc-chemokine-receptor-5-with-a-potent-chemokine-antagonist-reveals-mechanisms-of-chemokine-recognition-and-molecular-mimicry-by-hiv
#2
Yi Zheng, Gye Won Han, Ruben Abagyan, Beili Wu, Raymond C Stevens, Vadim Cherezov, Irina Kufareva, Tracy M Handel
CCR5 is the primary chemokine receptor utilized by HIV to infect leukocytes, whereas CCR5 ligands inhibit infection by blocking CCR5 engagement with HIV gp120. To guide the design of improved therapeutics, we solved the structure of CCR5 in complex with chemokine antagonist [5P7]CCL5. Several structural features appeared to contribute to the anti-HIV potency of [5P7]CCL5, including the distinct chemokine orientation relative to the receptor, the near-complete occupancy of the receptor binding pocket, the dense network of intermolecular hydrogen bonds, and the similarity of binding determinants with the FDA-approved HIV inhibitor Maraviroc...
June 20, 2017: Immunity
https://www.readbyqxmd.com/read/28636809/visible-light-driven-aza-ortho-quinone-methide-generation-enables-a-multicomponent-reaction
#3
Wen-Jing Xiao, Yi-Ying Liu, Xiao-Ye Yu, Miao-Maio Qiao, Xiaotian Qi, Jia-Rong Chen, De-Qing Shi
A visible light photoredox-catalyzed and radical-mediated strategy for the in situ generation of aza-ortho-quinone methides from readily accessible alkenylanilines and alkyl radical precursors has been accomplished for the first time. This protocol enables an efficient multicomponent cascade reaction of alkenylanilines, halides and sulfur ylides, and shows wide substrate scope and high functional group tolerance with respect to each component. Treatment of the initially formed cycloaddition products with a base leads to a convergent and streamlined synthesis of densely functionalized indoles in a single flask operation...
June 21, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28636808/diversity-and-abundance-of-human-pathogenic-fungi-associated-with-pigeon-feces-in-urban-environments
#4
Won Dong Lee, Jonathan J Fong, John A Eimes, Young Woon Lim
Pathogenic fungi are a growing health concern worldwide, particularly in large, densely populated cities. The dramatic upsurge of pigeon populations in cities has been implicated in the increased incidence of invasive fungal infections. In the current study, we used a culture-independent, high-throughput sequencing approach to describe the diversity of clinically relevant fungi (CRF) associated with pigeon feces and map the relative abundance of CRF across Seoul, Korea. In addition, we tested whether certain geographical, sociological, and meteorological factors were significantly associated with the diversity and relative abundance of CRF...
June 21, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28636384/role-of-crystal-structure-and-chalcogenide-redox-properties-on-the-oxidative-assembly-of-cadmium-chalcogenide-nanocrystals
#5
Jessica Davis, Aaron M Chalifoux, Stephanie L Brock
Oxidative assembly of metal chalcogenide nanocrystals (NCs) enables formation of 2-D (dense) and 3-D porous structures without the presence of intervening ligands between particles that can moderate transport properties. This route has been demonstrated successful for a range of single component structures including CdQ, PbQ and ZnQ (Q = S, Se, Te). En route to controllable assembly of multicomponent nanostructures, the roles of Q redox properties (2Q2-  Q22- + 2e), responsible for particle crosslinking, and the native structure (cubic zinc blende vs...
June 21, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28636203/directional-matrix-nanotopography-with-varied-sizes-for-engineering-wound-healing
#6
Jangho Kim, Won-Gyu Bae, Yeon Ju Kim, Hoon Seonwoo, Han-Wool Choung, Kyoung-Je Jang, Sunho Park, Bog Hee Kim, Hong-Nam Kim, Kyoung Soon Choi, Myung-Sun Kim, Pill-Hoon Choung, Yun-Hoon Choung, Jong Hoon Chung
Topographic features play a crucial role in the regulation of physiologically relevant cell and tissue functions. Here, an analysis of feature-size-dependent cell-nanoarchitecture interactions is reported using an array of scaffolds in the form of uniformly spaced ridge/groove structures for engineering wound healing. The ridge and groove widths of nanopatterns are varied from 300 to 800 nm and the nanotopography features are classified into three size ranges: dense (300-400 nm), intermediate (500-600 nm), and sparse (700-800 nm)...
