Results 21 to 30 of about 169,173 (169)

Alcool e radicais livres de oxigénio.

open access: yesActa Médica Portuguesa, 1993
Oxygen free radicals may be generated during ethanol metabolization by cytochrome P450, or due to the formation of xanthine oxidase by ethanol effect on xanthine dehydrogenase.
M L Mira, C F Manso
doaj   +1 more source

Binding Modes of Xanthine‐Derived Selective Allosteric Site Inhibitors of MTHFD2

open access: yesChemistryOpen, 2023
Methylenetetrahydrofolate dehydrogenase (MTHFD2) is a mitochondrial enzyme involved in 1 C metabolism that is upregulated in various cancer cells, but absent in normal proliferating cells. Xanthine derivatives are the first selective inhibitors of MTHFD2
Dr. Vibhu Jha   +1 more
doaj   +1 more source

Targeted knock-in mice expressing the oxidase-fixed form of xanthine oxidoreductase favor tumor growth

open access: yesNature Communications, 2019
The roles of the convertible forms, xanthine dehydrogenase (XDH) and xanthine oxidase (XO) during tumorigenesis is not known. Here, the authors develop XDH-stable and XO-locked knock-in (ki) mice and show increased tumor growth in XO ki mice, via ...
Teruo Kusano   +11 more
doaj   +1 more source

Classical xanthinuria: a rare cause of pediatric urolithiasis

open access: yesUrology Research and Practice, 2019
Xanthine dehydrogenase catalyzes the oxidation of hypoxanthine to xanthine and xanthine to uric acid in the final two steps of purine degradation.
Nurver Akıncı   +2 more
doaj   +1 more source

XDH and XO Research and Drug Discovery—Personal History

open access: yesMolecules, 2023
The author will outline the research history of the main issues addressed in this paper. The author has worked on this research himself. XDH, which is responsible for purine degradation, is present in various organisms.
Takeshi Nishino
doaj   +1 more source

An in vitro System for Studying Pteridine Biosynthesis In Drosophila melanogaster

open access: yesPteridines, 1991
In vitro organ culture is a system especially useful for the study of metabolic pathways and their regulation. This report applies such a system to the study of the biosynthesis of pteridines in Drosophila melanogaster, determining in vitro optimal ...
Escriche B., Silva F. J.
doaj   +1 more source

Some opportunities of using xanthine oxidase inhibitors

open access: yesСовременная ревматология, 2019
The review presents modern concepts of the role of xanthine oxidase (XO) in the pathogenesis of a number of diseases. It has been shown that XO activity can be associated with the development and progression not only of gout, but, possibly, diabetes ...
O. V. Zhelyabina, M. S. Eliseev
doaj   +1 more source

Xanthine oxidoreductase: One enzyme for multiple physiological tasks

open access: yesRedox Biology, 2021
Human xanthine oxidoreductase (XOR) is a multiple-level regulated enzyme, resulting from a complicated evolutionary process that assigned it many physiological roles.
Massimo Bortolotti   +3 more
doaj   +1 more source

The role of urate and xanthine oxidase in vascular oxidative stress:Future directions [PDF]

open access: yes, 2009
Vascular oxidative stress has been shown to be a potent factor in the pathophysiology of endothelial dysfunction. Despite current optimal evidence-based therapy, mortality from various cardiovascular disorders remains high.
Allan Struthers   +3 more
core   +1 more source

Ionic Gating of Liquid‐Crystal‐Like Pteridine Assemblies Enables Tunable Light Scattering

open access: yesAdvanced Materials, EarlyView.
Tunable optical properties emerge through developmentally regulated ionic gating, which transforms disordered, ultraviolet (UV)‐absorbing organelles into concentrically ordered, liquid‐crystal‐like light scatterers. By integrating analyses of pteridine composition, potassium‐dependent assembly, hierarchical ultrastructure, and optical behavior, the ...
Sourabh Bera   +22 more
wiley   +1 more source

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