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Phosphoethanolamine

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https://www.readbyqxmd.com/read/28636818/critical-temperature-of-1-palmitoyl-2-oleoyl-sn-glycero-3-phosphoethanolamine-monolayers-and-its-possible-biological-relevance
#1
Jordi Hernandez Borrell, Oscar Domenech
Since transmembrane proteins (TMPs) can be obtained with sufficient purity for x-ray diffraction studies more frequently than decades ago, their mechanisms of action may now be elucidated. One of the pending issues is the actual interplay between transmembrane proteins and membrane lipids. There is strong evidence of the involvement of specific lipids with some membrane proteins, such as the potassium crystallographically sited activation channel (KcsA) of Streptomyces lividans and the secondary transporter of lactose LacY of Escherichia coli, the activities of which are associated with the presence of anionic phospholipids such as the phosphatidylglycerol (PG) and phosphatidyethanolamine (PE), respectively...
June 21, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28615941/development-and-optimization-of-an-injectable-formulation-of-copper-diethyldithiocarbamate-an-active-anticancer-agent
#2
Mohamed Wehbe, Malathi Anantha, Minghan Shi, Ada Wai-Yin Leung, Wieslawa H Dragowska, Léon Sanche, Marcel B Bally
Copper diethyldithiocarbamate (Cu(DDC)2) is the active anticancer agent generated when disulfiram (DSF) is provided in the presence of copper. To date, research directed toward repurposing DSF as an anticancer drug has focused on administration of DSF and copper in combination, efforts that have proven unsuccessful in clinical trials. This is likely due to the inability to form Cu(DDC)2 at relevant concentrations in regions of tumor growth. Little effort has been directed toward the development of Cu(DDC)2 because of the inherent aqueous insolubility of the complex...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28591608/ceramide-c16-is-a-versatile-modulator-of-phosphatidylethanolamine-polymorphism
#3
Mahmoudreza Doroudgar, Michel Lafleur
Ceramide-C16 (CerC16) is a sphingolipid associated with several diseases like diabetes, obesity, Parkinson disease, and certain types of cancers. As a consequence, research efforts are devoted to identify the impact of CerC16 on the behavior of membranes, and to understand how it is involved in these diseases. In this work, we investigated the impacts of CerC16 (up to 20 mol %) on the lipid polymorphism of 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphoethanolamine (POPE), using differential scanning calorimetry, and sequential (2)H and (31)P solid-state nuclear magnetic resonance spectroscopy...
June 6, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/28588048/the-sphingosine-1-phosphate-break-down-product-2e-hexadecenal-forms-protein-adducts-and-glutathione-conjugates-in-vitro
#4
Fabian Schumacher, Corinna Neuber, Hannah Finke, Kai Nieschalke, Jessica Baesler, Erich Gulbins, Burkhard Kleuser
Sphingosine 1-phosphate (S1P), a bioactive lipid involved in various physiological processes such as cell proliferation and apoptosis, can be irreversibly cleaved by the S1P lyase, yielding phosphoethanolamine and (2E)-hexadecenal (2EHD). The latter metabolite, an α,β-unsaturated fatty aldehyde, may be susceptible to nucleophilic attack by cellular biomolecules. Hence, we studied whether 2EHD forms reaction products with glutathione (GSH) and proteins in vitro Using liquid chromatography-tandem mass spectrometry (LC-MS/MS) and stable isotopically labeled reference material, we identified a total of nine novel reaction products of 2EHD in a cell-free approach: two GSH conjugates and seven L-amino acid adducts...
June 6, 2017: Journal of Lipid Research
https://www.readbyqxmd.com/read/28587463/lipidomic-profiling-of-human-adipose-tissue-identifies-a-pattern-of-lipids-associated-with-fish-oil-supplementation
#5
Elizabeth G Stanley, Benjamin J Jenkins, Celia G Walker, Albert Koulman, Annette L West, Philip C Calder, Susan A Jebb, Julian Leether Griffin
To understand the interaction between diet and health, biomarkers that accurately reflect consumption of foods of perceived health relevance are needed. The aim of this investigation was to use direct infusion-mass spectrometry (DI-MS) lipidomics to determine the effects of fish oil supplementation on lipid profiles of human adipose tissue. Adipose tissue samples from an n-3 polyunsaturated fatty acid (PUFA) supplementation study (n = 66) were analysed to compare the pattern following supplementation equivalent to 0 or 4 portions of oily fish per week...
