CONTROLLED TRIAL OF INTERLEUKIN-2 INFUSIONS IN PATIENTS INFECTED WITH THE HUMAN IMMUNODEFICIENCY VIRUS
1996
Background Interleukin-2 is a cytokine that regulates the proliferation and differentiation of lymphocytes. In preliminary studies, intermittent infusions of interleukin-2 led to increases in CD4 counts in patients with human immunodeficiency virus (HIV) infection and more than 200 CD4 cells per cubic millimeter. We conducted a controlled study to evaluate the long-term effects of such therapy on both CD4 counts and the viral burden. Methods Sixty HIV-infected patients with base-line CD4 counts above 200 cells per cubic millimeter were randomly assigned to receive either interleukin-2 plus antiretroviral therapy (31 patients, 1 of whom was lost to follow-up) or antiretroviral therapy alone (29 patients). Interleukin-2 was administered every two months for six cycles of five days each, starting at a dosage of 18 million IU per day. Safety and immunologic and virologic measures were monitored monthly until four months after the last treatment cycle. Results In patients treated with interleukin-2, the mean (...
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