Long-Term Nonprogressive Infection with Human Immunodeficiency Virus Type 1 in a Hemophilia Cohort
The Journal of Infectious Diseases
Seven long-term nonprogressors (LTNPs) have been identified in a cohort of 128 human immunodeficiency virus (HIV)-1 infected individuals with hemophilia. Studies included quantitation of virus by polymerase chain reaction, characterization of primary virus isolates in vitro, analysis of lymphocyte surface markers, and measurement of virus-specific cytotoxic T lymphocytes (CTLs). Viruses of LTNPs exhibited slow growth in vivo and in vitro. LTNPs had expansion of CDS T cells with increased expression of HLA-DR. Intermittent HIV- 1-specific CTL effector activity was detected in freshly isolated peripheral blood mononuclear cells of most LTNPs. CTL precursor frequencies were higher in LTNPs than in patients with progressive disease. Virus antigen-specific lymphoproliferation was vigorous in some LTNPs. Thus, LTNPs in this cohort have maintained remarkably low virus burdens and vigorous HIV-1-specific cell-mediated immunity over a 15-year period. The presence of expanded, activated CDS T cells with cytotoxic effector function in the peripheral blood suggests ongoing viral replication.
Greenough, Thomas C.; Doreen B. Brettler; Frank Kirchhoff; Louis Alexander; Stephen J. O'Brien; Mohan Somasundaran; Katherine Luzuriaga; and John L. Sullivan. 1999. "Long-Term Nonprogressive Infection with Human Immunodeficiency Virus Type 1 in a Hemophilia Cohort." The Journal of Infectious Diseases 180, (6): 1790-1802. http://nsuworks.nova.edu/cnso_bio_facarticles/650