June 6, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/28585804/membrane-interactions-of-hiapp-monomer-and-oligomer-with-lipid-membranes-by-molecular-dynamics-simulations
#6
Mingzhen Zhang, Baiping Ren, Yonglan Liu, Guizhao Liang, Yan Sun, Lijian Xu, Jie Zheng
Interaction of human islet amyloid polypeptide (hIAPP) peptides with cell membrane is crucial for the understanding of amyloid toxicity associated with Type II diabetes (T2D). While it is known that the hIAPP-membrane interactions are considered to promote hIAPP aggregation into fibrils and induce membrane disruption, the membrane-induced conformation, orientation, aggregation, and adsorption behaviors of hIAPP peptides have not been well understood at atomic level. Herein, we perform all-atom explicit-water molecular dynamics (MD) simulations to study the adsorption, orientation, and surface interaction of hIAPP aggregates with different sizes (monomer to tetramer) and conformations (monomer with α-helix and tetramer with β-sheet-rich U-turn) upon adsorption on the lipid bilayers composed of both pure zwitterionic POPC (1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine) and mixed anionic POPC/POPE (1-palmitoyl-2-oleoyl-sn-glycero-3-phosphoethanolamine) (3:1) lipids...
June 6, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/28583636/metabolic-profile-of-liver-damage-in-non-cirrhotic-virus-c-and-autoimmune-hepatitis-a-proton-decoupled-31-p-mrs-study
#7
Antti Hakkarainen, Lauri Puustinen, Reetta Kivisaari, Sonja Boyd, Urpo Nieminen, Perttu Arkkila, Nina Lundbom
PURPOSE: To study liver (31)P MRS, histology, transient elastography, and liver function tests in patients with virus C hepatitis (HCV) or autoimmune hepatitis (AIH) to test the hypothesis that (31)P MR metabolic profile of these diseases differ. MATERIALS AND METHODS: 25 patients with HCV (n=12) or AIH (n=13) underwent proton decoupled (31)P MRS spectroscopy performed on a 3.0T MR imager. Intensities of phosphomonoesters (PME) of phosphoethanolamine (PE) and phosphocholine (PC), phosphodiesters (PDE) of glycerophosphoethanolamine (GPE) and glycerophosphocholine (GPC), and γ, α and β resonances of adenosine triphosphate (ATP), and nicotinamide adenine dinucleotide phosphate (NADPH) were determined...
May 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28566741/endometriosis-foci-differentiation-by-rapid-lipid-profiling-using-tissue-spray-ionization-and-high-resolution-mass-spectrometry
#8
Vitaliy V Chagovets, Zhihao Wang, Alexey S Kononikhin, Natalia L Starodubtseva, Anna Borisova, Dinara Salimova, Igor A Popov, Andrey V Kozachenko, Konstantin Chingin, Huanwen Chen, Vladimir E Frankevich, Leila V Adamyan, Gennady T Sukhikh
Obtaining fast screening information on molecular composition of a tissue sample is of great importance for a disease biomarkers search and for online surgery control. In this study, high resolution mass spectrometry analysis of eutopic and ectopic endometrium tissues (90 samples) is done using direct tissue spray mass spectrometry in both positive and negative ion modes. The most abundant peaks in the both ion modes are those corresponding to lipids. Species of three lipid classes are observed, phosphatidylcholines (PC), sphingomyelins (SM) and phosphoethanolamines (PE)...
