Clinical trial NCT01854762: Antiretroviral Regimens Containing Raltegravir for Prophylaxis of Mother-to-child-transmission of HIV Infection
Official title: Evaluation of the Use of Antiretroviral Regimens Containing Raltegravir for Prophylaxis of Mother-to-child-transmission of HIV Infection in Pregnant Women Presenting With Detectable Viral Load After 32 Weeks of Gestation: a Pilot Study
Study type: INTERVENTIONAL
Overall status: TERMINATED
Phase: PHASE2
PHASE3
Conditions: HIV
Pregnancy
Keywords: HIV
Treatment
Pregnancy
Lead sponsor: Fundação Bahiana de Infectologia
Sponsor class: OTHER
First posted: 2013-05-16
Enrollment: 33
Sex: FEMALE
Minimum age (years): 18
Maximum age (years): 50
Standard ages: ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: PARALLEL
Intervention model description: Pilot randomized single-center open label clinical trial
Primary purpose: TREATMENT

Brief summary: The current available antiretroviral (ARV) agents make possible a successful treatment of virtually all HIV-infected patients, even those heavily experienced subjects, with a history of previous failure to ARV drugs of different classes. However, some problems are still present, especially for specific populations, like pregnant women and infants. For these groups, most of currently available drugs are not used, because the lack of information on safety, efficacy, and pharmacokinetic/dynamic behavior of ARVs drugs. The mother to child transmission (MTCT) is still a problem in certain areas of the world, especially in resource-limited settings. In some settings, women often present to their first antenatal care visit late in the pregnancy, posing an additional problem: how to effectively treat these patients to assure they will have an undetectable viral load at the moment of delivering? Depending on the plasma viremia magnitude, and viral susceptibility it can take 6 or more weeks to reduce the viral load to less than the desired 1,000 copies of HIV-1 RNA / ml of plasma. To achieve this goal, it would be necessary the use of a potent, very efficacious ARV regimen that could provide such viral decay in a very short period. Raltegravir (RAL), the first HIV-1 integrase inhibitor, is a potent and safe ARV drug. The available evidence suggest it has no genotoxic potential, and promotes a rapid decline in HIV-1 plasma viremia. In addition, RAL is highly active against viral strains presenting different degree of resistance to other ARV drugs. Thus, RAL could be an ideal candidate to be used for prevention of MTCT for women with detectable viral load, presenting late in the course of pregnancy. Another attractive point is to consider that, due to the similarity between the integrase enzyme of HIV-1 and Human T-cell lymphotropic virus type-1 (HTLV-1); RAL could be active against HTLV-1, blocking its replication. If our hypothesis is correct, the use f RAL-containing ARV regimens would reduce the MTCT of both agents. This study has the objective of evaluating the efficacy of RAL containing ARV regimens in reducing the HIV-1 RNA plasma viral load below 50 copies/ml, at the end of pregnancy, for late-presenters pregnant women and to compare the frequency of adverse events for women using RAL-based ARV regimens and comparators, and for their babies.

Detailed description: A total of 44 late-presenters (gestational age \>28 weeks), HIV-infected pregnant women will be randomly assigned to receive an antiretroviral regimen based on Zidovudine (AZT)+Lamivudine (3TC)+Raltegravir or AZT+3TC+Lopinavir/r (LPV/r). They will be followed up to the delivery, and plasma viral load will be measured. The rate of HIV mother-to-child-transmission will be compared between groups. The newborns will be followed up to 6 months, to register any adverse event during this period of time.

Eligibility criteria: Inclusion Criteria:

* Pregnant women with confirmed HIV-1 infection (positive Western blot or plasma HIV-1 RNA \>1,000 copies/ml)
* Gestational age higher than 28 weeks
* Age equal or higher than 15 years
* HIV-1 plasma viral load ≥ 1,000 copies of HIV-1 RNA/ml

Exclusion Criteria:

* Age lower than 15 years
* Undetectable plasma viral load at screening
* Previous use of RAL

Primary outcomes:
measure: HIV Viral Load at Delivery
timeFrame: 2, 4, 6 weeks and at delivery
Secondary outcomes:
measure: Overall Adverse Events up to Delivery
timeFrame: 2, 4, 6 weeks and at delivery
measure: Number of Children Infected With HIV
timeFrame: 4 weeks after delivery
Other outcomes:
Locations:
city: Salvador
country: Brazil
facility: Fundação Bahiana de Infectologia/SEI
state: Bahia
Study officials:
affiliation: Fundação Bahiana de Infectologia
name: Carlos Brites, MD, PhD
role: PRINCIPAL_INVESTIGATOR
References: