Abstract：
:Enkephalins are pentapeptides found in the human nervous system, where they are involved in the relief of pain. The interaction of these neuropeptides with the nerve cell membranes would be a key-step in the receptor binding. We have used both Fourier-transform infrared and solid-state NMR spectroscopies to shed light on the interactions responsible for the association of enkephalins with negatively charged membranes. More specifically, we have investigated the interaction of methionine-enkephalin (Menk) with DMPG and DMPS vesicles. Our results suggest that Menk interacts electrostatically with both model membranes via its terminal NH3+ group. However, the peptide induced the formation of elongated DMPG vesicles in the magnetic field. On the other hand, the association of Menk with DMPS bilayers was concentration-dependent and disrupted the membrane at high peptide concentrations. The different effect of methionine-enkephalin with the two types of anionic membranes is most likely related to the different fluidity of these systems.
journal_name
Chem Phys Lipidsjournal_title
Chemistry and physics of lipidsauthors
Marcotte I,Ouellet M,Auger Mdoi
10.1016/j.chemphyslip.2003.10.012subject
Has Abstractpub_date
2004-02-01 00:00:00pages
175-87issue
2eissn
0009-3084issn
1873-2941pii
S0009308403001658journal_volume
127pub_type
杂志文章abstract：:We constructed a chronic oxidative stress model in which Se-deficient diet was fed to male Wister rats for 8 weeks. As expected, effects of oxidative damage, including Fe accumulation and increase in peroxidized lipids, were identified in the liver owing to the lack of glutathione peroxidase. Although the oxidative st...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/j.chemphyslip.2007.04.005
更新日期：2007-08-01 00:00:00
abstract：:Binary membranes composed of dimyristoylphosphatidylcholine (DMPC) and natural ceramide (up to a mole fraction Xcer = 0.25) were investigated by measuring the excimer:monomer fluorescence emission intensity ratio IE:IM for the pyrene labeled phospholipid probe 1-palmitoyl-2[(pyren-1-yl)]decanoyl-sn-glycero-3-phosphoch...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/s0009-3084(97)00040-6
更新日期：1997-08-08 00:00:00
abstract：:In this report we have investigated the differences in the uptake and metabolization of exogenous GM1 by human fibroblasts, as a function of its supramolecular organization in solution. For this we used a tritium labelled GM1, given alone or inserted in dispersions of phosphatidylcholine (PC) or sulphatide. The additi...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/0009-3084(90)90080-b
更新日期：1990-08-01 00:00:00
abstract：:Caged ceramide analogues (C6-, C16-, C18-, C22- and C24-Cer) have been prepared by introducing a hydrophilic coumarin-based cage bearing a short polyethylene glycol (PEG) chain. (6-Bromo-7-mTEGylated-coumarin-4-yl)methyl (Btc) caged ceramide showed efficient photo-uncaging to release the parent ceramide upon direct ex...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/j.chemphyslip.2015.07.006
更新日期：2016-01-01 00:00:00
abstract：:The role of the ceramide moiety of gangliosides, together with the deriving aggregative properties of ganglioside in solution, in the process of ganglioside-cell interactions was studied. The natural GM1(stearoyl) and the synthetic GM1(acetyl), containing the stearoyl and acetyl groups as the acyl moiety, respectively...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/0009-3084(92)90048-t
更新日期：1992-07-01 00:00:00
abstract：:The role of membrane cholesterol as a crucial regulator in the structure and function of membrane proteins and receptors is well documented. However, there is a lack of consensus on the mechanism for such regulation. We have previously shown that the function of an important neuronal receptor, the serotonin1A receptor...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/j.chemphyslip.2016.02.004
更新日期：2016-03-01 00:00:00
abstract：:Biological effects of foreign substances are usually caused by their interaction within lipid bilayers with the membrane lipids. It is therefore desirable in many situations to determine the effects and the partition of xenobiotic substances, as well as drugs, added to amphiphile-water systems. Bicontinuous cubic liqu...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/s0009-3084(96)02633-3
更新日期：1996-12-20 00:00:00
abstract：:A brief review is given on the principles and methods used to investigate structural phase transitions in phospholipid supramolecular structures. The conceptual differences of approaches close to and far from equilibrium are addressed, and the consequences in terms of the limits of interpretation for different types o...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章,评审
doi：10.1016/0009-3084(91)90072-j