June 21, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28635630/development-of-a-high-density-snp-based-linkage-map-and-detection-of-qtl-for-%C3%AE-glucans-protein-content-grain-yield-per-spike-and-heading-time-in-durum-wheat
#7
Ilaria Marcotuli, Agata Gadaleta, Giacomo Mangini, Antonio Massimo Signorile, Silvana Addolorata Zacheo, Antonio Blanco, Rosanna Simeone, Pasqualina Colasuonno
High-density genetic linkage maps of crop species are particularly useful in detecting qualitative and quantitative trait loci for important agronomic traits and in improving the power of classical approaches to identify candidate genes. The aim of this study was to develop a high-density genetic linkage map in a durum wheat recombinant inbred lines population (RIL) derived from two elite wheat cultivars and to identify, characterize and correlate Quantitative Trait Loci (QTL) for β-glucan, protein content, grain yield per spike and heading time...
June 21, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28635522/dietary-intake-among-opioid-and-alcohol-using-pregnant-women
#8
Shikhar Shrestha, Elizabeth Jimenez, Laura Garrison, Peter Pribis, Dennis W Raisch, Julia M Stephen, Ludmila N Bakhireva
BACKGROUND: Substance abuse in nonpregnant adults has been associated with increased intake in calories and decreased intake of nutrient-dense foods; however, studies examining dietary intake in opioid-using and alcohol-using pregnant women are lacking. OBJECTIVE: The objective of this study was to evaluate dietary intake in opioid-using pregnant women with or without concurrent light-to-moderate alcohol use as compared to abstaining controls. METHODS: This prospective birth cohort included 102 pregnant women classified into four study groups: controls (n = 27), medication-assisted treatment (MAT; n = 26), alcohol (ALC; n = 22), and concurrent use of both substances (MAT + ALC; n = 27)...
February 22, 2017: Substance Use & Misuse
https://www.readbyqxmd.com/read/28635272/efficient-flame-retardant-and-smoke-suppression-properties-of-mg-al-layered-double-hydroxide-nanostructures-on-wood-substrate
#9
Bingtuo Guo, Yongzhuang Liu, Qi Zhang, Fengqiang Wang, Qingwen Wang, Yixing Liu, Jian Li, Haipeng Yu
Improving the flame retardancy of wood is an imperative, yet highly challenging step in the application of wood in densely populated spaces. In this study, Mg-Al layered double hydroxide (LDH) coating was successfully fabricated on a wood substrate to confer flame-retardant and smoke-suppression properties. The chemical compositions and bonding states characterized by energy-dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy confirmed the coating constituents of Mg-Al LDH. The coating evenly covered the sample wood surfaces and provided both mechanical enhancement and flame-retardancy effects...
June 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28634208/ligand-and-voltage-gated-ca-2-channels-differentially-regulate-the-mode-of-vesicular-neuropeptide-release-in-mammalian-sensory-neurons
#10
Yeshi Wang, Qihui Wu, Meiqin Hu, Bin Liu, Zuying Chai, Rong Huang, Yuan Wang, Huadong Xu, Li Zhou, Lianghong Zheng, Changhe Wang, Zhuan Zhou
Neuropeptides released from dorsal root ganglion (DRG) neurons play essential roles in the neurotransmission of sensory inputs, including those underlying nociception and pathological pain. Neuropeptides are released from intracellular vesicles through two modes: a partial release mode called "kiss-and-run" (KAR) and a full release mode called "full fusion-like" (FFL). Using total internal reflection fluorescence (TIRF) microscopy, we traced the release of pH-sensitive green fluorescent protein-tagged neuropeptide Y (pHluorin-NPY) from individual dense-core vesicles in the soma and axon of single DRG neurons after Ca(2+) influx through either voltage-gated Ca(2+) channels (VGCCs) or ligand-gated transient receptor potential vanilloid 1 (TRPV1) channels...
