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A Novel Strategy of Transferring NIS Protein to Cells Using Extracellular Vesicles Leads to Increase in Iodine Uptake and Cytotoxicity

Overview
Publisher Dove Medical Press
Specialty Biotechnology
Date 2019 Mar 19
PMID 30880979
Citations 16
Authors
Affiliations
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Abstract

Background: This study was designed to explore a novel approach for transferring NIS protein to cells using extracellular vesicle (EV) and enhancing iodine avidity in hepatocellular carcinoma (HCC) cells.

Methods: We transfected the HCC cells (Huh7) with NIS gene, designated as Huh7/NIS, and isolated the EVs from them. Presence of NIS protein in EVs and EV-mediated transport of NIS protein to recipient Huh7 cells were tested using Western blotting. We also examined radioiodine uptake in Huh7 cells treated with EV-Huh7/NIS.

Results: Successful transfer of NIS protein into Huh7 cells was confirmed by WB and microscopy. EVs showed high levels of NIS protein in them. Treatment of Huh7 cells with EV-Huh7/NIS increased the NIS protein level and enhanced I uptake in recipient Huh7 cells. In addition, EV-huh7/NIS pre-treatment enhanced the cytotoxicity of I therapy against Huh7 cells by inducing increased DNA damage/increased γH2A.X foci formation.

Conclusion: This is the first-of-its-kind demonstration of successful transportation of the NIS protein to cells via EVs, which increased radioiodine uptake. This approach can revert radioiodine-resistant cancers into radioiodine-sensitive cancers.

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