Targeting of tumor radioiodine therapy by expression of the sodium iodide symporter under control of the survivin promoter

Cancer Gene Ther. 2011 Feb;18(2):144-52. doi: 10.1038/cgt.2010.66. Epub 2010 Oct 29.

Abstract

To test the feasibility of using the survivin promoter to induce specific expression of sodium/iodide symporter (NIS) in cancer cell lines and tumors for targeted use of radionuclide therapy, a recombinant adenovirus, Ad-SUR-NIS, that expressed the NIS gene under control of the survivin promoter was constructed. Ad-SUR-NIS mediating iodide uptake and cytotoxicity was performed in vitro. Scintigraphic, biodistribution and radioiodine therapy studies were performed in vivo. PC-3 (prostate); HepG2 (hepatoma) and A375 (melanoma) cancer cells all exhibited perchlorate-sensitive iodide uptake after infection with Ad-SUR-NIS, approximately 50 times higher than that of negative control Ad-CMV-GFP-infected cells. No significant iodide uptake was observed in normal human dental pulp fibroblast (DPF) cells after infection with Ad-SUR-NIS. Clonogenic assays demonstrated that Ad-SUR-NIS-infected cancer cells were selectively killed by exposure to (131)I. Ad-SUR-NIS-infected tumors show significant radioiodine accumulation (13.3 ± 2.85% ID per g at 2 h post-injection), and the effective half-life was 3.1 h. Moreover, infection with Ad-SUR-NIS in combination with (131)I suppressed tumor growth. These results indicate that expression of NIS under control of the survivin promoter can likely be used to achieve cancer-specific expression of NIS in many types of cancers. In combination with radioiodine therapy, this strategy is a possible method of cancer gene therapy.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adenoviridae / genetics
  • Animals
  • Cell Line, Tumor
  • Combined Modality Therapy
  • Genetic Therapy / methods*
  • Humans
  • Inhibitor of Apoptosis Proteins / genetics*
  • Iodine Radioisotopes / pharmacokinetics*
  • Iodine Radioisotopes / therapeutic use*
  • Mice
  • Mice, Inbred BALB C
  • Mice, Nude
  • Neoplasms / genetics
  • Neoplasms / metabolism
  • Neoplasms / radiotherapy
  • Neoplasms / therapy*
  • Promoter Regions, Genetic
  • Survivin
  • Symporters / biosynthesis
  • Symporters / genetics
  • Symporters / metabolism*

Substances

  • BIRC5 protein, human
  • Inhibitor of Apoptosis Proteins
  • Iodine Radioisotopes
  • Survivin
  • Symporters
  • sodium-iodide symporter