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Updated: Feb 4, 2026

Methods for Evaluating the Role of c-Fos and Dusp1 in Oncogene Dependence
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Published on: January 7, 2019

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Siva-1 emerges as a tissue-specific oncogene beyond its classic role of a proapoptotic gene

Jiri Vachtenheim1, Robert Lischke1, Jiri Vachtenheim2

  • 1Third Department of Surgery, First Faculty of Medicine, Charles University Prague and University Hospital Motol, Prague, Czech Republic.

Oncotargets and Therapy
|October 16, 2018
PubMed

Insights

Siva-1, a protein typically promoting cell death, surprisingly acts as an oncogene in non-small cell lung cancer. Its dual role highlights context-dependent functions in tumor biology.

Area of Science:

  • Molecular Biology
  • Cancer Biology
  • Oncology

Background:

  • Siva-1 is an apoptotic protein often activated by p53, suggesting a tumor-suppressive role.
  • Emerging evidence indicates Siva-1 has apoptosis-independent functions and interacts with non-apoptotic proteins.
  • Siva-1 possesses ARF E3 ubiquitin ligase activity, promoting oncogenesis by upregulating Hdm2 and degrading p53.

Purpose of the Study:

  • To review the diverse activities of Siva-1.
  • To analyze its context-dependent role in tumor biology.
  • To comment on its ambiguous function as an oncogene or tumor suppressor.

Main Methods:

  • Literature review of experimental findings on Siva-1.
  • Analysis of Siva-1's interactions and enzymatic activities.
  • Examination of Siva-1's role in cancer models and human cell lines.

Main Results:

  • Siva-1 exhibits proapoptotic activities in various cell systems.
  • Siva-1's E3 ubiquitin ligase activity is pro-oncogenic, leading to p53 degradation.
  • Absence of Siva-1 prevented non-small cell lung carcinoma development in mice, confirming its oncogenic role in this context.

Conclusions:

  • Siva-1 displays a context-dependent dual role in tumor biology.
  • Its function as an oncogene in non-small cell lung cancer is highlighted.
  • Further research is needed to fully elucidate Siva-1's complex involvement in cancer.
Keywords:
CD27NSCLCSiva-1apoptosisp53

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