Abstract:
:High density lipophorin (HDLp is the main lipoprotein found in resting insect hemolymph. It has, in general, two molecules of apolipoproteins: apoLp-I (250 kDa) and apoLp-II (80 kDa) and a variable lipid content which ranges from 35% to 59% (w/w). Diacylglycerols (DG), phospholipids (PL), and hydrocarbons (HC) are the main lipid components, whereas cholesterol and triacylglycerols are minor components. DG content varies from 7 to 30%, PL from 11 to 24%, and HC from 0 to 15%. In order to determine the relationship between the lipid composition and the arrangement of lipid and protein components in the lipoprotein particle, a density-composition structural model was designed. The model was established by means of 12 sets of data on lipophorin density-composition relationships, and model validity was determined throughout lipoprotein space- and surface-filling conditions. Despite the differences among the lipid compositions of lipophorins, it is concluded that there are several unifying structural restrictions that govern the molecular organization of lipophorins. Quantitative treatment of the model indicates that lipophorin structure is consistent with the following. 1) Spherical particles with a protein-rich outer layer of approximately 20-21 A thickness, comprised of proteins, phospholipids, cholesterol, and small amounts of DG, and a lipid-rich core composed of HC, TG, and almost all the lipophorin DG. 2) Apolipophorins have a lipid-embedded localization within the lipoprotein particle. They might represent one of the few examples of proteins containing beta-shift structure, exerting strong hydrophobic interaction and having a lipid-embedded localization.(ABSTRACT TRUNCATED AT 250 WORDS)
journal_name
J Lipid Resjournal_title
Journal of lipid researchauthors
Soulages JL,Brenner RRsubject
Has Abstractpub_date
1991-03-01 00:00:00pages
407-15issue
3eissn
0022-2275issn
1539-7262journal_volume
32pub_type
杂志文章abstract::Boiled coffee contains an unidentified lipid that raises serum cholesterol. We studied the effects of the ingestion of coffee oil fractions of increasing purity in volunteers in order to identify the cholesterol-raising factor. In 15 volunteers who ingested 0.75 g/d of a non-triglyceride-fraction from coffee oil for 4...
journal_title:Journal of lipid research
pub_type: 临床试验,杂志文章,随机对照试验
doi:
更新日期:1994-04-01 00:00:00
abstract::We investigated the formation and pharmacology of prostaglandin E(3) (PGE(3)) derived from fish oil eicosapentaenoic acid (EPA) in human lung cancer A549 cells. Exposure of A549 cells to EPA resulted in the rapid formation and export of PGE(3.) The extracellular ratio of PGE(3) to PGE(2) increased from 0.08 in control...
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abstract::Liver and kidney microsomes have been found to catalyze a rapid decarboxylation of retinoic acid in vitro. The reaction requires NADPH and Fe(2+), and is further stimulated by the presence of pyrophosphate. Thiamine pyrophosphate contained sufficient iron as an impurity to provide strong enhancement of the reaction in...
journal_title:Journal of lipid research
pub_type: 杂志文章
doi:
更新日期:1968-07-01 00:00:00
abstract::This report describes the chemical synthesis of isoursocholic acid (3 beta, 7 beta, 12 alpha-trihydroxy-5 beta-cholanoic acid) from its corresponding 3 alpha-analog. The method consists of refluxing a mixture of ursocholic acid, triphenylphosphine, and diethyl azodicarboxylate in benzene solution with an acid such as ...
journal_title:Journal of lipid research
pub_type: 杂志文章
doi:
更新日期:1991-08-01 00:00:00
abstract::To determine the acute effects of insulin on lipoprotein metabolism, we have followed the plasma lipoprotein lipid and apolipoprotein levels during insulin therapy for the first 24 hr in 13 patients with diabetic ketoacidosis. Corrections were made for plasma volume changes during treatment. Before insulin treatment, ...
journal_title:Journal of lipid research
pub_type: 杂志文章
doi:
更新日期:1982-01-01 00:00:00
abstract::Fluorescence energy transfer from dehydroergosterol (DHE) to dansylated lecithin (DL) was used to characterize lecithin-cholesterol vesicles in the presence of the bile salt, sodium taurocholate. At lipid concentrations approximating physiological levels, exposure of fluorescently labeled vesicles to the bile salt led...
journal_title:Journal of lipid research
pub_type: 杂志文章
doi:
更新日期:2001-06-01 00:00:00
abstract::High plasma cholesterol levels are found in several metabolic disorders and their reductions are advocated to reduce the risk of atherosclerosis. A way to lower plasma lipids is to curtail lipoprotein production; however, this is associated with steatosis. We previously showed that microRNA (miR)-30c lowers diet-induc...
