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Articles by Alan T. Remaley
Total Records ( 2 ) for Alan T. Remaley
  Michael H. Davidson , Christie M. Ballantyne , Terry A. Jacobson , Vera A. Bittner , Lynne T. Braun , Alan S. Brown , W. Virgil Brown , William C. Cromwell , Ronald B. Goldberg , James M. McKenney , Alan T. Remaley , Allan D. Sniderman , Peter P. Toth , Sotirios Tsimikas , Paul E. Ziajka , Kevin C. Maki and Mary R. Dicklin
  The National Cholesterol Education Program Adult Treatment Panel guidelines have established low-density lipoprotein cholesterol (LDL-C) treatment goals, and secondary non-high-density lipoprotein (HDL)-C treatment goals for persons with hypertriglyceridemia. The use of lipid-lowering therapies, particularly statins, to achieve these goals has reduced cardiovascular disease (CVD) morbidity and mortality; however, significant residual risk for events remains. This, combined with the rising prevalence of obesity, which has shifted the risk profile of the population toward patients in whom LDL-C is less predictive of CVD events (metabolic syndrome, low HDL-C, elevated triglycerides), has increased interest in the clinical use of inflammatory and lipid biomarker assessments. Furthermore, the cost effectiveness of pharmacological intervention for both the initiation of therapy and the intensification of therapy has been enhanced by the availability of a variety of generic statins. This report describes the consensus view of an expert panel convened by the National Lipid Association to evaluate the use of selected biomarkers [C-reactive protein, lipoprotein-associated phospholipase A2, apolipoprotein B, LDL particle concentration, lipoprotein(a), and LDL and HDL subfractions] to improve risk assessment, or to adjust therapy. These panel recommendations are intended to provide practical advice to clinicians who wrestle with the challenges of identifying the patients who are most likely to benefit from therapy, or intensification of therapy, to provide the optimum protection from CV risk.
  Amar A. Sethi , John A. Stonik , Fairwell Thomas , Steve J. Demosky , Marcelo Amar , Edward Neufeld , H. Bryan Brewer , W. Sean Davidson , Wilissa D`Souza , Dmitri Sviridov and Alan T. Remaley
  ApoA-I contains a tandem array of amphipathic helices with varying lipid affinity, which are critical in its ability to bind and remove lipids from cells by the ABCA1 transporter. In this study, the effect of asymmetry in the lipid affinity of amphipathic helices in a bihelical apoA-I mimetic peptide, 37pA, on lipid efflux by the ABCA1 transporter was examined. Seven peptide variants of 37pA were produced by substituting a varying number of hydrophobic amino acids for alanine on either one or both helices. The 5A peptide with five alanine substitutions in the second helix had decreased helical content compared with 37pA (5A, 12 ± 1% helicity; 37pA, 28 ± 2% helicity) and showed less self-association but, similar to the parent peptide, was able to readily solubilize phospholipid vesicles. Furthermore, 5A, unlike the parent peptide 37pA, was not hemolytic (37pA, 27 ± 2% RBC lysis, 2 h, 18 µM). Finally, the 5A peptide stimulated cholesterol and phospholipid efflux by the ABCA1 transporter with higher specificity (ABCA1-transfected versus untransfected cells) than 37pA (5A, 9.7 ± 0.77%, 18 h, 18 µM versus 1.5 ± 0.27%, 18 h, 18 µM (p < 0.0001); 37pA, 7.4 ± 0.85%, 18 h, 18µM versus 5.8 ± 0.20%, 18 h, 18µM (p = 0.03)). In summary, we describe a novel bihelical peptide with asymmetry in the lipid affinity of its helices and properties similar to apoA-I in terms of specificity for cholesterol efflux by the ABCA1 transporter and low cytotoxicity.
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