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Showing 1 to 12 of 73 entries
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Influence of Oral Progesterone Administration on Drug-Induced QT Interval Lengthening: A Randomized, Double-Blind, Placebo-Controlled Crossover Study.

JACC. Clinical electrophysiology

Tisdale JE, Jaynes HA, Overholser BR, Sowinski KM, Flockhart DA, Kovacs RJ.
PMID: 28451647
JACC Clin Electrophysiol. 2016 Dec;2(7):765-774. doi: 10.1016/j.jacep.2016.02.015.

OBJECTIVES: We tested the hypothesis that oral progesterone administration attenuates drug-induced QT interval lengthening.BACKGROUND: Evidence from preclinical and human investigations suggests that higher serum progesterone concentrations may be protective against drug-induced QT interval lengthening.METHODS: In this prospective, double-blind, crossover...

Cytochrome P450 3A4*22, PPAR-α, and ARNT polymorphisms and clopidogrel response.

Clinical pharmacology : advances and applications

Kreutz RP, Owens J, Jin Y, Nystrom P, Desta Z, Kreutz Y, Breall JA, Li L, Chiang C, Kovacs RJ, Flockhart DA.
PMID: 24353446
Clin Pharmacol. 2013 Dec 09;5:185-92. doi: 10.2147/CPAA.S53151. eCollection 2013.

Recent candidate gene studies using a human liver bank and in vivo validation in healthy volunteers identified polymorphisms in cytochrome P450 (CYP) 3A4 gene (CYP3A4*22), Ah-receptor nuclear translocator (ARNT), and peroxisome proliferator-activated receptor-α (PPAR-α) genes that are associated with...

Two-axis bend measurement with Bragg gratings in multicore optical fiber.

Optics letters

Flockhart GM, MacPherson WN, Barton JS, Jones JD, Zhang L, Bennion I.
PMID: 12659255
Opt Lett. 2003 Mar 15;28(6):387-9. doi: 10.1364/ol.28.000387.

We describe what is to our knowledge the first use of fiber Bragg gratings written into three separate cores of a multicore fiber for two-axis curvature measurement. The gratings act as independent, but isothermal, fiber strain gauges for which...

Single isomer versus racemate: is there a difference? Clinical comparisons in allergy and gastroenterology.

CNS spectrums

Flockhart DA, Nelson HS.
PMID: 15131489
CNS Spectr. 2002 Apr;7(4):23-7. doi: 10.1017/s109285290002856x.

Many commonly prescribed drugs exist as a mixture of two distinct chiral isomer forms (enantiomers), each with its own unique chemistry, receptor affinity, and pharmacokinetic profile. Much is unknown concerning the clinical utility of these single enantiomers. This review...

Application of free-radical chromogens to determination of nitrite and nitrate ions by EPR spectrometry.

Talanta

Tsang EP, Burns DT, Flockhart BD.
PMID: 18965570
Talanta. 1992 Nov;39(11):1561-7. doi: 10.1016/0039-9140(92)80142-z.

Various azines and substituted phenylene diamines are oxidized by the nitrite ion to give stable radicals in an autocatalytic reaction. This finding has now been developed into highly sensitive methods for nitrite determination by EPR spectrometry. Thus, when the...

Influence of paraoxonase-1 Q192R and cytochrome P450 2C19 polymorphisms on clopidogrel response.

Clinical pharmacology : advances and applications

Kreutz RP, Nystrom P, Kreutz Y, Miao J, Desta Z, Breall JA, Li L, Chiang C, Kovacs R, Flockhart DA, Jin Y.
PMID: 22427735
Clin Pharmacol. 2012;4:13-20. doi: 10.2147/CPAA.S27822. Epub 2012 Feb 20.

BACKGROUND: The metabolic activation of clopidogrel is a two-step process. It has been suggested that paraoxonase-1 (PON1) is a rate-limiting enzyme in the conversion of 2-oxo- clopidogrel to an active thiol metabolite. Conflicting results have been reported in regard...

Measurement of a sign-changing two-gap superconducting phase in electron-doped Ba(Fe(1-x)Co(x))2As2 single crystals using scanning tunneling spectroscopy.

