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Osimertinib is a dual inhibitor of hepatocellular carcinoma and angiogenesis in an EGFR-independent manner, and synergizes with venetoclax

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Abstract

Background

To investigate the effects of osimertinib on hepatocellular carcinoma (HCC) and angiogenesis, and its combinatory effects with venetoclax in HCC.

Methods

Viability was assessed by flow cytometry of Annexin V in multiple HCC cell lines after drug treatment. In vitro angiogenesis assay was performed using primary human liver tumor associated endothelial cell (HLTEC). HCC-bearing model was generated by subcutaneous implantation of Hep3B cells to investigate the efficacy of osimertinib alone and its combination with venetoclax.

Results

Osimertinib significantly induced apoptosis in a panel of HCC cell lines regardless of EGFR expression level. It inhibited capillary network formation and induced apoptosis in HLTEC. Using HCC xenograft mouse model, we further showed that osimertinib at non-toxic dose inhibited tumor growth by ~ 50% and remarkably decreased blood vessel in tumor. Mechanism studies demonstrated that osimertinib acted on HCC cells in an EGFR-independent manner. It decreased level of VEGF and Mcl-1 in HCC cells via suppressed phosphorylation of eIF4E, thus leading to inhibition of eIF4E-mediated translation. Mcl-1 overexpression reversed pro-apoptotic effect of osimertinib, suggesting an important role of Mcl-1 in osimertinib’s action in HCC cells. Of note, the combination of osimertinib and venetoclax achieved approximately complete HCC cell death and tumor growth in mice.

Conclusions

We provide pre-clinical evidence that osimertinib is a promising candidate for the treatment of HCC via targeting tumor cells and angiogenesis. The combination of osimertinib and venetoclax is synergistic in inhibiting HCC.

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Data availability

Data will be made available upon reasonable request the corresponding author.

References

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Acknowledgements

Not applicable.

Funding

This work was supported by research grants provided by Health Commission of Hubei Province (Grant No. WJ2019F094).

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Authors and Affiliations

Authors

Contributions

 Qiaoxin Huang and Dongang Zhan designed the concept, performed experiment and wrote the manuscript altogether. Shengsong He performed the experiment.

Corresponding author

Correspondence to Dongang Zhan.

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Conflict of interest

All authors report no conflict of interest.

Ethical approval

Animal studies were approved by the Institutional Animal Care and Use Committee of Hubei University of Arts and Science and conducted in accordance with the Guide for the Care and Use of Laboratory Animals published by the US National Institutes of Health (Publication No. 85–23, revised 1996).

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Huang, Q., He, S. & Zhan, D. Osimertinib is a dual inhibitor of hepatocellular carcinoma and angiogenesis in an EGFR-independent manner, and synergizes with venetoclax. J Cancer Res Clin Oncol 149, 10727–10735 (2023). https://doi.org/10.1007/s00432-023-04926-5

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  • DOI: https://doi.org/10.1007/s00432-023-04926-5

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