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https://www.readbyqxmd.com/read/29166573/interaction-of-hsp90-with-phospholipid-model-membranes
#1
Muhan Zhang, Daoying Wang, Pengpeng Li, Chong Sun, Rong Xu, Zhiming Geng, Weimin Xu, Zhaoqi Dai
Heat shock protein 90 (Hsp90) is an essential molecular chaperone with versatile functions in cell homeostatic control under both normal and stress conditions. Hsp90 has been found to be expressed on the cell surface, but the mechanism of Hsp90 association to the membrane remains obscure. In this study, the direct interaction of Hsp90 and phospholipid vesicles was characterized, and the role of Hsp90 on membrane physical state was explored. Using surface plasmon resonance (SPR), we observed a strong interaction between Hsp90 and different compositions of lipid...
November 19, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29165028/super-recognition-in-development-a-case-study-of-an-adolescent-with-extraordinary-face-recognition-skills
#2
Rachel J Bennetts, Joseph Mole, Sarah Bate
Face recognition abilities vary widely. While face recognition deficits have been reported in children, it is unclear whether superior face recognition skills can be encountered during development. This paper presents O.B., a 14-year-old female with extraordinary face recognition skills: a "super-recognizer" (SR). O.B. demonstrated exceptional face-processing skills across multiple tasks, with a level of performance that is comparable to adult SRs. Her superior abilities appear to be specific to face identity: She showed an exaggerated face inversion effect and her superior abilities did not extend to object processing or non-identity aspects of face recognition...
November 22, 2017: Cognitive Neuropsychology
https://www.readbyqxmd.com/read/29164479/spectro-analytical-computational-and-in-vitro-biological-studies-of-novel-substituted-quinolone-hydrazone-and-it-s-metal-complexes
#3
Narsimha Nagula, Sudeepa Kunche, Mohmed Jaheer, Ravi Mudavath, Sreekanth Sivan, Sarala Devi Ch
Some novel transition metal [Cu (II), Ni (II) and Co (II)] complexes of nalidixic acid hydrazone have been prepared and characterized by employing spectro-analytical techniques viz: elemental analysis, (1)H-NMR, Mass, UV-Vis, IR, TGA-DTA, SEM-EDX, ESR and Spectrophotometry studies. The HyperChem 7.5 software was used for geometry optimization of title compound in its molecular and ionic forms. Quantum mechanical parameters, contour maps of highest occupied molecular orbitals (HOMO) and lowest unoccupied molecular orbitals (LUMO) and corresponding binding energy values were computed using semi empirical single point PM3 method...
November 21, 2017: Journal of Fluorescence
https://www.readbyqxmd.com/read/29163579/arabidopsis-phosphatidic-acid-phosphohydrolases-are-essential-for-growth-under-nitrogen-depleted-conditions
#4
Yushi Yoshitake, Ryoichi Sato, Yuka Madoka, Keiko Ikeda, Masato Murakawa, Ko Suruga, Daisuke Sugiura, Ko Noguchi, Hiroyuki Ohta, Mie Shimojima
The Arabidopsis homologs of mammalian lipin, PAH1 and PAH2, are cytosolic phosphatidic acid phosphohydrolases that are involved in phospholipid biosynthesis and are essential for growth under phosphate starvation. Here, pah1 pah2 double-knockout mutants were found to be hypersensitive to nitrogen (N) starvation, whereas transgenic plants overexpressing PAH1 or PAH2 in the pah1 pah2 mutant background showed a similar growth phenotype as compared with wild type (WT) under N starvation. The chlorophyll content of pah1 pah2 was significantly lower than that of WT, whereas the chlorophyll content and photosynthetic activity of the transgenic plants were significantly higher than those of WT under N-depleted conditions...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29163194/on-the-metabolism-of-exogenous-ketones-in-humans
#5
Brianna J Stubbs, Pete J Cox, Rhys D Evans, Peter Santer, Jack J Miller, Olivia K Faull, Snapper Magor-Elliott, Satoshi Hiyama, Matthew Stirling, Kieran Clarke
