Decreased levels of circulating IL-21 in HIV-infected AIDS patients: Correlation with CD4+ T-cell counts

Alexandre Iannello, Cecile Tremblay, Jean Pierre Routy, Mohamed Rachid Boulassel, Emil Toma, Ali Ahmad

Research output: Contribution to journalArticle

59 Citations (Scopus)


IL-21 is a relatively newly discovered multifunctional and pleiotropic cytokine. It is produced primarily by CD4+ T cells, the principal targets of the virus, and therefore this cytokine has special relevance to HIV infection. Here we show for the first time that serum levels of this cytokine are significantly reduced in HIV-infected AIDS patients and correlate significantly with their CD4+ T-cell counts. These data suggest that the cytokine levels could act as a valuable biomarker for the progression of AIDS.

Original languageEnglish
Pages (from-to)385-388
Number of pages4
JournalViral Immunology
Issue number3
Publication statusPublished - Sep 1 2008


ASJC Scopus subject areas

  • Immunology
  • Molecular Medicine
  • Virology

Cite this