Open Access

Detection of metastatic tumors after γ-irradiation using longitudinal molecular imaging and gene expression profiling of metastatic tumor nodules

  • Authors:
    • Su Jin Jang
    • Joo Hyun Kang
    • Yong Jin Lee
    • Kwang Il Kim
    • Tae Sup Lee
    • Jae Gol Choe
    • Sang Moo Lim
  • View Affiliations

  • Published online on: February 8, 2016     https://doi.org/10.3892/ijo.2016.3384
  • Pages: 1361-1368
  • Copyright: © Jang et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

A few recent reports have indicated that metastatic growth of several human cancer cells could be promoted by radiotherapy. C6-L cells expressing the firefly luciferase (fLuc) gene were implanted subcutaneously into the right thigh of BALB/c nu/nu mice. C6-L xenograft mice were treated locally with 50-Gy γ-irradiation (γ-IR) in five 10-Gy fractions. Metastatic tumors were evaluated after γ-IR by imaging techniques. Total RNA from non-irradiated primary tumor (NRPT), γ-irradiated primary tumor (RPT), and three metastatic lung nodule was isolated and analyzed by microarray. Metastatic lung nodules were detected by BLI and PET/CT after 6-9 weeks of γ-IR in 6 (17.1%) of the 35 mice. The images clearly demonstrated high [18F]FLT and [18F]FDG uptake into metastatic lung nodules. Whole mRNA expression patterns were analyzed by microarray to elucidate the changes among NRPT, RPT and metastatic lung nodules after γ-IR. In particular, expression changes in the cancer stem cell markers were highly significant in RPT. We observed the metastatic tumors after γ-IR in a tumor-bearing animal model using molecular imaging methods and analyzed the gene expression profile to elucidate genetic changes after γ-IR.
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April 2016
Volume 48 Issue 4

Print ISSN: 1019-6439
Online ISSN:1791-2423

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APA
Jang, S.J., Kang, J.H., Lee, Y.J., Kim, K.I., Lee, T.S., Choe, J.G., & Lim, S.M. (2016). Detection of metastatic tumors after γ-irradiation using longitudinal molecular imaging and gene expression profiling of metastatic tumor nodules. International Journal of Oncology, 48, 1361-1368. https://doi.org/10.3892/ijo.2016.3384
MLA
Jang, S. J., Kang, J. H., Lee, Y. J., Kim, K. I., Lee, T. S., Choe, J. G., Lim, S. M."Detection of metastatic tumors after γ-irradiation using longitudinal molecular imaging and gene expression profiling of metastatic tumor nodules". International Journal of Oncology 48.4 (2016): 1361-1368.
Chicago
Jang, S. J., Kang, J. H., Lee, Y. J., Kim, K. I., Lee, T. S., Choe, J. G., Lim, S. M."Detection of metastatic tumors after γ-irradiation using longitudinal molecular imaging and gene expression profiling of metastatic tumor nodules". International Journal of Oncology 48, no. 4 (2016): 1361-1368. https://doi.org/10.3892/ijo.2016.3384