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https://www.readbyqxmd.com/read/29156739/electroacupuncture-alleviates-neuromuscular-dysfunction-in-an-experimental-rat-model-of-immobilization
#1
Jun Yang, Su Min, Fei Xie, Jingyuan Chen, Xuechao Hao, Li Ren
Immobilization-related skeletal muscle atrophy is a major concern to patients in Intensive Care Units and it has a profound effect on the quality of life. However, the underlying molecular events for the therapeutic effect of electroacupuncture to treat muscle atrophy have not been fully elucidated. Here we developed an immobilization mouse model and tested the hypothesis that skeletal muscle weakness may be caused by the increased expression of γ and α7 nicotinic acetylcholine receptors (nAChRs) on muscle cell membranes, while electroacupuncture could decrease the expression of γ and α7 nicotinic acetylcholine receptors...
October 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/29156685/whole-genome-and-transcriptome-analysis-reveal-maldi-tof-ms-and-sds-page-have-limited-performance-for-the-detection-of-the-key-outer-membrane-protein-in-carbapenem-resistant-klebsiella-pneumoniae-isolates
#2
Naina Adren Pinto, Roshan D'Souza, In Sik Hwang, Jongrak Choi, Yong Ha In, Hyung Soon Park, Choong-Min Ryu, Dongeun Yong, Kyungwon Lee
To detect the outer membrane protein (OMP), which plays a key role in carbapenem resistance, whole-genome and transcriptome analysis of the clinical carbapenem-resistant Klebsiella pneumoniae was carried out. The index strain lacked both OmpK35 and OmpK36, whereas the other strains lacked only OmpK35. After SDS-PAGE, the putative OMP bands were excised and identified as OmpA and OmpK36. MALDI-TOF MS showed peaks at ∼36 and ∼38 kDa that corresponded to OmpA and OmpK36, respectively. In all the strains except YMC2014/03/P345, the ∼38 kDa peaks were present...
October 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/29156678/epigenetic-silencing-of-tumor-suppressor-candidate-3-confers-adverse-prognosis-in-early-colorectal-cancer
#3
Elke Burgermeister, Patrick Höde, Johannes Betge, Tobias Gutting, Andreas Merkel, Wen Wu, Marc Tänzer, Maximilian Mossner, Daniel Nowak, Julia Magdeburg, Felix Rückert, Carsten Sticht, Katja Breitkopf-Heinlein, Nadine Schulte, Nicolai Härtel, Sebastian Belle, Stefan Post, Timo Gaiser, Barbara Ingold Heppner, Hans-Michael Behrens, Christoph Röcken, Matthias P A Ebert
Colorectal cancer (CRC) is a biologically and clinically heterogeneous disease. Even though many recurrent genomic alterations have been identified that may characterize distinct subgroups, their biological impact and clinical significance as prognostic indicators remain to be defined. The tumor suppressor candidate-3 (TUSC3/N33) locates to a genomic region frequently deleted or silenced in cancers. TUSC3 is a subunit of the oligosaccharyltransferase (OST) complex at the endoplasmic reticulum (ER) which catalyzes bulk N-glycosylation of membrane and secretory proteins...
October 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/29156646/inhibition-of-bcl-2-and-cox-2-protein-expression-after-local-application-of-a-new-carmustine-loaded-clinoptilolite-based-delivery-system-in-a-chemically-induced-skin-cancer-model-in-mice
#4
Cristina Mihaela Ghiciuc, Aurel Lulu Strat, Lacramioara Ochiuz, Catalina Elena Lupusoru, Maria Ignat, Aurelia Vasile, Alexandru Grigorovici, Iulian Stoleriu, Carmen Solcan
Our research has focused on in vitro and in vivo evaluations of a new Carmustine (BCNU)-loaded clinoptilolite-based delivery system. Two clinoptilolite ionic forms-hydrogen form (HCLI) and sodium form (NaCLI)-were prepared, allowing a loading degree of about 5-6 mg BCNU/g of zeolite matrix due to the dual porous feature of clinoptilolite. Clinoptilolite-based delivery systems released 35.23% of the load in 12 h for the BCNU@HCLI system and only 10.82% for the BCNU@NaCLI system. The BCNU@HCLI system was chosen to develop gel and cream semisolid dosage forms...
November 20, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29156622/advanced-glycation-end-products-in-the-pathogenesis-of-psoriasis
#5
REVIEW
Anastasia Papagrigoraki, Martina Maurelli, Micol Del Giglio, Paolo Gisondi, Giampiero Girolomoni
Advanced glycation end products (AGEs) are extremely oxidant and biologically reactive compounds, which form through oxidation of sugars, lipids and amino acids to create aldehydes that bind covalently to proteins. AGEs formation and accumulation in human tissues is a physiological process during ageing but it is enhanced in case of persistent hyperglycemia, hyperlipidemia and oxidative or carbonyl stress, which are common in patients with moderate to severe psoriasis. Exogenous AGEs may derive from foods, UV irradiation and cigarette smoking...
