Prevention of HIV-1 infection with early antiretroviral therapy.
Cohen MS,
Chen YQ,
McCauley M,
Gamble T,
Hosseinipour MC,
Kumarasamy N,
Hakim JG,
Kumwenda J,
Grinsztejn B,
Pilotto JH,
Godbole SV,
Mehendale S,
Chariyalertsak S,
Santos BR,
Mayer KH,
Hoffman IF,
Eshleman SH,
Piwowar-Manning E,
Wang L,
Makhema J,
Mills LA,
de Bruyn G,
Sanne I,
Eron J,
Gallant J,
Havlir D,
Swindells S,
Ribaudo H,
Elharrar V,
Burns D,
Taha TE,
Nielsen-Saines K,
Celentano D,
Essex M,
Fleming TR;
HPTN 052 Study Team.
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Source
University of North Carolina at Chapel Hill, Institute for Global Health and Infectious Diseases, Suite 2115, Bioinformatics Bldg., 130 Mason Farm Rd., CB 7030, Chapel Hill, NC 27599, USA. mscohen@med.unc.edu
Abstract
BACKGROUND:
Antiretroviral therapy that reduces viral replication could limit the transmission of human immunodeficiency virus type 1 (HIV-1) in serodiscordant couples.
METHODS:
In nine countries, we enrolled 1763 couples in which one partner was HIV-1-positive and the other was HIV-1-negative; 54% of the subjects were from Africa, and 50% of infected partners were men. HIV-1-infected subjects with CD4 counts between 350 and 550 cells per cubic millimeter were randomly assigned in a 1:1 ratio to receive antiretroviral therapy either immediately (early therapy) or after a decline in the CD4 count or the onset of HIV-1-related symptoms (delayed therapy). The primary prevention end point was linked HIV-1 transmission in HIV-1-negative partners. The primary clinical end point was the earliest occurrence of pulmonary tuberculosis, severe bacterial infection, a World Health Organization stage 4 event, or death.
RESULTS:
As of February 21, 2011, a total of 39 HIV-1 transmissions were observed (incidence rate, 1.2 per 100 person-years; 95% confidence interval [CI], 0.9 to 1.7); of these, 28 were virologically linked to the infected partner (incidence rate, 0.9 per 100 person-years, 95% CI, 0.6 to 1.3). Of the 28 linked transmissions, only 1 occurred in the early-therapy group (hazard ratio, 0.04; 95% CI, 0.01 to 0.27; P<0.001). Subjects receiving early therapy had fewer treatment end points (hazard ratio, 0.59; 95% CI, 0.40 to 0.88; P=0.01).
CONCLUSIONS:
The early initiation of antiretroviral therapy reduced rates of sexual transmission of HIV-1 and clinical events, indicating both personal and public health benefits from such therapy. (Funded by the National Institute of Allergy and Infectious Diseases and others; HPTN 052 ClinicalTrials.gov number, NCT00074581.).
- PMID:
- 21767103
- [PubMed - indexed for MEDLINE]
- PMCID:
- PMC3200068
Free PMC ArticleFigure 1Enrollment and Outcomes
This trial profile describes recruitment of couples from the general population, randomization, HIV-1–uninfected partner's enrollment, seroconversion at baseline, retention, and loss-to-follow-up for assessment of the primary end point of linked HIV-1 transmission. Enrolled partners were followed on a quarterly-visit schedule, although attendance at semiannual visits is shown.
N Engl J Med. 2011 August 11;365(6):493-505.
Figure 2Kaplan–Meier Estimates for Partner-Linked and Any HIV-1 Transmission and for Clinical and Composite Monitoring Events
Shown are Kaplan–Meier estimates for the cumulative probabilities of linked HIV-1 transmission between partners (Panel A), any HIV transmission (Panel B), clinical events (Panel C), and composite monitoring events (Panel D) among participants in the early-therapy and delayed-therapy groups.
N Engl J Med. 2011 August 11;365(6):493-505.
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