Background and aims: Currently there is considerable interest in ketone metabolism owing to recently reported benefits of ketosis for human health. Traditionally, ketosis has been achieved by following a high-fat, low-carbohydrate "ketogenic" diet, but adherence to such diets can be difficult. An alternative way to increase blood D-β-hydroxybutyrate (D-βHB) concentrations is ketone drinks, but the metabolic effects of exogenous ketones are relatively unknown. Here, healthy human volunteers took part in three randomized metabolic studies of drinks containing a ketone ester (KE); (R)-3-hydroxybutyl (R)-3-hydroxybutyrate, or ketone salts (KS); sodium plus potassium βHB...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29163007/from-mice-to-mole-rats-species-specific-modulation-of-adult-hippocampal-neurogenesis
#6
Maria K Oosthuizen
Rodent populations living in their natural environments have very diverse ecological and life history profiles that may differ substantially from that of conventional laboratory rodents. Free-living rodents show species-specific neurogenesis that are dependent on their unique biology and ecology. This perspective aims to illustrate the benefit of studying wild rodent species in conjunction with laboratory rodents. African mole-rats are discussed in terms of habitat complexity, social structures, and longevity...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29162326/identifying-perceptions-of-academic-reform-in-pharmacy-using-a-four-frame-organizational-change-model
#7
Dalia Bajis, Betty Chaar, Iman A Basheti, Rebekah Moles
BACKGROUND: In an ever-changing environment, pharmacy education is in the race to catch up and excel to produce competent pharmacists. Examining academic institutions, including schools of pharmacy, their internal systems and framework, it seems appropriate to view these institutions using multiple lenses. Bolman and Deal conceptualized a method to examine organizations using four constructs (structural, human resource, political, and symbolic). The Eastern Mediterranean Region (EMR), with deep-rooted pharmacy education and practice was the setting for this research...
November 10, 2017: Research in Social & Administrative Pharmacy: RSAP
https://www.readbyqxmd.com/read/29161032/transfer-and-dynamic-inversion-of-co-assembled-supramolecular-chirality-through-2d-sheet-to-rolled-up-tubular-structure
#8
Heekyoung Choi, Kang Jin Cho, Hyowon Seo, Junho Ahn, Jinying Liu, Shim Sung Lee, Hyungjun Kim, Chuanliang Feng, Jong Hwa Jung
Transfer and inversion of supramolecular chirality from chiral ca-lix[4]arene analogs (3D and 3L) with an alanine moiety to an achi-ral bipyridine derivative (1) with glycine moieties in a co-assembled hydrogel are demonstrated. Molecular chirality of 3D and 3L could transfer supramolecular chirality to an achiral bipyridine derivative 1. Moreover, the addition of 0.6 equiv. of 3D or 3L to 1 induced the supramolecular chirality inversion of 1. More interestingly, the 2D-sheet structure of the co-assembled hydrogels formed with 0...
November 21, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29155912/a-novel-sulfonamide-non-classical-carbenoid-a-mechanistic-study-for-the-synthesis-of-enediynes
#9
Theodore O P Hayes, Ben Slater, Richard A J Horan, Marc Radigois, Jonathan D Wilden
Alkynyl sulfonamides undergo sequential 1,4- then 1,2-addition/rearrangement with lithium acetylides to yield enediynes in the absence of any promoters or catalysts. Mechanistic investigations suggest that the reaction proceeds via 1,4-conjugate addition of the nucleophile to the unsaturated system to give a key alkenyl lithium species which is stabilised by an intramolecular coordination effect by a sulfonamide oxygen atom. This species can be considered a vinylidene carbenoid given the carbon atom bears both an anion (as a vinyllithium) and a leaving group (the sulfonamide)...
November 20, 2017: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/29150360/changes-in-the-epidemiology-and-distribution-of-the-hepatitis-c-virus-genotypes-in-north-eastern-spain-over-the-last-35-years
#10
Doroteo Acero Fernández, María José Ferri Iglesias, María Buxó Pujolràs, Carmen López Nuñez, Isabel Serra Matamala, Xavier Queralt Molés, Xavier Aldeguer Manté
BACKGROUND: Genotypic distribution and epidemiology of HCV infection in Western Europe countries has changed over the last decades. AIM: To establish the local genotypic profile and characterize the associated demographic variables. MATERIAL AND METHOD: All the genotyping from 1988 to 2015 were considered. Associated demographic variables were included in logistic regression models. Genotyping was carried out with updated commercial kits. RESULTS: Genotype 1b was the most prevalent (42...
