Mean CD4 cell count changes in patients failing a first-line antiretroviral therapy in resource-limited settings

Alexandra Calmy, Eric Balestre, Fabrice Bonnet, Andrew Boulle, Eduardo Sprinz, Robin Wood, Eric Delaporte, Eugène Messou, James McIntyre, Kamal M. El Filali, Mauro Schechter, N. Kumarasamy, David Bangsberg, Patrick McPhail, Stefaan Van Der Borght, Carlos Zala, Matthias Egger, Rodolphe Thiébaut, François Dabis

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Background: Changes in CD4 cell counts are poorly documented in individuals with low or moderate-level viremia while on antiretroviral treatment (ART) in resource-limited settings. We assessed the impact of on-going HIV-RNA replication on CD4 cell count slopes in patients treated with a first-line combination ART.Method: Naïve patients on a first-line ART regimen with at least two measures of HIV-RNA available after ART initiation were included in the study. The relationships between mean CD4 cell count change and HIV-RNA at 6 and 12 months after ART initiation (M6 and M12) were assessed by linear mixed models adjusted for gender, age, clinical stage and year of starting ART.Results: 3,338 patients were included (14 cohorts, 64% female) and the group had the following characteristics: a median follow-up time of 1.6 years, a median age of 34 years, and a median CD4 cell count at ART initiation of 107 cells/μL. All patients with suppressed HIV-RNA at M12 had a continuous increase in CD4 cell count up to 18 months after treatment initiation. By contrast, any degree of HIV-RNA replication both at M6 and M12 was associated with a flat or a decreasing CD4 cell count slope. Multivariable analysis using HIV-RNA thresholds of 10,000 and 5,000 copies confirmed the significant effect of HIV-RNA on CD4 cell counts both at M6 and M12.Conclusion: In routinely monitored patients on an NNRTI-based first-line ART, on-going low-level HIV-RNA replication was associated with a poor immune outcome in patients who had detectable levels of the virus after one year of ART.

Original languageEnglish (US)
Article number147
JournalBMC Infectious Diseases
Volume12
DOIs
StatePublished - Jun 28 2012

Keywords

  • CD4 count
  • CD4 slope
  • HIV-1
  • HIV-RNA threshold
  • Resource limited settings

ASJC Scopus subject areas

  • Infectious Diseases

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    Calmy, A., Balestre, E., Bonnet, F., Boulle, A., Sprinz, E., Wood, R., Delaporte, E., Messou, E., McIntyre, J., El Filali, K. M., Schechter, M., Kumarasamy, N., Bangsberg, D., McPhail, P., Van Der Borght, S., Zala, C., Egger, M., Thiébaut, R., & Dabis, F. (2012). Mean CD4 cell count changes in patients failing a first-line antiretroviral therapy in resource-limited settings. BMC Infectious Diseases, 12, [147]. https://doi.org/10.1186/1471-2334-12-147