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Long non-coding RNAs (lncRNAs) are essential components of innate immunity, maintaining the functionality of immune systems that control virus infection. However, how lncRNAs engage immune responses during influenza A virus (IAV) infection remains unclear. Here, we show that lncRNA USP30-AS1 is up-regulated by infection of multiple different IAV subtypes and is required for tuning inflammatory and antiviral response in IAV infection. Genetically inactivation of USP30-AS1 enhances viral protein synthesis and viral growth. USP30-AS1 is an interferon-stimulated gene, and the induction of USP30-AS1 can be achieved by JAK-STAT mediated signaling activation. The immune regulation of USP30-AS1 is independent of its proximal protein-coding gene USP30. In IAV infection, deletion of USP30-AS1 unleashes high systemic inflammatory responses involving a broad range of pro-inflammatory factors, suggesting USP30-AS1 as a critical modulator of immune responses in IAV infection. Furthermore, we established a database providing well-annotated host gene expression profiles IAV infection or immune stimulation.
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http://dx.doi.org/10.1371/journal.ppat.1012854 | DOI Listing |
Emerg Microbes Infect
September 2025
State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, and College of Veterinary Medicine, Jilin University, Changchun 130062, China.
Enveloped viruses rely on matrix proteins for structural integrity and lifecycle progression. Matrix protein 1 (M1) is the most abundant structural protein of influenza A virus (IAV), playing a multifaceted role in viral uncoating, polymerase activity, vRNA transcription and replication, and assembly and budding. The M1 protein not only interacts with host cells but also regulates viral morphogenesis, thereby influencing viral transmissibility and pathogenicity.
View Article and Find Full Text PDFLab Chip
September 2025
Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02215, USA.
CRISPR technology offers an entirely new approach to therapeutic development because it can target specific nucleotide sequences with high specificity, however, preclinical animal models are not useful for evaluation of their efficacy and potential off-target effects because of high gene sequence variations between animals and humans. Here, we explored the potential of using the CRISPR effector Cas13 to develop a new therapeutic approach for influenza A virus (IAV) infections based on its ability to specifically and robustly cleave single-strand viral RNA using a complementary CRISPR RNA (crRNA). We engineered crRNAs to target highly conserved regions in the IAV genome to create a potential pan-viral treatment strategy.
View Article and Find Full Text PDFPLoS Pathog
September 2025
Changchun Veterinary Research Institute, Chinese Academy of Agricultural Sciences, State Key Laboratory of Pathogen and Biosecurity, Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Changchun, China.
In this study, we identified a new chicken-specific protein, named chicken interferon-related antiviral protein (chIRAP) after sequence analysis and comparison, which inhibited the proliferation of various viruses including influenza A virus (IAV) and Newcastle Disease Virus (NDV) in vitro, and chicken embryos with high expression of chIRAP reduced IAV infection. Mass spectrometry analysis of chIRAP interacting proteins and screening of interacting proteins affecting the function of chIRAP revealed that the deletion of endogenous chicken peroxiredoxin 1 (chPRDX1) significantly reduced the antiviral effect of chIRAP. In order to clarify the functional site of chPRDX1 affecting the antiviral effect of chIRAP, we constructed the point mutants of chPRDX1 based on the results of molecular docking (D79A, T90A, K93A, Q94A, R110A, R123A), and screened the sites affecting the antiviral effects of chIRAP by knockdown of endogenous chPRDX1 combined with the overexpression mutant strategy, the results showed that the mutations in the sites affected the antiviral effects of chIRAP to different degrees, with D79A being the most significant, and the D79A mutation of chPRDX1 reduces the ability of chPRDX1 to regulate reactive oxygen species (ROS).
View Article and Find Full Text PDFPLoS Pathog
September 2025
Institute of Medical Virology, University of Zurich, Zurich, Switzerland.
SUMO-modified Tripartite Motif Protein 28 (TRIM28; KAP1) plays a crucial role in repressing endogenous retroelement (ERE) transcription. We previously provided evidence that loss of SUMO-modified TRIM28 triggered by influenza A virus (IAV) infection promotes activation of host antiviral immunity via a mechanism involving derepression of EREs and production of immunostimulatory RNAs. While the IAV NS1 protein might limit consequences of such activation via its dsRNA-binding activity, we hypothesized that other human pathogenic viruses could have evolved more direct strategies to counteract this potential ERE-based defense system.
View Article and Find Full Text PDFmSphere
September 2025
Influenza Division, Centers for Disease Control and Prevention, Atlanta, Georgia, USA.
The ferret model is widely used to study influenza A viruses (IAVs) isolated from multiple avian and mammalian species, as IAVs typically replicate in the respiratory tract of ferrets without the need for prior host adaptation. During standard IAV risk assessments, tissues are routinely collected from ferrets at a fixed time point post-inoculation to assess the capacity for systemic spread. Here, we describe a data set of virus titers in tissues collected from both respiratory tract and extrapulmonary sites 3 days post-inoculation from over 300 ferrets inoculated with more than 100 unique IAVs (inclusive of H1, H2, H3, H5, H7, and H9 IAV subtypes, both mammalian and zoonotic origin).
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