Glyphosate, a widely used herbicide in global agriculture, poses potential health risks due to environmental and dietary exposure. This study evaluated urinary concentrations of glyphosate and its metabolite, amino-methyl phosphonic acid (AMPA), among farmers and non-farmers in Morocco's Fez-Meknes region, using liquid chromatography-tandem mass spectrometry. Glyphosate was detected in 57.
View Article and Find Full Text PDFProbe Electrospray Ionization (PESI) is an atmospheric pressure ionization method that can be directly coupled with a mass spectrometer to allow ultrafast analyses without chromatographic separation and with minimal sample preparation. Using the particular case of cocaine and its metabolites in human oral fluid, the main objective of the present study was to test the feasibility of a new hybrid system combining a PESI source and a quadrupole time-of-flight (QTOF). The best results were obtained for a sample preparation with a simple dilution of 100 µL of oral fluids in an ethanol / 10 mM ammonium formate buffer (50/50) and 10 µL deposited on a dedicated sample plate and introduced into the PESI source.
View Article and Find Full Text PDFUnited European Gastroenterol J
September 2024
Background: Knowledge about environmental pancreatic adenocarcinoma (PA) risk factors, including pesticide exposure, remains limited. Organochlorine (OC) accumulates in adipose tissue and can help reflect long-term exposure.
Patients And Methods: Age and body mass index (BMI) of patients with PA were matched with those undergoing a surgery for a benign disease on age and BMI (1:1).
Environmental exposure to endocrine disruptors, such as pesticides, could contribute to a decline of human fertility. Glyphosate (GLY) is the main component of Glyphosate Based Herbicides (GBHs), which are the most commonly herbicides used in the world. Various animal model studies demonstrated its reprotoxicity.
View Article and Find Full Text PDFBackground: Legally prescribed benzodiazepines (BZDs) and designer BZDs are widely misused and must be determined in multiple contexts (eg, overdose, drug-facilitated sexual assaults, or driving under the influence of drugs). This study aimed to develop a method for measuring serum BZD levels using probe electrospray ionization (PESI) mass spectrometry and an isotope dilution approach.
Methods: A tandem mass spectrometer equipped with a probe electrospray ionization source in multiple reaction monitoring mode was used.
Introduction: Hexahydrocannabinol is a hexahydro derivative of cannabinol. Poisoning with hexahydrocannabinol was first observed in Europe in May 2022.
Method: This is a retrospective observational study of cases of self-reported hexahydrocannabinol exposure reported to French poison centres between 1 January 2022 and 31 May 2023.
Early and sensitive biomarkers of liver dysfunction and drug-induced liver injury (DILI) are still needed, both for patient care and drug development. We developed the Serum Enhanced Binding (SEB) test to reveal post-transcriptional modifications (PTMs) of human serum albumin resulting from hepatocyte dysfunctions and further evaluated its performance in an animal model. The SEB test consists in spiking serum ex-vivo with ligands having specific binding sites related to the most relevant albumin PTMs and measuring their unbound fraction.
View Article and Find Full Text PDFWell-characterized biomarkers using reliable quantitative methods are essential for the management of various pathologies such as diabetes, kidney, and liver diseases. Human serum albumin (HSA) isoforms are gaining interest as biomarkers of advanced liver pathologies. In view of the structural alterations observed for HSA, insights into its isoforms are required to establish them as reliable biomarkers.
View Article and Find Full Text PDFJ Chromatogr B Analyt Technol Biomed Life Sci
November 2023
Chlordecone is an organochlorine insecticide that has been used intensively from 1973 to 1993 in the French West Indies banana fields to control root borers. This use has resulted in persistent pollution of soils and waters, and people have been and are still exposed mainly through food. Epidemiological studies showed that this exposure is associated with health disorders, including prostate cancer, prematurity, cognitive or motor development.
View Article and Find Full Text PDFHuman Serum Albumin (HSA) undergoes Post-Translational-Modifications (PTMs) leading to isoforms affecting its oncotic and non-oncotic properties. HSA is comprised of several isoforms whose abundance may vary with pathologies such as diabetes, kidney and liver diseases. Studying their impact separately may help to understand their sources and potential pathogenicity and further their evaluation as biomarkers.
View Article and Find Full Text PDFJ Chromatogr B Analyt Technol Biomed Life Sci
May 2023
The posttranslational modifications (PTM) of human serum albumin (HSA) can result in the development of isoforms that have been identified as potential biomarkers for advanced hepatic diseases. However, previous approaches using top-down (TD) analysis to identify isoforms based on molecular weight may have resulted in misidentifications. The nature of the identified isoforms has never been confirmed in previous works.
