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https://www.readbyqxmd.com/read/28528514/tissue-metabolism-and-the-inflammatory-bowel-diseases
#1
REVIEW
Jordi M Lanis, Daniel J Kao, Erica E Alexeev, Sean P Colgan
The intestinal mucosa provides a selective barrier between the anaerobic lumen and a highly metabolic lamina propria. A number of recent studies indicate that acute inflammation of the mucosa can result in tissue hypoxia and associated shifts in tissue metabolism. The activation of hypoxia-inducible factor (HIF) under these conditions has been demonstrated to function as an endogenous molecular cue to promote resolution of inflammation, particularly through the orchestration of barrier repair toward homeostasis...
May 20, 2017: Journal of Molecular Medicine: Official Organ of the "Gesellschaft Deutscher Naturforscher und Ärzte"
https://www.readbyqxmd.com/read/28528488/enhanced-production-of-para-hydroxybenzoic-acid-by-genetically-engineered-saccharomyces-cerevisiae
#2
Nils J H Averesch, Alex Prima, Jens O Krömer
Saccharomyces cerevisiae is a popular organism for metabolic engineering; however, studies aiming at over-production of bio-replacement precursors for the chemical industry often fail to overcome proof-of-concept stage. When intending to show real industrial attractiveness, the challenge is twofold: formation of the target compound must be increased, while minimizing the formation of side and by-products to maximize titer, rate and yield. To tackle these, the metabolism of the organism, as well as the parameters of the process, need to be optimized...
May 20, 2017: Bioprocess and Biosystems Engineering
https://www.readbyqxmd.com/read/28528250/antifungal-toxicity-of-linear-geranylphenol-influence-of-oxigenate-substituents
#3
Lautaro Taborga, Maximiliano Sortino, Carrasco Héctor, Estefanía Butassi, Susana Zacchino, Luis Espinoza
Twenty four linear geranylphenols were evaluated for their antifungal properties against ATCC and clinical isolates of Candida albicans and Cryptococcus neoformans. For the analysis of their antifungal behavior the compounds were grouped into two series: (i) compounds with only one geranyl substituent on the benzene ring and (ii) compounds with two geranyl moieties on the benzene ring. Results showed that compounds of series (i) present better antifungal activities than those of series (ii). In addition, within group (i) all compounds showed better activities against C...
May 17, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28528116/ph-controllable-cell-penetrating-polypeptide-possessing-cancer-targeting
#4
DaeYong Lee, IlKoo Noh, Jisang Yoo, N Sanoj Rejinold, Yeu-Chun Kim
Helical peptides were naturally-occurring ordered conformations that mediated various biological functions essential for biotechnology. However, it was difficult for natural helical polypeptides to be applied in biomedical fields due to low bioavailability. To avoid these problems, synthetic alpha-helical polypeptides have recently been introduced by further modifying pendants in the side chain. In spite of an attractive biomimetic helical motif, these systems could not be tailored for targeted delivery mainly due to nonspecific binding events...
May 17, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28527782/protective-roles-of-bioactive-peptides-during-ischemia-reperfusion-injury-from-bench-to-bedside
#5
REVIEW
Dongdong Wu, Jun Wang, Honggang Wang, Ailing Ji, Yanzhang Li
Ischemia-reperfusion (I/R) is a well-known pathological condition which may lead to disability and mortality. I/R injury remains an unresolved and complicated situation in a number of clinical conditions, such as cardiac arrest with successful reanimation, as well as ischemic events in brain and heart. Peptides have many attractive advantages which make them suitable candidate drugs in treating I/R injury, such as low toxicity and immunogenicity, good solubility property, distinct tissue distribution pattern, and favorable pharmacokinetic profile...
