Abstract:
:Native interactions between lysophospholipids (LPs) and their cognate LP receptors are difficult to measure because of lipophilicity and/or the adhesive properties of lipids, which contribute to high levels of nonspecific binding in cell membrane preparations. Here, we report development of a free-solution assay (FSA) where label-free LPs bind to their cognate G protein-coupled receptors (GPCRs), combined with a recently reported compensated interferometric reader (CIR) to quantify native binding interactions between receptors and ligands. As a test case, the binding parameters between lysophosphatidic acid (LPA) receptor 1 (LPA1; one of six cognate LPA GPCRs) and LPA were determined. FSA-CIR detected specific binding through the simultaneous real-time comparison of bound versus unbound species by measuring the change in the solution dipole moment produced by binding-induced conformational and/or hydration changes. FSA-CIR identified KD values for chemically distinct LPA species binding to human LPA1 and required only a few nanograms of protein: 1-oleoyl (18:1; KD = 2.08 ± 1.32 nM), 1-linoleoyl (18:2; KD = 2.83 ± 1.64 nM), 1-arachidonoyl (20:4; KD = 2.59 ± 0.481 nM), and 1-palmitoyl (16:0; KD = 1.69 ± 0.1 nM) LPA. These KD values compared favorably to those obtained using the previous generation back-scattering interferometry system, a chip-based technique with low-throughput and temperature sensitivity. In conclusion, FSA-CIR offers a new increased-throughput approach to assess quantitatively label-free lipid ligand-receptor binding, including nonactivating antagonist binding, under near-native conditions.
journal_name
J Lipid Resjournal_title
Journal of lipid researchauthors
Ray M,Nagai K,Kihara Y,Kussrow A,Kammer MN,Frantz A,Bornhop DJ,Chun Jdoi
10.1194/jlr.D120000880subject
Has Abstractpub_date
2020-08-01 00:00:00pages
1244-1251issue
8eissn
0022-2275issn
1539-7262pii
jlr.D120000880journal_volume
61pub_type
杂志文章abstract::The storage of lipids in the form of triglycerides (TGs) and the de novo synthesis (lipogenesis) of fatty acids from nonlipid precursors [de novo lipogenesis (DNL)] are important functions of adipose tissue (AT) that influence whole-body metabolism. Yet, few studies have reported in vivo estimates of adipose lipid kin...
journal_title:Journal of lipid research
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journal_title:Journal of lipid research
pub_type: 杂志文章
doi:
更新日期:1976-01-01 00:00:00
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journal_title:Journal of lipid research
pub_type: 杂志文章
doi:10.1194/jlr.M600178-JLR200
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abstract::This report describes the isolation of sarcosylsarcosine conjugate of ursodeoxycholic acid (UDCA) formed during the synthesis of sarcoUDCA by the mixed anhydride method. The compound was characterized by its chemical ionization mass spectrum. The diamino acid conjugate was formed only when the free amino acid was used...
journal_title:Journal of lipid research
pub_type: 杂志文章
doi:
更新日期:1989-05-01 00:00:00
abstract::Previous studies from our laboratory have shown that oral administration of stigmastanyl-phosphocholine (Ro 16-6532) reduces plasma cholesterol levels in experimental animals on diets free of added cholesterol. In the present study, effects of Ro 16-6532 and lovastatin on lipoprotein levels and metabolism were investi...
journal_title:Journal of lipid research
pub_type: 杂志文章
doi:
更新日期:1995-07-01 00:00:00
abstract::Two assays for the quantitative measurement of HMG-CoA reductase, the major regulatory enzyme in hepatic cholesterol biosynthesis, are described. The first of these procedures employs thin-layer chromatography (TLC) of the reaction product on plastic-backed silica gel G strips impregnated with ammonium carbonate. The ...
journal_title:Journal of lipid research
pub_type: 杂志文章
doi:
更新日期:1977-05-01 00:00:00
abstract::The percentage of saturated cholesteryl esters (CEs) synthesized by human LCAT is several times higher than expected from the sn-2 acyl composition of plasma phosphatidylcholine (PC), whereas the synthesis of 20:4 CE and 22:6 CE is much lower than expected. To explain these discrepancies, we proposed that LCAT transfe...
journal_title:Journal of lipid research
pub_type: 杂志文章
doi:10.1194/jlr.M400197-JLR200
更新日期:2004-12-01 00:00:00
abstract::Biliary secretion of bile acid glucuronides was studied in control rats and in rats with a congenital defect in hepatobiliary transport of organic anions (GY rats). In control animals, hepatobiliary transport of [3H]lithocholic acid 3-O-glucuronide and [3H]cholic acid 3-O-glucuronide was efficient (greater than 95% in...