View Article and Find Full Text PDFJ Chromatogr B Analyt Technol Biomed Life Sci
May 2023
Volumetric microsampling devices have been developed for home-based capillary blood sampling and are now increasingly proposed for the therapeutic drug monitoring (TDM) of immunosuppressive drugs. Our objective was to validate a LC-MS/MS method for tacrolimus quantification based on both a manual and an automated extraction of dried blood spots (DBS) collected with a volumetric microsampling device. DBS collection was performed by placing a drop of whole blood (WB) pre-spiked with tacrolimus onto a sealing film and placing the hemaPEN® device (Trajan Scientific and Medical, Melbourne, Australia) into the drop according to the device specifications.
View Article and Find Full Text PDFIntroduction: Internal standardization is a common tool used in inductively coupled plasma - mass spectrometry (ICP-MS) analysis in order to reduce matrix effects, and thus improve the reliability and the robustness of results. However, its efficacy relies on the choice of a proper internal standard (IS) which, ideally, undergoes the same signal variations as the analyte. Thus far, IS selection has mainly relied on the proximity of atomic mass between the analyte and the internal standard.
View Article and Find Full Text PDFPurpose: Although designer benzodiazepines (DBZDs) constitute a minor part of new psychoactive substances, they deserve the greatest attention because of their popularity among drug users and increasing number and availability. This review covers the effects of different DBZDs, available pharmacological evaluation tools, and their reported toxicity and potential pharmacodynamic and pharmacokinetic interactions with other drugs commonly co-abused with DBZDs.
Methods: For this narrative review, a nonsystematic search was performed on PubMed, EMBASE, Google Scholar, and PubMed Central databases between June and July 2021.
Multiparametric toxicology research is mainly based on immunochromatography [IC] and chromatography methods. A new automated method using an immunoenzymatic (IE) assay based on a biochip array technology combines short turning around time and analytical performances close to chromatography in terms of positivity cut-off. The aim of our study was to compare IE versus IC and chromatography methods using urines samples from clinical cases.
View Article and Find Full Text PDFObjectives: Due to the increased prevalence of obesity in the world, bariatric surgeries are on the rise and necessitate life-long surveillance for deficiencies; hence the recommended vitamin supplementation in these patients. However, inadequate multivitamin supplementation may induce vitamin B6 overload.
Methods: We reviewed all vitamin B6 dosages at the university hospitals of Poitiers, Tours, Bordeaux, and Limoges for the past 5 to 8 years.
Metformin (MtF) is a treatment used for type 2 diabetes. Lactic acidosis (LA) is a frequent complication that can be either induced by or associated with elevated MtF plasma concentrations. When coupled with a mass spectrometry (MS) system, the probe electrospray ionization (PESI) method allows direct and rapid analysis of different types of matrices without pretreatment.
View Article and Find Full Text PDFBackground: Dietary habits have a profound influence on the metabolic activity of gut microorganisms and their influence on health. Concerns have been raised as to whether the consumption of foodstuffs contaminated with pesticides can contribute to the development of chronic disease by affecting the gut microbiome. We performed the first pesticide biomonitoring survey of the British population, and subsequently used the results to perform the first pesticide association study on gut microbiome composition and function from the TwinsUK registry.
View Article and Find Full Text PDFToxics
November 2021
The effects of chronic dietary Roundup (RU) exposure on rooster sperm parameters, fertility, and offspring are unknown. We investigated the effects of chronic RU dietary exposure (46.8 mg kg day glyphosate) for 5 weeks in 32-week-old roosters ( = 5 RU-exposed and = 5 control (CT)).
View Article and Find Full Text PDFBackground And Purpose: Opioids and benzodiazepines are frequently combined in medical as well as in non-medical contexts. At high doses, such combinations often result in serious health complications attributed to pharmacodynamics interactions. Here, we investigate the contribution of the metabolic interactions between oxycodone, diazepam and diclazepam (a designer benzodiazepine) in abuse/overdose conditions through ex vivo, in vivo and in silico approaches.
View Article and Find Full Text PDFBackground And Objective: In end-stage kidney disease, high urea levels promote the carbamylation of lysine side chains on a variety of proteins, including albumin. Albumin carbamylation has been identified as a risk factor for mortality and sevelamer led to a decrease in urea levels in dialysis patients. In the present secondary analysis of the NICOREN trial, we investigated the putative impacts of sevelamer and nicotinamide on albumin carbamylation, and the potential correlation between carbamylation and vascular calcifications.
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