Phase II/III Study Evaluating the Effect of IL-2 on Preservation of the CD4 T-Lymphocytes After Interruption of Antiretroviral Treatment in HIV-Infected Patients With CD4 T-Lymphocyte Count Greater Than 500 Cells/mm3 Who Received Antiretroviral Tx
NCT ID: NCT00071890
Last Updated: 2010-10-05
Study Results
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View full resultsBasic Information
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COMPLETED
PHASE2
148 participants
INTERVENTIONAL
2003-10-31
2007-12-31
Brief Summary
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The use of ARV medications has greatly improved the condition and mortality of HIV-infected patients. But when used long term, those medications have been associated with great toxicities and medication fatigue. As a result, patients may not adhere to ARV use, and resistance to viruses may grow. The CD4 molecule is on the surface of helper T-lymphocytes, or T-helper cells. It serves as the primary receptor for HIV-1 and HIV-2, allowing the virus to gain entry into its host. The CD4 count increases immediately in response to ARV, giving an estimate of the state of a patient's immune system. Thus, it is a strong marker of the immediate risk of an opportunistic infection, one that takes advantage of a person's weakened immune system. IL-2 is a molecule naturally produced by activated T cells. In patients with HIV, IL-2 treatment can increase CD4 counts but the clinical importance of this increase is not clear. This study will compare the decline in CD4 count, when ARV is interrupted, in two random groups of participants: (1) those who will receive three cycles of IL-2 (one every 8 weeks) in combination with ARV therapy for the first 24 weeks of the study before stopping ARV and (2) those who will receive ARV therapy without IL-2 for 24 weeks before stopping ARV.
Patients 18 years of age or older who have HIV-1 infection and who have been on ARV therapy for at least 1 year, and who currently have a CD4 count 500 cells per microliter or higher and never had a CD4 count of less than 200 cells per microliter and a viral load less than the limit of detection, may be eligible for this study.
Participants will undergo the following procedures and tests:
* Physical examination.
* Blood tests to measure blood lipids (fats), sugar, complete blood count including platelets, and chemistries.
* Assessment of fat distribution.
* Questionnaire about quality of life.
In addition, those participants who are randomly placed in the group receiving IL-2 and ARV will get an echocardiogram at the beginning of the study and at week 24. They will receive a starting dose of 6 million units of IL-2 as an injection under the skin twice a day. Each of the three IL-2 cycles will last 5 days. After the 24-week period, participants in both groups will stop taking ARV medications if their CD4 count is still equal to or greater than 500 cells per microliter. The study will continue into 120 weeks. Participants will be asked to continue to visit the clinic every 8 weeks for evaluation of their viral load and CD4 counts. Every 24 weeks, they will be asked to answer a questionnaire about their quality of life. Blood tests and other measurements will also be done as follow-up.
Detailed Description
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Studies to date suggest that baseline and nadir CD4 count are the best predictors of a longer duration of treatment interruption that may be more beneficial with respect to reversal or delay of long-term ARV-associated toxicity and improved quality of life. It is known that intermittent cycles of IL-2 administration can lead to expansion of the CD4 pool and prolong survival of CD4 T cells. In this study the hypothesis tested is that IL-2 given prior to ARV treatment interruption could significantly prolong the period of ARV treatment interruption with preservation of CD4 counts above 350 cells/micro liter, and that this prolongation will be beneficial with respect to antiretroviral related toxicity and quality of life.
The study will have two parts: during the first part (24 weeks) patients will be randomized 1:1 to either receive three cycles or IL-2 with their ARV therapy or ARV therapy alone. In the second part (week 24 to week 120), all participants will interrupt therapy and restart when CD4 is less than 350 cells/micro liter. The main comparison will be at week 72, when the proportion of patients from the two groups who remain off drugs and have a CD4 greater than 350 cells/micro liter will be compared. At regular intervals (every 24 weeks) lipodystrophy measurements and quality of life questionnaires will be evaluated.
Conditions
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Study Design
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RANDOMIZED
PARALLEL
TREATMENT
NONE
Study Groups
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Interleukin 2 group
HAART (standard of care) and three cycles of IL-2
Interleukin 2
Three cycles of IL-2 (6 MUI bid during 5 days = one cycle)
HAART
HAART from week 0 to week 24
Treatment interruption
HAART is interrupted from week 24 in both arms
Control group
HAART alone
HAART
HAART from week 0 to week 24
Treatment interruption
HAART is interrupted from week 24 in both arms
Interventions
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Interleukin 2
Three cycles of IL-2 (6 MUI bid during 5 days = one cycle)
HAART
HAART from week 0 to week 24
Treatment interruption
HAART is interrupted from week 24 in both arms
Other Intervention Names
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Eligibility Criteria
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Inclusion Criteria
HIV-1 infection confirmed by ELISA and Western Blot before screening.
