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Archives of Virology

, Volume 161, Issue 9, pp 2395–2405 | Cite as

HN protein of Newcastle disease virus sensitizes HeLa cells to TNF-α-induced apoptosis by downregulating NF-κB expression

  • R. S. Rajmani
  • Shishir Kumar Gupta
  • Prafull Kumar Singh
  • Ravi Kumar Gandham
  • A. P. Sahoo
  • Uttara Chaturvedi
  • Ashok K. TiwariEmail author
Original Article

Abstract

Hemagglutinin neuraminidase (HN) is a membrane protein of Newcastle disease virus (NDV) with the ability to induce apoptosis in many transformed cell lines. TNF-α is a multi-factorial protein that regulates cell survival, differentiation and apoptosis. In a previous study, we reported that HN protein induces apoptosis by downregulating NF-κB expression. Further, we speculated that downregulation of NF-κB expression might sensitize HeLa cells to TNF-α-mediated apoptosis. Therefore, the present study was undertaken to investigate if HN protein could sensitize HeLa cells to TNF-α and to examine the apoptotic potential of the HN protein and TNF-α in combination. The results revealed that the pro-apoptotic effects were more pronounced with the combination of HN and TNF-α than with HN or TNF-α alone, which indicates that the HN protein indeed sensitized the HeLa cells to TNF-α-induced cell death. The results of the study provide a mechanistic insight into the apoptotic action of HN protein along with TNF-α, which could be valuable in treating tumor types that are naturally resistant to TNF-α.

Keywords

HeLa Cell Mitochondrial Membrane Potential Newcastle Disease Virus Chicken Embryo Fibroblast Hemagglutinin Neuraminidase 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

We are thankful to the director, Indian Veterinary Research Institute, Izatnagar, for providing necessary facilities.

Compliance with ethical standards

Funding

Department of Science and Technology (DST), Government (grant no. SR/SO/AS-0062/2007).

Ethical approval

All applicable national and institutional guidelines for the care and use of animals were followed.

Conflict of interest statement

The authors declare no conflict of interest.

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Copyright information

© Springer-Verlag Wien 2016

Authors and Affiliations

  • R. S. Rajmani
    • 1
    • 2
  • Shishir Kumar Gupta
    • 1
  • Prafull Kumar Singh
    • 1
  • Ravi Kumar Gandham
    • 1
  • A. P. Sahoo
    • 1
  • Uttara Chaturvedi
    • 1
  • Ashok K. Tiwari
    • 1
    Email author
  1. 1.Molecular Biology Lab, Division of Veterinary BiotechnologyIndian Veterinary Research InstituteIzatnagarIndia
  2. 2.Centre for Infectious Disease Research, IIScBangaloreIndia

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