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Enhanced RNAi does not provide efficient innate antiviral immunity in mice.
Nucleic Acids Res
January 2025
Laboratory of Epigenetic Regulations, Institute of Molecular Genetics of the Czech Academy of Sciences, Videnska 1083, 142 20, Prague, Czech Republic.
In RNA interference (RNAi), long double-stranded RNA is cleaved by the Dicer endonuclease into small interfering RNAs (siRNAs), which guide degradation of complementary RNAs. While RNAi mediates antiviral innate immunity in plants and many invertebrates, vertebrates have adopted a sequence-independent response and their Dicer produces siRNAs inefficiently because it is adapted to process small hairpin microRNA precursors in the gene-regulating microRNA pathway. Mammalian endogenous RNAi is thus a rudimentary pathway of unclear significance.
View Article and Find Full Text PDFEvaluating Antigen- and Vector-Specific Immune Responses of a Recombinant Pichinde Virus-Based Vaccine Expressing the Lymphocytic Choriomeningitis Virus Nucleoprotein.
Vaccines (Basel)
December 2024
Department of Veterinary and Biomedical Sciences, College of Veterinary Medicine, University of Minnesota, Saint Paul, MN 55108, USA.
Background: Live viral vector-based vaccines are known to elicit strong immune responses, but their use can be limited by anti-vector immunity. Here, we analyzed the immunological responses of a live-attenuated recombinant Pichinde virus (PICV) vector platform (rP18tri).
Methods: To evaluate anti-PICV immunity in the development of vaccine antigen-specific immune responses, we generated a rP18tri-based vaccine expressing the lymphocytic choriomeningitis virus (LCMV) nucleoprotein (NP) and administered four doses of this rP18tri-NPLCMV vaccine to mice.
Pathogenicity of tick-derived lymphocytic choriomeningitis virus in BALB/c mice.
BMC Vet Res
January 2025
Laboratory of Pathogen Microbiology and Immunology, College of Life Science, Jilin Agricultural University, Changchun, Jilin Province, China.
Background: Lymphocytic choriomeningitis virus (LCMV) is a zoonotic pathogen primarily transmitted by rodents. Recently, LCMV has been detected in ticks from northeastern China; however, the pathogenicity of this virus in murine models remains to be elucidated.
Results: Here, we examined the tick-derived LCMV strain JX14 by inoculating BALB/c mice with 3.
Protein Phosphatase 2A Promotes CD8 T Cell Effector Function through the Augmentation of CD28 Costimulation.
Research (Wash D C)
January 2025
Department of Cardiology of The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China.
Protein phosphatase 2A (PP2A) is one of the most abundant serine/threonine phosphatases and plays critical roles in regulating cell fate and function. We previously showed that PP2A regulates the differentiation of CD4 T cells and the development of thymocytes. Nevertheless, its role in CD8 T cells remains elusive.
View Article and Find Full Text PDFEfficient gene deletion of Integrin alpha 4 in primary mouse CD4 T cells using CRISPR RNA pair-mediated fragmentation.
Front Immunol
December 2024
Department of Microbiology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.
The functional specialization of CD4 T lymphocytes into various subtypes, including T1 and T cells, is crucial for effective immune responses. T cells facilitate B cell differentiation within germinal centers, while T1 cells are vital for cell-mediated immunity against intracellular pathogens. Integrin α4, a cell surface adhesion molecule, plays significant roles in cell migration and co-stimulatory signaling.
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