Abstract：
:Analytical isoelectric focusing (IEF) has been applied to the study of the apolipoprotein components of rat serum high density and very low density lipoproteins. The apolipoproteins were separated on 7.5% polyacrylamide gels containing 6.8% urea, with a pH gradient of 4-6. The middle molecular weight range apolipoproteins were identified on IEF gels by the use of apolipoproteins purified by electrophoresis on gels containing sodium dodecyl sulfate (SDS). The A-1 protein focused as 4 to 5 bands from pH 5.46 to 5.82; the A-IV protein and the arginine-rich protein each focused as 4 to 6 bands from pH 5.31 to 5.46. The low molecular weight proteins focused from pH. 4.43 to 4.83 and are the subject of a separate communication. Comparisons of the IEF method with SDS gel electrophoresis, polyacrylamide gel electrophoresis in urea, and Sephadex chromatography are also reported. Additional studies were also carried out that tend to rule out carbamylation or incomplete unfolding of the proteins in the presence of urea as the causes of the observed heterogeneity.
journal_name
J Lipid Resjournal_title
Journal of lipid researchauthors
Gidez LI,Swaney JB,Murnane Ssubject
Has Abstractpub_date
1977-01-01 00:00:00pages
59-68issue
1eissn
0022-2275issn
1539-7262journal_volume
18pub_type
杂志文章abstract：:A simple, rapid, and sensitive bioluminescence method for measuring primary bile acids has been developed and validated. The method is based on enzymatic dehydrogenation of bile acids using a bacterial 7 alpha-hydroxysteroid dehydrogenase that is co-immobilized on Sepharose 4B beads with NADH:FMN oxidoreductase and a ...
journal_title：Journal of lipid research
pub_type： 杂志文章
doi：
更新日期：1982-12-01 00:00:00
abstract：:Although numerous studies have investigated the relationship between cholesteryl ester transfer protein (CETP) and high density lipoprotein (HDL) remodeling, the relationship between CETP and low density lipoproteins (LDL) is still not fully understood. In the present study, we examined the effect of the inhibition of...
journal_title：Journal of lipid research
pub_type： 杂志文章
doi：
更新日期：2000-01-01 00:00:00
abstract：:Abetalipoproteinemia (ABL) and chylomicron retention disease (CMRD) are extremely rare recessive forms of hypobetalipoproteinemia characterized by intestinal lipid malabsorption and severe vitamin E deficiency. Vitamin E is often supplemented in the form of fat-soluble vitamin E acetate, but fat malabsorption consider...
journal_title：Journal of lipid research
pub_type： 杂志文章
doi：10.1194/jlr.M085043
更新日期：2018-09-01 00:00:00
abstract：:The esterification of lysophospholipids contributes to phospholipid synthesis, remodeling, and scavenging. Acyl-CoA-dependent lysophospholipid acyltransferase activity with broad substrate use is mediated by Saccharomyces cerevisiae Lpt1p. We sought to identify Lpt1p active site amino acids besides the histidine conse...
journal_title：Journal of lipid research
pub_type： 杂志文章
doi：10.1194/jlr.M062141
更新日期：2015-11-01 00:00:00
abstract：:The Singer-Nicholson model of membranes postulated a uniform lipid bilayer randomly studded with floating proteins. However, it became clear almost immediately that membranes were not uniform and that clusters of lipids in a more ordered state existed within the generally disorder lipid milieu of the membrane. These c...
journal_title：Journal of lipid research
pub_type： 杂志文章,评审
doi：10.1194/jlr.R800040-JLR200
更新日期：2009-04-01 00:00:00
abstract：:Previous studies have shown that antibodies to cubulin, a receptor on the yolk sac that binds high density lipoproteins (HDL) and cobalamin, induce fetal abnormalities. Mice with markedly low concentrations of plasma HDL-cholesterol (HDL-C) give birth to healthy pups, however. To establish whether maternal HDL-C has a...
journal_title：Journal of lipid research
pub_type： 杂志文章
doi：
更新日期：2000-03-01 00:00:00
abstract：:13C-NMR spectroscopy was used to examine the effect of side chain length on the ionization properties and transmembrane transport rate of 3 alpha,7 alpha-dihydroxy bile acids. When solubilized in taurocholate micelles, [23-13C]nor-chenodeoxycholic acid (nor-CDCA) had a pKa of 6.1, similar to that of CDCA (pKa 6.2), it...
journal_title：Journal of lipid research
pub_type： 杂志文章
doi：
更新日期：1994-05-01 00:00:00
abstract：:It was postulated that specialized microdomains of the plasma membrane, consistent with caveolae, might play a role in cholesterol trafficking in intestinal cells. The existence, therefore, of caveolin and the role of detergent-resistant microdomains of the plasma membrane in cholesterol trafficking were investigated ...
journal_title：Journal of lipid research
pub_type： 杂志文章
doi：
更新日期：1998-10-01 00:00:00
abstract：:Ceramides (Cers) with ultralong (∼32-carbon) chains and ω-esterified linoleic acid, composing a subclass called omega-O-acylceramides (acylCers), are indispensable components of the skin barrier. Normal barriers typically contain acylCer concentrations of ∼10 mol%; diminished concentrations, along with altered or miss...
