Our previous work has shown that Saffold virus (SAFV) induced several rodent and primate cell lines to undergo apoptosis (Xu et al. in Emerg Microb Infect 3:1–8, 2014), but the essential viral proteins of SAFV involved in apoptotic activity lack study. In this study, we individually transfected the viral proteins of SAFV into HEp-2 and Vero cells to assess their ability to induce apoptosis, and found that the 2B and 3C proteins are proapoptotic. Further investigation indicated the transmembrane domain of the 2B protein is essential for the apoptotic activity and tetramer formation of the 2B protein. Our research provides clues for the possible mechanisms of apoptosis induced by SAFV in different cell lines. It also opens up new directions to study viral proteins (the 2B, 3C protein), and sets the stage for future exploration of any possible link between SAFV, inclusive of its related uncultivable genotypes, and multiple sclerosis.
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This research was fully funded by Temasek Lifesciences Laboratory, an affiliate of National University of Singapore and Nanyang Technological University, Singapore and did not receive any specific grant from any funding agency in the public, commercial, or not-for-profit sectors.
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There is no competing interest in this project.
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This article does not contain any studies with human or animal subjects performed by any of the authors.
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Xu, Y., Victorio, C.B.L., Meng, T. et al. The Saffold Virus-Penang 2B and 3C Proteins, but not the L Protein, Induce Apoptosis in HEp-2 and Vero Cells. Virol. Sin. 34, 262–269 (2019). https://doi.org/10.1007/s12250-019-00116-1
- Saffold virus (SAFV)
- Viral proteins