Long-term immune recovery under continuous antiretroviral therapy (ART) among ART-naive people living with HIV in two cohorts in Germany
摘要
Immune recovery among people living with HIV (PWHIV) receiving antiretroviral therapy (ART) is determined analysing CD4 cell counts and the CD4/CD8 ratio. Recovery to ≥ 800 CD4 cells/µl and CD4/CD8 ratio ≥ 1 was associated with favourable outcomes. We investigated immune recovery over 10 years among ART-naive PWHIV on ART.
MethodsData were obtained from two German HIV cohorts, the HIV-1 Seroconverter study and the ClinSurv-HIV study, between 2003 and 2018. We included ART-naïve PWHIV starting with continuous ART and analysed CD4 cell counts and the CD4/CD8 ratio. The time to reaching immune thresholds was investigated using Kaplan–Meier analyses with inverse probability censoring weights.
ResultsOverall, 8,927 participants were included. At baseline, PWHIV had a median CD4 cell count of 257 (interquartile range [IQR] 124–393) cells/µl and CD4/CD8 ratio of 0.26 (IQR 0.14–0.43). After ten years, median CD4 counts increased to 630 (IQR 474–811) cells/µl and CD4/CD8 ratio to 0.84 (IQR 0.61–1.11). PWHIV with higher baseline CD4 values and without viral failure had higher median CD4 counts and CD4/CD8 ratios. The cumulative probability of achieving a CD4 count ≥ 800 cells/µl and/or CD4/CD8 ratio ≥ 1 over 10 years of ART were 54% for the CD4 threshold, 53% for the CD4/CD8 ratio threshold, and 32% for both thresholds. CD4 at baseline was identified as a predictor to achieve immune recovery in all models.
ConclusionsEarly diagnosis and treatment, as well as effective antiviral therapy without viral failure, should be considered to achieve long-term immune recovery among PWHIV.