Results 81 to 90 of about 2,236 (204)

MOESM2 of Effect of blood contamination of cerebrospinal fluid on amino acids, biogenic amines, pterins and vitamins

, 2019
Additional file 3: Figure S2. Typical chromatograms of the different metabolites analysed in non-spiked CSF samples: (1) Amino acids. (2) Biogenic amines. (3) Pterins. (4) 5-methyltetrahydrofolate. (5) Pyridoxal 5´-phosphate.
Maria del Carmen Salgado (7867985), Marta Batllori (7867979), Angels Garcia-Cazorla (7867997), Cristina Sierra (7867982), Aida Ormazabal (3165903), Guerau Fernandez (7867994), Marta Molero-Luis (499096), Laura Marti-Sanchez (7867988), Joan Maynou (7867991), Rafael Artuch (435125), Mercedes Casado (3153636)   +10 more
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Neopterin, Dihydroneopterin, Tetrahydroneopterin: Different Structures-Increasing Capacity Cleaving the Porphyrin in Heme Proteins

Pteridines, 2002
Neopterin, 7,8-dihydroneopterin and 5,6,7,8-terahydroneopterm are secreted by human macrophages after activation by interferon-γ. The biological stability of the reduced pterins is less than one hour and therefore distinctly lower than that of neopterin.
Horejsi Renate, Möller Reinhard, Tafeit Erwin, Reibnegger Gilbert   +3 more
doaj   +1 more source

Genome mining unearths a hybrid nonribosomal peptide synthetase-like-pteridine synthase biosynthetic gene cluster

eLife, 2017
Nonribosomal peptides represent a large class of metabolites with pharmaceutical relevance. Pteridines, such as pterins, folates, and flavins, are heterocyclic metabolites that often serve as redox-active cofactors.
Hyun Bong Park, Corey E Perez, Karl W Barber, Jesse Rinehart, Jason M Crawford   +4 more
doaj   +1 more source

Theoretical study on the relative energies of cationic pterin tautomers

Pteridines, 2015
Pterins are heterocyclic molecules of biological importance that contain several basic sites. These molecules can be protonated in aqueous solution resulting in a wide variety of structures that differ in their site of protonation and tautomeric form. In
Nekkanti Sindhura, Martin Christopher B.
doaj   +1 more source

Effect of blood contamination of cerebrospinal fluid on amino acids, biogenic amines, pterins and vitamins

Fluids and Barriers of the CNS, 2019
Background Cerebrospinal fluid (CSF) metabolomic investigations are a powerful tool for studying neurometabolic diseases. We aimed to assess the effect of CSF contamination with blood on the concentrations of selected biomarkers. Methods CSF samples were
Marta Batllori, Mercedes Casado, Cristina Sierra, Maria del Carmen Salgado, Laura Marti-Sanchez, Joan Maynou, Guerau Fernandez, Angels Garcia-Cazorla, Aida Ormazabal, Marta Molero-Luis, Rafael Artuch   +10 more
doaj   +1 more source

Electron-transfer processes induced by the triplet state of pterins in aqueous solutions [PDF]

, 2010
Pterins (Pt) are heterocyclic compounds widespread in living systems. They participate in relevant biological processes, such as metabolic redox reactions, and can photoinduce the oxidation of biomolecules through electron transfer mechanisms.
Thomas, Andrés Héctor, González, Constanza, Oliveros, Esther, Esther Oliveros, Carolina Lorente, Andrés H. Thomas, Lorente, Carolina, Mariana Vignoni, Vicendo, Patricia, M. Laura Dántola, Constanza González, Patricia Vicendo, Vignoni, Mariana, Dantola, Maria Laura   +13 more
core   +1 more source

Tissue Expression Of The 6-Pyruvoyi Tetrahydropterin Synthase Gene In Adult Zebrafish,Danio Rerio. [PDF]

, 2004
Teleost is one of the poikilotherms that can display different kind of colours on their body. This is due to the presence of different types of chromatophores, a group of pigment containing cells that is distributed in the epidermal layer of skin and ...
Tengku Muhammad, Tengku Sifzizul, Chan, Woon Khiong, Kuah, Meng Kiat, Chong, Alexander   +3 more
core   +1 more source

An Enzyme Immunoassay for Neopterin and Biopterin Using a Microtitre Plate Linked with N2-(3-Aminopropyl) Derivatives of Pteridines

Pteridines, 1990
A novel and sensitive enzyme immunoassay for neopterin and biopterin using a microtitre plate has been developed. The antiserum against neopterin or biopterin was incubated with samples prepared from human urine or rat tissues, and was placed in a well ...
Sugimoto Takashi, Ogiwara Shoji, Kiuchi Kazutoshi, Nagatsu Toshiharu, Sakai Masao, Nagatsu Ikuko, Fujita Keisuke   +6 more
doaj   +1 more source

Intracranial calcification in dihydropteridine reductase deficiency

The Turkish Journal of Pediatrics, 1990
We described the clinical status and computerized tomographic findings of two patients with tetrahydrobiopterin (BH4) deficiency due to impaired BH4 regeneration.
T Coşkun, A Besim, I Ozalp, M Eryilmaz
doaj  

Rapid and sensitive method for high-performance liquid chromatographic analysis of pterins in biological fluids

, 1988
A rapid and sensitive high-performance liquid chromatographic (HPLC) method for the analysis of the most important urinary pterins is described. The method involves a preliminary sample oxidation to stabilize and convert pterins into their fluorescent ...
Pontecorvi, Alfredo, Moretti, Fabiola
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