Elevated interleukin-7 levels not sufficient to maintain T-cell homeostasis during simian immunodeficiency virus-induced disease progression

Alagarraju Muthukumar, Aneta Wozniakowski, Marie Claire Gauduin, Mirko Paiardini, Harold M. McClure, R. Paul Johnson, Guido Silvestri, Donald L. Sodora

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

Elevated levels of interleukin 7 (IL-7) have been correlated with various T-cell depletion conditions, including HIV infection, and suggested as an indicator of HIV disease progression (AIDS and death). Here, the assessment of pathogenic simian immunodeficiency virus (SIVmac239) infection in rhesus macaques demonstrated a clear association between a significant elevation in IL-7 levels and disease progression. In 5 macaques that progressed to simian AIDS and death, elevated IL-7 levels were unable to restore T-cell homeostasis. In contrast, increased IL-7 levels were followed by relatively high and stable T-cell numbers in the SIV-infected macaques with a slow-progressing phenotype. Further, studies in sooty mangabeys that do not progress to simian AIDS and that maintain stable T-cell numbers despite high levels of viral replication support the importance of IL-7 and T-cell homeostasis in disease progression. These data suggest that during pathogenic SIV infection with high viral replication, elevated IL-7 levels are unable to recover T-cell homeostasis, thereby leading to disease progression. The utility of IL-7 as a potential immunotherapeutic agent to improve HIV/SIV-related T-cell depletion may therefore depend on controlling the pathogenic effects of viral replication prior to the administration of IL-7.

Original languageEnglish (US)
Pages (from-to)973-979
Number of pages7
JournalBlood
Volume103
Issue number3
DOIs
StatePublished - Feb 1 2004

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Interleukin-7
Simian Immunodeficiency Virus
T-cells
Virus Diseases
Viruses
Disease Progression
Homeostasis
T-Lymphocytes
Simian Acquired Immunodeficiency Syndrome
Macaca
Cercocebus atys
Cell Count
HIV
Macaca mulatta
HIV Infections
Acquired Immunodeficiency Syndrome
Phenotype

ASJC Scopus subject areas

  • Hematology

Cite this

Elevated interleukin-7 levels not sufficient to maintain T-cell homeostasis during simian immunodeficiency virus-induced disease progression. / Muthukumar, Alagarraju; Wozniakowski, Aneta; Gauduin, Marie Claire; Paiardini, Mirko; McClure, Harold M.; Johnson, R. Paul; Silvestri, Guido; Sodora, Donald L.

In: Blood, Vol. 103, No. 3, 01.02.2004, p. 973-979.

Research output: Contribution to journalArticle

Muthukumar, A, Wozniakowski, A, Gauduin, MC, Paiardini, M, McClure, HM, Johnson, RP, Silvestri, G & Sodora, DL 2004, 'Elevated interleukin-7 levels not sufficient to maintain T-cell homeostasis during simian immunodeficiency virus-induced disease progression', Blood, vol. 103, no. 3, pp. 973-979. https://doi.org/10.1182/blood-2003-03-0874
Muthukumar, Alagarraju ; Wozniakowski, Aneta ; Gauduin, Marie Claire ; Paiardini, Mirko ; McClure, Harold M. ; Johnson, R. Paul ; Silvestri, Guido ; Sodora, Donald L. / Elevated interleukin-7 levels not sufficient to maintain T-cell homeostasis during simian immunodeficiency virus-induced disease progression. In: Blood. 2004 ; Vol. 103, No. 3. pp. 973-979.
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