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Short Communication: Immune Activation Is Present in HIV-1-Exposed Seronegative Individuals and Is Independent of Microbial Translocation
Author(s) -
Irma Saulle,
Mara Biasin,
Federica Gnudi,
Veronica Rai,
Salomè V. Ibba,
Sergio Lo Caputo,
Francesco Mazzotta,
Daria Trabattoni,
Mario Clerici
Publication year - 2015
Publication title -
aids research and human retroviruses
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.993
H-Index - 92
eISSN - 1931-8405
pISSN - 0889-2229
DOI - 10.1089/aid.2015.0019
Subject(s) - immune system , biology , chromosomal translocation , immunology , lipopolysaccharide , phenotype , human immunodeficiency virus (hiv) , virus , innate immune system , gene , genetics
Analyses of immune activation in HIV-exposed seronegative individuals (HESN) yielded discrepant results. To clarify this issue we performed an extensive investigation of immune parameters in HESN and, in particular, we analyzed in these individuals the possible presence of microbial translocation, the most widely accepted reason driving immune activation in HIV-infected patients. Results showed that immune activation, a skewing of T lymphocyte maturation, and increased responsiveness to lipopolysaccharide (LPS) characterize the HESN phenotype; this is not driven by alterations of the gastrointestinal barrier and microbial translocation. The activation state seen in HESN may influence the induction of stronger adaptive antiviral immune responses and may represent a virus exposure-induced innate immune protective phenotype against HIV.

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