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Mol Ther Oncolytics. 2021 Apr 29;23:38-50. doi: 10.1016/j.omto.2021.04.014. eCollection 2021 Dec 17.

Induction of cell death in ovarian cancer cells by doxorubicin and oncolytic vaccinia virus is associated with CREB3L1 activation.

Molecular therapy oncolytics

Anna Mistarz, Matthew Graczyk, Marta Winkler, Prashant K Singh, Eduardo Cortes, Anthony Miliotto, Song Liu, Mark Long, Li Yan, Aimee Stablewski, Kieran O'Loughlin, Hans Minderman, Kunle Odunsi, Hanna Rokita, A J Robert McGray, Emese Zsiros, Danuta Kozbor

Affiliations

  1. Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA.
  2. Center for Personalized Medicine, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA.
  3. Department of Biostatistics and Bioinformatics, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA.
  4. Department of Gynecologic Oncology, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA.
  5. Department of Molecular and Cellular Biology, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA.
  6. Department of Flow and Image Cytometry, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA.
  7. Faculty of Biochemistry, Biophysics, and Biotechnology, Jagiellonian University, Kraków, Poland.

PMID: 34632049 PMCID: PMC8479291 DOI: 10.1016/j.omto.2021.04.014

Abstract

We have demonstrated that oncolytic vaccinia virus synergizes with doxorubicin (DOX) in inducing immunogenic cell death in platinum-resistant ovarian cancer cells and increases survival in syngeneic and xenograft tumor models. However, the mechanisms underlying the virus- and doxorubicin-mediated cancer cell death remain unknown. In this study, we investigated the effect of the oncolytic virus and doxorubicin used alone or in combination on activation of the cytoplasmic transcription factor CREB3L1 (cyclic AMP [cAMP] response element-binding protein 3-like 1) in ovarian cancer cell lines and clinical specimens. We demonstrated that doxorubicin-mediated cell death in ovarian cancer cell lines was associated with nuclear translocation of CREB3L1 and that the effect was augmented by infection with oncolytic vaccinia virus or treatment with recombinant interferon (IFN)-β used as a viral surrogate. This combination treatment was also effective in mediating nuclear translocation of CREB3L1 in cancer cells isolated from ovarian tumor biopsies at different stages of disease progression. The measurement of CREB3L1 expression in clinical specimens of ovarian cancer revealed lack of correlation with the stage of disease progression, suggesting that understanding the mechanisms of nuclear accumulation of CREB3L1 after doxorubicin treatment alone or in combination with oncolytic virotherapy may lead to the development of more effective treatment strategies against ovarian cancer.

© 2021 The Authors.

Keywords: CREB3L1; IFN-β; doxorubicin; oncolytic vaccinia virus; ovarian cancer

Conflict of interest statement

The authors declare no competing interests.

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