更新日期：1991-03-01 00:00:00
abstract：:Sphingolipids are recognized as signaling mediators in a growing number of pathways, and represent potential targets to address many diseases. The study of sphingolipid signaling in yeast has created a number of breakthroughs in the field, and has the potential to lead future advances. The aim of this article is to pr...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章,评审
doi：10.1016/j.chemphyslip.2013.10.006
更新日期：2014-01-01 00:00:00
abstract：:A series of polyprenyl phosphates with modified structure of polyprenyl residue was prepared through phosphorylation of polyprenyl trichloroacetimidates with phosphoric acid. Interaction of polyprenols with tetra-n-butylammonium dihydrogen phosphate and trichloroacetonitrile was found to represent a very efficient, si...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/0009-3084(89)90006-6
更新日期：1989-11-01 00:00:00
abstract：:As part of a program to prepare delta 8(14)-15-ketosterols that cannot readily be metabolized to cholesterol or side-chain oxygenated species, we have prepared 3 beta-hydroxy-7 alpha-fluoro-5 alpha-cholest-8(14)-en-15-one (VII) and the 9 alpha-hydroxy (IV), 9 alpha-fluoro (VI) and 7 alpha-fluoro (VIII) derivatives of ...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/0009-3084(94)90017-5
更新日期：1994-06-24 00:00:00
abstract：:Production of conjugated linoleic acids (CLA) using castor oil as starting material involves conversion of ricinoleic acid to methyl 12-mesyloxy-octadec-9-enoate (MMOE) followed by dehydration. This process usually uses 1,8-diazabicyclo-(5.4.0)-undec-7-ene (DBU) as an expensive dehydrating reagent. The present study r...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/s0009-3084(02)00052-x
更新日期：2002-10-01 00:00:00
abstract：:2',7'-Dichlorodihydrofluorescein diacetate (DCFH-DA) is commonly used to detect the generation of reactive oxygen intermediates and for assessing the overall oxidative stress in toxicological phenomenon. It has been suggested that DCFH-DA crosses the cell membrane, subsequently undergoing deacetylation by intracellula...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/j.chemphyslip.2004.04.006
更新日期：2004-08-01 00:00:00
abstract：:Antioxidative effects of the principal polyphenolic components extracted from green tea leaves, i.e. (-)-epicatechin (EC), (-)-epicatechin gallate (ECG), (-)-epigallocatechin gallate (EGCG), (-)-epigallocatechin (EGC), and gallic acid (GA), against free radical initiated peroxidation of rat liver microsomes were studi...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/s0009-3084(02)00110-x
更新日期：2002-12-01 00:00:00
abstract：:A new acoustical method for the investigation of lipid phase transition is introduced based on the measurement of the thermal acoustic radiation (TAR) inherent in lipids. The TAR of multilamellar vesicles from dipalmitoylphosphatidylcholine (DPPC) and dimyristoylphosphatidylcholine (DMPC) was measured in the megahertz...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/j.chemphyslip.2008.03.001
更新日期：2008-06-01 00:00:00
abstract：:Thio analogs of platelet activating factor (PAF) are of great interest because they exhibit antineoplastic properties both in vitro and in vivo. In contrast to most known anticancer agents, these lipids appear not to act through the synthesis and function of DNA and, therefore, offer a new avenue of approaching cancer...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/s0009-3084(96)02615-1
更新日期：1996-11-01 00:00:00
abstract：:Seven members of the methyl-6-O-(n-acyl)-α-D-glucopyranosides have been synthesised and their transitional properties determined. The undecanoyl and octadecanoyl members do not exhibit liquid crystallinity while the members having chain lengths between dodecanoyl and hexadecanoyl exhibit a monotropic smectic A phase. ...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/j.chemphyslip.2010.11.007
更新日期：2011-02-01 00:00:00
abstract：:Electrostatic interaction is an important secondary force affecting the structure, stability, and function of lipid vesicles (liposomes). For this study, a negatively charged lipid with carboxylic acid was mixed with phospholipid to produce anionic vesicles. The electrostatics of the carboxylated anionic vesicle (ca. ...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/j.chemphyslip.2011.01.002
更新日期：2011-03-01 00:00:00
abstract：:Metabolic labeling, in which substrate analogs containing diminutive tags can infiltrate biosynthetic pathways and generate labeled products in cells, has led to dramatic advancements in the means by which complex biomolecules can be detected and biological processes can be elucidated. Within this realm, metabolic lab...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/j.chemphyslip.2020.104971
