Results 21 to 30 of about 10,182 (138)

A novel function of tetrahydrobiopterin.

Folia Pharmacologica Japonica, 1992
6R-L-erythro-5, 6, 7, 8-Tetrahydrobiopterin (6R-BH4) is known as a cofactor for the hydroxylases of phenylalanine, tyrosine and tryptophan and also as a cofactor for nitric oxide synthase. Recently, a novel function of 6R-BH4 has been found: that is, 6R-BH4 acts on specific membrane receptors to directly stimulate the release of monamine ...
MIWA, Soichi, WATANABE, Yasuyoshi, KOSHIMURA, Kunio, MASAKI, Tomoh   +3 more
openaire   +3 more sources

Tetrahydrobiopterin: biochemistry and pathophysiology

Biochemical Journal, 2011
BH4 (6R-L-erythro-5,6,7,8-tetrahydrobiopterin) is an essential cofactor of a set of enzymes that are of central metabolic importance, including four aromatic amino acid hydroxylases, alkylglycerol mono-oxygenase and three NOS (NO synthase) isoenzymes. Consequently, BH4 is present in probably every cell or tissue of higher organisms and plays a key role
Werner, E R, Blau, N, Thöny, B
openaire   +3 more sources

Endothelial Cell Tetrahydrobiopterin [PDF]

Circulation Research, 2007
See related article, pages 830–838 The predilection of atherosclerosis for specific locations in the vasculature strongly suggests that the response of the arterial wall to alterations in blood flow is an important factor in vascular disease pathogenesis.
De Bono, J, Channon, K
openaire   +1 more source

Advances in the Neurotoxic Mechanisms of Acrylamide and Multitarget Intervention Strategies of Natural Products

Food Frontiers, Volume 7, Issue 4, July 2026.
This review summarizes recent advances in acrylamide neurotoxicity mechanisms and highlights the multitarget neuroprotective effects of diverse natural products while also addressing current challenges and future translational research directions.
Wen Du, Yifan Zhao, Li Dong, Chen Ma, Xiaosong Hu, Daotong Li, Fang Chen, Yinghua Luo   +7 more
wiley   +1 more source

Vitamin‐Responsive Disorders: From Molecular Basis to Clinical Presentation and Therapy

Journal of Inherited Metabolic Disease, Volume 49, Issue 4, July 2026.
ABSTRACT Vitamin‐dependent cofactors are essential for numerous metabolic reactions, and defects affecting their uptake, conversion, utilisation, or regeneration constitute a heterogeneous group of inherited metabolic disorders (IMDs). Although dietary vitamin intake is sufficient to sustain coenzyme synthesis in healthy individuals, it is insufficient
Cécile Acquaviva, Yann Nadjar, Manuel Schiff, Christine Vianey‐Saban, Alain Fouilhoux, Jean‐François Benoist   +5 more
wiley   +1 more source

Mapping the Severity of Phenylalanine Hydroxylase Deficiency

Journal of Inherited Metabolic Disease, Volume 49, Issue 4, July 2026.
ABSTRACT Since the 1960s, phenylalanine hydroxylase (PAH) deficiency can be detected via newborn screening, allowing early start of treatment to prevent severe intellectual disability. Precise determination of PAH deficiency severity continues to be hampered by several factors.
S. Haitjema, E. M. van Steenis, C. M. A. Lubout, M. R. Heiner‐Fokkema, J. Zschocke, F. J. van Spronsen   +5 more
wiley   +1 more source

Tetrahydrobiopterin in nitric oxide synthase [PDF]

IUBMB Life, 2013
AbstractSummary: Nitric oxide synthase (NOS) is a critical enzyme for the production of the messenger molecule nitric oxide (NO) from L‐arginine. NOS enzymes require tetrahydrobiopterin as a cofactor for NO synthesis. Besides being one of the few enzymes to use this cofactor, the role of tetrahydrobiopterin in NOS catalytic mechanism is different from ...
Jesús, Tejero, Dennis, Stuehr
openaire   +2 more sources

An Overview of Pterin Analysis in Biological Samples: From Occurrence and Properties to Sample Pretreatment Combined With Hyphenated Separation Techniques

Journal of Separation Science, Volume 49, Issue 7, July 2026.
ABSTRACT Pterins are a structurally diverse group of biologically active compounds within the pteridine family, with key roles in pigmentation, redox metabolism, light sensing, and cellular signaling across a wide range of organisms. Their quantification in biological samples is analytically demanding due to their high polarity, chemical instability ...
Jindřich Brejcha, Zuzana Bosakova
wiley   +1 more source

Tetrahydrobiopterin biosynthesis, regeneration and functions [PDF]

Biochemical Journal, 2000
Tetrahydrobiopterin (BH4) cofactor is essential for various processes, and is present in probably every cell or tissue of higher organisms. BH4 is required for various enzyme activities, and for less defined functions at the cellular level.
B, Thöny, G, Auerbach, N, Blau
openaire   +2 more sources

Pharmacological treatment with a GABA(A) receptor modulator and a selective serotonin reuptake inhibitor as a mitigation strategy against aircraft noise‐induced cardiovascular and neuronal damage

British Journal of Pharmacology, Volume 183, Issue 13, Page 3762-3779, July 2026.
Abstract Background and Purpose Noise pollution, particularly by aircraft, is a significant risk factor for cardiovascular disease. Aircraft noise activates stress response pathways in the brain, via the amygdala, the sympathetic nervous system and the hypothalamic–pituitary–adrenal axis.
Ivana Kuntić, Marin Kuntić, Jiayin Zheng, Leonardo Nardi, Matthias Oelze, Arijan Valar, Dominika Mihaliková, Lea Strohm, Hans‐Georg Buchholz, Nicole Bausbacher, Simon Lange, Henning Ubbens, Qi Tang, Liyu Zhang, Guilherme Horta, Paul Stamm, Omar Hahad, Axel Methner, Sebastian Steven, Huige Li, Mathias Schreckenberger, Dilja Krueger‐Burg, Adrian Gericke, Michael J. Schmeisser, Thomas Münzel, Andreas Daiber   +25 more
wiley   +1 more source