Results 131 to 140 of about 5,435 (148)
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Urinary levels of neopterin and biopterin in Autism
Neuroscience Letters, 1998The pterins, neopterin and biopterin, occur naturally in body fluids including urine. It is well established that increased neopterin levels are associated with activation of the cellular immune system and that reduced biopterins are essential for neurotransmitter synthesis.
R.S Sungum-Paliwal +5 more
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Neopterin and Biopterin Levels in Pregnancy
2002The roles of nitric oxide in pregnancy have been shown to regulate vascular tone to fit with the hemodynamic changes characterizing pregnancy and to modulate uterine contractility (1,2,3). The activity of nitric oxide synthase is dependent on the availability of cofactors including tetrahydrobiopterin (BH4) (4). The precise role of BH4 is not yet known.
Naoko Iwanaga +11 more
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The Effect of Exercise on Plasma Biopterin Levels
Neuropsychobiology, 1994The plasma total biopterin and tetrahydrobiopterin levels of 29 normal volunteers were measured before and after exercise by ergometer, and those of 10 were also measured until 24 h after exercise. An increase of plasma total biopterin and tetrahydrobiopterin was observed only after strong exercise, which exhausted the subjects, the ratio of ...
Tatsuro Ohta +4 more
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New aspects in biopterin biosyntheses
1981A human kidney preparation which catalyzes the conversion of D-erythro-dihydroneopterin triphosphate (NeH2P3) to dihydrobiopterin (BH2), sepiapterin, pyruvate and pterin in the presence of Mg++ and NADPH was studied. After incubation with NeH2P3, the formation of Tanaka’s compound X (probably 6-(1’,2’-dioxopropyl)-7,8-dihydropterin) could be proven as ...
Curtius Hc +4 more
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Reindarstellung von Biopterin und 7-Biopterin
Hoppe-Seyler´s Zeitschrift für physiologische Chemie, 1962H Metzger, H Rembold
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Progress in Phenylketonuria: Defects in the Metabolism of Biopterin
Pediatrics, 1980Although progress in a major biological frontier, the neurosciences, has been both rapid and broadly based, it has offered little to the practical pediatrician. Some recent reports may forecast a change. Careful study of an old subject, phenylketonuria (PKU), has opened up a new area of research that has great potential significance ...
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BIOPTERIN DERIVATIVES IN SENILE DEMENTIA
The Lancet, 1979R. J. Leeming, J.A. Blair, V. Melikian
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Biopterin and Folic Acid Deficiency
The American Journal of Clinical Nutrition, 1967A. F. Fleming, H. P. Broquist
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Measurement of Biopterin and the Use of Inhibitors of Biopterin Biosynthesis
2003openaire +3 more sources