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https://www.readbyqxmd.com/read/29684591/in-vitro-and-in-vivo-activity-of-opioid-cyclopeptide-with-mu-delta-agonist-profile-biased-toward-%C3%AE-arrestin
#1
Katarzyna Gach-Janczak, Justyna Piekielna-Ciesielska, Anna Adamska-Bartłomiejczyk, Karol Wtorek, Federica Ferrari, Girolamo Calo, Agata Szymaszkiewicz, Joanna Piasecka-Zelga, Anna Janecka
Replacement of the tyrosine residue in the mu-selective opioid ligand Tyr-c[D-Lys-Phe-Asp]NH2 with 2',6'-dimethyltyrosine (Dmt) produced a cyclopeptide Dmt-c[D-Lys-Phe-Asp]NH2 with mu/delta opioid receptor agonist profile. This new analog showed improved antinociception in the hot-plate test as compared to the parent but also significantly inhibited the gastrointestinal transit. Using the bioluminescence resonance energy transfer (BRET) assay it was shown that this analog was biased toward β-arrestin.
April 20, 2018: Peptides
https://www.readbyqxmd.com/read/29682906/profiles-of-streptococcus-thermophilus-mn-zlw-002-nutrient-requirements-in-controlled-ph-batch-fermentations
#2
Gefei Liu, Yali Qiao, Yanjiao Zhang, Cong Leng, Jiahui Sun, Hongyu Chen, Yan Zhang, Aili Li, Zhen Feng
This study aimed to evaluate the profiles of Streptococcus thermophilus nutrient requirements to guide the design of media for high cell density culturing. The growth kinetics, physiological state, and nutrient requirement profiles of S. thermophilus were analyzed in chemically defined media. The results showed that the intracellular ATP concentration, H+ -ATPase activity, NADH/NAD+ , and NH3 concentrations varied with intracellular pH. The nutrient components with the highest amounts required were Leu and Asp; ascorbic acid and p-amino benzoic acid; K+ and PO4 3- ; and guanine and uracil...
April 22, 2018: MicrobiologyOpen
https://www.readbyqxmd.com/read/29681155/remote-control-of-heterodimeric-magnetic-nanoswitch-regulates-the-adhesion-and-differentiation-of-stem-cells
#3
Heemin Kang, Hee Joon Jung, Dexter Siu Hong Wong, Sung Kyu Kim, Sien Lin, Kai Fung Chan, Li Zhang, Gang Li, Vinayak P Dravid, Liming Bian
Remote, non-invasive, and reversible control over the nanoscale presentation of bioactive ligands, such as Arg-Gly-Asp (RGD) peptide, is highly desirable for temporally regulating cellular functions in vivo. Herein, we present a novel strategy for physically uncaging RGD using a magnetic field that allows safe and deep tissue penetration. We developed a heterodimeric nanoswitch consisting of a magnetic nanocage (MNC) coupled to an underlying RGD-coated gold nanoparticle (AuNP) via a long flexible linker. Magnetically controlled movement of MNC relative to AuNP allowed reversible uncaging and caging of RGD that modulate physical accessibility of RGD for integrin binding, thereby regulating stem cell adhesion, both in vitro and in vivo...
April 22, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29680054/in-vitro-and-in-silico-studies-of-3-hydroxy-3-methyl-glutaryl-coenzyme-a-reductase-inhibitory-activity-of-the-cowpea-gln-asp-phe-peptide
#4
Mariana Barros de Cerqueira E Silva, Caio Alexandre da Cruz Souza, Biane Oliveira Philadelpho, Mariana Mota Novais da Cunha, Fabiana Pacheco Reis Batista, Jaff Ribeiro da Silva, Janice Izabel Druzian, Marcelo Santos Castilho, Eduardo Maffud Cilli, Ederlan S Ferreira
Previous studies have shown that cowpea protein positively interferes with cholesterol metabolism. In this study, we evaluated the ability of the fraction containing peptides of <3 kDa, as well as that of the Gln-Asp-Phe (QDF) peptide, derived from cowpea β-vignin protein, to inhibit HMG-CoA reductase activity. We established isolation and chromatography procedures to effectively obtain the protein with a purity above 95%. In silico predictions were performed to identify peptide sequences capable of interacting with HMG-CoA reductase...
