Background: Polypharmacy is a common practice in schizophrenia. Consequently, therapeutic drug monitoring is usually adopted to maintain the concentrations of the drugs in the plasma within a targeted therapeutic range, to maximize therapeutic efficiency and to diminish adverse side effects.
Methodology: This study reports on a column switching UHPLC-MS/MS method to determine psychotropic drugs in plasma samples simultaneously.
Results: The method was linear from 0.025 to 1.25 ng ml with R above 0.9950 and the lack of fit test (p > 0.05). The precision values presented coefficients of variation lower than 12%, and the relative standard error of the accuracy were lower than 14%.
Conclusion: The column switching UHPLC-MS/MS method developed herein successfully determined drugs in schizophrenic patients' plasma samples for therapeutic drug monitoring.
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http://dx.doi.org/10.4155/bio-2016-0301 | DOI Listing |
Tetrahedron
February 2025
Department of Chemistry, Western Washington University, Bellingham, WA 98225 (USA).
Beta-hydroxy ketones can be reduced using a sequence of ruthenium-catalyzed silyl etherification followed by tetrabutylammonium fluoride (TBAF) promoted intramolecular hydrosilylation. Switching from TBAF to tetrabutylammonium difluorotriphenylsilicate (TBAT), even without first forming the silyl ether, gave cyclic dioxasilinane products. These somewhat sensitive compounds could be isolated pure by column chromatography using florisil as the stationary phase.
View Article and Find Full Text PDFJ Pharm Biomed Anal
January 2025
Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou 221004, China; Department of Pharmacy, Suining People's Hospital Affiliated to Xuzhou Medical University, Suining 221202, China; Department of Pharmaceutical Analysis, Xuzhou Medical University, Xuzhou 221204, China. Electronic address:
Currently, treatment with antiepileptic drugs (AEDs) is still the first choice for epileptic patients, while monitoring their blood concentrations is undoubtedly beneficial for minimizing their adverse side effects and optimizing their therapeutic effects. In this study, an ultra-high performance liquid chromatography coupled with tandem mass spectrometry with polarity switching was developed and validated for simultaneous determination of 14 AEDs and 2 active metabolites in human serum. Olanzapine was selected as the internal standard.
View Article and Find Full Text PDFFront Pharmacol
December 2024
Qinghai-Tibetan Plateau Ethnic Medicinal Resources Protection and Utilization Key Laboratory of National Ethnic Affairs Commission of the People's Republic of China, Southwest Minzu University, Chengdu, China.
J Pharm Biomed Anal
December 2024
Analytical Research & Development, Merck & Co., Inc., Rahway, NJ 07065, USA.
Antibody-drug conjugates (ADCs) represent a significant advancement in targeted cancer therapy, offering the potential to selectively deliver cytotoxic drugs to tumor cells while minimizing systemic toxicity. However, the structural complexity of ADCs, particularly those conjugated through cysteine residues, poses significant analytical challenges. Due to the hydrophobicity of ADCs, Hydrophobic interaction chromatography (HIC) is often the method of choice to analyze the drug-to-antibody ratio (DAR).
View Article and Find Full Text PDFNat Commun
December 2024
Chair of Biological Chemistry, School of Life Sciences, Technical University of Munich, 85354, Freising, Germany.
Affinity chromatography is the method of choice for the rapid purification of proteins from cell extracts or culture supernatants. Here, we present the light-responsive Azo-tag, a short peptide comprising p-(phenylazo)-L-phenylalanine (Pap), whose side chain can be switched from its trans-ground state to the metastable cis-configuration by irradiation with mild UV light. Since only trans-Pap shows strong affinity to α-cyclodextrin (α-CD), a protein exhibiting the Azo-tag selectively binds to an α-CD chromatography matrix under daylight or in the dark but elutes quickly under physiological buffer flow when illuminating the column at 355 nm.
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