Title |
Human Endogenous Retrovirus Expression Is Inversely Associated with Chronic Immune Activation in HIV-1 Infection
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Published in |
PLOS ONE, August 2012
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DOI | 10.1371/journal.pone.0041021 |
Pubmed ID | |
Authors |
Christopher E. Ormsby, Devi SenGupta, Ravi Tandon, Steven G. Deeks, Jeffrey N. Martin, R. Brad Jones, Mario A. Ostrowski, Keith E. Garrison, Joel A. Vázquez-Pérez, Gustavo Reyes-Terán, Douglas F. Nixon |
Abstract |
Human endogenous retroviruses (HERV) are remnants of ancestral retroviral infections integrated into the germ line, and constitute approximately 8% of the genome. Several autoimmune disorders, malignancies, and infectious diseases such as HIV-1 are associated with higher HERV expression. The degree to which HERV expression in vivo results in persistent inflammation is not known. We studied the association of immune activation and HERV-K expression in 20 subjects with chronic, untreated progressive HIV-1 infection and 10 HIV-1 negative controls. The mean HERV-K gag and env RNA expression level in the HIV-1 infected cohort was higher than in the control group (p = 0.0003), and was negatively correlated with the frequency of activated CD38+HLA-DR+CD4+ T cells (Rho = -0.61; p = 0.01) and activated CD38+HLA-DR+CD8+ T cells (Rho = -0.51; p = 0.03). Although HIV-infected persons had higher levels of HERV-K RNA expression (as expected), the level of RNA expression was negatively associated with level of T cell activation. The mechanism for this unexpected association remains to be defined. |
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Mendeley readers
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