The toxic hallucinogen 25B-NBOMe is very rapidly degraded by human liver microsomes and has low oral bioavailability. Herein we report on the synthesis, microsomal stability, and 5-HT/5-HT receptor profile of novel analogues of 25B-NBOMe modified at the primary site of metabolism. Although microsomal stability could be increased while maintaining potent 5-HT receptor agonist properties, all analogues had an intrinsic clearance above 1.3 L/kg/h predictive of high first-pass metabolism.
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http://dx.doi.org/10.1021/acschemneuro.6b00265 | DOI Listing |
ACS Chem Neurosci
January 2024
Center for Drug Discovery, Northeastern University, Boston, Massachusetts 02115, United States.
The serotonin (5-hydroxytryptamine, 5-HT) 5-HT G-protein coupled receptor subtypes (5-HT) share a high sequence homology, confounding development of subtype-specific ligands. This study used a 5-HT structure-based ligand design approach to develop subtype-selective ligands using a 5-substituted-2-aminotetralin (5-SAT) chemotype, leveraging results from pharmacological, molecular modeling, and mutagenesis studies to delineate molecular determinants for 5-SAT binding and function at 5-HT subtypes. 5-SATs demonstrated high affinity ( ≤ 25 nM) and at least 50-fold stereoselective preference ([2] > [2]) at 5-HT, 5-HT and 5-HT receptors but essentially nil affinity ( > 1 μM) at 5-HT receptors.
View Article and Find Full Text PDFPharmacol Rep
December 2023
Max-Delbrück-Center for Molecular Medicine, Robert-Rössle-Str. 10, 13125, Berlin, Germany.
Background: Serotonin (5-HT) 5-HT receptor mRNA editing (at five sites, A-E), implicated in neuropsychiatric disorders, including clinical depression, remains unexplored during alcohol abstinence-often accompanied by depressive symptoms.
Methods: We used deep sequencing to investigate 5-HT receptor editing in mice during early ethanol deprivation following prolonged alcohol exposure and mice lacking tryptophan hydroxylase (TPH)2, a key enzyme in central 5-HT production. We also examined Tph2 expression in ethanol-deprived animals using quantitative real-time PCR (qPCR).
Front Endocrinol (Lausanne)
October 2023
Brain Health Research Institute and Department of Biological Sciences, Kent State University, Kent, OH, United States.
Background: The neuroendocrine control of ovulation is orchestrated by neuronal circuits that ultimately drive the release of gonadotropin-releasing hormone (GnRH) from the hypothalamus to trigger the preovulatory surge in luteinizing hormone (LH) secretion. While estrogen feedback signals are determinant in triggering activation of GnRH neurons, through stimulation of afferent kisspeptin neurons in the rostral periventricular area of the third ventricle (RP3V neurons), many neuropeptidergic and classical neurotransmitter systems have been shown to regulate the LH surge. Among these, several lines of evidence indicate that the monoamine neurotransmitter serotonin (5-HT) has an excitatory, permissive, influence over the generation of the surge, activation of type 2 5-HT (5-HT) receptors.
View Article and Find Full Text PDFInt Immunopharmacol
December 2023
Department of Echocardiography, The First Hospital of Jilin University, Changchun, China. Electronic address:
Serotonin (5-hydroxytryptamine or 5-HT) is a neuroendocrine peptide endowed with immunomodulatory functions. Regulatory B cells (Bregs) play an important role in maintaining intestinal immune homeostasis. We analyzed the differences of 5-HT and Bregs between peripheral blood of ulcerative colitis (UC) and healthy controls (HC).
View Article and Find Full Text PDFInt J Mol Sci
September 2023
Koltsov Institute of Developmental Biology, Russian Academy of Sciences, Moscow 119334, Russia.
The aim of this work was to explore the involvement of 5-HT and 5-HT receptors (5-HTR and 5-HTR) in the regulation of free cytoplasmic calcium concentration ([Ca]) in human umbilical vein endothelial cells (HUVEC). We have shown by quantitative PCR analysis, that 5-HTR and 5-HTR mRNAs levels are almost equal in HUVEC. Immunofluorescent staining demonstrated, that 5-HTR and 5-HTR are expressed both in plasma membrane and inside the cells.
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