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Pharmaceutics 2010, 2(2), 171-181; doi:10.3390/pharmaceutics2020171
Article

Quantitative Determination of ABT-925 in Human Plasma by On-Line SPE and LC-MS/MS: Validation and Sample Analysis in Phase II Studies

* ,
 and
Abbott/100 Abbott Park Road, Abbott Park, IL 60064, USA
* Author to whom correspondence should be addressed.
Received: 6 April 2010 / Revised: 29 April 2010 / Accepted: 30 April 2010 / Published: 4 May 2010
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Abstract

A fully automated 96-well On-Line Solid Phase Extraction (SPE) followed by High Performance Liquid Chromatography (HPLC)-Tandem Mass Spectrometric (MS/MS) method for the determination of ABT-925 (2-{3-[4-(2-tert-Butyl-6-trifluoromethyl-pyrimidin-4-yl)-piperazin-1-yl)-propyl-sulfanyl}-3H-pyrimidin-4-one fumarate) in human plasma was developed, validated and utilized in Phase II clinical studies. 50 µL of plasma sample was fortified with internal standard (IS, d8-ABT-925) and extracted on-line with Cohesive Turbo Flow Cyclone P HTLC column. The chromatographic separation was performed on Aquasil C18 (3 μm 50 × 3 mm) HPLC column with a mobile phase consisting of 50/50/0.1 (v/v/v) ACN/H2O/formic acid. The mass spectrometric measurement was conducted under positive ion mode using multiple reaction monitoring (MRM) of m/z 457.4 → 329.4 for analyte and m/z 465.5 → 337.5 for IS.The peak area ratio (analyte/IS) was used to quantitate ABT-925. A dynamic range of 0.0102 μg/mL to 5.24 μg/mL was established after the validation. The validated method was then used for two Phase II studies. To demonstrate the method reproducibility, approximately 10% of the incurred samples from one study were repeated in singlet. The repeated values were compared to the initial values. All repeated values agreed within ±15% of the mean values.
Keywords: On-line SPE; LC-MS/MS; multiplexing for high throughput On-line SPE; LC-MS/MS; multiplexing for high throughput
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Wan, K.; Rieser, M.; El-Shourbagy, T. Quantitative Determination of ABT-925 in Human Plasma by On-Line SPE and LC-MS/MS: Validation and Sample Analysis in Phase II Studies. Pharmaceutics 2010, 2, 171-181.

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