Decreased Nucleoside Transport and hENT1 Transporter Expression in Beta-Thalassemia Major

Decreased erythrocyte nucleoside transport and hENT1 transporter expression in glucose 6-phosphate dehydrogenase deficiency

BACKGROUND Glucose-6-phosphate dehydrogenase (G6PD) deficiency is associated with erythrocyte sensitivity to oxidative damage and hemolytic crises. In β-thalassemia major, where hemoglobin instability imposes oxidative stress, erythrocytes show reduced hENT1 nucleoside transporter expression and decreased nucleoside uptake. This study investigated hENT1 expression and nucleoside transport in G6...

Nucleobase transport by human equilibrative nucleoside transporter 1 (hENT1).

The human equilibrative nucleoside transporters hENT1 and hENT2 (each with 456 residues) are 40% identical in amino acid sequence and contain 11 putative transmembrane helices. Both transport purine and pyrimidine nucleosides and are distinguished functionally by a difference in sensitivity to inhibition by nanomolar concentrations of nitrobenzylmercaptopurine ribonucleoside (NBMPR), hENT1 bein...

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Endocrine Disorders in Beta thalassemia Major Patients

Background Thalassemia is the most common hereditary disorder worldwide. The patient's’ survival is dependent on lifetime blood transfusion which leads to iron overload and its toxicity on various organs including endocrine glands. The study aimed to investigate endocrine disorders in patients with Beta-thalassemia major in the Southern Khorasan province, Iran. Materials and Methods In this des...

Functional production and reconstitution of the human equilibrative nucleoside transporter (hENT1) in Saccharomyces cerevisiae. Interaction of inhibitors of nucleoside transport with recombinant hENT1 and a glycosylation-defective derivative (hENT1/N48Q).

We have produced recombinant human equilibrative nucleoside transporter (hENT1) in the yeast Saccharomyces cerevisiae and have compared the binding of inhibitors of equilibrative nucleoside transport with the wild-type transporter and a N-glycosylation-defective mutant transporter. Equilibrium binding of 3H-labelled nitrobenzylmercaptopurine ribonucleoside {6-[(4-nitrobenzyl)thio]-9-beta-d-ribo...