Review Article

The Role of Sexually Transmitted Infections in HIV-1 Progression: A Comprehensive Review of the Literature

Table 1

Studies evaluating the impact of HSV-2 suppressive treatment on HIV-1 plasma RNA levels and progression.

First author and referencePublication yearSample sizeStudyLocationInterventionGenital HIV-1 RNA change (log10 copy/mL)Plasma HIV-1 RNA change (log10 copy/mL)Clinical outcomes

Studies examining the impact on plasma and/or genital viral load coinfected patients off CART
Schacker [14]200212 (no CART); 1 patient on dual therapySingle-arm studyUSAAcyclovir 800 mg three times daily for 8 weeks; no treatment during the preceding and subsequent 8-week periodsNR48% reduction in RNA levelsNR

Nagot [8]2007136 women
(no CART)
Randomized studyBurkina FasoValacyclovir 500 mg twice daily versus placebo for 12 weeksCervical: −0.53 (95% CI: −0.72, −0.35)−0.29 (95% CI: −0.44, −0.15)NR

Zuckerman [15]200720 MSM
(no CART)
Placebo-controlled crossoverLima, PeruValacyclovir 500 mg twice daily versus placebo (8 weeks for each arm)Rectal levels: −0.16 (95% CI: −0.07, −0.25; ), 33% decrease −0.33 (95% CI: −0.23, −0.42; ), 53% decreaseNR

Dunne [16]200867 women
(no CART)
Placebo-controlled crossoverChiang Rai, ThailandAcyclovir 800 mg twice daily versus placebo (1 month each phase)Cervicovaginal levels: −0.3, −0.47, NR

Baeten [17]200820 women
(no CART)
Placebo-controlled crossoverPeruValacyclovir 500 mg twice daily versus placebo (8-week treatment)Cervical levels: −0.35, a 55% decrease, and −0.26, a 45% decrease [ ]NR

Delany [18]2009300 women
(no CART)
Randomized studySouth AfricaAcyclovir 400 mg twice daily versus placebo (3 months)Cervicovaginal levels: 0.13 (95% CI: −0.14, 0.39)−0.34 (95% CI: −0.15, −0.54)NR

Celum* [19]20103,360 heterosexual men and women (no CART)Randomized studySouth and East AfricaAcyclovir 400 mg twice daily for up to 102 weeksNR−0.25 (95% CI: −0.29, −0.22), NR

Tanton [20]2010484 women
(no CART)
Randomized studyTanzaniaAcyclovir 400 mg twice daily versus placebo for 6 monthsCervicovaginal levels: −0.01 (95% CI: −0.20, 0.19)0.04 (95% CI: −0.07, 0.15)NR

Mugwanya [21]201132 men and women
(no CART)
Placebo-controlled crossoverKenyaValacyclovir 1.5 g twice daily versus acyclovir 400 twice daily (12 weeks)NR−0.62 (95% CI: −0.68, −0.55, )NR

Studies examining the impact on plasma and/or genital viral load coinfected patients on CART
Ouedraogo [22]200660 women (on CART)Randomized studyBurkina FasoValacyclovir 500 mg twice daily versus placebo for 12 weeksCervicovaginal levels: −0.41 (95% CI: −1.35, 0.53)−0.33 (95% CI: −0.81, 0.16)NR

Studies examining the impact on clinical HIV-1 progression
Lingappa* [23]20103,381 heterosexual men and women (no CART)Randomized studyEast and Southern AfricaAcyclovir 400 mg twice daily versus placebo for 24 monthsNR * 16% reduction in HIV-1 progression (HR 0.84, 95% CI: 0.71, 0.98)

Reynolds [24]2012440 (no CART)Randomized studyUgandaAcyclovir 400 mg twice daily versus placebo for 24 monthsNRNR25% reduction in progression (HR: 0.75, 95% CI: 0.59, 0.99)

Utilized same study population.
CART: combination antiretroviral therapy; CI: confidence interval; HR: hazard ratio; NR: not reported.