Results 51 to 60 of about 2,794 (172)

The value of simultaneous determination of blood large neutral amino acids and tetrahydrobiopterin metabolites in the diagnosis of atypical hyperphenylalaninemia

Egyptian Liver Journal
Tetrahydrobiopterin deficiency in newborns with atypical hyperphenylalaninemia requires rapid and accurate diagnosis and the ability to distinguish it from the classical type to prevent early irreversible neurological damage.
Nadia Salama, Gamalte Elgedawy, Radwa Gamal, Osama Zaki, Ashraf Khalil, Manar Obada   +5 more
doaj   +1 more source

Influences of Catecholamine Contents on Tetrahydrobiopterin Metabolism

Pteridines, 1998
The influence of changes in catecholamine metabolism on tetrahydrobiopterin biosynthesis was investigated in cultured rat pheochromocytoma PC12 cells. The increase in the cellular dopamine content after treatment with the MAO-COMT inhibitor or dopamine ...
Kuzuya Hiroshi, Sakamoto Hideo, Fujita Ko   +2 more
doaj   +1 more source

Leishmania donovani's protein tyrosine phosphatases interact with DUF21 and respond to environmental magnesium

The FEBS Journal, Volume 293, Issue 6, Page 1754-1770, March 2026.
The Leishmania phosphatase PTP1, and possibly the genetically similar PTP2, interacts with the Leishmania transmembrane protein DUF21. When both ptp1 and ptp2 are knocked out of Leishmania (LdΔPTP1/2), the parasite can no longer survive without magnesium in vitro and has reduced viability in the host macrophage. Conversely, in duf21 knockout (LdΔDUF21),
Kayla Paulini, Hira Khursheed, Wen Wei Zhang, Isabelle Aubry, Greg Matlashewski, Michel L. Tremblay, Patrick Lypaczewski   +6 more
wiley   +1 more source

Evaluation of Serum and Urinary Levels of some Pteridine Pathway Components in Healthy Turkish Children

Pteridines, 2012
Neopterin, as a non-conjugated pteridine, is synthesized from guanosine triphosphate and its production is upregulated upon the activation of cellular immune response.
Girgin Gözde, Baydar Terken, Fuchs Dietmar, Sahin Gönül, Özmert Elif, Yurdakök Kadriye   +5 more
doaj   +1 more source

Role of endothelial colony forming cells (ECFCs) Tetrahydrobiopterin (BH4) in determining ECFCs functionality in coronary artery disease (CAD) patients

Scientific Reports, 2022
Nitric oxide (NO . ) is critical for functionality of endothelial colony forming cells (ECFCs). Dimerization of endothelial nitric oxide synthase (eNOS) is must to produce NO . and tetrahydrobiopterin (BH4) plays a crucial role in stabilizing this state.
Atanu Sen, Archna Singh, Ambuj Roy, Sujata Mohanty, Nitish Naik, Mani Kalaivani, Lakshmy Ramakrishnan   +6 more
doaj   +1 more source

Metabolomic Analysis of Phytophthora parasitica Growth in the Presence of β‐sitosterol Indicates Adaptive Mechanisms Modulated by Sterols

Journal of Basic Microbiology, Volume 66, Issue 2, February 2026.
ABSTRACT Phytophthora parasitica is a generalist phytopathogenic oomycete that infects a series of crops with great economic interest, including tomato, tobacco, and citrus species. Sterols are essential lipids in eukaryotic organisms, playing a fundamental role in the structure and function of the cell membrane.
Pâmela Ponce Martins, Evandro Silva, Marcus Vinicius Fernandes Prior, João Marcos Martins Ferreira, Marina Erê Pimenta Santos, Flavia Rodrigues Alves Patrício, Taicia Pacheco Fill, Jorge Maurício Costa Mondego   +7 more
wiley   +1 more source

Pteridine Pathway in Patients with Degenerative Diseases During Short Time Treatment with Low Dose of Meloxicam, as a Non-steroidal Anti-inflammatory Drug

Pteridines, 2008
The profiles of unconjugated pteridines such as neopterin and biopterin and of tryptophan metabolism change in many pathologic conditions such as rheumatoid arthritis, malignancies and autoimmune diseases and are related to the release of pro ...
Baydar Terken, Girgin Gozde, Fuchs Dietmar, Inanici Fatma, Sipahi Hande, Erol Ozlem, Sahin Gonul   +6 more
doaj   +1 more source

Immune Stimulation of Interferon-Gamma- and Biopterin Synthesis with Endotoxin in Animal-Experimental Peritonitis

Pteridines, 1993
As a result to a microhial stimulus different defence systems are activated. Bacterial lipopolysaccharids (endotoxins) can lead to activation of the immune system in which phagocytic cells like macrophages.
Kullich W., Weissenhofer W., Hunsicker A., Rokos H.   +3 more
doaj   +1 more source

Pterins as Sensors of Response to the Application of Fe3+-Dextran in Piglets

Sensors, 2010
The aim of the presented study was to assess the effect of a single administration of Fe3+-dextran on immune cell counts and pterin biomolecule production as novel sensors of the piglets' immune system activation, and to determine concentrations of ...
Klara Breinekova, Martin Svoboda, Miriam Smutna   +2 more
doaj   +1 more source

Further Insights Into Anticholinergic Action Informed by Japanese Anticholinergic Risk Scale

Geriatrics &Gerontology International, Volume 26, Issue 1, January 2026.
ABSTRACT The increased anticholinergic burden caused by medications in older adults is one of the adverse drug reactions of particular concern, as it can exacerbate the onset of geriatric syndromes or induce cognitive dysfunction, and is also related to the issue of polypharmacy.
Masaki Mogi, Shuang Liu, Yasuyuki Suzuki, Yuuka Shibata, Shizuo Yamada   +4 more
wiley   +1 more source