Published in:
01-11-2009 | Original Article
Effective treatment of pancreatic neuroendocrine tumours transfected with the sodium iodide symporter gene by 186Re-perrhenate in mice
Authors:
Christoph G. U. Riese, Stephan Seitz, Meike L. Schipper, Thomas M. Behr
Published in:
European Journal of Nuclear Medicine and Molecular Imaging
|
Issue 11/2009
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Abstract
Purpose
ReO
4
−
has similar kinetics regarding the sodium iodide symporter (NIS) to I− and TcO
4
−
in NIS-expressing tissue. We investigated the therapeutic potential of 186ReO
4
−
in NIS-transfected neuroendocrine tumour tissue.
Methods
For experiments, the stably NIS-transfected pancreatic neuroendocrine cancer cell line Bon1C was used. NIS-mediated internalization and externalization experiments in vitro and a biodistribution study in nude mice bearing Bon1C xenografts were performed. A therapy study was also conducted consecutively in nude mice xenografted with Bon1C in which the mice were injected intravenously with Na186ReO4.
Results
In vitro studies showed exponential internalization and efflux kinetics of 186ReO
4
−
in the cell line. The biodistribution study showed high uptake of 186ReO
4
−
in NIS-expressing tumours. Tumour growth inhibition was significant after injection of 186ReO4 in two groups of animals treated with activity levels below the determined maximum tolerable activity as compared to controls.
Conclusion
These results indicate that the use of 186ReO
4
−
in the treatment of NIS-expressing neuroendocrine tumours is feasible and support the concept of using NIS as a therapeutic target for 186ReO
4
−
.