November 20, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29156586/in-depth-glyco-peptidomics-approach-reveals-unexpected-diversity-of-glycosylated-peptides-and-atypical-post-translational-modifications-in-dendroaspis-angusticeps-snake-venom
#6
Michel Degueldre, Julien Echterbille, Nicolas Smargiasso, Christian Damblon, Charlotte Gouin, Gilles Mourier, Nicolas Gilles, Edwin De Pauw, Loïc Quinton
Animal venoms represent a valuable source of bioactive peptides that can be derived into useful pharmacological tools, or even innovative drugs. In this way, the venom of Dendroaspis angusticeps (DA), the Eastern Green Mamba, has been intensively studied during recent years. It mainly contains hundreds of large toxins from 6 to 9 kDa, each displaying several disulfide bridges. These toxins are the main target of venom-based studies due to their valuable activities obtained by selectively targeting membrane receptors, such as ion channels or G-protein coupled receptors...
November 18, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29156584/identification-of-physiological-substrates-and-binding-partners-of-the-plant-mitochondrial-protease-ftsh4-by-the-trapping-approach
#7
Magdalena Opalińska, Katarzyna Parys, Hanna Jańska
Maintenance of functional mitochondria is vital for optimal cell performance and survival. This is accomplished by distinct mechanisms, of which preservation of mitochondrial protein homeostasis fulfills a pivotal role. In plants, inner membrane-embedded i-AAA protease, FTSH4, contributes to the mitochondrial proteome surveillance. Owing to the limited knowledge of FTSH4's in vivo substrates, very little is known about the pathways and mechanisms directly controlled by this protease. Here, we applied substrate trapping coupled with mass spectrometry-based peptide identification in order to extend the list of FTSH4's physiological substrates and interaction partners...
November 18, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29156374/genetic-profiling-and-surface-proteome-analysis-of-human-atrial-stromal-cells-and-rat-ventricular-epicardium-derived-cells-reveals-novel-insights-into-their-cardiogenic-potential
#8
Sebastian Temme, Daniela Friebe, Timo Schmidt, Gereon Poschmann, Julia Hesse, Bodo Steckel, Kai Stühler, Meik Kunz, Thomas Dandekar, Zhaoping Ding, Payam Akhyari, Artur Lichtenberg, Jürgen Schrader
Epicardium-derived cells (EPDC) and atrial stromal cells (ASC) display cardio-regenerative potential, but the molecular details are still unexplored. Signals which induce activation, migration and differentiation of these cells are largely unknown. Here we have isolated rat ventricular EPDC and rat/human ASC and performed genetic and proteomic profiling. EPDC and ASC expressed epicardial/mesenchymal markers (WT-1, Tbx18, CD73, CD90, CD44, CD105), cardiac markers (Gata4, Tbx5, troponin T) and also contained phosphocreatine...
November 7, 2017: Stem Cell Research
https://www.readbyqxmd.com/read/29156213/hocl-and-the-control-of-oncogenesis
#9
REVIEW
Georg Bauer
Sustained generation of extracellular superoxide anions by membrane-associated NADPH oxidase-1 is a hallmark of malignant transformation. The resulting H2O2 drives the proliferation of malignant cells and is converted to HOCl by a Dual oxidase-related peroxidase domain that acts analogously to myeloperoxidase. Whereas H2O2 induces apoptosis nonselectively in nontransformed and transformed cells, HOCl selectively affects malignant cells, as the interaction between HOCl and extracellular superoxide anions allows for site-specific generation of apoptosis-inducing hydroxyl radicals...
November 10, 2017: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/29156125/validating-coarse-grained-voltage-activation-model-by-comparing-the-performance-to-the-results-of-mc-simulations
#10
Myungjin Lee, Vesselin Kolev, Arieh Warshel
Simulating the nature of voltage activated systems is a problem of major current interest, covering the action of voltage gated ion channels to energy storage batteries. However, fully microscopic converging molecular simulations of external voltage effects present a major challenge and macroscopic models are associated with major uncertainties about the dielectric treatment and the underlying physical basis. Recently we developed a coarse grained (CG) model that represents explicit the electrodes, the electrolytes and the membrane / protein system...
