This study focuses on the design, synthesis, molecular modeling and biological evaluation of a novel group of alkyl-1,3,5-triazinyl-methylpiperazines. New compounds were synthesized and their affinities for human histamine H receptor (hHR) were evaluated. Among them, 4-(cyclohexylmethyl)-6-(4-methylpiperazin-1-yl)-1,3,5-triazin-2-amine (14) exhibited hHR affinity with a K of 160 nM and behaved as antagonist in functional assays: the cellular aequorin-based assay (IC = 32 nM) and [S]GTPγS binding assay (pK = 6.67). In addition, antinociceptive activity of 14in vivo was observed in Formalin test (in mice) and in Carrageenan-induced acute inflammation test (in rats).
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http://dx.doi.org/10.1016/j.bmc.2019.02.020 | DOI Listing |
Environ Sci Technol
December 2024
Research Center for Environmental Quality Management, Graduate School of Engineering, Kyoto University, Otsu, Shiga 520-0811, Japan.
Pharmaceutical discharge to the environment is of concern due to its potential adverse effects on aquatic species. It is estimated that around 40% of pharmaceuticals target G protein-coupled receptors (GPCRs). The transforming growth factor- (TGF) shedding assay was applied to measure the antagonistic activities of pharmaceuticals against human GPCRs.
View Article and Find Full Text PDFJ Med Chem
December 2024
Amsterdam Institute of Molecular and Life Sciences (AIMMS), Division of Medicinal Chemistry, Faculty of Science, Vrije Universiteit Amsterdam, De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands.
Analysis of structure-kinetic relationships (SKR) can contribute to an improved understanding of receptor-ligand interactions. Here, fragment (4-(2-benzylphenoxy)-1-methylpiperidine) was used in different fragment growing approaches to mimic the putative binding mode of the long residence time (RT) ligands olopatadine, acrivastine, and levocetirizine at the histamine H receptor (HR). SKR analyses reveal that introduction of a carboxylic acid moiety can increase RT at HR up to 11-fold.
View Article and Find Full Text PDFBiomed Rep
February 2025
Division of Gastroenterology, Department of Medicine, Jichi Medical University, Shimotsuke, Tochigi 329-0498, Japan.
The appearance of 'web-like mucus' in the stomach is a novel phenomenon associated with vonoprazan (VPZ) usage, characterized by a descriptive mucus pattern resembling a spider web or net. The present study aimed to determine its prevalence and related factors. In this retrospective observational study, the medical records and endoscopic reports of 547 patients who underwent an esophagogastroduodenoscopy were reviewed.
View Article and Find Full Text PDFGut
December 2024
Department of Gastroenterology, Xiangya Hospital, Central South University, Changsha, Hunan, China
Psychopharmacology (Berl)
December 2024
Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, Kings College London, De Crespigny Park, London, SE5 8AF, UK.
Rationale: Working memory impairment is a prominent feature of schizophrenia which predicts clinical and functional outcomes. Preclinical data suggest histamine-3 receptor (H3R) expression in cortical pyramidal neurons may have a role in working memory, and post-mortem data has found disruptions of H3R expression in schizophrenia.
Objectives: We examined the role of H3R in vivo to elucidate its role on working memory impairment in schizophrenia.
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