Results 41 to 50 of about 20,168 (266)

Altered deoxyribonucleotide pools in T-lymphoblastoid cells expressing the multisubstrate nucleoside kinase of Drosophila melanogaster [PDF]

open access: yes, 2005
The multisubstrate nucleoside kinase of Drosophila melanogaster (Dm-dNK) can be expressed in human solid tumor cells and its unique enzymatic properties makes this enzyme a suicide gene candidate.
Balzarini, J   +4 more
core   +1 more source

Inverse enzyme isotope effects in human purine nucleoside phosphorylase with heavy asparagine labels

open access: yesProceedings of the National Academy of Sciences of the United States of America, 2018
Significance Enzymes achieve catalytic efficiency by optimizing contacts between reactants and catalytic site amino acids. The transition state forms rarely, with a lifetime of a few femtoseconds.
R. Harijan   +4 more
semanticscholar   +1 more source

Design and Synthesis of New Modified Flexible Purine Bases as Potential Inhibitors of Human PNP

open access: yesMolecules, 2023
The great interest in studying the structure of human purine nucleoside phosphorylase (hPNP) and the continued search for effective inhibitors is due to the importance of the enzyme as a target in the therapy of T-cell proliferative diseases. In addition,
Anastasia Khandazhinskaya   +7 more
doaj   +1 more source

Upregulation of inducible NO synthase by exogenous adenosine in vascular smooth muscle cells activated by inflammatory stimuli in experimental diabetes [PDF]

open access: yes, 2016
BACKGROUND: Adenosine has been shown to induce nitric oxide (NO) production via inducible NO synthase (iNOS) activation in vascular smooth muscle cells (VSMCs). Although this is interpreted as a beneficial vasodilating pathway in vaso-occlusive disorders,
Cignarella, Andrea   +4 more
core   +2 more sources

Intracellular Delivery of Human Purine Nucleoside Phosphorylase by Engineered Diphtheria Toxin Rescues Function in Target Cells.

open access: yesMolecular Pharmaceutics, 2018
Despite a wealth of potential applications inside target cells, protein-based therapeutics are largely limited to extracellular targets due to the inability of proteins to readily cross biological membranes and enter the cytosol.
Minyoung Park   +8 more
semanticscholar   +1 more source

Energy metabolism during the maturation of reticulocyte in vitro [PDF]

open access: yes, 1968
1. For the purpose to clarify the mechanism of the revolutional changes in energy metabolism during the reticulocyte maturation the metabolisms of glucose and of the pentose moieties of acid soluble nucleotides have been observed on rabbit reticulocytes ...
Hayashi, Kenji   +5 more
core   +1 more source

De novo assembly and transcriptome analysis of Plasmodium gallinaceum identifies the Rh5 interacting protein (ripr), and reveals a lack of EBL and RH gene family diversification [PDF]

open access: yes, 2015
BACKGROUND: Malaria parasites that infect birds can have narrow or broad host-tropisms. These differences in host specificity make avian malaria a useful model for studying the evolution and transmission of parasite assemblages across geographic ranges ...
Lauron, Elvin J   +3 more
core   +13 more sources

Propolis Exerts an Anti-Inflammatory Effect on PMA-Differentiated THP-1 Cells via Inhibition of Purine Nucleoside Phosphorylase

open access: yesMetabolites, 2019
Previous research has shown that propolis has immunomodulatory activity. Propolis extracts from different geographic origins were assessed for their anti-inflammatory activities by investigating their ability to alter the production of tumour necrosis ...
Abdulmalik M. Alqarni   +6 more
semanticscholar   +1 more source

A specific adenosine phosphorylase, distinct from purine nucleoside phosphorylase

open access: yesFEBS Letters, 1976
Several enzymes, catalyzing the reversible phosphorolysis of purine nucleosides have been described in eucaryotic cells and in micro-organisms [l-6] . The best known is the ‘purine nucleoside phosphorylase’ (EC 2.4.2.1) acting on the nucleosides of hypoxanthine and guanine. Adenosine is not used as substrate by this enzyme [6-81.
SENESI, SONIA   +4 more
openaire   +6 more sources

Investigating the Role of Guanosine on Human Neuroblastoma Cell Differentiation and the Underlying Molecular Mechanisms

open access: yesFrontiers in Pharmacology, 2021
Neuroblastoma arises from neural crest cell precursors failing to complete the process of differentiation. Thus, agents helping tumor cells to differentiate into normal cells can represent a valid therapeutic strategy.
Natale Belluardo   +13 more
doaj   +1 more source

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