May 17, 2017: Life Sciences
https://www.readbyqxmd.com/read/28527686/local-innate-responses-and-protective-immunity-after-intradermal-immunization-with-bovine-viral-diarrhea-virus-e2-protein-formulated-with-a-combination-adjuvant-in-cattle
#6
Sams M A Sadat, Marlene Snider, Ravendra Garg, Robert Brownlie, Sylvia van Drunen Littel-van den Hurk
Bovine viral diarrhea virus (BVDV) is one of the most serious pathogens in cattle. Recently, we developed a novel adjuvant platform (TriAdj) that includes a toll-like receptor 3 agonist, poly (I:C); an innate defense regulatory peptide; and water-soluble polymer, poly[di(sodiumcarboxylatoethylphenoxy)]-phosphazene (PCEP). To develop a needle-free intradermal (ID) subunit vaccine, the BVDV type-2 E2 protein was formulated with TriAdj, and immune protection was evaluated in calves against a BVDV-2 strain. Intradermal delivery of E2/TriAdj elicited robust virus neutralizing antibodies and cell-mediated immune responses including CD4(+) and CD8(+) T-cell responses...
May 17, 2017: Vaccine
https://www.readbyqxmd.com/read/28527466/highly-excited-electronic-image-states-of-metallic-nanorings
#7
Christian Fey, Henrik Jabusch, Johannes Knörzer, Peter Schmelcher
We study electronic image states around a metallic nanoring and show that the interplay between the attractive polarization force and a repulsive centrifugal force gives rise to Rydberg-like image states trapped several nanometers away from the surface. The nanoring is modeled as a perfectly conducting isolated torus whose classical electrostatic image potential is derived analytically. The image states are computed via a two-dimensional finite-difference scheme as solutions of the effective Schrödinger equation describing the outer electron subject to this image potential...
May 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28527449/correlated-matrix-fluctuation-mediated-activated-transport-of-dilute-penetrants-in-glass-forming-liquids-and-suspensions
#8
Rui Zhang, Kenneth S Schweizer
We formulate a microscopic, force-level statistical mechanical theory for the activated diffusion of dilute penetrants in dense liquids, colloidal suspensions, and glasses. The approach explicitly and self-consistently accounts for coupling between penetrant hopping and matrix dynamic displacements that actively facilitate the hopping event. The key new ideas involve two mechanistically (at a stochastic trajectory level) coupled dynamic free energy functions for the matrix and spherical penetrant particles...
May 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28527430/bjerrum-pairs-in-ionic-solutions-a-poisson-boltzmann-approach
#9
Ram M Adar, Tomer Markovich, David Andelman
Ionic solutions are often regarded as fully dissociated ions dispersed in a polar solvent. While this picture holds for dilute solutions, at higher ionic concentrations, oppositely charged ions can associate into dimers, referred to as Bjerrum pairs. We consider the formation of such pairs within the nonlinear Poisson-Boltzmann framework and investigate their effects on bulk and interfacial properties of electrolytes. Our findings show that pairs can reduce the magnitude of the dielectric decrement of ionic solutions as the ionic concentration increases...
May 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28527428/physicochemical-and-biological-interactions-between-cerium-oxide-nanoparticles-and-a-1-8-naphthalimide-derivative
#10
Gerardo Pulido-Reyes, Esperanza Martín, J L Gu Coronado, Francisco Leganes, Roberto Rosal, Francisca Fernández-Piñas
Cerium (Ce) oxide nanoparticles (CNPs) have attracted attention due to their high bioactivity and unique redox-chemistry. The oxygen vacancies at the surface of the nanoparticle explain the autocatalytic properties of CNPs in which the Ce(3+) atoms occupy the center of the oxygen vacancies surrounded by Ce(4+) atoms. Until now, CNPs have been associated with organic molecules at the synthesis stage to extend their applications or improve their stability. However, there is a lack of information regarding the post-synthesis interaction of CNPs and organic molecules that could enhance or induce new properties...
