Abstract：
:When we subjected 11-dehydrothromboxane B2 (11-DTXB2), a metabolite of arachidonic acid, to standard chemical derivatization procedures we obtained a mixture of several products. Separation of the components was carried out by gas chromatography and their identification was accomplished through the study of their mass spectra, which are presented here. Anomalous behaviors include methylation of allylic and alcoholic hydroxyl groups by diazomethane, unusually slow derivatization of one of the hydroxyl groups with N,O-bis(trimethylsilyl)-trifluoroacetamide (BSTFA) and etherification of another with ethanol. The underlying causes of these abnormal behaviors are not obvious, but appear to be related, at least in part, to the opening/closure of a lactone ring in the molecule. These observations have some bearing on the development of valid procedures for GC-MS quantification of this important marker of thromboxane A2 synthesis in vivo, and of similar compounds.
journal_name
Chem Phys Lipidsjournal_title
Chemistry and physics of lipidsauthors
Ferretti A,Flanagan VPdoi
10.1016/0009-3084(95)02452-osubject
Has Abstractpub_date
1995-08-01 00:00:00pages
33-40issue
1eissn
0009-3084issn
1873-2941pii
000930849502452Ojournal_volume
77pub_type
杂志文章abstract：:The effect of 2,4-dichlorophenol (DCP) on the structures and phase transitions of fully hydrated 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) liposomes was studied using FT-Raman spectroscopy. Whereas the Raman frequency shifts of the most frequently investigated bands of C-C and C-H stretching regions only indi...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/j.chemphyslip.2005.11.005
更新日期：2006-02-01 00:00:00
abstract：:Cardiolipin is a major phospholipid in mitochondria and is involved in the generation of cellular energy in the form of ATP. In mammalian and eukaryotic cells it is synthesized via the cytidine-5'-diphosphate-1,2-diacyl-sn-glycerol phosphate pathway. This brief review will describe some of the more recent studies on m...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章,评审
doi：10.1016/j.chemphyslip.2013.10.001
更新日期：2014-04-01 00:00:00
abstract：:From 81 of human plasma of blood-group A Lea nonsecretors three different Lea blood-group active ceramide pentasaccharides (a total of 4.65 mg) have been isolated, all revealing glucose, galactose, N-acetylglucosamine and fucose in molar ratios of 1 : 2 : 1 : 1 as determined by gas liquid chromatography. A fourth bloo...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/0009-3084(78)90040-3
更新日期：1978-09-01 00:00:00
abstract：:Chain-ordering/melting transition in a series of saturated diacylphosphatidylcholines (PCs) in aqueous dispersions have been studied experimentally (calorimetric and ultrasonic techniques) and theoretically (an Ising-like lattice model). The shape of the calorimetric curves was compared with the theoretical data and i...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/j.chemphyslip.2007.08.004
更新日期：2007-12-01 00:00:00
abstract：:Human erythrocyte band 3 reconstituted into phospholipid vesicles has been used for studying the interaction of interdigitated lipid bilayer with an integral membrane protein. The interdigitated gel phase in DPPG/band 3 or DPPG/DMPC/band 3 systems was induced with polymyxin B (PMB) or Tris+. The phase transitions of t...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/0009-3084(94)90005-1
更新日期：1994-03-01 00:00:00
abstract：PURPOSE:The present research work involves Quality by Design (QbD)-based fabrication of lipid nanoconstructs (LNC) of paliperidone (PPD) bearing superior biopharmaceutical attributes. METHODS:LNC of paliperidone was prepared by melt emulsification-probe sonication and high-pressure homogenization method followed by op...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/j.chemphyslip.2020.105005
更新日期：2021-01-01 00:00:00
abstract：:The importance of phospholipases in cellular signaling and 1-alkylglycerophosphocholine acetyltransferase in the formation of platelet-activating factor (PAF) has stimulated demand for methods to measure these enzyme activities in inflammatory cells. Most of the assays currently used rely on radiolabeled substrates. W...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/0009-3084(95)02504-9
更新日期：1996-01-25 00:00:00
abstract：:To investigate the efficacy of reducing plasma lipoprotein(a) (Lp(a)) as well as low density lipoprotein cholesterol (LDL-C) levels on the prevention of restenosis after PTCA, LDL-apheresis was attempted on a total of 54 patients at six institutions. LDL-apheresis using a dextran sulfate cellulose column has been prov...