September 1, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29679841/-1-h-line-width-dependence-on-mas-speed-in-solid-state-nmr-comparison-of-experiment-and-simulation
#5
Ulrich Sternberg, Raiker Witter, Ilya Kuprov, Jonathan M Lamley, Andres Oss, Józef R Lewandowski, Ago Samoson
Recent developments in magic angle spinning (MAS) technology permit spinning frequencies of ≥100 kHz. We examine the effect of such fast MAS rates upon nuclear magnetic resonance proton line widths in the multi-spin system of β-Asp-Ala crystal. We perform powder pattern simulations employing Fokker-Plank approach with periodic boundary conditions and 1 H-chemical shift tensors calculated using the bond polarization theory. The theoretical predictions mirror well the experimental results. Both approaches demonstrate that homogeneous broadening has a linear-quadratic dependency on the inverse of the MAS spinning frequency and that, at the faster end of the spinning frequencies, the residual spectral line broadening becomes dominated by chemical shift distributions and susceptibility effects even for crystalline systems...
April 7, 2018: Journal of Magnetic Resonance
https://www.readbyqxmd.com/read/29676852/asp-58-modulates-lens-%C3%AE-a-crystallin-oligomer-formation-and-chaperone-function
#6
Takumi Takata, Tooru Nakamura-Hirota, Rintaro Inoue, Ken Morishima, Nobuhiro Sato, Masaaki Sugiyama, Noriko Fujii
Senile cataract onset is caused by insolubilization of lens proteins. The lens crystallin protein family correctly orders the formation of homo- or hetero-oligomers in lens fiber cells. Because lens fiber cells do not divide, covalent post-translational modifications such as isomerization of aspartate residues, accumulate with aging. Although many isomerization sites of αA-crystallin have been reported, their structural and functional contributions have never been identified. In this study, αA-crystallin was extracted from the aged human lens and separated into each oligomeric state by size exclusion chromatography and electrophoresis...
April 20, 2018: FEBS Journal
https://www.readbyqxmd.com/read/29676741/diurnal-variations-of-the-energy-intensity-and-associated-greenhouse-gas-emissions-for-activated-sludge-processes
#7
Nasir Emami, Reza Sobhani, Diego Rosso
A model was developed for a water resources recovery facility (WRRF) activated sludge process (ASP) in Modified Ludzack-Ettinger (MLE) configuration. Amplification of air requirements and its associated energy consumptions were observed as a result of concurrent circadian variations in ASP influent flow and carbonaceous/nitrogenous constituent concentrations. The indirect carbon emissions associated with the ASP aeration were further amplified due to the simultaneous variations in carbon emissions intensity (kgCO2,eq (kWh)-1 ) and electricity consumption (kWh)...
April 2018: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/29676577/oxidation-of-acid-base-and-amide-side-chain-amino-acid-derivatives-via-hydroxyl-radical
#8
Jon Uranga, Jon I Mujika, Rafael Grande-Aztatzi, Jon M Matxain
Hydroxyl radical (●OH) is known to be highly reactive. Herein, we analyze the oxidation of acid (Asp and Glu), base (Arg and Lys) and amide (Asn and Gln) containing amino acids by the consecutive attack of two ●OH. In this work we study the reaction pathway by means of density functional theory. The oxidation mechanism is divided into two steps: 1) the first ●OH can abstract a H atom or an electron, leading to a radical amino acid derivative, which is the intermediate of the reaction 2) the second ●OH can abstract another H atom or add itself to the formed radical, rendering the final oxidized products...
April 20, 2018: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/29674981/comparative-effect-of-collaborative-care-pain-medication-and-duloxetine-in-the-treatment-of-major-depressive-disorder-and-comorbid-sub-chronic-pain-results-of-an-exploratory-randomized-placebo-controlled-multicenter-trial-cc-paindip
#9
Eric W de Heer, Jack Dekker, Aartjan T F Beekman, Harm W J van Marwijk, Tjalling J Holwerda, Pierre M Bet, Joost Roth, Lotte Timmerman, Christina M van der Feltz-Cornelis
Objective: Evidence exists for the efficacy of collaborative care (CC) for major depressive disorder (MDD), for the efficacy of the consequent use of pain medication against pain, and for the efficacy of duloxetine against both MDD and neuropathic pain. Their relative effectiveness in comorbid MDD and pain has never been established so far. This study explores the effectiveness of CC with pain medication and duloxetine, and CC with pain medication and placebo, compared with duloxetine alone, on depressive and pain symptoms...
2018: Frontiers in Psychiatry
https://www.readbyqxmd.com/read/29673954/oxidative-stress-in-osteoarthritis-and-antioxidant-effect-of-polysaccharide-from-angelica-sinensis
#10
Chao Zhuang, Yuji Wang, Yunkun Zhang, Nanwei Xu
This study aimed to investigate the oxidative stress in human osteoarthritis (OA) chondrocytes and the antioxidant effect of angelica sinensis polysaccharide (ASP) on it. Human OA chondrocytes and human normal chondrocytes induced by hydrogen peroxide (H2 O2 ) alone or treated with ASP were cultured, then they were measured with cell viability, levels of reactive oxygen species (ROS), nitric oxide (NO) and malondialdehyde (MDA) production, activities of inducible nitric oxide synthase (iNOS), superoxide dismutase (SOD) and catalase (CAT), expression of related genes, such as collagen type II (Col2a1), Aggrecan, iNOS, SOD, CAT and peroxisome proliferator-activated receptor gamma (PPARγ)...