June 20, 2017: Science Signaling
https://www.readbyqxmd.com/read/28634192/a-new-enzyme-linked-immunosorbent-assay-system-for-human-serum-hepatic-triglyceride-lipase
#11
Kazuya Miyashita, Katsuyuki Nakajima, Isamu Fukamachi, Yuji Muraba, Takafumi Koga, Yohnosuke Shimomura, Tetsuyo Machida, Masami Murakami, Junji Kobayashi
There is no previously established method for measuring human hepatic triglyceride lipase (HTGL) concentration in serum. In this study, we developed new monoclonal antibodies (MoAb mouse 9A1, MoAb rat 141A1) that react with both HTGL in serum and in post-heparin plasma (PHP) and established a novel enzyme-linked immunosorbent assay (ELISA) system for measuring serum HTGL as well as PHP-HTGL concentrations. To confirm the specificity of MoAb, we performed an immunoprecipitation -immunoblotting analysis. Both MoAb mouse 9A1and MoAb rat 141 A1 were able to immunoprecipitate not only recombinant HTGL and PHP-HTGL but also serum HTGL, demonstrating that HTGL exists in serum obtained without heparin injection...
June 20, 2017: Journal of Lipid Research
https://www.readbyqxmd.com/read/28633426/atypical-histiocytoid-cells-in-metastatic-papillary-thyroid-carcinoma-an-underrecognized-cytologic-pattern
#12
Mariana Canepa, Tarik M Elsheikh, Debra A Sabo, Ashley M Kolosiwsky, Jordan P Reynolds
Objectives: Fine-needle aspiration (FNA) of head and neck lymph nodes (LNs) is useful in diagnosing metastatic papillary thyroid carcinoma (PTC) and most commonly shows classic cytologic features of PTC. Metastatic PTC, however, may occasionally present with a pattern unfamiliar to most pathologists: atypical histiocytoid cells (AHCs). Methods: All PTC thyroidectomy specimens with associated FNA of LNs were retrieved from our files for 2007 to 2013. We aimed to assess cytologic features of metastatic PTC, as well as the presence of AHCs and their morphology...
June 15, 2017: American Journal of Clinical Pathology
https://www.readbyqxmd.com/read/28632899/novel-intracytoplasmic-inclusions-immunoreactive-for-phosphorylated-tdp43-and-cystatin-c-in-anterior-horn-cells-in-a-case-of-sporadic-amyotrophic-lateral-sclerosis
#13
Masayuki Shintaku, Daita Kaneda, Kiyomitsu Oyanagi
Novel intracytoplasmic inclusions immunoreactive for phosphorylated transactivation response DNA-binding protein 43 (p-TDP43), cystatin C, and transferrin were found in anterior horn cells in a case of sporadic amyotrophic lateral sclerosis (ALS). The patient was a 59-year-old woman, who died of ALS after a clinical course of 8 years. She had been receiving mechanical support for respiration for 6 years and in a "totally locked-in" state for 4 years prior to death. The spinal cord showed severe degeneration involving the anterior and lateral funiculi, whereas the posterior funiculus was preserved...
June 20, 2017: Neuropathology: Official Journal of the Japanese Society of Neuropathology
https://www.readbyqxmd.com/read/28632811/management-of-poorly-controlled-indolent-systemic-mastocytosis-using-narrowband-uvb-phototherapy
#14
Zain Husain, Dylan Waterman, Kathleen Ellison, Jennifer A DeSimone
The mastocytoses comprise a group of proliferative stem cell disorders defined by the abnormal accumulation of mast cells (MCs) in the skin or other body tissues including the bone marrow, gastrointestinal tract, and liver. Systemic mastocytosis is defined by the presence of one major and one minor criterion or 3 minor criteria delineated by the World Health Organization (WHO). We present the case of a 57-year-old woman with a 10-year history of red-brown pruritic maculopapular lesions on the upper and lower extremities and trunk who was originally diagnosed with cutaneous mastocytosis...
May 2017: Cutis; Cutaneous Medicine for the Practitioner
https://www.readbyqxmd.com/read/28632734/choroidal-thickness-in-patients-with-coronary-artery-disease
#15
Meleha Ahmad, Patrick A Kaszubski, Lucy Cobbs, Harmony Reynolds, Roland Theodore Smith
PURPOSE: To evaluate choroidal thickness (CTh) in patients with coronary artery disease (CAD) compared to healthy controls. DESIGN: Cross-sectional. METHODS: Setting: Ambulatory clinic of a large city hospital. Patient population: Thirty-four patients had documented CAD, defined as history of >50% obstruction in at least one coronary artery on cardiac catheterization, positive stress test, ST elevation myocardial infarction, or revascularization procedure...
