Results 21 to 30 of about 2,756 (173)

Effect of 7,8 -Dihydroneopterin, Biopterin and Isoxanthopterin on Cholesterol and Phospholipid Content and Phospholipid Biosynthesis in Vitro

open access: yesPteridines, 1996
Incorporation of fatty acids into phospholipids has been investigated using samples of rat liver tissue homogenate (Krebs-Ringer-phosphate buffer, pH=7.4, containing 0.3% albumin, fatty acid mixture and glycerol). The addition of 7,8-dihydroneopterin and
Rudzite Vera   +4 more
doaj   +1 more source

Measurement of Neopterin and Biopterin in Urine from Phenylketonuria Heterozygotes and Normal Controls

open access: yesPteridines, 1991
The effect of an oral load of phenylalanine (100 mg/kg body weight) on the levels of neopterin and biopterin in urine has been determined in 8 heterozygotes for classical phenylketonuria and 25 supposed normal controls. In basal conditions, neopterin and
Ruiz-Vázquez P.   +7 more
doaj   +1 more source

Chemical structure of 1-O-(L-erythro-biopterin-2'-yl)-a-glucose isolated from a cyanobacterium Synechococcus sp. PCC 7942

open access: yesPteridines, 2001
A pteridine glycoside in Synechococcus sp. PCC 7942, the structure of which had been tentatively identified as biopterin-glucoside, was isolated and characterized for its exact chemical structure by 2D-NMR spectroscopy. The determined structure is 1-0-(L-
Choi Yong Kee   +3 more
doaj   +1 more source

The urinary biopterin in autism spectrum disorder

open access: yesPteridines, 2021
The aim of the study was to determine whether biopterin is present in significantly lower quantities in urine samples of patients with autism spectrum disorder (ASD) compared to healthy individuals.
Waligóra Aleksandra   +4 more
doaj   +1 more source

Neopterin and Cytokines in Hereditary Dystonia and Parkinson's Disease

open access: yesPteridines, 1999
Both neopterin and biopterin concentrations in cerebrospinal fluid from patients with Parkinson's disease, in which the nigrostriatal dopamine neurons degenerate, were lower than those from age-matched older control subjects.
Nagatsu T.   +3 more
doaj   +1 more source

Biosynthetic Enzymes of Tetrahydrolimipterin from Green Sulfur Bacterium Chlorobium Limicola

open access: yesPteridines, 1998
Based on the structure of limipterin (Cha, Pfleiderer, and Yim, Helv, Chim. Acta, 78: 600-614. 1995 the biosynthetic pathway for the newly identified pterin glycoside was investigated. It was demonstrated that tetrahydrolimipterin (H4 -limipterin) can be
Kang Dongmin, Kim Sangjoon, Yim Jeongbin
doaj   +1 more source

Immunological impact of tetrahydrobiopterin on the central nervous system in a murine model of rabies virus infection

open access: yesRevista do Instituto de Medicina Tropical de São Paulo, 2021
Currently, the Milwaukee protocol presents healing results in human beings affected by the rabies virus. However, there are many points to clarify on the action of drugs and the immune mechanism involved in the evolution of the disease.
Caio Vinicius Botelho Brito   +9 more
doaj   +1 more source

Biopterin in Parkinson's disease. [PDF]

open access: yesJournal of Neurology, Neurosurgery & Psychiatry, 1987
Tetrahydrobiopterin is an essential co-factor in the natural synthesis of dopamine. Oral tetrahydrobiopterin was given in small doses to four patients with early Parkinson's disease but had no discernible effect.
A P, Moore   +3 more
openaire   +2 more sources

Developmental and Phenotypic Outcomes in Mild Phenylalanine Hydroxylase Deficiency

open access: yesAmerican Journal of Medical Genetics Part A, EarlyView.
ABSTRACT Benign hyperphenylalaninemia (bHPA) is defined as elevated phenylalanine (Phe) levels remaining ≤ 360 μmol/L (6 mg/dL) and not requiring medical intervention. Individuals with bHPA may demonstrate a rise in their Phe levels > 360 μmol/L, effectively developing a mild PKU phenotype requiring therapy to prevent neurocognitive complications. This
Aaron Williams   +8 more
wiley   +1 more source

Pteridines and Lipid Metabolism

open access: yesPteridines, 1998
The effect of 9 different pteridines on fatty acid incorporation into phospholipids as well as on cholesterol and phospholipid content was compared in vitro using rat liver homogenate, Krebs-Ringer phosphate buffer containing 0.3 % albumin (pH=7.4 ...
Rudzite Vera   +5 more
doaj   +1 more source

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