Assessment of QT(c)-prolonging potential of BX471 in healthy volunteers. A 'thorough QT study' following ICH E14 using various QT(c) correction methods.

Aims: Within the framework of the clinical development of BX471, this study was intended to provide experience in conducting 'thorough QT(c) studies' according to ICH E14. A broad range of QT correction methods and analysis strategies was employed. METHODS A double-blind, placebo- and positive-controlled, single-centre, three-way cross-over study was conducted in 74 healthy volunteers.

Persistent T1 hypointensity as an MRI marker for treatment efficacy in multiple sclerosis.

Background: MRI is often used as primary outcome measure in phase II clinical trials in multiple sclerosis (MS). Since persistent T1 hypointense lesions are a surrogate parameter for axonal damage and demyelination, they may serve as a marker for monitoring the efficacy of neuroprotective drugs. At present, a power analysis using black hole (BH) evolution as primary outcome measure has not been performed.

A complex plasma plant sterol locus on mouse chromosome 14 has at least two genes regulating intestinal sterol absorption.

We previously identified two inbred mouse strains, C57BL/6J and CASA/Rk, with different plasma plant sterol levels. An intercross between these strains revealed a broad plasma plant sterol locus on chromosome 14, which peaked at 17 centimorgan (cM) with a maximum logarithm of the odds score of 9.9.

Inclusion of MPA and in a rapid multi-drug LC-tandem mass spectrometric method for simultaneous determination of immunosuppressants.

Background: [corrected] Mycophenolic Acid (MPA) is often co-prescribed as part of a multiple immunosuppressant drug regimen. In this study an established LC-MS/MS method for the measurement of immunosuppressants cyclosporine A, tacrolimus, sirolimus and everolimus was optimized to include MPA without changing the sample pre-treatment and the LC-MS/MS configuration.

Methods: The sample pretreatment for EDTA-plasma was used as for whole blood.

Standardized approach to proteome profiling of human serum based on magnetic bead separation and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry.

Background: Magnetic bead purification for the analysis of low-abundance proteins in body fluids facilitates the identification of potential new biomarkers by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS). The aims of our study were to establish a proteome fractionation technique and to validate a standardized blood sampling, processing, and storage procedure for proteomic pattern analysis.

Methods: We used magnetic bead separation for proteome profiling of human blood by MALDI-TOF MS (mass range, 1000-10,000 Da) and studied the effects on the quality and reproducibility of the proteome analysis of anticoagulants, blood clotting, time and temperature of sample storage, and the number of freeze-thaw cycles of samples.