An optimal LC-MS/MS method for determination of azithromycin in white blood cells: application to pediatric samples

Legrand, Tiphaine, Elie, Valery, Kotecha, Sailesh ORCID: https://orcid.org/0000-0003-3535-7627, Junot, Christophe, Jacqz-Aigrain, Evelyne and Pruvost, Alain 2014. An optimal LC-MS/MS method for determination of azithromycin in white blood cells: application to pediatric samples. Bioanalysis 6 (17) , pp. 2317-2328. 10.4155/bio.14.81

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Abstract

Background: Studies suggest that particular antimicrobial and anti-inflammatory properties of azithromycin (AZM) can be related to its extensive accumulation in white blood cells (WBCs). However, available methods for determination of AZM in WBCs require large blood volumes unsuited to a pediatric context. Therefore, an LC-MS/MS method was developed for determination of AZM in WBCs. Results: WBCs were isolated from 500 µl of whole blood by lysing red blood cells. Then, lysis of WBCs was performed with methanol/buffer containing AZM-d3-13C as internal standard. After reversed phase LC, detection was performed under multiple reaction monitoring conditions in positive electrospray mode. Linearity ranged from 0.5 to 200 ng per WBC sample. Within-run and overall accuracy and precision ranged from 95.3 to 101.1% and from 1.6 to 4.7%, respectively. All validation parameters fulfilled international requirements. Conclusions: This method can be easily performed on small samples and provides reliable data, including in children and neonates.

Item Type:	Article
Date Type:	Published Online
Status:	Published
Schools:	Medicine
Subjects:	R Medicine > R Medicine (General)
Publisher:	Future Science
ISSN:	1757-6180
Last Modified:	31 Oct 2022 09:00
URI:	https://orca.cardiff.ac.uk/id/eprint/79486

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