The relationship of CCR5 antagonists to CD4+ T-cell gain: a meta-regression of recent clinical trials in treatment-experienced HIV-infected patients. Academic Article uri icon



  • PURPOSE: Lower CD4+ T-cell counts are related to increased morbidity and mortality despite virologic suppression. CCR5 antagonists are associated with robust CD4+ T-cell responses. We examined the relationship of CCR5 antagonists to CD4+ T-cell gains. DESIGN: Meta-regression of recent phase 2-3 trials evaluating new antiretroviral agents in treatment-experienced subjects. METHODS: We analyzed the relationship of CCR5 antagonists to CD4+ T-cell count increase 24 weeks after initiating the new regimen using a linear model with generalized estimating equations controlling for differing rates of virologic suppression. Each treatment group was treated as a data point weighted by sample size. RESULTS: We included 46 treatment groups from 17 trials (11 groups from 5 trials used CCR5 antagonists). Controlling for average baseline HIV-1 RNA and proportion of subjects achieving HIV-1 RNA <50 copies/mL, use of a CCR5 antagonist was associated with an additional significant CD4+ T-cell gain of +30/μL (95% CI, 19-42) at 24 weeks compared to treatment groups not using a CCR5 antagonist. CONCLUSIONS: Use of a CCR5 antagonist was associated with an enhanced CD4+ T-cell count response independent of virologic suppression. This observation supports further evaluation of CCR5 antagonists in patients with discordant immunologic and virologic responses to ART.

publication date

  • November 1, 2010



  • Anti-Retroviral Agents
  • CCR5 Receptor Antagonists
  • CD4-Positive T-Lymphocytes
  • HIV Infections
  • HIV-1


PubMed Central ID

  • PMC3086540

Scopus Document Identifier

  • 78751561529

Digital Object Identifier (DOI)

  • 10.1310/hct1106-351

PubMed ID

  • 21239363

Additional Document Info


  • 11


  • 6