Results 51 to 60 of about 9,956 (243)
Electronic Structure of Tetrahydropteridine Derivatives
Pteridines, 1999 Recently; the 4-amino analogue of tetrahydrobiopterin was found to be a strong inhibitor of nitric oxide synthase while being bound to the enzyme in a manner similar to the natural cofactor tetrahydrobiopterin.
Reibnegger Gilbert +2 more
doaj +1 more source
American Journal of Primatology, Volume 87, Issue 10, October 2025.Neopterin is a sensitive and specific biomarker of intracellular pathogen infection and chronic inflammation, and affected by environmental, life‐history, and sex‐contextual factors. This review offers best‐practice guidelines and practical advice on sample collection, storage, and analysis in primates when used for ecoimmunological conservation and ...
Verena Behringer, Caroline Deimel
wiley +1 more source
Tetrahydrobiopterin Deficiency: From Phenotype to Genotype [PDF]
, 2017 As a result of the selective screening worldwide during the last 18 years, approximately 250 patients with tetrahydrobiopterin deficiency were discovered.
Blau, Nenad +3 more
core
Pteridines, 2017 Pterins are widely conserved biomolecules that play essential roles in diverse organisms. First described as enzymatic cofactors in eukaryotic systems, bacterial pterins were discovered in cyanobacteria soon after.
Feirer Nathan, Fuqua Clay
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Clinical and Experimental Dental Research, Volume 11, Issue 5, October 2025.ABSTRACT Objectives The incidence of oral and oropharyngeal cancer is continually rising and affects increasingly younger patients. Consequently, many studies focus on early diagnosis using appropriate biomarkers. Neopterin and interleukin‐6 (IL‐6) are promising predictive and prognostic markers of immune response activation, both systemic and local ...
Lenka Šašková +8 more
wiley +1 more source
Theoretical study on the relative energies of cationic pterin tautomers
Pteridines, 2015 Pterins are heterocyclic molecules of biological importance that contain several basic sites. These molecules can be protonated in aqueous solution resulting in a wide variety of structures that differ in their site of protonation and tautomeric form. In
Nekkanti Sindhura, Martin Christopher B.
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Environmental Microbiology Reports, Volume 17, Issue 5, October 2025.A comprehensive genomic and phenotypic analysis of Limosilactobacillus fermentum CRL2085 revealed key probiotic and nutritional traits supporting its safe application in cattle feed. The strain harbors genes for stress tolerance, adhesion, exopolysaccharide production, and B‐vitamin biosynthesis, and efficiently metabolizes plant‐derived carbohydrates,
Cecilia M. Aristimuño Ficoseco +9 more
wiley +1 more source
Differential Inhibition of Constitutive and Inducible Nitric Oxide Synthase in Vascular Endothelial Cells by Analogues of Tetrahydrobiopterin [PDF]
, 2017 In the vasculature, a physiologic production of nitric oxide (NO) is maintained by endothelial nitric oxide synthase (eNOS). Induction of inducible nitric oxide synthase (ÍNOS) under inflammatory conditions (e.g. septic shock) resulting in high levels of
Linscheid, Philippe +4 more
core
First Synthesis of a Natural Isoxanthopterin Glycoside, Asperopterin-A [PDF]
, 2012 The key precursor, N-2-(N,N-dimethylaminomethylene)-6-hydroxymethy1-8-methyl-3[2-(4-nitrophenypethyl]-7-xanthopterin (9) was efficiently prepared from 2,5-diamino-6-methylam1no-3H-pyrimidin-4-one (3) and ethyl 3-(tert-butyldimethylsilyloxy)-2 ...
Ejiri, Kazumasa +2 more
core +1 more source
Pteridines, 1998 Aim: The aim of the study was to determine whether orthotopic liver transplantation leads to the activation of macrophages, neutrophils and complement.
Tomasdottir H. +3 more
doaj +1 more source