November 20, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/29155846/soluble-cd40-ligand-directly-alters-glomerular-permeability-and-may-act-as-a-circulating-permeability-factor-in-fsgs
#11
Sophie Doublier, Cristina Zennaro, Luca Musante, Tiziana Spatola, Giovanni Candiano, Maurizio Bruschi, Luca Besso, Massimo Cedrino, Michele Carraro, Gian Marco Ghiggeri, Giovanni Camussi, Enrico Lupia
CD40/CD40 ligand (CD40L) dyad, a co-stimulatory bi-molecular complex involved in the adaptive immune response, has also potent pro-inflammatory actions in haematopoietic and non-haematopoietic cells. We describe here a novel role for soluble CD40L (sCD40L) as modifier of glomerular permselectivity directly acting on glomerular epithelial cells (GECs). We found that stimulation of CD40, constitutively expressed on GEC cell membrane, by the sCD40L rapidly induced redistribution and loss of nephrin in GECs, and increased albumin permeability in isolated rat glomeruli...
2017: PloS One
https://www.readbyqxmd.com/read/29155787/synthesis-of-core-shell-lanthanide-doped-upconversion-nanocrystals-for-cellular-applications
#12
Xiangzhao Ai, Linna Lyu, Jing Mu, Ming Hu, Zhimin Wang, Bengang Xing
Lanthanide-doped upconversion nanocrystals (UCNs) have attracted much attention in recent years based on their promising and controllable optical properties, which allow for the absorption of near-infrared (NIR) light and can subsequently convert it into multiplexed emissions that span over a broad range of regions from the UV to the visible to the NIR. This article presents detailed experimental procedures for high-temperature co-precipitation synthesis of core-shell UCNs that incorporate different lanthanide ions into nanocrystals for efficiently converting deep-tissue penetrable NIR excitation (808 nm) into a strong blue emission at 480 nm...
November 10, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29155784/correlative-super-resolution-and-electron-microscopy-to-resolve-protein-localization-in-zebrafish-retina
#13
José M Mateos, Gery Barmettler, Jana Doehner, Irene Ojeda Naharros, Bruno Guhl, Stephan C F Neuhauss, Andres Kaech, Ruxandra Bachmann-Gagescu, Urs Ziegler
We present a method to investigate the subcellular protein localization in the larval zebrafish retina by combining super-resolution light microscopy and scanning electron microscopy. The sub-diffraction limit resolution capabilities of super-resolution light microscopes allow improving the accuracy of the correlated data. Briefly, 110 nanometer thick cryo-sections are transferred to a silicon wafer and, after immunofluorescence staining, are imaged by super-resolution light microscopy. Subsequently, the sections are preserved in methylcellulose and platinum shadowed prior to imaging in a scanning electron microscope (SEM)...
November 10, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29155750/ground-state-depletion-super-resolution-imaging-in-mammalian-cells
#14
Rose E Dixon, Oscar Vivas, Karen I Hannigan, Eamonn J Dickson
Advances in fluorescent microscopy and cell biology are intimately correlated, with the enhanced ability to visualize cellular events often leading to dramatic leaps in our understanding of how cells function. The development and availability of super-resolution microscopy has considerably extended the limits of optical resolution from ~250-20 nm. Biologists are no longer limited to describing molecular interactions in terms of colocalization within a diffraction limited area, rather it is now possible to visualize the dynamic interactions of individual molecules...
November 5, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29155707/optimized-lc-ms-ms-method-for-the-high-throughput-analysis-of-clinical-samples-of-ivacaftor-its-major-metabolites-and-lumacaftor-in-biological-fluids-of-cystic-fibrosis-patients
#15
Elena K Schneider, Felisa Reyes-Ortega, Jian Li, Tony Velkov
Defects in the cystic fibrosis trans-membrane conductance regulator (CFTR) are the cause of cystic fibrosis (CF), a disease with life-threatening pulmonary manifestations. Ivacaftor (IVA) and ivacaftor-lumacaftor (LUMA) combination are two new breakthrough CF drugs that directly modulate the activity and trafficking of the defective CFTR-protein. However, there is still a dearth of understanding on pharmacokinetic/pharmacodynamic parameters and the pharmacology of ivacaftor and lumacaftor. The HPLC-MS technique for the simultaneous analysis of the concentrations of ivacaftor, hydroxymethyl-ivacaftor, ivacaftor-carboxylate, and lumacaftor in biological fluids in patients receiving standard ivacaftor or ivacaftor-lumacaftor combination therapy has previously been developed by our group and partially validated to FDA standards...