May 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28553112/ionp-doped-nanoparticles-for-highly-effective-nir-controlled-drug-release-and-combination-tumor-therapy
#9
Xudong Fu, Xinjun Wang, Shaolong Zhou, Yanyan Zhang
Despite advances in controlled drug delivery, drug delivery systems (DDSs) with controlled activated drug release and high spatial and temporal resolution are still required. Theranostic nanomedicine is capable of diagnosis, therapy, and monitoring the delivery and distribution of drug molecules and has received growing interest. In this study, a near-infrared light-controlled "off-on" DDS with magnetic resonance imaging and magnetic targeting properties was developed using a hybrid nanoplatform (carbon nanotubes [CNTs]-iron oxide nanoparticle)...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28544208/ultra-high-field-magnetic-resonance-spectroscopy-in-non-alcoholic-fatty-liver-disease-novel-mechanistic-and-diagnostic-insights-of-energy-metabolism-in-non-alcoholic-steatohepatitis-and-advanced-fibrosis
#10
Stefan Traussnigg, Christian Kienbacher, Martin Gajdošík, Ladislav Valkovič, Emina Halilbasic, Judith Stift, Christian Rechling, Harald Hofer, Petra Steindl-Munda, Peter Ferenci, Fritz Wrba, Siegfried Trattnig, Martin Krššák, Michael Trauner
BACKGROUND & AIMS: With the rising prevalence of non-alcoholic fatty liver disease (NAFLD) and steatohepatitis (NASH) non-invasive tools obtaining pathomechanistic insights to improve risk stratification are urgently needed. We therefore explored high- and ultra-high-field magnetic resonance spectroscopy (MRS) to obtain novel mechanistic and diagnostic insights into alterations of hepatic lipid, cell membrane and energy metabolism across the spectrum of NAFLD. METHODS: MRS and liver biopsy were performed in 30 NAFLD patients with NAFL (n=8) or NASH (n=22)...
April 24, 2017: Liver International: Official Journal of the International Association for the Study of the Liver
https://www.readbyqxmd.com/read/28513140/hybrid-prodrug-nanoparticles-with-tumor-penetration-and-programmed-drug-activation-for-enhanced-chemoresistant-cancer-therapy
#11
Caiyan Zhao, Leihou Shao, Jianqing Lu, Xiongwei Deng, Yujia Tong, Yan Wu
Despite nanomedicine having shown great potential for reversing cancer cell resistance, the suboptimal transport across multiple biological obstacles seriously impedes its reaching targets at an efficacious level, which remains a challenging hurdle for clinical success in resistant cancer therapy. Here, a lipid-based hybrid nanoparticle was designed to efficiently deliver the therapeutics to resistant cells and treat resistant cancer in vivo. The hybrid nanoparticles (D-NPs/tetrandrine (TET)) are composed of a pH-responsive prodrug 1,2-distearoyl-sn-glycero-3-phosphoethanolamine (DSPE)-doxorubicin (DOX), an efflux inhibitor TET, and a surfactant DSPE-[methoxy (poly(ethylene glycol))-2000] (DSPE-mPEG2000), which hierarchically combatted the sequential physiological and pathological barriers of drug resistance and exhibited prolonged blood circulation, high tumor accumulation, and deep tumor parenchyma penetration...
June 7, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28487815/phospholipid-arrays-on-porous-polymer-coatings-generated-by-micro-contact-spotting
#12
Sylwia Sekula-Neuner, Monica de Freitas, Lea-Marie Tröster, Tobias Jochum, Pavel A Levkin, Michael Hirtz, Harald Fuchs
Nanoporous poly(2-hydroxyethyl methacrylate-co-ethylene dimethacrylate) (HEMA-EDMA) is used as a 3D mesh for spotting lipid arrays. Its porous structure is an ideal matrix for lipid ink to infiltrate, resulting in higher fluorescent signal intensity as compared to similar arrays on strictly 2D substrates like glass. The embedded lipid arrays show high stability against washing steps, while still being accessible for protein and antibody binding. To characterize binding to polymer-embedded lipids we have applied Streptavidin as well as biologically important biotinylated androgen receptor binding onto 1,2-dipalmitoyl-sn-glycero-3-phosphoethanolamine-N-(cap biotinyl) (Biotinyl Cap PE) and anti-DNP IgE recognition of 2,4-dinitrophenyl[1,2-dipalmitoyl-sn-glycero-3-phosphoethanolamine-N-[6-[(2,4-dinitrophenyl)amino]hexanoyl] (DNP)] antigen...
