Results 81 to 90 of about 23,011 (262)

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, Mueller, Nicolas J., Schaffner, Andreas, Schoedon, Gabriele, Walter, Roland Β.   +4 more
core  

Response of Phenylketonuria to Tetrahydrobiopterin [PDF]

The Journal of Nutrition, 2007
A favorable response, indicated by decline of blood phenylalanine (Phe) in patients with phenylketonuria (PKU), to orally administered 6-R-L-erythro-5, 6, 7, 8-tetrahydrobiopterin (BH4) has been reported in many countries following the first publication in 1999. In this review, we describe the experience in the United States with PKU patients and their
Kimberlee, Michals-Matalon, Gita, Bhatia, Flemming, Guttler, Stephen K, Tyring, Reuben, Matalon   +4 more
openaire   +2 more sources

Impact of High‐Fat Diet on Biochemical Changes Following Experimental Myocardial Infarction

Journal of Cellular and Molecular Medicine, Volume 29, Issue 23, December 2025.
ABSTRACT Myocardial infarction (MI) is a sudden necrosis of cardiomyocytes, often caused by atherosclerosis, with obesity being a significant risk factor. This study aimed to evaluate the effects of a high‐fat diet (HFD) on post‐MI myocardial remodelling, focusing on inflammatory signalling, nitric oxide synthase (NOS) dysregulation and oxidative ...
Katarina Bujnova, Andrej Barta, Jan Lakota, Martina Cebova   +3 more
wiley   +1 more source

Investigation of the Relationship Between Serum Tetrahydrobiopterin and Folic Acid Levels with Each Other and with Preeclampsia in the Second and Third Trimesters

Van Tıp Dergisi
INTRODUCTION: Aim: This study investigates the relationship between serum tetrahydrobiopterin (BH4) and folic acid levels in pregnant women during the second and third trimesters and the development of preeclampsia.
Mücahit Ahmet Aranlı, Kazım uckan, Aziz Gül, Yusuf Başkıran, İzzet Çeleğen   +4 more
doaj   +1 more source

Stimulation of Tetrahydrobiopterin Synthesis by Basic Fibroblast Growth Factor in Vascular Endothelial Cells

Pteridines, 2003
The purpose of this study was to examine whether basic fibroblast growth factor (bFGF) stimulates tetrahydrobiopterin (BH4) synthesis in mouse brain microvascular endothelial cells.
Shimizu Shunichi, Miyasaka Yoshiyuki, Yamamoto Shinichiro, Ishii Masakazu, Kiuchi Yuji   +4 more
doaj   +1 more source

Uncovering Hyperhomocysteinemia: Global Risk Patterns and Molecular Disruption in Brain and Vascular Health

Journal of Neurochemistry, Volume 169, Issue 12, December 2025.
Elevated homocysteine results from genetic variants, impaired one‐carbon metabolism, nutritional deficiencies, and metabolic disorders. Hyperhomocysteinemia drives oxidative stress, inflammation, excitotoxicity, and epigenetic disruption, affecting multiple organs and systems.
Osmar Vieira Ramires Júnior, Gustavo Ricardo Krupp Prauchner, Alessandra Schmitt Rieder, Ana Karla Oliveira Leite, Clarissa Penha Farias, Angela T. S. Wyse   +5 more
wiley   +1 more source

Trial Readiness: Understanding the Natural History of Rare Diseases

Journal of Inherited Metabolic Disease, Volume 48, Issue 6, November 2025.
ABSTRACT Inherited metabolic diseases (IMD) represent the largest and still growing group of treatable genetic disorders and are increasingly amenable to targeted interventions that achieve varying degrees of prognostic improvement. Innovative therapies are on the horizon and offer promising opportunities for disease‐changing treatment for a variety of
Thomas Opladen, Ulrike Mütze, Florian Gleich, Sven F. Garbade, Oya Kuseyri Hübschmann, Matthias Zielonka, Stefan Kölker   +6 more
wiley   +1 more source

The Nitric Oxide System in Peripheral Artery Disease: Connection with Oxidative Stress and Biopterins

Antioxidants, 2020
Peripheral artery disease (PAD) pathophysiology extends beyond hemodynamics to include other operating mechanisms, including endothelial dysfunction. Oxidative stress may be linked to endothelial dysfunction by reducing nitric oxide (NO) bioavailability.
Ahmed Ismaeel, Evlampia Papoutsi, Dimitrios Miserlis, Ramon Lavado, Gleb Haynatzki, George P. Casale, William T. Bohannon, Robert S. Smith, Jack Leigh Eidson, Robert Brumberg, Aaron Hayson, Jeffrey S. Kirk, Carlos Castro, Ian Sawicki, Charalambos Konstantinou, Luke P. Brewster, Iraklis I. Pipinos, Panagiotis Koutakis   +17 more
doaj   +1 more source

Challenges in the management of Phenylketonuria in Malta [PDF]

, 2016
Phenylketonuria (PKU) is a rare metabolic disorder comprising a number of different enzyme deficiencies. In Malta, dihydropteridine reductase (DHPR) deficiency appears to be more common than phenylalanine hydroxylase deficiency (classical PKU), and is ...
Attard Montalto, Simon, Attard, Stephen
core  

The key role of nitric oxide in hypoxia: hypoxic vasodilation and energy supply-demand matching [PDF]

, 2013
Significance: a mismatch between energy supply and demand induces tissue hypoxia with the potential to cause cell death and organ failure. Whenever arterial oxygen concentration is reduced, increases in blood flow - 'hypoxic vasodilation' - occur in an ...
Alex Dyson, Audibert G, Berne RM, Blitzer ML, Boutilier RG, Brown IP, Devlin C, Furukawa K, Hall JE, Heyes MP, Jekabsone A, Lehninger A, Leone AM, Louis CA, Martin Feelisch, Mervyn Singer, Michele Umbrello, Modin A, Munk VC, Pohl U, Rengasamy A, Rengasamy A, Vallance P, Whorton AR   +23 more
core   +1 more source