May 10, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28527298/enhanced-adsorption-performance-of-mos2-nanosheet-coated-mil-101-hybrids-for-the-removal-of-aqueous-rhodamine-b
#11
Cao Yang, Jianhua Cheng, Yuancai Chen, Yongyou Hu
A MoS2 nanosheet-coated chromium terephthalate MIL-101 octahedron hybrid (denoted as MoS2/MIL-101) was prepared via a simple hydrothermal reaction. The obtained MoS2/MIL-101 hybrid exhibited a significantly enhanced adsorption ability toward rhodamine B (RhB) as compared with pure MoS2, MIL-101, and the physical mixture of the two. The results demonstrate that the MoS2/MIL-101 hybrid had a high uptake capacity (Qm ≈ 344.8mgg(-1)) and fast adsorption rate for the removal of aqueous RhB. The excellent adsorption performance is likely related to the synergism of hydrogen bonding, π-π stacking interactions, and direct coordination between the MIL-101 substrate and RhB, as well as electrostatic interactions between MoS2 nanosheets and RhB...
May 10, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28527257/-polyclonal-antibodies-against-recombinant-dengue-virus-ns3-protein
#12
Liliana Morales, Myriam L Velandia, María Angélica Calderon, Jaime E Castellanos, Jacqueline Chaparro-Olaya
INTRODUCTION: Dengue is a disease caused by one of four serotypes of the dengue virus (DENV) and is endemic in approximately 130 countries. The incidence of dengue has increased dramatically in recent decades, as well as the frequency and magnitude of outbreaks. Despite all efforts, there are no prophylactic or therapeutic treatments for the disease. Accordingly, research on the processes governing the DENV infection cycle is essential to develop vaccines or antiviral therapies. One of themost attractive DENV molecules to investigate is nonstructural protein 3 (NS3), which is essential for viral replication and a major immune target for infection...
January 24, 2017: Biomédica: Revista del Instituto Nacional de Salud
https://www.readbyqxmd.com/read/28527250/-risk-of-transmission-of-chagas-disease-by-intrusion-of-triatomines-and-wild-mammals-in-bucaramanga-santander-colombia
#13
Marlene Reyes, Ángela Torres, Lyda Esteban, Mónica Flórez, Víctor Manuel Angulo
INTRODUCTION: Notice of triatomines in dwellings of some neighborhoods in Bucaramanga motivated the realization of this study.Objetive: To evaluate the intrusion of triatomines and mammals, as well as some risk factors in urban dwellings. MATERIALS AND METHODS: Triatomines were collected in a neighborhood in Bucaramanga, Santander, on a monthly basis during one year with participation of the community. Collection included manual search in lamp posts, use of light traps, animal bait, and chemical attractants in nearby forests...
January 24, 2017: Biomédica: Revista del Instituto Nacional de Salud
https://www.readbyqxmd.com/read/28527217/protein-phosphorylation-is-a-key-mechanism-in-alzheimer-s-disease
#14
Joana Oliveira, Márcio Costa, Maria Soares Cachide de Almeida, Odete A B da Cruz E Silva, Ana Gabriela Henriques
Altered protein phosphorylation states of several proteins are closely associated with Alzheimer's disease (AD). Among these are the amyloid-β precursor protein (AβPP) and the tau protein. In fact, altered protein phosphorylation states already provide strong biomarkers for AD diagnosis, as is the case with hyperphosphorylated tau. It follows that modulating signaling cascades provides an attractive avenue for exploring novel therapeutic strategies. This review focuses on some of the major protein kinases and protein phosphatases relevant to AD...
May 17, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28527194/biodistribution-and-excretion-of-colloidal-gold-nanoparticles-after-intravenous-injection-effects-of-particle-size
#15
Issei Takeuchi, Sho Nobata, Naoto Oiri, Keishiro Tomoda, Kimiko Makino
BACKGROUND: Inorganic gold nanoparticles (NPs) have a huge potential in targeted drug delivery. Simple preparation and surface modification procedure with their special physicochemical properties of gold NPs attract their use such as tumor targeting and the detection of cancerous cell. OBJECTIVE: Various studies were reported, however, details of biodistribution profile of gold NPs were not enough evaluated. We have studied biodistribution profile of gold NPs having various particle sizes (20, 50 and 100 nm)...