November 14, 2017: Gastroenterología y Hepatología
https://www.readbyqxmd.com/read/29143790/deep-eutectic-solvents-dess-for-the-isolation-of-willow-lignin-salix-matsudana-cv-zhuliu
#11
Tengfei Li, Gaojin Lyu, Yu Liu, Rui Lou, Lucian A Lucia, Guihua Yang, Jiachuan Chen, Haroon A M Saeed
Deep eutectic solvents (DESs) are a potentially high-value lignin extraction methodology. DESs prepared from choline chloride (ChCl) and three hydrogen-bond donors (HBD)-lactic acid (Lac), glycerol, and urea-were evaluated for isolation of willow (Salix matsudana cv. Zhuliu) lignin. DESs types, mole ratio of ChCl to HBD, extraction temperature, and time on the fractionated DES-lignin yield demonstrated that the optimal DES-lignin yield (91.8 wt % based on the initial lignin in willow) with high purity of 94...
October 28, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29138211/transcriptome-sequencing-of-the-naked-mole-rat-heterocephalus-glaber-and-identification-of-hypoxia-tolerance-genes
#12
Bang Xiao, Li Li, Chang Xu, Shanmin Zhao, Lifang Lin, Jishuai Cheng, Wenjing Yang, Wei Cong, Guanghan Kan, Shufang Cui
The naked mole rat (NMR; Heterocephalus glaber) is a small rodent species found in regions of Kenya, Ethiopia and Somalia. It has a high tolerance for hypoxia and is thus, considered one of the most important natural models for studying hypoxia tolerance mechanisms. The various mechanisms underlying the NMR's hypoxia tolerance are beginning to be understood at different levels of organization, and next-generation sequencing methods promise to expand this understanding to the level of gene expression. In this study, we examined the sequence and transcript abundance data of the muscle transcriptome of NMRs exposed to hypoxia using the Illumina HiSeq 2500 system to clarify the possible genomic adaptive responses to the hypoxic underground surroundings...
November 14, 2017: Biology Open
https://www.readbyqxmd.com/read/29136324/proton-transfer-reaction-dynamics-of-pyranine-in-dmso-water-mixture
#13
Prabhat Kumar Singh, Ankur Awasthi
Photo-induced intermolecular excited-state proton transfer (ESPT) reactions are ubiquitous in chemistry and biology. ESPT reactions are extremely sensitive to the nature of water molecules in its microenvironment and thus serve as a sensitive reporter for the water structure and dynamics in a system. Herein, the photo-induced intermolecular ESPT reaction of 8-Hydroxy pyrene-1, 3, 5-trisulfonic acid (HPTS, also known as Pyranine) has been investigated in various DMSO-water mixtures using steady-state and time-resolved emission spectroscopy...
November 14, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/29133662/a-tiny-tick-can-cause-a-big-health-problem
#14
Manuel John, M Raman, Keith Ryan
Ticks are tiny crawling bugs in the spider family that feed by sucking blood from animals. They are second only to mosquitoes as vectors of human disease, both infectious and toxic. Infected ticks spread over a hundred diseases, some of which are fatal if undetected. They spread the spirochete (which multiplies in the insect's gut) with a subsequent bite to the next host. We describe the only reported cases of peri ocular tick bite from India that presented to us within a span of 3 days and its management. Due suspicion and magnification of the lesions revealed the ticks which otherwise masqueraded as small skin tags/moles on gross examination...
November 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29133115/structural-features-of-the-interaction-of-the-3-untranslated-region-of-mrna-containing-exosomal-rna-specific-motifs-with-yb-1-a-potential-mediator-of-mrna-sorting
#15
Darya D Yanshina, Olga A Kossinova, Alexander V Gopanenko, Olga A Krasheninina, Alexey A Malygin, Alia G Ven'yaminova, Galina G Karpova
We have previously shown that YB-1 is the only protein of the HEK293 cell cytoplasmic (S100) extract that specifically interacts with RNA hairpins each containing one of the motifs ACCAGCCU (1), CAGUGAGC (2) and UAAUCCCA (3), which had been identified as often found in exosomal RNA and proposed as potential cis-acting elements targeting RNAs into exosomes. Here we explored the interactions of YB-1 with a fragment of the 3'-untranslated region (UTR) of septin 14 mRNA (SEPT14 RNA), which contains all three motifs...
