Construction of a tumor‑specific bioluminescent eukaryotic expression vector and analysis of its expression in vitro and in vivo

  • Authors:
    • Qian Chen
    • Fen Li
    • Fuxiang Zhou
    • Wenbo Wang
    • Yu Xu
    • Wenjie Sun
    • Yunfeng Zhou
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  • Published online on: May 8, 2013     https://doi.org/10.3892/ol.2013.1343
  • Pages: 207-211
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Abstract

The aims of this study were to construct a tumor‑specific bioluminescent eukaryotic vector driven by the hTERT gene promoter and to establish a stable HeLa cell line expressing a modified firefly luciferase gene. PhTERTp‑luc and pGL4.17 (luc2/Neo) were digested with SacI and HindIII, respectively, and the recombinant vector phTERTp‑luc‑neo was generated by ligating the desired fragments. The expression of phTERTp‑luc‑neo was tested in a non‑transformed cell line (MRC‑5), and in telomerase‑positive (HeLa, MCF‑7 and 293T) and ‑negative (U2OS and SaOS) transformed cell lines using a luciferase assay. Results showed that the recombinant vector had higher luciferase activity in telomerase‑positive transformed cell lines. PhTERTp‑luc‑neo was transfected into a HeLa cell line, selected by G418 and bioluminescence imaging, and a cell clone HeLa‑luc that constitutively expressed both neomycin and luciferase was obtained. We also conducted experiments in animals to observe luciferase activity in vivo using stable cell lines that were subcutaneously implanted into BALB/c nude mice and tumor growth was monitored by bioluminescence imaging. The HeLa‑luc cell line retained its oncogenicity and tumors were detected on the fifth day following implantation by bioluminescence imaging. This study has formed a basis for the study of the expression and regulation of hTERT and early tumor detection. It also provides a convenient, sensitive and reliable platform for cervical cancer research.
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July 2013
Volume 6 Issue 1

Print ISSN: 1792-1074
Online ISSN:1792-1082

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Spandidos Publications style
Chen Q, Li F, Zhou F, Wang W, Xu Y, Sun W and Zhou Y: Construction of a tumor‑specific bioluminescent eukaryotic expression vector and analysis of its expression in vitro and in vivo. Oncol Lett 6: 207-211, 2013
APA
Chen, Q., Li, F., Zhou, F., Wang, W., Xu, Y., Sun, W., & Zhou, Y. (2013). Construction of a tumor‑specific bioluminescent eukaryotic expression vector and analysis of its expression in vitro and in vivo. Oncology Letters, 6, 207-211. https://doi.org/10.3892/ol.2013.1343
MLA
Chen, Q., Li, F., Zhou, F., Wang, W., Xu, Y., Sun, W., Zhou, Y."Construction of a tumor‑specific bioluminescent eukaryotic expression vector and analysis of its expression in vitro and in vivo". Oncology Letters 6.1 (2013): 207-211.
Chicago
Chen, Q., Li, F., Zhou, F., Wang, W., Xu, Y., Sun, W., Zhou, Y."Construction of a tumor‑specific bioluminescent eukaryotic expression vector and analysis of its expression in vitro and in vivo". Oncology Letters 6, no. 1 (2013): 207-211. https://doi.org/10.3892/ol.2013.1343