Category A or B HIV-1 infection.
Antiretroviral treatment:
* started at least 12 months prior to screening visit;
* stable and continuous for at least 12 weeks prior to screening visit;
* modified no more than once for virologic failure.
IL-2 naive
CD-4(+) T-lymphocyte count greater than or equal to 500 cells/mm(3) in the twelve weeks prior to screening (historical) and at screening.
Nadir CD4(+) T-lymphocyte count greater than or equal to 200 cells/mm(3) prior to screening visit (that is, no measurement whose values may be less than 200/mm(3) since diagnosis of the HIV infection.
Plasma HIV RNA less than 50 copies/ml in the 12 weeks preceding screening (historical, less than limit of detection if different method and/or cut off used) and at screening.
For women of child-bearing age: use of effective contraception (hormonal such as birth control pill or injections, intrauterine device, surgical sterilization and/or mechanical barrier methods such as diaphragm or condoms); for all participants agreement to fully comply with prevention of transmission recommendations during periods of viremia if sexually active (latex condoms with or without additional barrier methods).
Desire to interrupt antiretroviral therapy.
Ability to sign informed consent (no later than W-2).
Exclusion Criteria
Combined treatment with interferon, other interleukins, anti-HIV vaccines, systemic (not topical or inhaled) corticosteroids and hydroxyurea within the previous 12 weeks.
Diagnosis of AIDS.
Acute infection in the 14 days preceding inclusion.
Pregnant, lactating woman desiring conception or not using contraception.
Hemoglobin less than 10 g/dl; neutrophils less than 1,000/mm(3); platelets less than 50,000/mm(3); creatinine greater than 1.5 times the upper limit of normal (N); bilirubin greater than 3N; AST or ALT greater than 3 N.
Progressive disease of malignant, psychiatric, cardiac, pulmonary, thyroid, renal or neurological (peripheral or central) origin or severe disorders of hemostasis.
Severe uncontrolled hypertension.
Previous or progressive pathology contraindicating the administration of IL-2.
History of extensive psoriasis, Crohn's disease or auto-immune disease involving severe complications.
HTLV-1 infection (ELISA positive).
Hepatitis B virus co-infection treated with lamivudine or tenofovir or adefovir.
Since atazanavir use can be associated with higher bilirubin levels (mostly indirect) in the absence of clinical consequences, subjects on atazanavir with bilirubin up to 4.5 times N may be allowed to participate if the levels have been stable and after approval by the PI or the PI designated covering physician.
18 Years
ALL
No
Sponsors
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ANRS, Emerging Infectious Diseases
OTHER_GOV
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Responsible Party
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National Institutes of Health
Principal Investigators
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Yves Lévy, PHD
Role: STUDY_CHAIR
CHU Henri Mondor Créteil, FRANCE
Irini Sereti, MD
Role: STUDY_CHAIR
National Institute of Allergy and Infectious Diseases (NIAID)
Locations
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National Institutes of Health Clinical Center, 9000 Rockville Pike
Bethesda, Maryland, United States
Hospital Henri Mondor
Créteil, , France
Countries
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References
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Arno A, Ruiz L, Juan M, Jou A, Balague M, Zayat MK, Marfil S, Martinez-Picado J, Martinez MA, Romeu J, Pujol-Borrell R, Lane C, Clotet B. Efficacy of low-dose subcutaneous interleukin-2 to treat advanced human immunodeficiency virus type 1 in persons with </=250/microL CD4 T cells and undetectable plasma virus load. J Infect Dis. 1999 Jul;180(1):56-60. doi: 10.1086/314831.
Carr A, Emery S, Lloyd A, Hoy J, Garsia R, French M, Stewart G, Fyfe G, Cooper DA. Outpatient continuous intravenous interleukin-2 or subcutaneous, polyethylene glycol-modified interleukin-2 in human immunodeficiency virus-infected patients: a randomized, controlled, multicenter study. Australian IL-2 Study Group. J Infect Dis. 1998 Oct;178(4):992-9. doi: 10.1086/515653.
Carr A, Cooper DA. Adverse effects of antiretroviral therapy. Lancet. 2000 Oct 21;356(9239):1423-30. doi: 10.1016/S0140-6736(00)02854-3.
Alexandre M, Prague M, Lhomme E, Lelievre JD, Wittkop L, Richert L, Levy Y, Thiebaut R. Definition of Virological Endpoints Improving the Design of HIV Cure Strategies Using Analytical Antiretroviral Treatment Interruption. Clin Infect Dis. 2024 Dec 17;79(6):1447-1457. doi: 10.1093/cid/ciae235.
Other Identifiers
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04-I-0018
Identifier Type: OTHER
Identifier Source: secondary_id
ANRS 118 ILIADE
Identifier Type: OTHER
Identifier Source: secondary_id
040018
Identifier Type: -
Identifier Source: org_study_id