Open Access<p>Simultaneous Determination of Parecoxib and Its Metabolite Valdecoxib Concentrations in Beagle Plasma by UPLC-MS/MS and Application for Pharmacokinetics Study</p>
Author(s) -
Shuang-long Li,
Yongliang Zhu,
Congmin Zhu,
Shaobin Li,
Zi-heng Li,
Xiangjun Qiu
Publication year - 2020
Publication title -
drug design, development and therapy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.964
H-Index - 64
ISSN - 1177-8881
DOI - 10.2147/dddt.s226349
Subject(s) - valdecoxib , beagle , pharmacokinetics , metabolite , chemistry , active metabolite , plasma concentration , chromatography , pharmacology , high performance liquid chromatography , medicine , biochemistry , cyclooxygenase , rofecoxib , enzyme
A method for the simultaneous determination of parecoxib and its metabolite valdecoxib in beagle plasma by UPLC-MS/MS was developed and validated. After the plasma was extracted by acetonitrile precipitation, the analytes were separated on an Acquity UPLC BEH C18 column (2.1 mm × 50 mm, 1.7 μm) using acetonitrile-formic acid as the mobile phase in gradient mode. The analytes were monitored by multiple reaction monitoring (MRM) in electrospray negative ion mode. The mass transfer pairs were m/z 368.97→119.01 for parecoxib, m/z 312.89→118.02 for valdecoxib, and m/z 379.98→316.02 for celecoxib (internal standard, IS). The correlation coefficients of parecoxib and valdecoxib ranged from 5 to 4000 ng/mL were greater than 0.9998. The recovery of parecoxib and valdecoxib was greater than 82.54%. The inter- and intra-day precision RSD values were 1.36~3.65% and 2.28~5.91%, respectively. The accuracy of RE values were -1.38%~1.96%. Finally, the matrix effect (ME) and stability were also within acceptable criteria. This method had been successfully applied to the pharmacokinetics of parecoxib and valdecoxib in beagle plasma after injection of parecoxib (1.33 mg/kg, intramuscular injection).