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：:Four distinct subspecies of the insect hemolymph lipoprotein, lipophorin, that range in diacylglycerol (DAG) content from approximately 100 to 1000 molecules per particle, were treated with phospholipase C. Lipid analysis demonstrated that both phosphatidylcholine and phosphatidylethanolamine were hydrolyzed to DAG. P...
journal_title：Journal of lipid research
pub_type： 杂志文章
doi：
更新日期：1994-09-01 00:00:00
abstract：:Tuberculosis is a major cause of mortality and morbidity due to infectious disease. However, current clinical diagnostic methodologies such as PCR, sputum culture, or smear microscopy are not ideal. Antibody-based assays are a suitable alternative but require specific antibodies against a suitable biomarker. Mycolic a...
journal_title：Journal of lipid research
pub_type： 杂志文章
doi：10.1194/jlr.D036137
更新日期：2013-10-01 00:00:00
abstract：:The sialic acid present in erythrocyte ghosts was estimated by methane chemical ionization mass fragmentography of the trimethylsilyl methyl glycosides. The internal standard was 3,4,6-tris-trimethylsilyl-alpha-phenyl-2-deoxy-2-acetamide-D-glucosaminide, as proposed by Yu and Ledeen (J. Lipid Res. 1970. 11: 506-516). ...
journal_title：Journal of lipid research
pub_type： 杂志文章
doi：
更新日期：1980-11-01 00:00:00
abstract：:Human apolipoprotein E (apoE) is a constituent of plasma very low density and high density lipoproteins and is important in modulating the catabolism of remnants of triglyceride-rich lipoproteins. There are three common isoforms of apoE, designated apoE-2, E-3, and E-4, which are coded by three separate alleles (epsil...
journal_title：Journal of lipid research
pub_type： 杂志文章
doi：
更新日期：1984-11-01 00:00:00
abstract：:Niacin, the first antidyslipidemic drug, has been at the center stage of lipid research for many decades before the discovery of statins. However, to date, despite its remarkable effects on lipid profiles, the clinical outcomes of niacin treatment on cardiac events is still debated. In addition to its historically wel...
journal_title：Journal of lipid research
pub_type： 杂志文章
doi：10.1194/jlr.S092007
更新日期：2019-04-01 00:00:00
abstract：:A novel metabolite of d-delta-tocopherol was isolated from the urine of rats given d-3,4-[3H2]-delta-tocopherol intravenously. The metabolite was collected from the urine of rats given d-delta-tocopherol in the same manner as that of the labeled compound. It was found that the metabolites consisted of sulfate conjugat...
journal_title：Journal of lipid research
pub_type： 杂志文章
doi：
更新日期：1984-01-01 00:00:00
abstract：:Experimental approaches involving the perfusion of tissues and organs offer the advantage of improved physiological relevance over the use of isolated tissues or cells while at the same time being much more controlled and tissue-specific than studies in vivo. Nevertheless, there have been few metabolic studies perform...
journal_title：Journal of lipid research
pub_type： 杂志文章
doi：10.1194/jlr.D500016-JLR200
更新日期：2005-08-01 00:00:00
abstract：:Insulin resistance (IR) is associated with elevated plasma levels of triglyceride-rich lipoproteins (TRLs) of intestinal origin. However, the mechanisms underlying the overaccumulation of apolipoprotein (apo)B-48-containing TRLs in individuals with IR are not yet fully understood. This study examined the relationships...
journal_title：Journal of lipid research
pub_type： 杂志文章
doi：10.1194/jlr.M040071
更新日期：2014-01-01 00:00:00
abstract：:Supernatant protein factor (SPF) and anionic phospholipids such as phosphatidylglycerol (PG) stimulate squalene epoxidase activity in rat liver microsomes by promoting [3H]squalene uptake as well as substrate translocation (Chin, J., and K. Bloch. 1984. J. Biol. Chem. 259: 11735-11738). This process is postulated to b...
journal_title：Journal of lipid research
pub_type： 杂志文章
doi：
更新日期：1985-07-01 00:00:00
abstract：:Baboons possess Lp[a] that is similar to human Lp[a], including the presence of the unique protein, apo[a]. Baboon apo[a] occurred in at least nine isoforms distinguishable by size. Isoforms were resolved by 3-12% polyacrylamide gradient gel electrophoretic separation of serum proteins, and were detected with baboon a...