journal_title：Chemistry and physics of lipids
pub_type： 临床试验,杂志文章,多中心研究
doi：10.1016/0009-3084(94)90162-7
更新日期：1994-01-01 00:00:00
abstract：:Bacteriophage M13 major coat protein is extensively used as a biophysical, biochemical, and molecular biology reference system for studying membrane proteins. The protein has several elements that control its position and orientation in a lipid bilayer. The N-terminus is dominated by the presence of negatively charged...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章,评审
doi：10.1016/j.chemphyslip.2006.02.023
更新日期：2006-06-01 00:00:00
abstract：:Prion diseases are fatal neurodegenerative disorders affecting many mammals, ovine scrapie being the archetypal prion disease. Several independent studies in murine and cell-based models of scrapie have highlighted the presence of a link between prion generation and lipid alterations; yet, no data on natural disease a...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/j.chemphyslip.2013.08.001
更新日期：2013-10-01 00:00:00
abstract：:Cardiolipins (CLs) are ancient and unusual dimeric phospholipids localized in the plasma membrane of bacteria and in the inner mitochondrial membrane of eukaryotes. In mitochondria, two types of asymmetries--trans-membrane and molecular--are essential determinants of CL functions. In this review, we describe CL-based ...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章,评审
doi：10.1016/j.chemphyslip.2013.11.010
更新日期：2014-04-01 00:00:00
abstract：:Poly(ethylene glycol)-coated liposomes were prepared with two new synthesised pegylated cholesterol (Chol) derivatives linked via carbamate bond. Poly(ethylene glycol) (PEG) was directly linked to Chol (PEG-Chol) or through a space arm of diaminebutane (PEG-L-Chol). In buffer, the physicochemical properties of PC/Chol...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/s0009-3084(01)00178-5
更新日期：2001-11-01 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：:Based on size and compositional data, models for the two major density subclasses of human serum high density lipoproteins have been developed. Descriptions of both the surface structure of the high density lipoproteins and the structure of their apolar core regions are integral parts of these models. The surface is d...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/0009-3084(75)90054-7
更新日期：1975-04-01 00:00:00
abstract：:Ionic properties of didodecanoylphosphatidylglycerol (C12PG), didodecanolyphosphatidyl-l'-propanol (C12PP), di-(12-methyl, 13-methyl)-pentadecanoylphosphatidylglycerols (C15PG) and dihexadecanoylphosphatidylglycerol (C16PG) have been studied at the air-water interface using titration experiments at constant ionic stre...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/0009-3084(77)90019-6
更新日期：1977-04-01 00:00:00
abstract：:Neutron scattering is a powerful tool to study relaxation processes in biological membrane mimics in space and time. Combining different inelastic and quasielastic neutron scattering techniques, a large dynamic range can be covered: from atomic to mesoscopic lengths and from femto- to some hundreds of nanoseconds in t...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章,评审
doi：10.1016/j.chemphyslip.2017.05.009
更新日期：2017-08-01 00:00:00
abstract：:Myeloperoxidase released from stimulated neutrophils is able to produce hypochlorous and hypobromous acids. The composition of the reaction products of the interaction of hypohalous acid with double bonds of phosphatidylcholines was analysed by matrix-assisted laser desorption/ionisation time-of-flight mass spectromet...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/j.chemphyslip.2003.12.005
更新日期：2004-04-01 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：:The effect of Lp(a) on lipid metabolism in cells cultured from unaffected human aortic intima has been investigated. Lp(a) isolated from the blood of healthy subjects failed to alter intracellular neutral lipid content. On the other hand, Lp(a) obtained from coronary atherosclerosis patients induced a 1.5- to 2-5-fold...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/0009-3084(94)90135-x
更新日期：1994-01-01 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
abstract：:The aggregative properties of highly pure GM3 ganglioside in aqueous solution have been studied by static and dynamic laser light scattering measurements and fluorescence spectroscopy experiments performed by the use of a GM3 derivative containing the pyrene group at the end of the fatty acid moiety. GM3 ganglioside s...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/0009-3084(90)90119-c
更新日期：1990-02-01 00:00:00
abstract：:A convenient universal and fast mass spectrometrical method designed for the molecular species analysis of natural lipids is described. In contrast to the commonly employed procedures the method does not require chemical or enzymatic treatment and does not include chromatographic steps. The method relies on the recogn...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/0009-3084(83)90027-0
更新日期：1983-11-01 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 leukocyte enzyme myeloperoxidase (MPO) is capable of catalyzing the oxidation of chloride and bromide ions, at physiological concentrations of these substrates, by hydrogen peroxide, generating hypochlorous acid (HOCl) and hypobromous acid (HOBr), respectively. Our previous results showed that the hypohalous acids...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/j.chemphyslip.2007.05.005
更新日期：2007-09-01 00:00:00
abstract：:The apparent Mn2+ binding constant for L-alpha-dipalmitoylphosphatidylcholine (DPPC) bilayers dispersed in monovalent salt and MnCl2 dispersions was determined as a function temperature using electron paramagnetic resonance (ERP). Reproducibility in the data sets requires the use of a standard salt solution and dual c...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/0009-3084(88)90023-0
更新日期：1988-03-01 00:00:00
abstract：:The 220 MHz PMR spectra of 143 non-conjugated alkenoic and alkynoic acids and esters are correlated so as to provide a method for the structural analysis of such compounds in general. The spectral data are explained in terms of long-range deshielding of the double bonds, triple bonds, acid and ester groups in the mole...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/0009-3084(75)90032-8
更新日期：1975-09-01 00:00:00
abstract：:Monolactone (NeuAc1-9NeuAc linkage) formation of a ganglioside, GD1b, was observed at 20 degrees C on solutions ranging in concentration from 0.008 to 1.7 mM and in pH from 2 to 8.1, by following the change of ellipicity at 235 nm, where lactonized gangliosides showed a strong Cotton effect. The lactonization was foun...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/0009-3084(94)90051-5
更新日期：1994-03-31 00:00:00
abstract：:The MARTINI coarse-grained model is used to gain insight into the association of WALP23 helices in three different lipid membranes: DMPC, DPPC and DOPC. Potentials of mean force describing the association of two WALP23 helices embedded in different lipid bilayers indicate no barrier of association and a stabilization ...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/j.chemphyslip.2013.02.001
更新日期：2013-04-01 00:00:00
abstract：:Mammalian cells produce both N-arachidonoylethanolamine (20:4n-6 NAE, anandamide) and 2-arachidonoylglycerol (2-AG), lipid signaling molecules that activate cannabinoid receptors. Because both agonists occur in the presence of receptor-inactive congeners, we have developed a sensitive method for the simultaneous assay...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/s0009-3084(99)00124-3
更新日期：2000-02-01 00:00:00
abstract：:Cannabinoid research underwent a tremendous increase during the last 10 years. This progress was made possible by the discovery of cannabinoid receptors and the endogenous ligands for these receptors. Cannabinoid research is developing in two major directions: neurobehavioral properties of cannabinoids and the impact ...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章,评审
doi：10.1016/s0009-3084(00)00195-x
更新日期：2000-11-01 00:00:00