November 10, 2017: Biochimie
https://www.readbyqxmd.com/read/29132195/current-evidence-for-the-use-of-n-acetylcysteine-following-liver-resection
#16
REVIEW
Richard Kemp, Jonathan Mole, Dhanny Gomez
BACKGROUND: N-acetylcysteine (NAC) has many uses in medicine; notable in the management of paracetamol toxicity, acute liver failure and liver surgery. The aim of this review was to critically appraise the published literature for the routine use of NAC in liver resection surgery. METHODS: An electronic search was performed of EBSCOhost (Medline and CINAHL database), PubMed and the Cochrane Library for the period 1990-2016. MeSH headings: 'acetyl-cysteine', 'liver resection' and 'hepatectomy' were used to identify all relevant articles published in English...
November 13, 2017: ANZ Journal of Surgery
https://www.readbyqxmd.com/read/29131959/computational-and-experimental-study-of-thermodynamics-of-the-reaction-of-titania-and-water-at-high-temperatures
#17
Quynhgiao N Nguyen, Charles W Bauschlicher, Dwight L Myers, Nathan S Jacobson, Elizabeth J Opila
The volatility of titanium dioxide (TiO2) in water vapor-containing environments at elevated temperatures is studied with both quantum chemical composite methods and the experimental transpiration method. The geometry and harmonic vibrational frequencies of TiO(OH)2(g) and Ti(OH)4(g) were computed using the coupled-cluster singles and doubles method with a perturbative correction for connected triple substitutions [CCSD(T)]. The B3LYP density functional theory was used to compute corrections to the harmonic approximations...
November 13, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/29128724/fabrication-and-characterization-of-novel-iodine-doped-hollow-and-mesoporous-hematite-fe2o3-particles-derived-from-sol-gel-method-and-their-photocatalytic-performances
#18
Selim Demirci, Metin Yurddaskal, Tuncay Dikici, Cevat Sarıoğlu
In this work, iodine (I) doped hollow and mesoporous Fe2O3 photocatalyst particles were fabricated for the first time through sol-gel method. Phase structure, surface morphology, particle size, specific surface area and optical band gap of the synthesized Fe2O3 photocatalysts were analyzed by X-ray diffraction (XRD), field emission scanning electron microscope (FESEM), X-ray photoelectron spectroscopy (XPS), BET surface analysis, particle size analyzer and UV-vis diffuse reflectance spectrum (UV-vis DRS), respectively...
November 7, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29127937/reduction-sensitive-mixed-micelles-assembled-from-amphiphilic-prodrugs-for-self-codelivery-of-dox-and-dtx-with-synergistic-cancer-therapy
#19
Jilian Wu, Huiyuan Zhang, Xu Hu, Ruiling Liu, Wei Jiang, Zhonghao Li, Yuxia Luan
Clinically, codelivery of chemotherapeutics has been limited by poor water-solubility and severe systemic toxicity. In this work, we developed a new reduction-sensitive mixed micellar system for self-codelivery of doxorubicin (DOX) and docetaxel (DTX). Biodegradable methoxy poly(ethylene glycol)-poly(ε-caprolactone) (mPEG-PCL) was coupled with DOX and DTX by a reduction-sensitive disulfide bond, resulting in mPEG-PCL-SS-DOX and mPEG-PCL-SS-DTX, respectively. mPEG-PCL-SS-DOX was mixed with mPEG-PCL-SS-DTX at a mole ratio of 1:1 in water, forming a mixed micellar system...
November 6, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29127411/performance-of-solid-state-hybrid-energy-storage-device-using-reduced-graphene-oxide-anchored-sol-gel-derived-ni-nio-nanocomposite
#20
Himadri Tanaya Das, Kamaraj Mahendraprabhu, Thandavarayan Maiyalagan, Perumal Elumalai
The influence of (nickel nitrate/citric acid) mole ratio on the formation of sol-gel end products was examined. The formed Ni/NiO nanoparticle was anchored on to reduced graphene-oxide (rGO) by means of probe sonication. It was found that the sample obtained from the (1:1) nickel ion: citric acid (Ni(2+): CA) mole ratio resulted in a high specific capacity of 158 C/g among all (Ni(2+): CA) ratios examined. By anchoring Ni/NiO on to the rGO resulted in enhanced specific capacity of as high as 335 C/g along with improved cycling stability, high rate capability and Coulombic efficiency...
November 10, 2017: Scientific Reports
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