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Aldehyde oxidase (AOX) is a metabolic enzyme catalyzing the oxidation of aldehyde and aza-aromatic compounds and the hydrolysis of amides, moieties frequently shared by the majority of drugs. Despite its key role in human metabolism, to date only fragmentary information about the chemical features responsible for AOX susceptibility are reported and only "very local" structure-metabolism relationships based on a small number of similar compounds have been developed. This study reports a more comprehensive coverage of the chemical space of structures with a high risk of AOX phase I metabolism in humans. More than 270 compounds were studied to identify the site of metabolism and the metabolite(s). Both electronic [supported by density functional theory (DFT) calculations] and exposure effects were considered when rationalizing the structure-metabolism relationship.
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http://dx.doi.org/10.1073/pnas.1618881114 | DOI Listing |
J Environ Manage
September 2025
School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710049, China. Electronic address:
The stability of microbial communities within sewer systems is essential for maintaining effluent quality and infrastructure longevity. However, the functional consequences of viral interactions with biofilms remain poorly characterised. This study examines the effects of bacteriophage MS2 adsorption on biofilm structure, metabolism, and pathogenic potential in a simulated 1 km sewer pipeline.
View Article and Find Full Text PDFArch Toxicol
September 2025
School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi, 530004, People's Republic of China.
The abuse of fentanyl-type new psychoactive substances (F-NPS), which exhibit the four defining characteristics of new psychoactive substances (third-generation drugs), poses a severe threat to social stability and public health. The derivatization strategy investigated in this study, involving six substituted acetyl F-NPS across two substitution patterns, represents the primary approach for generating a new F-NPS. Using an in vitro human liver microsome metabolic model coupled with liquid chromatography-ion trap tandem time-of-flight mass spectrometry, we identified characteristic metabolism profiles of F-NPS corresponding to derivatization modifications while elucidating the structural effects on metabolism.
View Article and Find Full Text PDFClin Chem
August 2025
Forensic Science Group, Photon Science Research Division, RIKEN SPring-8 Center, Sayo, Japan.
Background: Hexahydrocannabinol (HHC) and its analogs are recent additions to semi-synthetic cannabinoids in the recreational drug market. Here, the metabolism of 18 HHC analogs was compared to gain a comprehensive understanding of the structure-metabolism relationship of HHC analogs and to identify urinary biomarkers. Additionally, an authentic urine sample obtained from a suspected hexahydrocannabiphorol (HHCP) user was analyzed.
View Article and Find Full Text PDFFront Neurol
May 2025
Department of Radiology, The 960th Hospital of the People's Liberation Army Joint Logistics Support Force, Jinan, China.
Background: Previous studies have shown that alterations in brain structure, metabolism, and function are prevalent in patients with end-stage renal disease (ESRD); however, the synchronization of early functional changes between the two functional hemispheres in these patients remains unclear. This study aimed to analyze interhemispheric functional connectivity in patients with ESRD using resting-state fMRI with voxel mirrored homotopic connectivity (VMHC) algorithm.
Methods: The study cohort comprised 36 patients with ESRD receiving hemodialysis without cognitive impairment and 34 matched healthy control (HCs).
Ecotoxicol Environ Saf
July 2025
College of Agriculture and Biotechnology, Hunan University of Humanities, Science and Technology, Loudi, Hunan 417000, China; Key Laboratory of Development, Utilization, Quality and Safety Control of Characteristic Agricultural Resources in Central Hunan Province, Loudi, Hunan 417000, China. Electro
Cadmium (Cd) is a common environmental pollutant in aquatic ecosystems, often present in the form of pulses. However, the toxic effects of Cd on aquatic animals have been found to come primarily from continuous exposure, and there is little research on the effects of pulse exposure on animals. Here, the different effects of Cd exposure patterns on the motor behavior, brain histology and brain metabolism of Pelophylax nigromaculatus tadpoles (20 per parallel group) were explored.
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