Abstract：
:Under condition of ROS formation in lipid membranes, free radical reactions can proceed in both hydrophobic (peroxidation of lipids, POL) and polar (free radical fragmentation) parts of the bilayer. Free-radical fragmentation is typical for the lipids containing a hydroxyl group in β-position with respect to an ester or amide bond. The present study has been undertaken to investigate free-radical transformations of phospholipids in model membranes containing lipids able to undergo fragmentation in their polar part. Liposomes from egg yolk lecithin containing saturated or monounsaturated glycero- and sphingolipids were subjected to the action of an HO* - generating system - Fe(2+)(Cu(2+))/H2O2/Asc, and the POL products were investigated. In parallel with this, the effects of monoacylglycerols and scavengers of reactive species on Fe(2+)(Cu(2+))/H2O2/Asc - mediated free-radical fragmentation of phosphatidylglycerols were studied. Hydroxyl-containing sphingolipids and glycerolipids, which undergo free-radical fragmentation under such conditions, manifested antioxidant properties in the model membranes. In the absence of HO groups in the lipid structure, the effect was either pro-oxidant or neutral. Monoacylglycerols slowed down the rate of both peroxidation in the hydrophobic part and free-radical fragmentation in the hydrophilic part of phospholipid membrane. Scavengers of reactive species inhibited the fragmentation of phosphatidylglycerol substantially. Thus, the ability of hydroxyl-containing lipids to undergo free-radical fragmentation in polar part apparently makes a substantial contribution to the mechanism of their protector action.
journal_name
Chem Phys Lipidsjournal_title
Chemistry and physics of lipidsauthors
Olshyk VN,Melsitova IV,Yurkova ILdoi
10.1016/j.chemphyslip.2013.10.010subject
Has Abstractpub_date
2014-01-01 00:00:00pages
1-7eissn
0009-3084issn
1873-2941pii
S0009-3084(13)00138-2journal_volume
177pub_type
杂志文章abstract：:The current-voltage steady-state characteristics, cyclic voltammograms and capacitance-voltage steady-state relationships of bilayer lipid membranes made from dioleoylphosphatidylcholine or its mixtures with dolichyl-12 phosphate have been studied. Sustained fluctuations of the capacitance of dolichyl phosphate modifi...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
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更新日期：1990-01-01 00:00:00
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更新日期：1998-12-01 00:00:00
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更新日期：2018-07-01 00:00:00
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journal_title：Chemistry and physics of lipids
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更新日期：1976-02-01 00:00:00
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更新日期：1988-01-01 00:00:00
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更新日期：1983-12-01 00:00:00
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更新日期：2004-04-01 00:00:00
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更新日期：2018-07-01 00:00:00
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更新日期：1978-10-01 00:00:00
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journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/0009-3084(77)90013-5
更新日期：1977-04-01 00:00:00
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journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/0009-3084(91)90017-6
更新日期：1991-11-01 00:00:00
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journal_title：Chemistry and physics of lipids
pub_type： 杂志文章,评审
doi：10.1016/0009-3084(91)90084-o
更新日期：1991-03-01 00:00:00
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journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/j.chemphyslip.2017.04.008
更新日期：2017-06-01 00:00:00
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journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/j.chemphyslip.2009.08.001
更新日期：2010-01-01 00:00:00
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journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/0009-3084(86)90126-x
更新日期：1986-08-01 00:00:00
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journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
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更新日期：1982-12-01 00:00:00
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更新日期：1994-01-01 00:00:00
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doi：10.1016/j.chemphyslip.2011.01.005
更新日期：2011-03-01 00:00:00
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journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/j.chemphyslip.2010.04.008
更新日期：2010-06-01 00:00:00
abstract：:The decomposition of hydrogen peroxide catalyzed by catalase entrapped in the pool of dipalmitoylphosphatidyl choline unilamellar liposomes has been studied. The rate of the process was evaluated by following the production of oxygen as a function of time. Under the experimental conditions employed the rate of oxygen ...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/j.chemphyslip.2012.07.001
更新日期：2012-09-01 00:00:00
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journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/s0009-3084(03)00087-2
更新日期：2003-10-01 00:00:00
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journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/0009-3084(79)90094-x
更新日期：1979-04-01 00:00:00
abstract：:Delta(9)-Tetrahydrocannabinol (delta(9)-THC), the primary psychoactive constituent of marijuana (Cannabis sativa), is known to bind to two cannabinoid receptors: CB(1) receptors, located primarily in the brain, and CB(2) receptors, located primarily in the periphery. Recent research has suggested that other cannabinoi...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章,评审
doi：10.1016/s0009-3084(02)00146-9
更新日期：2002-12-31 00:00:00
abstract：:Lipid-based carriers represent the most widely used alternative to viral vectors for gene expression and gene silencing purposes. This class of non-viral vectors is particularly attractive for their ease of synthesis and chemical modifications to endow them with desirable properties. Despite combinatorial approaches h...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章,评审
doi：10.1016/j.chemphyslip.2020.105032
更新日期：2021-01-08 00:00:00
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journal_title：Chemistry and physics of lipids
pub_type： 杂志文章,评审
doi：10.1016/j.chemphyslip.2006.02.017
更新日期：2006-06-01 00:00:00
abstract：:Low density lipoprotein (LDL) particles exhibit extremely complex three-dimensional structural organization which is still not understood at the molecular level. The aim of this study was to provide the experimental evidence of a direct non-covalent interaction of the protein part with the lipid matrix. The approach w...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/j.chemphyslip.2006.02.014
更新日期：2006-06-01 00:00:00
abstract：:Fluorescence measurements of 1,6-diphenyl-1,3,5-hexatriene (DPH) in large unilamellar phospholipid vesicles were performed to characterize the influence of the membrane physical properties on the short-lived lifetime component of the fluorescence decay. We have found that the short-lived component of DPH significantly...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/j.chemphyslip.2004.02.005
更新日期：2004-07-01 00:00:00
abstract：:We present the results of a comparative differential calorimetric and Fourier transform infrared spectroscopic study of the effect of cholesterol and five analogues on the thermotropic phase behaviour and organization of dipalmitoylphosphatidylcholine bilayer membranes. These sterols/steroids differ in both the nature...
journal_title：Chemistry and physics of lipids
pub_type： 杂志文章
doi：10.1016/j.chemphyslip.2015.03.002
更新日期：2015-05-01 00:00:00
