A Randomized, Open-Label, Study of the Impact of Two Doses of Subcutaneous Recombinant IL-2 (Proleukin) on Viral Burden and CD4+ Cell Count in Patients With HIV-1 Infection and CD4+ Cell Counts Greater Than or Equal to 300/mm3

There is substantial evidence that rIL-2 increases CD4+ cell count. Whether or not rIL-2 delays progression to AIDS and extends survival is currently unknown, such clinical benefits of rIL-2 can only be established in a large, long-term, randomized trial. This study examines the effect of two different rIL-2 doses on HIV viral burden and CD4+ cell count and provides additional information on optimal dosing, safety, and antiviral activity of rIL-2. Patients are randomized to receive one of two subcutaneous (sc) doses of recombinant rIL-2 or no rIL-2. Those patients who take rIL-2 initially receive three courses of treatment. For this study, a course is defined as eight calendar weeks, including the five-day period of sc rIL-2 administration. Additional courses are given (no more frequently than every 6 weeks) in order to maintain a CD4+ count of at least twice its baseline level or at least 1,000 cells/mm3. Follow-up will continue for all patients until a common closing date of 12 months following enrollment of the last patient.