Why the study?
Classical pestivirus outbreaks cause substantial livestock losses, and DNAJC14 has been identified in vitro as a core host protein for their replicative cycle.
CRISPR/Cas9 gene editing of DNAJC14 in pigs confers complete resistance to classical pestiviruses, offering a novel strategy for disease control in livestock.
Targeting DNAJC14 may enable antiviral strategies for pestiviruses; in vitro findings leave open in vivo and field validation.
Infectious diseases remain a major impediment to livestock production, negatively impacting both productivity and welfare. Where key interactions between viruses and host proteins have been identified, it is possible to rationally devise intervention strategies. In vitro studies have identified the host protein DNAJC14 as a core component of the replicative cycle of classical pestiviruses. Outbreaks caused by this group of viruses cause enormous losses in stock farming due to culling and export restrictions. Using CRISPR/Cas9 gene editing, we produced a cohort of pigs with altered DNAJC14. Primary cells from these animals did not support replication of either classical swine fever virus (CSFV) or bovine viral diarrhoea virus (BVDV) in vitro. In vivo challenge with CSFV revealed that the edited pigs displayed complete resistance to infection. This establishes gene editing as an additional strategy that can contribute to the control of classical pestiviruses.
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Crooke et al. (2025) studied this question.
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