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Synergistic inhibitory effect of resveratrol and TK/GCV therapy on melanoma cells

  • Original Article – Cancer Research
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Abstract

Purpose

To investigate the synergistic effect of resveratrol on the bystander effect of TK/GCV suicide gene system in melanoma cells.

Methods

The effect of resveratrol on the growth of B16 cells and the synergistic effect of resveratrol with or without GCV were detected by MTT assay and high content screening assay. The effect of resveratrol on GJIC function was detected by flow cytometry combined with fluorescence tracer and fluorescence microscope, and the expression of gap junction protein was detected by western blotting. Synergistic killing effect of resveratrol plus TK/GCV was tested in vivo using transplanted melanoma model.

Results

In vitro, resveratrol can enhanced GJ function and upregulated Cx32 and Cx43 protein expression in B16 cells. Resveratrol synergized with GCV to kill mixed B16 melanoma cells (20% TK+ cells and 80% TK cells) and to improve apoptosis rate of TK cells (the bystander effect of TK system), and the synergistic action was reversed by the GJ inhibitor AGA. In vivo, when B16 cells were mixed with 30% TK+ B16 cells, significantly reduced tumor weight and volume were observed after combinational treatment with resveratrol plus GCV as compared with GCV or resveratrol treatment alone.

Conclusions

Resveratrol could synergistically enhance the killing effect of TK/GCV suicide gene system in melanoma B16 cells and transplanted melanoma. It might be a promising adjuvant of TK/GCV therapy.

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Funding

This work was supported by grants from the National Natural Science Foundation of China (Grant Nos. 81774028, 81873146, 81903606), and Natural Science Foundation of Guangdong Province (2017A030310542).

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Authors and Affiliations

Authors

Contributions

YT and BD conceived and designed the study, provided technical guidance during experiments. YC, HL, YW, GZ, JL, PQ and LS carried out in vitro experiments and analyzed experimental results. YW, XL, JL and YT carried out in vivo experiments and analyzed experimental results. YC, HL and YT wrote the paper. YT and JX reviewed and edited the manuscript. All authors read and approved the final manuscript for publication.

Corresponding authors

Correspondence to Biaoyan Du or Yuhui Tan.

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Conflict of interest

The authors declare no conflict of interest.

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Cite this article

Chen, Y., Li, H., Zhang, G. et al. Synergistic inhibitory effect of resveratrol and TK/GCV therapy on melanoma cells. J Cancer Res Clin Oncol 146, 1489–1499 (2020). https://doi.org/10.1007/s00432-020-03203-z

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  • DOI: https://doi.org/10.1007/s00432-020-03203-z

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