journal_title:Journal of lipid research
pub_type: 杂志文章
doi:
更新日期:1989-12-01 00:00:00
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journal_title:Journal of lipid research
pub_type: 杂志文章
doi:
更新日期:1990-12-01 00:00:00
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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:
更新日期:1966-07-01 00:00:00
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journal_title:Journal of lipid research
pub_type: 杂志文章,评审
doi:10.1194/jlr.R700005-JLR200
更新日期:2007-06-01 00:00:00
abstract::In mammals, the apolipoprotein (apo) A-I gene is expressed predominantly in liver and intestine, while in avian species it is expressed in all tissues. Although liver and intestine are the major sites of chicken apoA-I mRNA synthesis, there are appreciable amounts of apoA-I mRNA in kidney, ovary/testes, brain, lung, s...
journal_title:Journal of lipid research
pub_type: 杂志文章
doi:
更新日期:1992-06-01 00:00:00
abstract::Expression of bile salt export pump (BSEP) is regulated by the bile acid/farnesoid X receptor (FXR) signaling pathway. Two FXR isoforms, FXRα1 and FXRα2, are predominantly expressed in human liver. We previously showed that human BSEP was isoform-dependently regulated by FXR and diminished with altered expression of F...
journal_title:Journal of lipid research
pub_type: 杂志文章
doi:10.1194/jlr.M038323
更新日期:2013-11-01 00:00:00
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journal_title:Journal of lipid research
pub_type: 杂志文章
doi:
更新日期:1967-05-01 00:00:00
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journal_title:Journal of lipid research
pub_type: 杂志文章
doi:
更新日期:1985-04-01 00:00:00
abstract::The activity of lipoprotein lipase isolated from rat postheparin plasma has been determined with synthetic lipids, in the presence and absence of apoprotein of the natural substrate very low density lipoprotein, as a function of medium ion-pair concentration of a number of different inorganic salts. The several kineti...
journal_title:Journal of lipid research
pub_type: 杂志文章
doi:
更新日期:1976-05-01 00:00:00
abstract::The effect of inhibiting lysosomal protein degradation on the activity of 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase was determined using a mouse mammary cell line (TS-85) which expresses a temperature-sensitive mutation in the ubiquitin degradative pathway. Incubating cells for 18 hr in medium containi...
journal_title:Journal of lipid research
pub_type: 杂志文章
doi:
更新日期:1986-03-01 00:00:00
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journal_title:Journal of lipid research
pub_type: 杂志文章
doi:10.1194/jlr.M300453-JLR200
更新日期:2004-04-01 00:00:00
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journal_title:Journal of lipid research
pub_type: 杂志文章
doi:
更新日期:1975-03-01 00:00:00
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journal_title:Journal of lipid research
pub_type: 杂志文章
doi:
更新日期:1989-05-01 00:00:00
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journal_title:Journal of lipid research
pub_type: 杂志文章
doi:10.1194/jlr.M021733
更新日期:2012-04-01 00:00:00
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journal_title:Journal of lipid research
pub_type: 杂志文章
doi:10.1194/jlr.M038307
更新日期:2013-08-01 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::We have recently reported that the human apolipoprotein A-I (apoA-I) and apolipoprotein C-III (apoC-III) genes are physically linked and that the presence of a DNA insertion in the apoA-I gene is correlated with apoA-I-apoC-III deficiency in patients with premature atherosclerosis. In addition, the presence of a polym...
journal_title:Journal of lipid research
pub_type: 杂志文章
doi:
更新日期:1985-04-01 00:00:00
abstract::Fatty acids (FA) that are utilized for triglyceride (TG) synthesis in the liver and principally from two sources: FA synthesized de novo in the liver and preformed FA. We have measured the contribution from the two sources to very low density lipoprotein (VLDL) TG synthesis individually for palmitate, oleate, stearate...
journal_title:Journal of lipid research
pub_type: 杂志文章
doi:
更新日期:1998-06-01 00:00:00
abstract::Membrane-protein interaction plays key roles in a wide variety of biological processes. Although various methods have been employed to measure membrane binding of soluble proteins, a robust high-throughput assay that is universally applicable to all proteins is lacking at present. Here we report a new fluorescence que...
journal_title:Journal of lipid research
pub_type: 杂志文章
doi:10.1194/jlr.D041376
更新日期:2013-12-01 00:00:00
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journal_title:Journal of lipid research
pub_type: 临床试验,杂志文章
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更新日期:2004-10-01 00:00:00
abstract::To study the mechanisms of hepatic HDL formation, we investigated the roles of ABCA1, ABCG1, and SR-BI in nascent HDL formation in primary hepatocytes isolated from mice deficient in ABCA1, ABCG1, or SR-BI and from wild-type (WT) mice. Under basal conditions, in WT hepatocytes, cholesterol efflux to exogenous apoA-I w...
journal_title:Journal of lipid research
pub_type: 杂志文章
doi:10.1194/jlr.M017079
更新日期:2012-03-01 00:00:00