Abstract:
:Characterization of lymphocytes including B cells during early versus chronic HIV infection is important for understanding the impact of chronic viremia on immune cell function. In this setting, we investigated B cells before and after reduction of HIV plasma viremia by antiretroviral therapy (ART). At baseline, peripheral blood B-cell counts were significantly lower in both early and chronic HIV-infected individuals compared with uninfected controls. Similar to CD4(+) but not CD8(+) T cells, B-cell numbers in both groups increased significantly after ART. At baseline, B cells of early HIV-infected individuals were composed of a higher percentage of plasmablasts and resting memory B cells compared with chronic HIV-infected individuals whose B cells were composed of a higher percentage of immature/transitional and exhausted B cells compared with their early infection counterparts. At 1 year after ART, the percentage of resting memory B cells remained higher in early compared with chronic HIV-infected individuals. This difference translated into a better functional profile in that memory B-cell responses to HIV and non-HIV antigens were superior in early- compared with chronic-treated HIV infected individuals. These findings provide new insights on B cells in HIV infection and how early initiation of ART may prevent irreversible immune system damage.
journal_name
Bloodjournal_title
Bloodauthors
Moir S,Buckner CM,Ho J,Wang W,Chen J,Waldner AJ,Posada JG,Kardava L,O'Shea MA,Kottilil S,Chun TW,Proschan MA,Fauci ASdoi
10.1182/blood-2010-05-285528subject
Has Abstractpub_date
2010-12-16 00:00:00pages
5571-9issue
25eissn
0006-4971issn
1528-0020pii
blood-2010-05-285528journal_volume
116pub_type
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