Effect of opportunistic infections on the frequency of leukocyte subpopulations from type-1 human immunodeficiency virus infected individuals

Carlos Julio Montoya, Zoraída Ramirez, Juan Carlos Cataño, Alejandro Román, María Teresa Rugeles, .

Keywords: AIDS-related opportunistic infections/ immunology, leukocytes, HIV-1, lymphocyte activation, dendritic cells, natural killer cells, natural

Abstract

Introduction. The presence of opportunistic infections in patients with acquired immunodeficiency syndrome favors the progression of HIV-1 infection. Despite the key role that several leukocyte subpopulations exhibit during the anti-infectious response, few studies have focused on the role of these cells in HIV-1-infected patients with active opportunistic infections.
Objective. The quantity of several innate and adaptive cell subpopulations was evaluated in whole peripheral blood of HIV-1-infected patients, with and without a history of opportunistic infections.
Materials and methods. The absolute number of each leukocyte subpopulation was evaluated by flow cytometry, and for each cell subpopulation, this number was correlated with viral load, CD4+ T cell count and the expression of activation markers on CD4+ and CD8+ T lymphocytes.
Results. Chronically HIV-1 infected patients exhibited a quantitative deficiency in several leukocyte subpopulations; this effect was more pronounced in individuals suffering an active opportunistic infection. This indicated that the coinfection by HIV-1 and opportunistic microorganisms potentiated the immunodeficiency by reducing significantly the frequency of different subpopulations of leukocytes.
Conclusions. This finding underlines the importance of an early diagnose of HIV-1 infection, and the need for the rational use of antiretroviral medications to avoid the development of opportunistic infections. In addition, it points to the necessity of developing immunotherapy strategies for HIV-1-infected patients in order to re-establish the immune competence.

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  • Carlos Julio Montoya Grupo de Inmunovirología, Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia
  • Zoraída Ramirez Grupo de Inmunovirología, Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia
  • Juan Carlos Cataño Sección de Enfermedades Infecciosas, Departamento de Medicina Interna, Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia
  • Alejandro Román Grupo de Inmunovirología, Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia
  • María Teresa Rugeles Grupo de Inmunovirología, Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia

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How to Cite
1.
Montoya CJ, Ramirez Z, Cataño JC, Román A, Rugeles MT. Effect of opportunistic infections on the frequency of leukocyte subpopulations from type-1 human immunodeficiency virus infected individuals. biomedica [Internet]. 2008 Mar. 1 [cited 2024 May 17];28(1):64-77. Available from: https://revistabiomedica.org/index.php/biomedica/article/view/109
Published
2008-03-01
Section
Original articles

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