Nine Month Course of Anti-HIV Medications for People Recently Infected With HIV

Combination antiretroviral therapy has resulted in significantly decreased morbidity and
mortality, incidence of opportunistic infections, and hospitalizations in HIV infected
people. However, because of long-term toxicities associated with long-term use of
antiretrovirals and the persistence of virus in latent reservoirs, it is unclear when it is
best to initiate therapy in recently infected individuals. This study compared the virologic
outcomes of adults recently infected with HIV who received emtricitabine/tenofovir disoproxil
fumarate (FTC/TDF), coformulated as Truvada, and lopinavir/ritonavir (LPV/RTV), coformulated
as Kaletra [immediate treatment (IT arm)], with those who received no treatment [deferred
treatment (DT arm)].

The original study lasted 96 weeks. Participants were randomly assigned to one of two groups
(IT arm vs. DT arm). For the first 36 weeks of the study, IT arm participants received
FTC/TDF once daily and LPV/RTV twice daily. Some IT arm participants received a different ART
regimen as determined by the participant and study staff, if appropriate. DT arm participants
received no treatment for the duration of the study. At Week 37, participants from both arms
were offered treatment continuation or initiation until Week 96 if they had a high viral
load, low CD4 count, or experienced HIV-related symptoms (Step 2). Study visits occurred at
screening, Weeks 1, 2, 4, 8, 12, 16, 20, 24, 28, 32, 36, 37, 38, 40, and every 4 weeks
thereafter. Clinical assessment and blood collection occurred at all visits. Urine tests
occurred at selected visits. Participants were asked to complete an adherence questionnaire
at Weeks 12, 24, and 36.

Per the recommendations the DSMB review in June 2009, this protocol was terminated as
originally written with the exception of those participants in the IT arm in the middle of
the first 36 weeks of treatment. Those participants were to continue on treatment until the
end of the 36 weeks. At that point treatment decisions were made on best practice guidelines.
In addition, the study duration was extended to include a 5 year follow up of participants
who did not initiate long-term antiretroviral therapy (Step 3).

The study was reviewed by an SMC on December 8, 2010. The SMC recommended the study close to
long term follow-up because only very few participants enrolled in this portion of the study.

All the results except for the CD4 analysis and time to treatment initiation and deaths were
based on the database frozen on July 2, 2009. The results for the CD4 analysis and time to
treatment initiation and deaths were based on the database frozen on January 30, 2012.

Inclusion Criteria for Step 1:

- Recently infected with HIV

- No prior antiretroviral therapy (ART)

- CD4 count of 350 cells/mm3 or more AND a CD4% of 14% or more within 21 days prior to
study entry

- HIV viral load of 500 copies/ml or more within 21 days prior to study entry

- Required laboratory values obtained within 21 days prior to study entry

- 18 years or older

- Ability and willingness to provide written informed consent

- Willing to use acceptable forms of contraception

Exclusion Criteria for Step 1:

- HIV progression to CDC category B or C disease

- Pregnancy or breastfeeding

- History of pancreatitis or coronary artery disease

- Prior ART. Participants who took antiretrovirals for postexposure prophylaxis more
than one year prior to study entry are not excluded.

- Certain medications within 21 days prior to study entry. Participants who agree to
receive an alternative ART regimen approved by the investigator will not be excluded.

- Previously received an investigational anti-HIV vaccine

- Current therapy with systemic corticosteroids. Patients who are taking a short course
(less than 21 days) of corticosteroids are not excluded.

- Current therapy with systemic chemotherapeutic agents; nephrotoxic systemic agents;
immunomodulatory treatments, including interleukin-2; or investigational agents

- Known allergy or sensitivity to study drugs or their formulations

- Current alcohol or drug use that, in the opinion of the investigator, would interfere
with the study

- Serious medical or psychiatric illness that, in the opinion of the investigator, would
interfere with the study

- Hepatitis B surface antigen positive within 21 days prior to study entry

- Known resistance to one or more components of the study drug regimen

Inclusion Criteria for Step 2:

- subjects in DT arm who meet one of the following five criteria will be advised to
enter step 2 and initiate ART:

1. CD4 cell counts below 350 cells/mm3 on 2 consecutive determinations at least 4
weeks apart at or after the step 1, week 12 study visit

2. HIV-1 RNA above 750,000 copies/mL confirmed on 2 consecutive determinations at
least 1 week apart at or after the step 1, week 4 study visit

3. HIV-1 RNA above 200,000 copies/mL on 2 consecutive determinations at least 1 week
apart at or after the step 1, week 12 study visit

4. Clinical progression to CDC category B or C disease

5. CD4 count below 200 cells/mm3 or CD4 percent less than 14% at any time on study

- subjects in IT arm who meet one of the following five criteria after discontinuing
study medications will be advised to enter step 2 and re-initiate ART:

1. CD4 cell counts below 350 cells/mm3 on 2 consecutive determinations at least 4
weeks apart at or after the step 1, week 12 post-treatment- discontinuation study
visit

2. HIV-1 RNA above 750,000 copies/mL confirmed on 2 consecutive determinations at
least 1 week apart at or after the step 1, week 4 post-treatment- discontinuation
study visit

3. HIV-1 RNA above 200,000 copies/mL on 2 consecutive determinations at least 1 week
apart at or after the step 1, week 12 post-treatment- discontinuation study visit

4. Clinical progression to CDC category B or C disease

5. CD4 count below 200 cells/mm3 or CD4 percent less than 14% at any time on study

Exclusion Criteria for Step 2:

- Pregnancy or breastfeeding

Inclusion Criteria for Step 3:

- Study participants who were on Step 1, IT arm and had completed or ended prematurely
the 36 week course of early ART and did not on ART either because they did not meet
eligibility criteria for Step 2 or because they did not start ART even after meeting
the Step 2 eligibility criteria.

- Study participants on Step 1, DT arm who were not on ART either because they did not
meet eligibility criteria for Step 2 or because they did not start ART even after
meeting the Step 2 eligibility criteria.

- Previous A5217 participants who had either completed the study or ended prematurely
their participation in the study, AND were not on ART either because they never met
eligibility criteria for Step 2 or because they had not started ART even after meeting
the Step 2 eligibility criteria.

- All A5217 participants who were on Step 1 and in the midst of their 36 weeks of
randomized ART and who completed a portion or all of the 36 weeks of originally
recommended therapy, AND chose then to interrupt their ART.

Exclusion Criteria for Step 3:

- Participants who were on Step 1, IT arm of the study receiving ART.

- Participants in Step 2 or who had otherwise initiated long-term ART, regardless of
whether they were on treatment.