NK-cell phenotype at interruption underlies widely divergent duration of CD4+-guided antiretroviral treatment interruption.

Abstract:

:Long-term side effects may represent a relevant burden of antiretroviral treatment (ART) in HIV-infected patients with good CD4 immune reconstitution over extended time spans. CD4-guided treatment interruption (TI) has been evaluated to address this point and may result in a wide spectrum of time off ART in different patient cohorts. We studied whether differences in innate immune responses, in particular NK cells, are associated to patterns of longer (LoTI) or a shorter (ShTI) TI. Clinical cohort parameters were analyzed on a group of patients widely diverging for TI duration (<9 versus >18 months) on samples before TI, including NK-cell analysis and function by natural cytotoxicity receptor (NCR)-triggered γ-IFN production. Although persistently reduced NCR expression (NKp30) and function were observed in both LoTI and ShTI patients on ART compared with healthy donors, relevant differences were observed at baseline TI in those patients who subsequently developed LoTI course. Lower expression of NKG2D and NKp46 on NK cells. This also translates in reduced γ-IFN production in redirected functional assays. Thus, differences in innate immune balance exist during ART, may be associated to differential control of HIV infection and their understanding could explain clinical differences in individual patients that are not reflected by CD4(+) cell counts alone.

journal_name

Int Immunol

journal_title

International immunology

authors

Bozzano F,Nasi M,Bertoncelli L,Nemes E,Prati F,Marras F,Mussini C,Moretta L,Cossarizza A,De Maria A

doi

10.1093/intimm/dxq462

subject

Has Abstract

pub_date

2011-02-01 00:00:00

pages

109-18

issue

2

eissn

0953-8178

issn

1460-2377

pii

dxq462

journal_volume

23

pub_type

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