Background: Drugs may potentially adsorb to blood collection tubes containing gel separators in the preanalytical phase of therapeutic drug monitoring. The aim of this study was to compare measured concentrations of 28 psychoactive drugs and 13 metabolites in spiked serum samples stored on standard (plain) tubes versus barrier gel tubes during a 2-6-day period at room temperature.
Methods: Drug-free ("blank") serum samples spiked with mixes of antidepressants, antipsychotics, or mood stabilizers (valproic acid and lamotrigine), including relevant metabolites, were transferred to tubes with and without gel, that is, BD Vacutainer SST II Advance gel tubes and BD Vacutainer Glass Serum Tubes (Becton-Dickinson Company, Plymouth, United Kingdom). Mean serum concentrations of the drugs or metabolites measured by ultra-high performance liquid chromatography-tandem mass spectrometry analyses of protein-precipitated samples were compared after storage on plain or gel tubes at 3 time points (day 0, day 2/48 hours, and day 6/144 hours) in room temperature.
Results: Mean serum concentrations of all antidepressants, except for one metabolite, and 13 of 18 antipsychotic drugs were significantly lower in gel tubes compared with plain tubes after 2 days of storage (2%-28% lower, P < 0.05). After 6 days of storage, mean serum concentrations of all antipsychotic drugs and antidepressants were significantly lower in gel tubes versus plain tubes (9%-49% lower, P < 0.02), except for amisulpride and O-desmethylvenlafaxine. Serum concentrations of the mood stabilizers were not significantly different in gel tubes compared with plain tubes (P > 0.1). There was a clear relationship between log P (partition coefficient) and residual serum concentrations during gel tube storage (r -0.50 and -0.42 at day 2 and day 6, respectively; P < 0.02).
Conclusions: This study shows that storage on gel for more than 2 days significantly decreases the serum concentrations of antidepressant and antipsychotic drugs as compared to storage in plain tubes. Thus, using tubes with gel separators in the therapeutic drug monitoring of psychoactive drugs should be reconsidered.
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http://dx.doi.org/10.1097/FTD.0000000000000592 | DOI Listing |
Medicine (Baltimore)
January 2025
Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, People's Republic of China.
This study explores the relationship between 25-hydroxyvitamin D/calcium/alkaline phosphatase (ALP) levels and kidney stone development via cross-sectional and Mendelian randomization (MR) analyses. We used data from the National Health and Nutrition Examination Survey (NHANES) 2013 to 2018 to explore the associations of 25(OH)D metabolite, calcium, and ALP levels with kidney stone development, LDSC analysis to determine the associations between their genetically predicted levels and kidney stone development, and MR analysis to determine the causality of those relationship via genome-wide association studies (GWASs). The cross-sectional study revealed a relationship between ALP levels and kidney stone development (Model 1: OR = 1.
View Article and Find Full Text PDFPLoS One
January 2025
Department of Nutritional Physiology, National Institute of Medical and Nutritional Sciences "Salvador Zubirán", Mexico City, Mexico.
Childhood obesity increases the risk of developing metabolic diseases in adulthood, since environmental stimuli during critical windows of development can impact on adult metabolic health. Studies demonstrating the effect of prepubertal diet on adult metabolic disease risk are still limited. We hypothesized that a prepubertal control diet (CD) protects the adult metabolic phenotype from diet-induced obesity (DIO), while a high-fat diet (HFD) would predispose to adult metabolic alterations.
View Article and Find Full Text PDFFASEB J
January 2025
Department of Neurosurgery, Ningbo Key Laboratory of Nervous System and Brain Function, The First Affiliated Hospital of Ningbo University, Ningbo, Zhejiang, China.
Inflammation is a crucial factor in intracerebral hemorrhage (ICH) pathophysiology, but specific inflammatory biomarkers in ICH patients remain unclear. This study aimed to identify novel circulating inflammatory biomarkers for improved ICH prediction and diagnosis. We profiled expression levels of 92 cardiovascular disease related proteins in plasma from 26 matched ICH patients and controls using Olink technology.
View Article and Find Full Text PDFJ Clin Pharmacol
January 2025
Eisai Inc., Nutley, NJ, USA.
The first-in-human, Phase 1 Study 101 showed antitumor activity and a tolerable safety profile of farletuzumab ecteribulin in Japanese patients with platinum-resistant ovarian and non-small cell lung cancer. A pharmacometric assessment evaluated farletuzumab ecteribulin pharmacokinetics and exposure-response (E-R) relationships for efficacy and safety to support dose optimization. Patients received 0.
View Article and Find Full Text PDFAlcohol Clin Exp Res (Hoboken)
January 2025
Division of Gastroenterology, Hepatology and Nutrition, Department of Medicine, University of Louisville, Louisville, Kentucky, USA.
Background: Our previous study demonstrated that alcohol induced the expression of the α4 subunit of nicotinic acetylcholine receptors (nAChRs) in the livers of wild type mice (WT), and that whole-body α4 nAChR knockout mice (α4KO) showed protection against alcohol-induced steatosis, inflammation, and injury. Based on these findings, we hypothesized that hepatocyte-specific α4 nAChRs may directly contribute to the detrimental effects of alcohol on the liver.
Methods: Hepatocyte-specific α4 knockout mice (α4HepKO) were generated, and the absence of α4 nAChR was confirmed through PCR of genomic DNA.
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