journal_title：Journal of lipid research
pub_type： 杂志文章
doi：
更新日期：1989-04-01 00:00:00
abstract：:Scavenger receptor class B type I (SR-BI) and ABCA1 are structurally dissimilar cell surface proteins that play key roles in HDL metabolism. SR-BI is a receptor that binds HDL with high affinity and mediates both the selective lipid uptake of cholesteryl esters from lipid-rich HDL to cells and the efflux of unesterifi...
journal_title：Journal of lipid research
pub_type： 杂志文章
doi：10.1194/jlr.M300358-JLR200
更新日期：2004-07-01 00:00:00
abstract：:The factors involved in shuttling cholesterol among cellular membranes have not been defined. Using amphotericin B selection, we previously isolated Chinese hamster ovary cell mutants expressing defects in intracellular cholesterol transport. Complementation analysis among seven mutants identified one cell line, mutan...
journal_title：Journal of lipid research
pub_type： 杂志文章
doi：
更新日期：1997-10-01 00:00:00
abstract：:Sulfoquinovosyl diglyceride from plant tissues is recovered in sizeable quantities, free from phospholipids and galactolipids. ...
journal_title：Journal of lipid research
pub_type： 杂志文章
doi：
更新日期：1966-07-01 00:00:00
abstract：:Palmitoleic acid is a minor monounsaturated fatty acid in the human diet and in blood plasma. Because macadamia oil is at least one potentially large source of palmitoleic acid, we tested its effect on plasma lipid levels against two other dietary fatty acids, oleic acid and palmitic acid. The dietary adjustments, thr...
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：:Serine palmitoyltransferase (SPT) catalyzes the rate-limiting step of condensation of L-serine and palmitoyl-CoA to form 3-ketodihydrosphingosine (3KDS). Here, we report a HPLC-ESI-MS/MS method to directly quantify 3KDS generated by SPT. With this technique, we were able to detect 3KDS at a level comparable to that of...
journal_title：Journal of lipid research
pub_type： 杂志文章
doi：10.1194/jlr.D078535
更新日期：2018-01-01 00:00:00
abstract：:Recent studies suggest that 7-dehydrocholesterol (7-DHC)-derived oxysterols play important roles in the pathophysiology of Smith-Lemli-Opitz syndrome (SLOS), a metabolic disorder that is caused by defective 3β-hydroxysterol-Δ(7)-reductase (DHCR7). Although 14 oxysterols have been identified as the primary products of ...
journal_title：Journal of lipid research
pub_type： 杂志文章
doi：10.1194/jlr.M035733
更新日期：2013-04-01 00:00:00
abstract：:Human apolipoprotein C-I (apoC-I) is an exchangeable apolipoprotein that binds to lipoprotein particles in vivo. In this study, we employed a LC-MS/MS assay to demonstrate that residues 38-51 of apoC-I are significantly protected from proteolysis in the presence of 1,2-dimyristoyl-3-sn-glycero-phosphocholine (DMPC). T...
journal_title：Journal of lipid research
pub_type： 杂志文章
doi：10.1194/jlr.M800529-JLR200
更新日期：2009-07-01 00:00:00
abstract：:An elevated plasma concentration of lipoprotein (a) [Lp(a)] is an independent risk factor for cardiovascular disease. Life style modification and currently available drugs either fail to effectively lower plasma Lp(a) levels or do not result in clinical benefit. However, lipoprotein apheresis is very efficient in decr...
journal_title：Journal of lipid research
pub_type： 杂志文章,评审
doi：10.1194/jlr.R056549
更新日期：2016-10-01 00:00:00
abstract：:We report a new genetic defect in the lecithin:cholesterol acyltransferase (LCAT) gene associated with classical clinical and biochemical features of fish eye disease. The 63-year-old Australian female proband also suffers from non-insulin-dependent (type II) diabetes mellitus. She presented with corneal opacities, ma...
journal_title：Journal of lipid research
pub_type： 杂志文章
doi：
更新日期：1996-01-01 00:00:00
abstract：:Gel-permeation chromatography on Sephadex LH-20, using ethanol as eluent, permits the resolution of neutral hydroxy lipids according to molecular size. The influence of molecular shape, functional groups, chain lengths, and degree of unsaturation, as well as the effect of the eluent on the elution pattern are discusse...
journal_title：Journal of lipid research
pub_type： 杂志文章
doi：
更新日期：1970-03-01 00:00:00
abstract：:Lysophospholipid (LP) research has experienced a period of renaissance with the discovery of the lysophosphatidic acid (LPA) and sphingosine 1-phosphate (S1P) receptors in the late 1990s. Vertebrate LP receptors regulate embryogenesis, vascular development, neurogenesis, uterine development, oocyte survival, immune ce...
journal_title：Journal of lipid research
pub_type： 杂志文章,评审
doi：10.1194/jlr.R800047-JLR200
更新日期：2009-04-01 00:00:00