Physical review letters

Teague ML, Drayna GK, Lockhart GP, Cheng P, Shen B, Wen HH, Yeh NC.
PMID: 21405593
Phys Rev Lett. 2011 Feb 25;106(8):087004. doi: 10.1103/PhysRevLett.106.087004. Epub 2011 Feb 24.

Scanning tunneling spectroscopic studies of Ba(Fe(1-x)Co(x))(2)As(2) (x=0.06, 0.12) single crystals reveal direct evidence for predominantly two-gap superconductivity. These gaps decrease with increasing temperature and vanish above the superconducting transition T(c). The two-gap nature and the slightly doping- and energy-dependent...

Impact of the Interaction between 3'-UTR SNPs and microRNA on the Expression of Human Xenobiotic Metabolism Enzyme and Transporter Genes.

Frontiers in genetics

Wei R, Yang F, Urban TJ, Li L, Chalasani N, Flockhart DA, Liu W.
PMID: 23181071
Front Genet. 2012 Nov 21;3:248. doi: 10.3389/fgene.2012.00248. eCollection 2012.

Genetic variation in the expression of human xenobiotic metabolism enzymes and transporters (XMETs) leads to inter-individual variability in metabolism of therapeutic agents as well as differed susceptibility to various diseases. Recent expression quantitative traits loci (eQTL) mapping in a...

Barriers and facilitators to conduct high-quality, large-scale safety and comparative effectiveness research: The Biologics and Biosimilars Collective Intelligence Consortium experience.

Pharmacoepidemiology and drug safety

Lockhart CM, McDermott CL, Felix T, Lin ND, Cziraky MJ, Mendelsohn AB, Brown JS.
PMID: 31402533
Pharmacoepidemiol Drug Saf. 2020 Jul;29(7):811-813. doi: 10.1002/pds.4885. Epub 2019 Aug 11.

No abstract available.

When Two Pandemics Meet: Why Is Obesity Associated with Increased COVID-19 Mortality?.

Med (New York, N.Y.)

Lockhart SM, O'Rahilly S.
PMID: 32838359
Med (N Y). 2020 Dec 18;1(1):33-42. doi: 10.1016/j.medj.2020.06.005. Epub 2020 Jun 29.

A growing body of evidence indicates that obesity is strongly and independently associated with adverse outcomes of COVID-19, including death. By combining emerging knowledge of the pathological processes involved in COVID-19 with insights into the mechanisms underlying the adverse...

ACE inhibition and cardiometabolic risk factors, lung .

Royal Society open science

Gill D, Arvanitis M, Carter P, Hernández Cordero AI, Jo B, Karhunen V, Larsson SC, Li X, Lockhart SM, Mason A, Pashos E, Saha A, Tan VY, Zuber V, Bossé Y, Fahle S, Hao K, Jiang T, Joubert P, Lunt AC, Ouwehand WH, Roberts DJ, Timens W, van den Berge M, Watkins NA, Battle A, Butterworth AS, Danesh J, Di Angelantonio E, Engelhardt BE, Peters JE, Sin DD, Burgess S.
PMID: 33391794
R Soc Open Sci. 2020 Nov 18;7(11):200958. doi: 10.1098/rsos.200958. eCollection 2020 Nov.

Angiotensin-converting enzyme 2 (ACE2) and serine protease TMPRSS2 have been implicated in cell entry for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the virus responsible for coronavirus disease 2019 (COVID-19). The expression of

Methodologic considerations for noninterventional studies of switching from reference biologic to biosimilars.

Pharmacoepidemiology and drug safety

Desai RJ, Kim SC, Curtis JR, Bosco JLF, Eichelberger B, Barr CE, Lockhart CM, Bradbury BD, Clewell J, Cohen HP, Gagne JJ.
PMID: 31298463
Pharmacoepidemiol Drug Saf. 2020 Jul;29(7):757-769. doi: 10.1002/pds.4809. Epub 2019 Jul 12.

PURPOSE: As more biosimilars become available in the United States, postapproval noninterventional studies describing biosimilar switching and comparing effectiveness and/or safety between switchers and nonswitchers will play a key role in generating real-world evidence to inform clinical practices and...

Showing 1 to 12 of 73 entries