October 15, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29155578/determination-of-hydrophobic-lengths-of-membrane-proteins-with-the-hdgb-implicit-membrane-model
#16
Bercem Dutagaci, Michael Feig
A protocol for predicting the hydrophobic length of membrane proteins using the heterogeneous dielectric generalized Born (HDGB) implicit membrane model is presented. The method involves optimal positioning in the membrane, identification of lipid-facing and inward-facing residues, followed by energy optimization of the implicit membrane model to obtain the hydrophobic length from the optimal membrane width. The latest HDGB version 3 (HDGBv3) and HDGB van der Waals (HDGBvdW) models were applied to a test set containing 15 proteins (seven β-barrel and eight α-helical proteins), for which matching membrane widths are available from experiment, and an additional set contains ten α-helical and ten β-barrel proteins without any experimental data...
November 20, 2017: Journal of Chemical Information and Modeling
https://www.readbyqxmd.com/read/29155576/chronic-arsenic-exposure-increases-a%C3%AE-1-42-production-and-rage-expression-in-rat-brain
#17
Sandra Aurora Niño, Guadalupe Martel-Gallegos, Adriana Castro-Zavala, Benita Ortega-Berlanga, Juan Manuel Delgado, Hector Hernandez-Mendoza, E Romero-Guzman, Judith Rios-Lugo, Sergio Rosales-Mendoza, María Esther Jiménez-Capdeville, Sergio Zarazua
Chronic arsenic exposure during development is associated with alterations of chemical transmission and demyelination, which result in cognitive deficits and peripheral neuropathies. At cellular level, arsenic toxicity involves increased generation of reactive species that induce severe cellular alterations such as DNA fragmentation, apoptosis and lipid peroxidation. It has been proposed that arsenic-associated neurodegeneration could evolve to Alzheimer disease in later life.1,2 In this study, the effects of chronic exposure to inorganic arsenic (3 ppm by drinking water) in Wistar rats on the production and elimination of Amyloid-β (Aβ) were evaluated...
November 20, 2017: Chemical Research in Toxicology
https://www.readbyqxmd.com/read/29155517/expression-of-cd40-cd40l-in-colon-cancer-and-its-effect-on-proliferation-and-apoptosis-of-sw48-colon-cancer-cells
#18
Xueqin Pang, Lifeng Zhang, Jiaming Wu, Chen Ma, Chuanyong Mu, Guangbo Zhang, Weichang Chen
PURPOSE: To study was to study the expression of CD40/CD40L in colon cancer and investigate the effects of CD40/CD40L overexpression on the proliferation and apoptosis of SW48 colon cancer cell line. METHODS: Immunohistochemistry was used to detect the expression of CD40 protein in colon cancer tissue samples from 70 patients, and 10 adjacent normal tissue samples. A CD40L gene-containing plasmid was transfected into SW48 colon cancer cells using lipofectamine 2000...
July 2017: Journal of B.U.ON.: Official Journal of the Balkan Union of Oncology
https://www.readbyqxmd.com/read/29155505/phistc-protein-family-members-localize-to-different-sub-cellular-organelles-and-bind-plasmodium-falciparum-major-virulence-factor-pfemp-1
#19
Vikash Kumar, Jasweer Kaur, Amrit Pal Singh, Vineeta Singh, Anjali Bisht, Jiban Jyoti Panda, Prakash Chandra Mishra, Rachna Hora
Plasmodium falciparum (Pf) encodes a novel repertoire of exported protein family called as Plasmodium helical interspersed sub-telomeric (PHIST) that plays diverse roles in infected red blood cells (iRBCs), contributing to malaria pathogenesis. PHIST proteins are central to parasite biology, and modify human erythrocytes by executing interactions with parasite and host proteins. Here, we have attempted to understand the localization and function of two unexplored proteins of PHISTc sub-family 'PFD1140w and PF11_0503', and compared our findings with a well characterized member 'PFI1780w'...
November 20, 2017: FEBS Journal
https://www.readbyqxmd.com/read/29155458/localization-of-surfactant-protein-d-in-the-rheumatoid-synovial-membrane
#20
Anne Friesgaard Christensen, Grith Lykke Sorensen, Kirsten Junker, Peter Hvidbak Revald, Claus Varnum, Flemming Brandt Sorensen, Peter Junker
Surfactant protein-D (SP-D) is a collectin, which plays an important role in airway protection and inflammation. The molecule has both pro- and anti-inflammatory capacities depending on its molecular size. Its involvement in joint diseases is largely unknown and the aim of this investigation was to study SP-D occurrence and distribution in the synovial membrane of patients with long-standing rheumatoid arthritis (RA) and osteoarthritis (OA). Six RA patients and six OA patients, who underwent total hip arthroplasty, were included in the study...
November 20, 2017: APMIS: Acta Pathologica, Microbiologica, et Immunologica Scandinavica
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