Single-cell atlas of rainbow trout peripheral blood leukocytes and profiling of their early response to infectious pancreatic necrosis virus
Frontiers in Immunology, ISSN: 1664-3224, Vol: 15, Page: 1404209
2024
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Reports Outline Infectious Pancreatic Necrosis Virus Study Findings from Animal Health Research Center (CISA-INIA) (Single-cell atlas of rainbow trout peripheral blood leukocytes and profiling of their early response to infectious pancreatic ...)
2024 JUL 19 (NewsRx) -- By a News Reporter-Staff News Editor at NewsRx Life Science Daily -- A new study on infectious pancreatic necrosis virus
Article Description
The recent development of single cell sequencing technologies has revolutionized the state-of-art of cell biology, allowing the simultaneous measurement of thousands of genes in single cells. This technology has been applied to study the transcriptome of single cells in homeostasis and also in response to pathogenic exposure, greatly increasing our knowledge of the immune response to infectious agents. Yet the number of these studies performed in aquacultured fish species is still very limited. Thus, in the current study, we have used the 10x Genomics single cell RNA sequencing technology to study the response of rainbow trout (Oncorhynchus mykiss) peripheral blood leukocytes (PBLs) to infectious pancreatic necrosis virus (IPNV), an important trout pathogen. The study allowed us to obtain a transcriptomic profile of 12 transcriptionally distinct leukocyte cell subpopulations that included four different subsets of B cells, T cells, monocytes, two populations of dendritic-like cells (DCs), hematopoietic progenitor cells, non-specific cytotoxic cells (NCC), neutrophils and thrombocytes. The transcriptional pattern of these leukocyte subpopulations was compared in PBL cultures that had been exposed in vitro to IPNV for 24 h and mock-infected cultures. Our results revealed that monocytes and neutrophils showed the highest number of upregulated protein-coding genes in response to IPNV. Interestingly, IgMIgD and IgT B cells also upregulated an important number of genes to the virus, but a much fainter response was observed in ccl4 or plasma-like cells (irf4 cells). A substantial number of protein-coding genes and genes coding for ribosomal proteins were also transcriptionally upregulated in response to IPNV in T cells and thrombocytes. Interestingly, although genes coding for ribosomal proteins were regulated in all affected PBL subpopulations, the number of such genes transcriptionally regulated was higher in IgMIgD and IgT B cells. A further analysis dissected which of the regulated genes were common and which were specific to the different cell clusters, identifying eight genes that were transcriptionally upregulated in all the affected groups. The data provided constitutes a comprehensive transcriptional perspective of how the different leukocyte populations present in blood respond to an early viral encounter in fish.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85198944591&origin=inward; http://dx.doi.org/10.3389/fimmu.2024.1404209; http://www.ncbi.nlm.nih.gov/pubmed/39035000; https://www.frontiersin.org/articles/10.3389/fimmu.2024.1404209/full; https://dx.doi.org/10.3389/fimmu.2024.1404209; https://www.frontiersin.org/journals/immunology/articles/10.3389/fimmu.2024.1404209/full
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