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| http://dx.doi.org/10.1371/journal.ppat.1003548 | DOI Listing |
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Ageing and inflammation limit the induction of SARS-CoV-2-specific CD8+ T cell responses in severe COVID-19.
JCI Insight
January 2025
CNRS UMR 5164, INSERM ERL 1303, ImmunoConcEpT, University of Bordeaux, Bordeaux, France.
CD8+ T cells are critical for immune protection against severe COVID-19 during acute infection with SARS-CoV-2. However, the induction of antiviral CD8+ T cell responses varies substantially among infected people, and a better understanding of the mechanisms that underlie such immune heterogeneity is required for pandemic preparedness and risk stratification. In this study, we analyzed SARS-CoV-2-specific CD4+ and CD8+ T cell responses in relation to age, clinical status, and inflammation among patients infected primarily during the initial wave of the pandemic in France or Japan.
View Article and Find Full Text PDFPrion protein modulation of virus-specific T cell differentiation and function during acute viral infection.
Immunohorizons
January 2025
Center for Virus Research, Chao Family Comprehensive Cancer Center, Department of Molecular Biology and Biochemistry, Charlie Dunlop School of Biological Sciences, University of California, Irvine, Irvine, CA, United States.
The differentiation and functionality of virus-specific T cells during acute viral infections are crucial for establishing long-term protective immunity. While numerous molecular regulators impacting T cell responses have been uncovered, the role of cellular prion proteins (PrPc) remains underexplored. Here, we investigated the impact of PrPc deficiency on the differentiation and function of virus-specific T cells using the lymphocytic choriomeningitis virus (LCMV) Armstrong acute infection model.
View Article and Find Full Text PDFIdentification of an immunological signature of long COVID syndrome.
Front Immunol
January 2025
Neuroimmunology Unit, Santa Lucia Foundation IRCCS, Rome, Italy.
Introduction: Acute COVID-19 infection causes significant alterations in the innate and adaptive immune systems. While most individuals recover naturally, some develop long COVID (LC) syndrome, marked by persistent or new symptoms weeks to months after SARS-CoV-2 infection. Despite its prevalence, there are no clinical tests to distinguish LC patients from those fully recovered.
View Article and Find Full Text PDFKnow Your ABCs: Discovery, Differentiation, and Targeting of T-Bet+ B Cells.
Immunol Rev
March 2025
Department of Immunology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
Since their first description in 2008, T-bet+ B cells have emerged as a clinically important B cell subset. Now commonly known as ABCs (Age-associated B Cells), they are uniquely characterized by their expression of the transcription factor T-bet. Indeed, this singular factor defines this B cell subset.
View Article and Find Full Text PDFTissue-resident memory CD8 T cell diversity is spatiotemporally imprinted.
Nature
January 2025
School of Biological Sciences, Department of Molecular Biology, University of California, San Diego, La Jolla, CA, USA.
Tissue-resident memory CD8 T (T) cells provide protection from infection at barrier sites. In the small intestine, T cells are found in at least two distinct subpopulations: one with higher expression of effector molecules and another with greater memory potential. However, the origins of this diversity remain unknown.
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