Author(s)

Alain N’Guessan^1,2*, Armand Koffi², Ismaël L. Dally², Christophe N’Cho Amin², Claire Gueutin¹, Nicolas Tsapis¹, Elias Fattal¹

¹Institute Galien Paris-Sud, Paris-Sud University, Orsay, France.
²School of Pharmacy, University Félix Houphouet-Boigny, Abidjan, Côte d’Ivoire.

A high-performance liquid chromatography (HPLC) method has been developed and validated for the determination of dexamethasone palmitate (DXP) in bronchoalveolar fluid lavage samples (BALF). DXP in rat BALFs containing the internal standard (IS), testosterone decanoate (TD), was extracted using a mixture of chloroform and methanol (9:1, v/v). Extracts were then centrifuged, dried and dissolved in acetonitrile. A chromatographic separation based on an isocratic elution was done using acetonitrile and water (85:15, v/v) as a mobile phase at a flow rate of 1.2 mL/min. The graph of the developed method was linear within the tested calibration range of 0.5 - 40 μg/mL. The overall extraction recovery of DXP from BALF samples was 84.3% ± 1.6%. The accuracy (relative error) and precision (coefficient of variation) values were within the pre-defined limits of ≤15% at all concentrations. This methodology has been applied to determine levels of DXP in BALF samples collected from rats treated with DXP large porous particles. The measured concentrations were successfully evaluated using a non-compartment pharmacokinetic model. Since the developed method requires only a microvolume (100 μL) of BALF sample for analysis, it is therefore particularly suitable for the evaluation of drug biodistribution in lung.

Dexamethasone Palmitate, Bronchoalveolar Lavage Fluid, HPLC

N’Guessan, A. , Koffi, A. , Dally, I. , Amin, C. , Gueutin, C. , Tsapis, N. and Fattal, E. (2019) HPLC Quantification of Dexamethasone Palmitate in Bronchoalveolar Lavage Fluid of Rat after Lung Delivery with Large Porous Particles. American Journal of Analytical Chemistry, 10, 404-414. doi: 10.4236/ajac.2019.109028.