April 16, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29670187/measurement-of-metabolite-variations-and-analysis-of-related-gene-expression-in-chinese-liquorice-glycyrrhiza-uralensis-plants-under-uv-b-irradiation
#11
Xiao Zhang, Xiaoli Ding, Yaxi Ji, Shouchuang Wang, Yingying Chen, Jie Luo, Yingbai Shen, Li Peng
Plants respond to UV-B irradiation (280-315 nm wavelength) via elaborate metabolic regulatory mechanisms that help them adapt to this stress. To investigate the metabolic response of the medicinal herb Chinese liquorice (Glycyrrhiza uralensis) to UV-B irradiation, we performed liquid chromatography tandem mass spectrometry (LC-MS/MS)-based metabolomic analysis, combined with analysis of differentially expressed genes in the leaves of plants exposed to UV-B irradiation at various time points. Fifty-four metabolites, primarily amino acids and flavonoids, exhibited changes in levels after the UV-B treatment...
April 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29670018/identification-of-placental-aspartic-proteinase-in-the-eurasian-beaver-castor-fiber-l
#12
Aleksandra Lipka, Grzegorz Panasiewicz, Marta Majewska, Lukasz Paukszto, Martyna Bieniek-Kobuszewska, Bozena Szafranska
Aspartic proteinases (AP) form a multigenic group widely distributed in various organisms and includes pepsins (pep), cathepsins D and E, pregnancy associated glycoproteins (PAGs) as well as plant, fungal, and retroviral proteinases. This study describes the transcript identification and expression localization of the AP within the discoid placenta of the Castor fiber . We identified 1257 bp of the AP cDNA sequence, encoding 391 amino acids (aa) of the polypeptide precursor composed of 16 aa signal peptide, 46 aa pro-piece, and 329 aa of the mature protein...
April 18, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29667205/application-of-heparin-collagen-redv-selective-active-interface-on-eptfe-films-to-enhance-endothelialization-and-anticoagulation
#13
Yaping Shan, Bing Jia, Ming Ye, Hua Shen, Weicheng Chen, Huifeng Zhang
Expanded polytetrafluoroethylene (ePTFE) prosthetic valves have been widely used in clinical applications in Asian countries. However, these valves still have limits with regard to thrombosis, neointimal hyperplasia, restenosis, and valvar vegetation. The achievement of in situ endothelialization on implant materials is a promising way to overcome those limits. Here, heparin/collagen multilayers were fabricated on ePTFE films via a layer-by-layer (LBL) self-assembly technique, and then, the endothelial cell (EC) adhesive peptide sequence Arg-Glu-Asp-Val (REDV) was immobilized on the multilayers...
April 18, 2018: Artificial Organs
https://www.readbyqxmd.com/read/29665290/timely-visualization-of-the-collaterals-formed-during-acute-ischemic-stroke-with-fe-3-o-4-nanoparticle-based-mr-imaging-probe
#14
Ting Wang, Yi Hou, Bo Bu, Wenxin Wang, Tiancong Ma, Chunyan Liu, Lan Lin, Lin Ma, Xin Lou, Mingyuan Gao
Ischemic stroke is one of the major leading causes for long-term disability and mortality. Collateral vessels provide an alternative pathway to protect the brain against ischemic injury after arterial occlusion. Aiming at visualizing the collaterals occurring during acute ischemic stroke, an integrin αv β3 -specific Fe3 O4 -Arg-Gly-Asp (RGD) nanoprobe is prepared for magnetic resonance imaging (MRI) of the collaterals. Rat models are constructed by occluding the middle cerebral artery for imaging studies of cerebral ischemia and ischemia-reperfusion on 7...
April 17, 2018: Small
https://www.readbyqxmd.com/read/29663167/structural-studies-on-radiopharmaceutical-dota-minigastrin-analogue-cp04-complexes-and-their-interaction-with-cck2-receptor
#15
Piotr F J Lipiński, Piotr Garnuszek, Michał Maurin, Raphael Stoll, Nils Metzler-Nolte, Artur Wodyński, Jan Cz Dobrowolski, Marta K Dudek, Monika Orzełowska, Renata Mikołajczak
BACKGROUND: The cholecystokinin receptor subtype 2 (CCK-2R) is an important target for diagnostic imaging and targeted radionuclide therapy (TRNT) due to its overexpression in certain cancers (e.g., medullary thyroid carcinoma (MTC)), thus matching with a theranostic principle. Several peptide conjugates suitable for the TRNT of MTC have been synthesized, including a very promising minigastrin analogue DOTA-(DGlu)6 -Ala-Tyr-Gly-Trp-Met-Asp-Phe-NH2 (CP04). In this contribution, we wanted to see whether CP04 binding affinity for CCK-2R is sensitive to the type of the complexed radiometal, as well as to get insights into the structure of CP04-CCK2R complex by molecular modeling...