journal_title:Journal of lipid research
pub_type: 杂志文章
doi:10.1194/jlr.M081299
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journal_title:Journal of lipid research
pub_type: 杂志文章
doi:
更新日期:1970-07-01 00:00:00
abstract::In studies of cebus monkey plasma lipoproteins, we have used an ultracentrifugally generated density gradient to isolate two distinct species of low density lipoproteins (LDL). Compositional analyses revealed that each of the ultracentrifugally isolated fractions was enriched in cholesteryl esters and contained a sing...
journal_title:Journal of lipid research
pub_type: 杂志文章
doi:
更新日期:1989-05-01 00:00:00
abstract::Ac-hE18A-NH2 is a dual-domain apoE mimetic peptide that possesses the putative receptor binding domain from apoE (LRKLRKRLLR, denoted hE; residues 141-150) covalently attached to lipid-associating peptide 18A. Like apoE, Ac-hE18A-NH2 reduces plasma cholesterol in animal models and exhibits anti-inflammatory properties...
journal_title:Journal of lipid research
pub_type: 杂志文章
doi:10.1194/jlr.M085985
更新日期:2018-11-01 00:00:00
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journal_title:Journal of lipid research
pub_type: 杂志文章
doi:
更新日期:1998-12-01 00:00:00
abstract::Serum amyloid P (SAP) is a common component of human amyloid deposits and has been identified in atherosclerotic lesions. We investigated the extent of the colocalization of SAP with apolipoprotein A-I (apoA-I), apoB, apoC-II, and apoE in human coronary arteries and explored potential roles for SAP in these regions, s...
journal_title:Journal of lipid research
pub_type: 杂志文章
doi:10.1194/jlr.M700098-JLR200
更新日期:2007-10-01 00:00:00
abstract::Inflammation has been proposed to impair HDL function and reverse cholesterol transport (RCT). We investigated the effects of inflammation mediated by zymosan, a yeast glucan, on multiple steps along the RCT pathway in vivo and ex vivo. Acute inflammation with 70 mg/kg zymosan impaired RCT to plasma, liver, and feces ...
journal_title:Journal of lipid research
pub_type: 杂志文章
doi:10.1194/jlr.M011122
更新日期:2011-05-01 00:00:00
abstract::PAF-dependent transacetylase (TA) modifies the functions of platelet-activating factor (PAF), a potent inflammatory lipid, either by transferring the acetyl group from PAF to lysophospholipids (TAL activity), or to sphingosine (TAS activity) or by hydrolyzing PAF (acetylhydrolase activity). In stimulated endothelial c...
journal_title:Journal of lipid research
pub_type: 杂志文章
doi:10.1194/jlr.M200292-JLR200
更新日期:2003-02-01 00:00:00
abstract::Delta-5 and delta-6 desaturases (D5D and D6D) are key enzymes in endogenous synthesis of long-chain PUFAs. In this sample of healthy subjects (n = 310), genotypes of single nucleotide polymorphisms (SNPs) rs174537, rs174561, and rs3834458 in the FADS1-FADS2 gene cluster were strongly associated with proportions of LC-...
journal_title:Journal of lipid research
pub_type: 杂志文章,随机对照试验
doi:10.1194/jlr.P032276
更新日期:2013-02-01 00:00:00
abstract::HDL plays crucial roles at multiple stages of the pathogenesis of atherosclerosis. AMP-activated protein kinase (AMPK) is a therapeutic candidate for the treatment of cardiovascular disease. However, the effect of AMPK activation on HDL functionality has not been established in vivo. We assessed the effects of pharmac...
journal_title:Journal of lipid research
pub_type: 杂志文章
doi:10.1194/jlr.M073270
更新日期:2017-08-01 00:00:00
abstract::Percent cholesterol absorption was measured in 94 normal subjects aged 17- 80 years while consuming diets generally low in cholesterol (mean intake = 226 +/- 126 mg/day). A new dual stable isotope method was used where a cholesterol tracer containing 6 extra mass units was given intravenously and another tracer with 5...
journal_title:Journal of lipid research
pub_type: 杂志文章
doi:
更新日期:1999-02-01 00:00:00
abstract::Ceramides play an essential role in modulating immune signaling pathways and proinflammatory cytokine production in response to infectious pathogens, stress stimuli, or chemotherapeutic drugs. In this study, we demonstrated that Aggregatibacter actinomycetemcomitans, the pathogen for aggressive periodontitis, induced ...
