Prime-edited Nectin-1 may open a new path for PRV resistance

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Researchers report that prime editing of the porcine Nectin-1 receptor can make pig cells highly resistant to pseudorabies virus, with protection comparable to a full gene knockout, but without removing the protein entirely. The work builds on years of evidence showing that Nectin-1 is a key pseudorabies entry receptor in pigs and other species, and that specific amino acid changes can disrupt viral binding. In this study, the authors used a more precise “functional knockout” strategy, aiming to preserve Nectin-1 structure while blocking the receptor functions the virus depends on. (pubmed.ncbi.nlm.nih.gov)

Why it matters: For veterinary professionals and swine health teams, the study points to a possible future path beyond vaccination and herd-level biosecurity: breeding pigs with targeted antiviral edits that reduce susceptibility to pseudorabies without the broader biological risks that can come with complete gene deletion. That’s notable because pseudorabies remains economically important globally, variant strains have challenged control efforts in parts of Asia since 2011, and in the U.S., commercial herds have been free since 2004 but feral swine remain a reservoir and APHIS is still managing occasional detections. (pubmed.ncbi.nlm.nih.gov)

What to watch: The next question is whether these edits hold up in live pigs, preserve normal animal health and fertility, and fit within regulatory and breeding frameworks for genome-edited livestock. (pubmed.ncbi.nlm.nih.gov)