2017: Beilstein Journal of Nanotechnology
https://www.readbyqxmd.com/read/28487432/deciphering-mcr-2-colistin-resistance
#13
Jian Sun, Yongchang Xu, Rongsui Gao, Jingxia Lin, Wenhui Wei, Swaminath Srinivas, Defeng Li, Run-Shi Yang, Xing-Ping Li, Xiao-Ping Liao, Ya-Hong Liu, Youjun Feng
Antibiotic resistance is a prevalent problem in public health worldwide. In general, the carbapenem β-lactam antibiotics are considered a final resort against lethal infections by multidrug-resistant bacteria. Colistin is a cationic polypeptide antibiotic and acts as the last line of defense for treatment of carbapenem-resistant bacteria. Very recently, a new plasmid-borne colistin resistance gene, mcr-2, was revealed soon after the discovery of the paradigm gene mcr-1, which has disseminated globally. However, the molecular mechanisms for MCR-2 colistin resistance are poorly understood...
May 9, 2017: MBio
https://www.readbyqxmd.com/read/28483522/characterization-of-phosphoethanolamine-n-methyltransferases-in-green-algae
#14
Takashi Hirashima, Masakazu Toyoshima, Takashi Moriyama, Yuki Nakamura, Naoki Sato
Phosphatidylcholine (PtdCho) is a common and abundant phospholipid in most eukaryotic organisms. Although it has been known that the model green alga Chlamydomonas reinhardtii lacks PtdCho, we recently detected PtdCho in four Chlamydomonas species. Homology search of draft genomic sequences of the four PtdCho-containing algae suggested existence of phosphoethanolamine-N-methyltransferase (PEAMT) in C. applanata and C. asymmetrica, which is the key enzyme in PtdCho biosynthesis in land plants. Here we analyzed the putative genes encoding PEAMT in C...
June 17, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28472749/neutral-pegylated-liposomal-formulation-for-efficient-folate-mediated-delivery-of-mcl1-sirna-to-activated-macrophages
#15
Eugénia Nogueira, Jaime Freitas, Ana Loureiro, Patrícia Nogueira, Andreia C Gomes, Ana Preto, Alexandre M Carmo, Alexandra Moreira, Artur Cavaco-Paulo
Cationic liposomes are efficient vectors for systemic delivery of therapeutic small interfering RNA (siRNA), taking advantage of RNA interference (RNAi), a naturally occurring gene-silencing mechanism in mammalian cells. However, toxicity at high concentrations, short circulating half-lives and lack of specificity restrict their successful application in a wider scale. The purpose of this study was to evaluate the efficiency of neutral liposomes containing polyethylene glycol (PEG) to encapsulate siRNA in their aqueous core...
April 13, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28466946/giant-vesicles-from-rehydrated-crude-mixtures-containing-unexpected-mixtures-of-amphiphiles-formed-under-plausibly-prebiotic-conditions
#16
Michele Fiore, Warren Madanamoothoo, Alexandra Berlioz-Barbier, Ofelia Maniti, Agnès Girard-Egrot, René Buchet, Peter Strazewski
Giant lipid vesicles resemble compartments of biological cells, mimicking them in their dimension, membrane structure and partly in their membrane composition. The spontanenous appearance of closed membranes composed of bilayers of self-assembling amphiphiles was likely a prerequisite for Darwinian competitive behavior to set in at the molecular level. Such compartments should be dynamic in their membrane composition (evolvable), and sufficiently stable to harbor macromolecules (leak-free), yet semi-permeable for reactive small molecules to get across the membrane (stay away from chemical equilibrium)...