2017: PloS One
https://www.readbyqxmd.com/read/28632390/atomistic-simulation-derived-insight-on-the-irreversible-structural-changes-of-si-electrode-during-fast-and-slow-delithiation
#16
Kwang Jin Kim, James Wortman, Sung-Yup Kim, Yue Qi
Quantifying the irreversible chemical and structural changes of Si during cycling remains challenging. In this study, a continuous reactive molecular dynamics delithiation algorithm, with well-controlled potential gradient and delithiation rate, was developed and used to investigate the "natural" delithiation responses of an aluminum-oxide coated silicon thin-film. Fast delithiation led to the formation of dense Si network near the surface and nanoporosity inside the a-LixSi, resulting in 141 % volume dilation and significant amount of Li trapped inside (a-Li1...
June 20, 2017: Nano Letters
https://www.readbyqxmd.com/read/28632260/visualization-of-the-protein-corona-towards-a-biomolecular-understanding-of-nanoparticle-cell-interactions
#17
Maria Kokkinopoulou, Johanna Simon, Katharina Landfester, Volker Mailänder, Ingo Lieberwirth
The use of nanocarriers in biology and medicine is complicated by the current need to understand how nanoparticles interact in complex biological surroundings. When nanocarriers come into contact with serum, proteins immediately adsorb onto their surface, forming a protein corona which defines their biological identity. Although the composition of the protein corona has been widely determined by proteomics, its morphology still remains unclear. In this study we show for the first time the morphology of the protein corona using transmission electron microscopy...
June 20, 2017: Nanoscale
https://www.readbyqxmd.com/read/28631793/organic-inorganic-macroion-coacervate-complexation
#18
Benxin Jing, Jie Qiu, Yingxi Zhu
Coacervate complexes that are liquid-liquid separated complex materials are often formed by stoichiometrically mixing oppositely charged polyelectrolytes in salted aqueous solution. Entropy-driven ion pairing, resulting from the release of counterions near polyelectrolytes, has been identified as the primary driving force for coacervate formation between oppositely charged polyelectrolytes, including proteins and DNA, in aqueous solution. In this work we have examined the complexation between net neutral zwitterionic poly(sulfobetaine methacrylate) (PSBMA) and inorganic polyoxometalate (POM) polyanions in LiCl aqueous solutions...
June 20, 2017: Soft Matter
https://www.readbyqxmd.com/read/28631552/effect-of-2-3-4-4-5-pentachlorobiphenyl-exposure-on-endometrial-receptivity-and-the-methylation-of-hoxa10
#19
Xin-Lan Qu, Ming-Zhang, Yuan-Fang, Hui Wang, Yuan-Zhen Zhang
Polychlorinated biphenyls (PCBs) are one of the most common endocrine-disrupting chemicals and have obvious toxicity on human reproductive development. The aim of our study was to investigate the toxicity of chronic 2,3',4,4',5-pentachlorobiphenyl (PCB 118) exposure on embryo implantation and endometrial receptivity, with the possible mechanism of DNA methylation involved. Virgin CD-1 female mice (3 weeks old) were housed and orally treated with PCB 118 (0, 1, 10, 100 μg/kg) for a month. After mating with fertile males, the pregnant mice were killed on gestation day 4...
January 1, 2017: Reproductive Sciences
https://www.readbyqxmd.com/read/28631324/recent-origin-and-rapid-speciation-of-neotropical-orchids-in-the-world-s-richest-plant-biodiversity-hotspot
#20
Oscar Alejandro Pérez-Escobar, Guillaume Chomicki, Fabien L Condamine, Adam P Karremans, Diego Bogarín, Nicholas J Matzke, Daniele Silvestro, Alexandre Antonelli
The Andean mountains of South America are the most species-rich biodiversity hotspot worldwide with c. 15% of the world's plant species, in only 1% of the world's land surface. Orchids are a key element of the Andean flora, and one of the most prominent components of the Neotropical epiphyte diversity, yet very little is known about their origin and diversification. We address this knowledge gap by inferring the biogeographical history and diversification dynamics of the two largest Neotropical orchid groups (Cymbidieae and Pleurothallidinae), using two unparalleled, densely sampled orchid phylogenies (including more than 400 newly generated DNA sequences), comparative phylogenetic methods, geological and biological datasets...
July 2017: New Phytologist
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