April 16, 2018: EJNMMI Research
https://www.readbyqxmd.com/read/29663093/cultured-pearl-surface-quality-profiling-by-the-shell-matrix-protein-gene-expression-in-the-biomineralised-pearl-sac-tissue-of-pinctada-margaritifera
#16
Carole Blay, Serge Planes, Chin-Long Ky
Nucleated pearls are produced by molluscs of the Pinctada genus through the biomineralisation activity of the pearl sac tissue within the recipient oyster. The pearl sac originates from graft tissue taken from the donor oyster mantle and its functioning is crucial in determining key factors that impact pearl quality surface characteristics. The specific role of related gene regulation during gem biogenesis was unknown, so we analysed the expression profiles of eight genes encoding nacreous (PIF, MSI60, PERL1) or prismatic (SHEM5, PRISM, ASP, SHEM9) shell matrix proteins or both (CALC1) in the pearl sac (N = 211) of Pinctada margaritifera during pearl biogenesis...
April 16, 2018: Marine Biotechnology
https://www.readbyqxmd.com/read/29661735/fine-needle-aspiration-of-alveolar-soft-part-sarcoma-in-a-child-cytomorphological-clues-for-the-surgical-pathologist
#17
Mohamed Mostafa, Daniel Abbott, Lauren N Parsons
Alveolar soft part sarcoma (ASPS) is a rare soft tissue neoplasm generally affecting adolescents and young adults. Its unique histologic and ultrastructural features have been well-described; however, the cytopathological features of ASPS are less well-characterized, and recognition of this entity's features on cytologic preparations can ensure that the specimen adequacy and appropriate/rapid tissue allocation for additional testing. Herein we report a FNA case of ASPS with emphasis on cytomorphologic characteristics...
February 23, 2018: Annals of Diagnostic Pathology
https://www.readbyqxmd.com/read/29661029/antimicrobial-stewardship-program-in-a-greek-hospital-implementing-a-mandatory-prescription-form-and-prospective-audits
#18
Vassiliki Pitiriga, Petros Kanellopoulos, Elsa Kampos, George Panagiotakopoulos, Athanasios Tsakris, George Saroglou
AIM: Antimicrobial stewardship programs (ASPs) are urgently needed for Greek hospitals in order to improve antibiotic usage. PATIENTS & METHODS: An ASP was implemented to a Greek hospital since February 2014. A mandatory order form was introduced for five antimicrobials; colistin, tigecycline, daptomycin, doripenem and linezolid. Prospective audits allowed for feedback to the prescribers without direct prescribing restriction. RESULTS: Antimicrobials' consumption at the baseline year and the 3 years of ASP implementation was 93...
April 17, 2018: Future Microbiology
https://www.readbyqxmd.com/read/29660749/antimicrobial-peptidomimetics-for-recurrent-septicemia-infections-in-vitro-study-for-immuno-compromised-disease-target
#19
Priyanka Sharma, Kandasamy Nagarajan, Bihu Prasad Panda
The frequency of Bacillus subtilis infection such as pneumonia pan-opthalmitis, visceral abscess or musculoskeletal infection etc. complications following bacteremia, meningitis in children & the infection associated with majority of motor vehicle accidents associated with trauma & gun shoot injury. Antibiotics which appear especially useful in the treatment of Bacillus. infection are clindamycin and vancomycin to which vast majority of strains are susceptible in vitro. Our objective is to test the synthesized peptidomimetics with the efforts mainly directed towards the identification of antibacterial compounds against recurrent septicemia infection...
April 16, 2018: Drug Research
https://www.readbyqxmd.com/read/29659969/aspartame-consumption-for-12-weeks-does-not-affect-glycemia-appetite-or-body-weight-of-healthy-lean-adults-in-a-randomized-controlled-trial
#20
Kelly A Higgins, Robert V Considine, Richard D Mattes
Background: Low-calorie sweeteners are often used to moderate energy intake and postprandial glycemia, but some evidence indicates that they may exacerbate these aims. Objective: The trial's primary aim was to assess the effect of daily aspartame ingestion for 12 wk on glycemia. Effects on appetite and body weight were secondary aims. Methods: One hundred lean [body mass index (kg/m2): 18-25] adults aged 18-60 y were randomly assigned to consume 0, 350, or 1050 mg aspartame/d (ASP groups) in a beverage for 12 wk in a parallel-arm design...
April 1, 2018: Journal of Nutrition
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