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- W2149642202 abstract "ABSTRACT Human immunodeficiency virus (HIV) and hepatitis C virus (HCV) cause clinically important persistent infections. The effects of virus persistence on innate immunity, including NK cell responses, and the underlying mechanisms are not fully understood. We examined the frequency, phenotype, and function of peripheral blood CD3 − CD56 + NK subsets in HIV + and HCV + patients and identified significantly reduced numbers of total NK cells and a striking shift in NK subsets, with a marked decrease in the CD56 dim cell fraction compared to CD56 bright cells, in both infections. This shift influenced the phenotype and functional capacity (gamma interferon production, killing) of the total NK pool. In addition, abnormalities in the functional capacity of the CD56 dim NK subset were observed in HIV + patients. The shared NK alterations were found to be associated with a significant reduction in serum levels of the innate cytokine interleukin 15 (IL-15). In vitro stimulation with IL-15 rescued NK cells of HIV + and HCV + patients from apoptosis and enhanced proliferation and functional activity. We hypothesize that the reduced levels of IL-15 present in the serum during HIV and HCV infections might impact NK cell homeostasis, contributing to the common alterations of the NK pool observed in these unrelated infections." @default.
- W2149642202 created "2016-06-24" @default.
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- W2149642202 date "2005-10-01" @default.
- W2149642202 modified "2023-10-17" @default.
- W2149642202 title "Shared Alterations in NK Cell Frequency, Phenotype, and Function in Chronic Human Immunodeficiency Virus and Hepatitis C Virus Infections" @default.
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- W2149642202 doi "https://doi.org/10.1128/jvi.79.19.12365-12374.2005" @default.
- W2149642202 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/1211534" @default.
- W2149642202 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/16160163" @default.
- W2149642202 hasPublicationYear "2005" @default.
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