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KMID : 1038020220300020099
Translational and Clinical Pharmacology
2022 Volume.30 No. 2 p.99 ~ p.111
Bioanalytical methods for the detection of duloxetine and thioctic acid in plasma using ultra performance liquid chromatography with tandem mass spectrometry (UPLC-MS/MS)
Wei Zhuodu

Jeong Hyeon-Cheol
Kang Ye-Ji
Jang Jae-Sang
Kim Myoung-Hwan
Shin Kwang-Hee
Abstract
Duloxetine and thioctic acid (TA) are standard drugs for treating diabetic neuropathy, a primary complication associated with diabetes. In this study, ultra performance liquid chromatography coupled with tandem mass spectrometry methods was successfully developed and validated for quantifying duloxetine and TA in biological samples. The protein precipitation method was used to extract duloxetine, TA and their internal standards from beagle dog plasma. A Hypersil Gold C18 column (150 ¡¿ 2.1 mm, 1.9 ¥ìm) was used for the experiment. Isocratic elution with 0.1% formic acid in acetonitrile (A) and 0.1% formic acid (B) was used for duloxetine, whereas a gradient elution with 0.03% acetic acid (A) and acetonitrile (B) was used for TA. The validated parameters included linearity, sensitivity, accuracy, precision, selectivity, matrix effect, stability, and recovery under different conditions. The linear ranges of the calibration curves for duloxetine and TA were 5?800 ng/mL and 5?1,000 ng/mL, respectively. An intra- and inter-run precision of ¡¾ 15% can be observed in all quality control samples. These methods were successfully used for pharmacokinetics (PKs) studies in beagle dogs to compare PK differences in a fixed-dose combination including duloxetine and TA and co-administration of the 2 drugs.
KEYWORD
Duloxetine, Thioctic Acid, Liquid Chromatography, Mass Spectrometry
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