Evidence, obtained in rodent and primate models of Parkinson's disease (PD) and in preliminary clinical trials, indicates that adenosine A(2A) receptor antagonists might represent a promising non-dopaminergic therapeutic tool for the treatment of PD. Recently, we have reported the biological evaluation of 8-substituted 9-ethyladenines (ANR) as new A(2A) receptor antagonists, three of which (ANR 82, ANR 94, and ANR 152) showed high efficacy in in vivo models for Parkinson's. Understanding the metabolic pathways of new drug candidates is an important aspect of drug discovery. The ANR compounds have been investigated in order to clarify their activity on rat liver microsomes, and more specifically on recombinant human cytochrome P450 2D6 (CYP2D6). The metabolites of all three compounds were detected by liquid chromatography/tandem mass spectrometry (LC-MS/MS). The results indicate that this class of 9-ethyladenines is metabolized only to a fraction of 1.5-5%. These compounds also act as potent mechanism-based inhibitors of CYP450 and in particular of human isoform CYP2D6. Kinetic-analysis of enzyme inactivation was used to describe the effect of these time-dependent inhibitors and to derive the inhibition parameters K(inact) and K(i) defined with respect to the O-demethylation of dextromethorphan.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.2174/187231208786734076 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Compound 38, a novel potent and selective antagonist of adenosine A receptor, enhances arousal in mice.
Acta Pharmacol Sin
January 2025
Department of Pharmacology, School of Basic Medical Sciences, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Joint International Research Laboratory of Sleep, Fudan University, Shanghai, 200032, China.
Adenosine A receptor (AR) plays a pivotal role in the regulation of sleep-wake behaviors. We previously reported an AR selective antagonist compound 38 with an IC value of 29.0 nM.
View Article and Find Full Text PDFHost metabolism balances microbial regulation of bile acid signalling.
Nature
January 2025
Department of Chemistry and Chemical Biology, Boyce Thompson Institute, Cornell University, Ithaca, NY, USA.
Metabolites derived from the intestinal microbiota, including bile acids (BA), extensively modulate vertebrate physiology, including development, metabolism, immune responses and cognitive function. However, to what extent host responses balance the physiological effects of microbiota-derived metabolites remains unclear. Here, using untargeted metabolomics of mouse tissues, we identified a family of BA-methylcysteamine (BA-MCY) conjugates that are abundant in the intestine and dependent on vanin 1 (VNN1), a pantetheinase highly expressed in intestinal tissues.
View Article and Find Full Text PDFAngelica gigas Nakai (Korean Dang-gui) Root Alcoholic Extracts in Health Promotion and Disease Therapy - active Phytochemicals and In Vivo Molecular Targets.
Pharm Res
January 2025
Penn State Cancer Institute, Pennsylvania State University, Hershey, PA, 17033, USA.
Angelica gigas Nakai (AGN) root is a medicinal herbal widely used in traditional medicine in Korea. AGN root ethanolic extracts have been marketed as dietary supplements in the United States for memory health and pain management. We have recently reviewed the pharmacokinetics (PK) and first-pass hepatic metabolism of ingested AGN supplements in humans for the signature pyranocoumarins decursin (D, C 1x), decursinol angelate (DA, C ~ 10x) and their common botanical precursor and hepatic metabolite decursinol (DOH, C ~ 1000x).
View Article and Find Full Text PDFAn Outline on benzimidazole Containing Marketed Drugs with Proton Pump Inhibitor and H Receptor Antagonist Activities.
Mini Rev Med Chem
January 2025
Department of Chemistry, Kurukshetra University, Kurukshetra, Kurukshetra, 136119, India.
Heterocyclic compounds are increasingly used in medicinal chemistry because they are the main components of many biological processes and materials. Benzimidazole remains the core center of the heterocyclic chemical group, with essential traits such as six-five-member connected rings and two nitrogen atoms at the 1,3 position in a six-membered benzene and five-membered imidazole- fused ring system. Molecules with benzimidazole derivatives serve important functions as therapeutic agents and have shown excellent results in clinical and biological research.
View Article and Find Full Text PDFPredictive Value and Potential of Targeting Complement Factor C3 in Patients with Renal Injury in Preeclampsia.
Curr Mol Med
January 2025
Department of Obstetrics and Gynecology, Beijing Shijitan Hospital, Capital Medical University, Beijing, 100038, China.
Aim: The activation of the complement system is accompanied by the occurrence and development of preeclampsia, as well as kidney diseases. Here, the role of complement C3 [C3] in renal injury in preeclampsia was explored, and its potential application as an early diagnostic biomarker or drug target to ameliorate kidney injury induced by preeclampsia was preliminarily evaluated.
Method: A total of 48 subjects were included in the present study, and the complement C3 levels and renal function were analyzed.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!