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Updated: Apr 28, 2026

Rescue of Recombinant Newcastle Disease Virus from cDNA
Published on: October 11, 2013
The interferon-inducible antiviral protein Daxx is not essential for interferon-mediated protection against avian
Kelsey A Haugh, Natalia Shalginskikh, Shoko Nogusa
1Immune Cell Development and Host Defense Program, Fox Chase Cancer Center, Room 422 Reimann Building, 333 Cottman Ave,, 19111 Philadelphia, PA, USA. richard.katz@fccc.edu.
Background:
The antiviral protein Daxx acts as a restriction factor of avian sarcoma virus (ASV; Retroviridae) in mammalian cells by promoting epigenetic silencing of integrated proviral DNA. Although Daxx is encoded by a type I (α/β) interferon-stimulated gene, the requirement for Daxx in the interferon anti-retroviral response has not been elucidated. In this report, we describe the results of experiments designed to investigate the role of Daxx in the type I interferon-induced anti-ASV response.
Findings:
Using an ASV reporter system, we show that type I interferons are potent inhibitors of ASV replication. We demonstrate that, while Daxx is necessary to silence ASV gene expression in the absence of interferons, type I interferons are fully-capable of inducing an antiviral state in the absence of Daxx.
Conclusions:
These results provide evidence that Daxx is not essential for the anti-ASV interferon response in mammalian cells, and that interferons deploy multiple, redundant antiviral mechanisms to protect cells from ASV.
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