Expression and Distribution of Nucleoside Transporter Proteins in the Human Syncytiotrophoblast
| Autor: | Marçal Pastor-Anglada, Gloria Riquelme, Ekaitz Errasti-Murugarren, Paula Díaz, Valeria Godoy |
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| Rok vydání: | 2011 |
| Předmět: |
Pharmacology
Base Sequence biology Reverse Transcriptase Polymerase Chain Reaction Blotting Western Nucleoside Transport Proteins Nucleoside transporter Subcellular localization Immunohistochemistry Trophoblasts Cell biology Concentrative nucleoside transporter Syncytiotrophoblast medicine.anatomical_structure Membrane Biochemistry Placenta biology.protein medicine Humans Molecular Medicine Lipid raft Nucleoside DNA Primers |
| Zdroj: | MOLECULAR PHARMACOLOGY Artículos CONICYT CONICYT Chile instacron:CONICYT |
| ISSN: | 1521-0111 0026-895X |
| Popis: | The plasma membrane distribution and related biological activity of nucleoside transporter proteins (NTs) were investigated in human syncytiotrophoblast from term placenta using a variety of approaches, including nucleoside uptake measurements into vesicles from selected plasma membrane domains, NT immunohistochemistry, and subcellular localization (basal, heavy, and light apical membranes as well as raft-enriched membranes from the apical domain). In contrast with other epithelia, in this epithelium, we have identified the high-affinity pyrimidine-preferring human concentrative nucleoside transporter (hCNT) 1 as the only hCNT-type protein expressed at both the basal and apical membranes. hCNT1 localization in lipid rafts is also dependent on its subcellular localization in the apical plasma membrane, suggesting a complex cellular and regional expression. Overall, this result favors the view that the placenta is a pyrimidine-preferring nucleoside sink from both maternal and fetal sides, and hCNT1 plays a major role in promoting pyrimidine salvage and placental growth. This finding may be of pharmacological relevance, because hCNT1 is known to interact with anticancer nucleoside-derived drugs and other molecules, such as nicotine and caffeine, for which a great variety of harmful effects on placental and fetal development, including intrauterine growth retardation, have been reported. |
| Databáze: | OpenAIRE |
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