Chang, J. Judy;
Woods, Matt;
Lindsay, Robert J.;
Doyle, Erin H.;
Griesbeck, Morgane;
Chan, Ellen S.;
Robbins, Gregory K.;
Bosch, Ronald J.;
Altfeld, Marcus
Higher Expression of Several Interferon-Stimulated Genes in HIV-1-Infected Females After Adjusting for the Level of Viral Replication
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Medientyp:
E-Artikel
Titel:
Higher Expression of Several Interferon-Stimulated Genes in HIV-1-Infected Females After Adjusting for the Level of Viral Replication
Beteiligte:
Chang, J. Judy;
Woods, Matt;
Lindsay, Robert J.;
Doyle, Erin H.;
Griesbeck, Morgane;
Chan, Ellen S.;
Robbins, Gregory K.;
Bosch, Ronald J.;
Altfeld, Marcus
Beschreibung:
<p>Background. Clinical studies have shown faster disease progression and stronger immune activation in human immunodeficiency virus (HIV)-1-infected females when compared with males for the same level of HIV-1 replication. Here we determine whether the elevated levels of HIV-1-induced interferon-alpha (IFN-α) production observed in females are associated with higher interferon-stimulated gene (ISG) expression levels in T cells, hence suggesting type-I IFN as a mechanism for the higher HIV-1-associated immune activation observed. Methods. T-cell and dendritic cell populations were isolated from treatment-naive chronically HIV-1-infected individuals enrolled in the Adult Clinical Trials Group 384 by fluorescence-activated cell sorting. The expression of 98 genes involved in Toll-like receptor and type I IFN signaling pathways were quantified using Nanostring technology. Results. Several ISGs were significantly correlated with HIV-1 viral load and/or CD4⁺ T-cell count. Higher expression levels of a subset of these ISGs were observed in cells derived from females as compared to males after adjusting for viral load and were correlated to higher levels of T-cell activation. Conclusion. These data show that higher IFN-α production is associated with higher ex vivo expression of several ISGs in females. This might contribute to higher levels of immune activation and the observed faster HIV-1 disease progression in females for a given level of viral replication.</p>