HIV controllers with different viral load cutoff levels have distinct virologic and immunologic profiles

Fernanda H. Côrtes, Caroline P.B. Passaes, Gonzalo Bello, Sylvia L.M. Teixeira, Carla Vorsatz, Dunja Babic, Mark Sharkey, Beatriz Grinsztejn, Valdilea Veloso, Mario Stevenson, Mariza G. Morgado

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

Background: The mechanisms behind natural control of HIV replication are still unclear, and several studies pointed that elite controllers (ECs) are a heterogeneous group. Methods: We performed analyses of virologic, genetic, and immunologic parameters of HIV-1 controllers groups: (1) ECs (viral load, ,80 copies/mL); (2) ebbing elite controllers (EECs; transient viremia/blips); and viremic controllers (VCs; detectable viremia, ,5000 copies/mL). Untreated noncontrollers (NCs), patients under suppressive highly active antiretroviral therapy (HAART), and HIV- 1-negative individuals were analyzed as controls. Results: Total and integrated HIV-1 DNA for EC were significantly lower than for NC and HAART groups. 2-LTR circles were detected in EEC (3/5) and VC (6/7) but not in EC. Although EC and EEC maintain normal T-cell counts over time, some VC displayed negative CD4+ T-cell slopes. VC and EEC showed a higher percentage of activated CD8+ T cells and microbial translocation than HIV-1-negative controls. EC displayed a weaker Gag/Nef IFN-g T-cell response and a significantly lower proportion of anti- HIV IgG antibodies than EEC, VC, and NC groups. Conclusion: Transient/persistent low-level viremia in HIV controllers may have an impact on immunologic and virologic profiles. Classified HIV controller patients taking into account their virologic profile may decrease the heterogeneity of HIV controllers cohorts, which may help to clarify the mechanisms associated to the elite control of HIV.

Original languageEnglish (US)
Pages (from-to)377-385
Number of pages9
JournalJournal of Acquired Immune Deficiency Syndromes
Volume68
Issue number4
DOIs
StatePublished - Apr 1 2015

Keywords

  • HIV-1
  • elite controllers
  • immune activation and microbial translocation
  • immune response
  • ongoing replication
  • viral load blips

ASJC Scopus subject areas

  • Infectious Diseases
  • Pharmacology (medical)

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