2017: Bio-medical Materials and Engineering
https://www.readbyqxmd.com/read/28527086/non-invasive-vagus-nerve-stimulation-nvns-as-symptomatic-treatment-of-migraine-in-young-patients-a-preliminary-safety-study
#16
Licia Grazzi, Gabriella Egeo, Eric Liebler, Anna Maria Padovan, Piero Barbanti
Recent clinical experiences and clinical trials have demonstrated the safety, tolerability, and efficacy of non-invasive vagus nerve stimulation (nVNS; gammaCore(®)) for the acute and prophylactic treatment of migraine. nVNS has a favorable adverse event profile, making it an attractive option for sensitive patient populations. We explored the safety, tolerability, and efficacy of nVNS as acute migraine treatment in adolescents. A group of adolescent patients suffering from migraine without aura were trained to use gammaCore to manage their migraine attacks...
May 2017: Neurological Sciences
https://www.readbyqxmd.com/read/28526990/how-does-supplementary-feeding-affect-endoparasite-infection-in-wild-boar
#17
Ragne Oja, Kaisa Velström, Epp Moks, Pikka Jokelainen, Brian Lassen
Supplementary feeding is widely used in game management but may aid the transmission of parasites. Firstly, feeding sites attract animals and may be regarded as high-risk areas for parasite transmission. Secondly, high host population densities resulting from and supported by supplementary feeding, as well as accumulation of parasites in the environment, may increase parasite prevalence. Our aim was to investigate whether host density or the number of feeding sites drives endoparasite infection in an Estonian wild boar (Sus scrofa) population...
May 19, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28526825/target-decoupling-in-coupled-systems-resistant-to-random-perturbation
#18
Sunkyu Yu, Xianji Piao, Namkyoo Park
To suppress unwanted crosstalks between nearby optical elements, the decoupling technique for integrated systems has been desired for the target control of light flows. Although cloaking methods have enabled complete decoupling of optical elements by manipulating electromagnetic waves microscopically, it is difficult to be applied rigorously to control each unit element in coupled systems due to severe restrictions on material parameters for cloaking. Here we develop the macroscopic approach to design crosstalk-free regions in coupled optical systems...
May 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28526787/development-of-multi-well-plate-methods-using-pure-cultures-of-methanogens-to-identify-new-inhibitors-for-suppressing-ruminant-methane-emissions
#19
M R Weimar, J Cheung, D Dey, C McSweeney, M Morrison, Y Kobayashi, W B Whitman, V Carbone, L R Schofield, R S Ronimus, G M Cook
Hydrogenotrophic methanogens typically require strictly anaerobic culturing conditions in glass tubes with overpressures of H2 and CO2 that are both time-consuming and costly. To increase the throughput for screening chemical compound libraries, 96-well microtiter plate methods for the growth of a marine (environmental) methanogen Methanococcus maripaludis strain S2 and the rumen methanogen Methanobrevibacter species AbM4 were developed. A number of key parameters (inoculum size, reducing agents for media preparation, duration of assay, inhibitor solvents and culture volume) were optimised to achieve robust and reproducible growth in a high-throughput microtiter plate format...
May 19, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28526612/histomorphological-observation-of-surgical-debridement-combined-with-negative-pressure-therapy-in-treatment-of-diabetic-foot
#20
Jiao-Yun Dong, Fei Song, Chun Qing, Shu-Liang Lu
PURPOSE: To further study the mechanism of epithelization on the fascia side of the flap after surgical incision and the treatment of the negative pressure therapy. METHODS: With the patients' informed consent, parts of tissue samples were obtained from a 51-year-old diabetic patient who was suffering lower extremity ulcers. The samples were processed with hematoxylin and eosin (HE) staining and Masson trichrome staining. The keratin 19, keratin 15 and carcino-embryonic antigen (CEA) were immunohistochemically detected...
April 20, 2017: Chinese Journal of Traumatology, Zhonghua Chuang Shang za Zhi
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