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- W2080931187 abstract "To explore the potential for use of ligand-conjugated nanocrystals to target cell surface receptors, ion channels, and transporters, we explored the ability of serotonin-labeled CdSe nanocrystals (SNACs) to interact with antidepressant-sensitive, human and Drosophila serotonin transporters (hSERT, dSERT) expressed in HeLa and HEK-293 cells. Unlike unconjugated nanocrystals, SNACs were found to dose-dependently inhibit transport of radiolabeled serotonin by hSERT and dSERT, with an estimated half-maximal activity (EC50) of 33 (dSERT) and 99 μM (hSERT). When serotonin was conjugated to the nanocrystal through a linker arm (LSNACs), the EC50 for hSERT was determined to be 115 μM. Electrophysiology measurements indicated that LSNACs did not elicit currents from the serotonin-3 (5HT3) receptor but did produce currents when exposed to the transporter, which are similar to those elicited by antagonists. Moreover, fluorescent LSNACs were found to label SERT-transfected cells but did not label either nontransfected cells or transfected cells coincubated with the high-affinity SERT antagonist paroxetine. These findings support further consideration of ligand-conjugated nanocrystals as versatile probes of membrane proteins in living cells." @default.
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- W2080931187 date "2002-04-05" @default.
- W2080931187 modified "2023-09-27" @default.
- W2080931187 title "Targeting Cell Surface Receptors with Ligand-Conjugated Nanocrystals" @default.
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- W2080931187 doi "https://doi.org/10.1021/ja003486s" @default.
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