更新日期：2020-10-01 00:00:00
abstract：:EmrE is a bacterial transporter protein that forms an anti-parallel homodimer with four transmembrane helices in each monomer. EmrE transports positively charged aromatic compounds, such as TPP+ and its derivatives. We performed molecular dynamics (MD) simulations of EmrE in complex with TPP+, MeTPP+, and MBTPP+ embed...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/j.chemphyslip.2017.12.004
更新日期：2018-05-01 00:00:00
abstract：:The 17-propanamide derivatives of diastereomeric Δ(14)-17α- and 17β-estradiols, the potential candidates of a 17β-hydroxysteroid dehydrogenase (17β-HSD) inhibitor, were synthesized in 11 steps from estrone. The principal reactions employed involved in (1) conversion of estrone to the corresponding Δ(14)-estrone, (2) G...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/j.chemphyslip.2010.11.005
更新日期：2011-02-01 00:00:00
abstract：:[4,4-2H2]-, [5,5-2H2)-, [6-2H]-, [7-2H]-, [8,8-2H2)-, [11,11-2H2]-, [14,14-2H2]- and [18,18,18-2H3]-cis,cis-octadeca-6,9-dienoic (isolinoleic) acid were synthesized by supplementing cultures of the protozoan Tetrahymena with the corresponding deuterated cis-octadeca-9-enoic (oleic) acids. The cultures were harvested, ...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/0009-3084(90)90055-v
更新日期：1990-04-01 00:00:00
abstract：:A method using liquid chromatography - atmospheric pressure chemical ionisation mass spectrometry was evaluated for determining the molecular species composition of phospholipids (phosphatidylcholines from soybean, egg yolk and bovine liver) after conversion to diacylglycerol nicotinate derivatives. The structures cou...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/s0009-3084(01)00130-x
更新日期：2001-05-01 00:00:00
abstract：:20-hydroxycholesterol is a signaling oxysterol with immunomodulating functions and, thus, structural analogues with reporter capabilities could be useful for studying and modulating the cellular processes concerned. We have synthesized three new 20-hydroxycholesterol-like pregn-5-en-3β-ol derivatives with fluorescent ...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/j.chemphyslip.2019.104850
更新日期：2020-03-01 00:00:00
abstract：:Fusion of the single-walled liposomes of egg phosphatidylcholine as induced by the polyisoprenoids such as solanesol, trans-ethyl decaprenoate (EDP), coenzyme Q10, and dolichol has been investigated adopting the fluorescence quenching method. Relative efficiency of the polyisoprenoids employed on the induced fusion of...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/0009-3084(83)90016-6
更新日期：1983-08-01 00:00:00
abstract：:The present study is aimed to characterize the electrostatic parameters of oil in water emulsion droplets composed of MCT (medium chain triglycerides), PL (phospholipids) and Poloxamer and containing increasing concentrations of the cationic lipid oleylamine (OA), in Hepes 20 mM pH 7.4. The initial zeta-potential data...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/j.chemphyslip.2004.04.003
更新日期：2004-08-01 00:00:00
abstract：:Platelet activating factor is one of the most potent inflammatory ether phospholipid mediators known and structurally modified analogues are of considerable interest as potential therapeutic preparations. Inspired by the proposed structure for a novel endogenous hydroxy-PAF analogue isolated recently from gingival cre...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/j.chemphyslip.2005.07.007
更新日期：2005-12-01 00:00:00
abstract：:The interactions of liposomes with cells have been extensively studied to determine their potential use as vehicles for the delivery of drugs in vivo. Since intravenously administered liposomes are, for the most part, cleared by cells of the reticuloendothelial system (RES), considerable effort has been made to take a...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/0009-3084(86)90080-0
更新日期：1986-06-01 00:00:00
abstract：:Various hydrophobic benzenediacetic esters, the corresponding benzenedipropionic esters, and branched alkyl esters were intercalated into DMPC liposomes, where the molar ratio (n/n) of ester:DMPC was 1:5. In the case of the very long-chain derivatives, double carbonyl peaks were observed in the 13C NMR spectrum. This ...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/j.chemphyslip.2008.07.005
更新日期：2008-10-01 00:00:00
abstract：:Isopropyl myristate (IPM) is a widely used penetration enhancer in pharmaceutical formulations, however, its mechanism of action on a molecular scale is still not completely understood. Previous work using a quaternary Stratum Corneum (SC) lipid model in bulk suggested the incorporation of isopropyl myristate into the...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/j.chemphyslip.2017.02.002
更新日期：2017-04-01 00:00:00
