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Citation Information: JCI Insight. 2024;9(17):e172261. https://doi.org/10.1172/jci.insight.172261.
Abstract
In humans, lymph nodes are the primary site of measles virus (MeV) replication. To understand the immunological events that occur at this site, we infected human lymphoid tissue explants using a pathogenic strain of MeV that expresses GFP. We found that MeV infected 5%–15% of cells across donors. Using single-cell RNA-Seq and flow cytometry, we found that while most of the 29 cell populations identified in the lymphoid culture were susceptible to MeV, there was a broad preferential infection of B cells and reduced infection of T cells. Further subsetting of T cells revealed that this reduction may be driven by the decreased infection of naive T cells. Transcriptional changes in infected B cells were dominated by an interferon-stimulated gene (ISG) signature. To determine which of these ISGs were most substantial, we evaluated the proteome of MeV-infected Raji cells by mass spectrometry. We found that IFIT1, IFIT2, IFIT3, ISG15, CXCL10, MX2, and XAF1 proteins were the most highly induced and positively correlated with their expression in the transcriptome. These data provide insight into the immunological events that occur in lymph nodes during infection and may lead to the development of therapeutic interventions.
Authors
Joshua A. Acklin, Aum R. Patel, Andrew P. Kurland, Shu Horiuchi, Arianna S. Moss, Emma J. DeGrace, Satoshi Ikegame, Jillian Carmichael, Shreyas Kowdle, Patricia A. Thibault, Naoko Imai, Hideki Ueno, Benjamin Tweel, Jeffrey R. Johnson, Brad R. Rosenberg, Benhur Lee, Jean K. Lim
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