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Open Access 01-12-2014 | Research article

Sex differences in responses to antiretroviral treatment in South African HIV-infected children on ritonavir-boosted lopinavir- and nevirapine-based treatment

Authors: Stephanie Shiau, Louise Kuhn, Renate Strehlau, Leigh Martens, Helen McIlleron, Sandra Meredith, Lubbe Wiesner, Ashraf Coovadia, Elaine J Abrams, Stephen M Arpadi

Published in: BMC Pediatrics | Issue 1/2014

Abstract

Background

While studies of HIV-infected adults on antiretroviral treatment (ART) report no sex differences in immune recovery and virologic response but more ART-associated complications in women, sex differences in disease progression and response to ART among children have not been well assessed. The objective of this study was to evaluate for sex differences in response to ART in South African HIV-infected children who were randomized to continue ritonavir-boosted lopinavir (LPV/r)-based ART or switch to nevirapine-based ART.

Methods

ART outcomes in HIV-infected boys and girls in Johannesburg, South Africa from 2005–2010 were compared. Children initiated ritonavir-boosted lopinavir (LPV/r)-based ART before 24 months of age and were randomized to remain on LPV/r or switch to nevirapine-based ART after achieving viral suppression. Children were followed for 76 weeks post-randomization and then long-term follow up continued for a minimum of 99 weeks and maximum of 245 weeks after randomization. Viral load, CD4 count, lipids, anthropometrics, drug concentrations, and adherence were measured at regular intervals. Outcomes were compared between sexes within treatment strata.

Results

A total of 323 children (median age 8.8 months, IQR 5.1-13.5), including 168 boys and 155 girls, initiated LPV/r-based ART and 195 children were randomized. No sex differences in risk of virological failure (confirmed viral load >1000 copies/mL) by 156 weeks post-randomization were observed within either treatment group. Girls switched to nevirapine had more robust CD4 count improvement relative to boys in this group through 112 weeks post-randomization. In addition, girls remaining on LPV/r had higher plasma concentrations of ritonavir than boys during post-randomization visits. After a mean of 3.4 years post-randomization, girls remaining on LPV/r also had a higher total cholesterol:HDL ratio and lower mean HDL than boys on LPV/r.

Conclusions

Sex differences are noted in treated HIV-infected children even at a young age, and appear to depend on treatment regimen. Future studies are warranted to determine biological mechanisms and clinical significance of these differences.

Trial registration

ClinicalTrials.gov Identifier: NCT00117728

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The pre-publication history for this paper can be accessed here:http://www.biomedcentral.com/1471-2431/14/39/prepub

Title: Sex differences in responses to antiretroviral treatment in South African HIV-infected children on ritonavir-boosted lopinavir- and nevirapine-based treatment
Authors: Stephanie Shiau
Louise Kuhn
Renate Strehlau
Leigh Martens
Helen McIlleron
Sandra Meredith
Lubbe Wiesner
Ashraf Coovadia
Elaine J Abrams
Stephen M Arpadi
Publication date: 01-12-2014
Publisher: BioMed Central
Published in: BMC Pediatrics / Issue 1/2014
Electronic ISSN: 1471-2431
DOI: https://doi.org/10.1186/1471-2431-14-39

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Sex differences in responses to antiretroviral treatment in South African HIV-infected children on ritonavir-boosted lopinavir- and nevirapine-based treatment

Abstract

Background

Methods

Results

Conclusions

Trial registration

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Background

Methods

Results

Conclusions

Trial registration

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