Immune reconstitution under antiretroviral therapy: the new challenge in HIV-1 infection

Blood ◽  
2011 ◽  
Vol 117 (21) ◽  
pp. 5582-5590 ◽  
Author(s):  
Pierre Corbeau ◽  
Jacques Reynes

AbstractAlthough highly active antiretroviral therapy has enabled constant progress in reducing HIV-1 replication, in some patients who are “aviremic” during treatment, the problem of insufficient immune restoration remains, and this exposes them to the risk of immune deficiency–associated pathologies. Various mechanisms may combine and account for this impaired immunologic response to treatment. A first possible mechanism is immune activation, which may be because of residual HIV production, microbial translocation, co-infections, immunosenescence, or lymphopenia per se. A second mechanism is ongoing HIV replication. Finally, deficient thymus output, sex, and genetic polymorphism influencing apoptosis may impair immune reconstitution. In this review we will discuss the tools at our disposal to identify the various mechanisms at work in a given patient and the specific therapeutic strategies we could propose based on this etiologic diagnosis.

2002 ◽  
Vol 102 (2) ◽  
pp. 154-161 ◽  
Author(s):  
Christoph G. Lange ◽  
Hernan Valdez ◽  
Kathy Medvik ◽  
Robert Asaad ◽  
Michael M. Lederman

2005 ◽  
Vol 191 (3) ◽  
pp. 348-357 ◽  
Author(s):  
Sisse R. Ostrowski ◽  
Terese L. Katzenstein ◽  
Per T. Thim ◽  
Bente K. Pedersen ◽  
Jan Gerstoft ◽  
...  

Blood ◽  
2002 ◽  
Vol 99 (10) ◽  
pp. 3702-3706 ◽  
Author(s):  
Jaime M. Franco ◽  
Amalia Rubio ◽  
Manuel Martı́nez-Moya ◽  
Manuel Leal ◽  
Elena Merchante ◽  
...  

The origin of T cells after highly active antiretroviral therapy (HAART) in patients infected with human immunodeficiency virus 1 (HIV-1) is now under discussion. The possibility of renewed lymphopoiesis in aged thymuses is still controversial. In this work we combine the analysis of naı̈ve T cells, T-cell receptor excision circles (TRECs), and computed tomography scanning of thymic tissue to further assess whether the thymus is involved in immune reconstitution. Fifteen antiretroviral-naı̈ve HIV-1–infected patients were evaluated during 48 weeks of HAART. At baseline, significant correlation was present among age and both thymic volume and TRECs, and between naı̈ve T cells and TRECs. After starting HAART, there was a significant increase at week 12 in naı̈ve CD4+and CD8+ T cells, TRECs, and thymic volume. The initial net increases in naı̈ve T cells and TREC counts were significantly correlated. Changes in thymic volume and TRECs were also indirectly related; splitting the population into 2 groups of high and low baseline TREC levels, only the group with low TREC levels had significant increases in both TRECs and thymic volume. Thus, the increase in thymic volume might be functional, in response to depleted TREC levels. Taken together, our data strongly suggest a thymic role in immune reconstitution, at least in patients with depleted baseline TREC levels.


AIDS ◽  
2003 ◽  
Vol 17 (3) ◽  
pp. 343-351 ◽  
Author(s):  
Yves Levy ◽  
Christine Durier ◽  
Roman Krzysiek ◽  
Claire Rabian ◽  
Catherine Capitant ◽  
...  

2005 ◽  
Vol 191 (6) ◽  
pp. 1027-1027 ◽  
Author(s):  
Massimiliano Lanzafame ◽  
Federica Faggian ◽  
Emanuela Lattuada ◽  
Dario Antolini ◽  
Sandro Vento

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