journal_title:Journal of lipid research
pub_type: 杂志文章
doi:10.1194/jlr.M031427
更新日期:2013-01-01 00:00:00
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journal_title:Journal of lipid research
pub_type: 杂志文章
doi:10.1194/jlr.D200045-JLR200
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journal_title:Journal of lipid research
pub_type: 杂志文章
doi:
更新日期:1996-01-01 00:00:00
abstract::Cholesterol 7alpha-hydroxylase, a rate-limiting enzyme for bile acid synthesis, has been implicated in genetic susceptibility to atherosclerosis. The gene, CYP7A1, encoding a protein with this activity, is expressed normally only in hepatocytes and is highly regulated. Our cyp7A1 gene knockout mouse colony, as young a...
journal_title:Journal of lipid research
pub_type: 杂志文章
doi:10.1194/jlr.M200489-JLR200
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journal_title:Journal of lipid research
pub_type: 杂志文章
doi:
更新日期:1999-12-01 00:00:00
abstract::Chiral phase high performance liquid chromatographic resolution of sn-1,2(2,3)- and X-1,3-diacylglycerols generated by partial Grignard degradation from natural triacylglycerols was carried out using a chiral column (25 cm x 4.6 mm i.d.) containing (R)-(+)-1-(1-napthyl)ethylamine polymer chemically bonded to 300A wide...
journal_title:Journal of lipid research
pub_type: 杂志文章
doi:
更新日期:1990-09-01 00:00:00
abstract::In eukaryotes, many cell surface proteins are attached to the plasma membrane via a glycolipid glycosylphosphatidylinositol (GPI) anchor. GPI-anchored proteins (GPI-APs) receive the GPI anchor as a conserved posttranslational modification in the lumen of the endoplasmic reticulum (ER). After anchor attachment, the GPI...
journal_title:Journal of lipid research
pub_type: 杂志文章,评审
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abstract::Adiponectin, an adipocyte-derived protein, has anti-atherogenic and anti-diabetic effects, but how it confers the anti-atherogenic effects is not well understood. To study the anti-atherogenic mechanisms of adiponectin, we examined whether it interacts with atherogenic low-density lipoprotein (LDL) to attenuate LDL's ...
journal_title:Journal of lipid research
pub_type: 杂志文章
doi:10.1194/jlr.RA120000767
更新日期:2020-11-03 00:00:00
abstract::Activation of cultured hepatic stellate cells correlated with an enhanced expression of proteins involved in uptake and storage of fatty acids (FA translocase CD36, Acyl-CoA synthetase 2) and retinol (cellular retinol binding protein type I, CRBP-I; lecithin:retinol acyltransferases, LRAT). The increased expression of...
journal_title:Journal of lipid research
pub_type: 杂志文章
doi:10.1194/jlr.M200376-JLR200
更新日期:2003-02-01 00:00:00
abstract::A reproducible cell culture system is described that allows the study of adipose conversion in fibroblast-like cells isolated by collagenase digestion of epididymal and perirenal adipose tissue from male rats weighing 70-200 g. Adipose conversion as measured by lipid accumulation and increase in glycerophosphate dehyd...
journal_title:Journal of lipid research
pub_type: 杂志文章
doi:
更新日期:1987-06-01 00:00:00
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journal_title:Journal of lipid research
pub_type: 杂志文章
doi:10.1194/jlr.RA119000420
更新日期:2020-02-01 00:00:00
abstract::Diet1 modulates intestinal production of the hormone, fibroblast growth factor (FGF)15, which signals in liver to regulate bile acid synthesis. C57BL/6ByJ mice with a spontaneous Diet1-null mutation are resistant to hypercholesterolemia compared with wild-type C57BL/6J mice through enhanced cholesterol conversion to b...
journal_title:Journal of lipid research
pub_type: 杂志文章
doi:10.1194/jlr.M078279
更新日期:2018-03-01 00:00:00
abstract::The effect of 26-hydroxycholesterol and other intermediates in bile acid synthesis on HMG-CoA reductase activity was studied in Chinese hamster ovary (CHO) cell culture. Incubation of CHO cells for 5 hr in 0.25 microM 26-hydroxycholesterol caused a 40% inhibition of HMG-CoA reductase activity. All other intermediates ...
journal_title:Journal of lipid research
pub_type: 杂志文章
doi:
更新日期:1983-10-01 00:00:00