May 16, 2017: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/28448961/supported-binary-liposome-vesicle-gold-nanoparticle-for-enhanced-label-free-dna-and-protein-sensing
#17
Karutha Pandian Divya, Venkataraman Dharuman
Supported binary liposome mixture of cationic liposome N-[1-(2,3-Dioleoyloxy)propyl]-N,N,N-trimethylammonium propane (DOTAP) and the zwitterionic liposome 1,2-Dioleoyl-sn-Glycero-3-Phosphoethanolamine (DOPE) were tethered on thiol monolayers in the absence and presence of gold nanoparticle to enhance sensor stability and sensitivity for label free DNA and protein sensing for the first time. Cysteamine hydrochloride (Cyst), 3-Mercaptopropionic acid (MPA), 11-Mercaptoundecanoic acid (MUDA) and 11-amino-1-undecane thiol (AUT) monolayers were used as tethers on gold surfaces...
September 15, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28444771/oestrone-targeted-liposomes-for-mitoxantrone-delivery-via-oestrogen-receptor-synthesis-physicochemical-characterization-and-in-vitro-evaluation
#18
Qiang Hao, Guoxing Xu, Yue Yang, Yuxin Sun, Dengli Cong, Hongrui Li, Xin Liu, Zeng Wang, Zheng Zhang, Jinglin Chen, Yao Li, Xue Luan, Lin Wang, Lin Tian, Kun Liu, Yan Li, Qianru Jiao, Jin Pei
OBJECTIVES: Targeted delivery of mitoxantrone (MTO, an anthraquinone drug with high antitumour effect) may be achieved using a novel nanoparticulate delivery system via binding the oestrogen receptor (ER, highly expressed in a variety of human tumours). METHODS: A novel liposomal nanoparticle (NP) was developed using a conjugate derived from 1, 2-distearoyl-sn-glycero-3-phosphoethanolamine-N-[amino (polyethylene glycol)-2000] (DSPE-PEG2000 -NH2 ) and oestrone (ES, is known to bind the ER) to produce an ES-targeted PEGylated liposome (ES-SSL)...
April 26, 2017: Journal of Pharmacy and Pharmacology
https://www.readbyqxmd.com/read/28439746/plasma-phosphatidylethanolamine-and-triacylglycerol-fatty-acid-concentrations-are-altered-in-major-depressive-disorder-patients-with-seasonal-pattern
#19
Yurika Otoki, Marie Hennebelle, Anthony J Levitt, Kiyotaka Nakagawa, Walter Swardfager, Ameer Y Taha
Disturbances in peripheral and brain lipid metabolism, including the omega-3 fatty acid docosahexaenoic acid (DHA), have been reported in major depressive disorder (MDD). However, these changes have yet to be confirmed in MDD with seasonal pattern (MDD-s), a subtype of recurrent MDD. The present exploratory study quantified plasma plasmalogen and diacyl-phospholipid species, and fatty acids within total phospholipids, cholesteryl esters, triacylglycerols and free fatty acids in non-medicated MDD-s participants (n = 9) during euthymia in summer or fall, and during depression in winter in order to screen for potential high sensitivity lipid biomarkers...
April 24, 2017: Lipids
https://www.readbyqxmd.com/read/28435770/thermally-activated-delayed-fluorescence-organic-dots-tadf-odots-for-time-resolved-and-confocal-fluorescence-imaging-in-living-cells-and-in-vivo
#20
Tingting Li, Dongliang Yang, Liuqing Zhai, Suiliang Wang, Baomin Zhao, Nina Fu, Lianhui Wang, Youtian Tao, Wei Huang
The fluorophores with long-lived fluorescent emission are highly desirable for time-resolved fluorescence imaging (TRFI) in monitoring target fluorescence. By embedding the aggregates of a thermally activated delayed fluorescence (TADF) dye, 2,3,5,6-tetracarbazole-4-cyano-pyridine (CPy), in distearoyl-sn-glycero-3-phosphoethanolamine-poly(ethylene glycol) (DSPE-PEG2000) matrix, CPy-based organic dots (CPy-Odots) with a long fluorescence lifetime of 9.3 μs (in water at ambient condition) and high brightness (with an absolute fluorescence quantum efficiency of 38...
April 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
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