Early antiretroviral treatment prevents the development of central nervous system abnormalities in simian immunodeficiency virus-infected rhesus monkeys

Maria Cecilia G. Marcondes, Claudia Flynn, Salvador Huitron-Rezendiz, Debbie D. Watry, Michelle Zandonatti, Howard S. Fox

Research output: Contribution to journalArticle

21 Scopus citations

Abstract

Objective: Neurocognitive disorders are devastating consequences of HIV infection. Although antiretroviral regimens have been efficacious in both improving life expectancy and decreasing dementia, there has not been an effect on the overall prevalence of HIV-associated neurocognitive disorders. Whether early institution of treatment, or treatment with drugs that effectively penetrate the blood-brain barrier, would help protect from such conditions is not known. Using the simian immunodeficiency virus/ macaque model, we investigated the hypothesis that early introduction of antiretroviral treatment can protect the brain.Design and methods: Animals were inoculated with simian immunodeficiency virus, and upon resolution of the acute infection period divided into two groups and treated, or not, with combination antiretroviral therapy. Viral, immune, and physiological parameters were measured during the course of infection, followed by assessment of viral, immune, and molecular parameters in the brain.Results: We observed that even with agents that show poor penetration into the central nervous system, early antiretroviral treatment prevented characteristic neurophysiolo- gical and locomotor alterations arising after infection and resulted in a significant decrease in brain viral load. Although the number of infiltrating immune cells in the brain did not change with treatment, their phenotype did, favoring an enrichment of effector T cells. Early treatment also significantly lowered brain levels of interferon-α,a cytokine that can lead to neurocognitive and behavioral alterations.Conclusion: Early antiretroviral treatment prevents central nervous system dysfunction by decreasing brain viral load and interferon-aα levels, which can have a profound impact over the course of infection.

Original languageEnglish (US)
Pages (from-to)1187-1195
Number of pages9
JournalAIDS
Volume23
Issue number10
DOIs
StatePublished - Jun 19 2009

Keywords

  • Antiretroviral
  • Brain
  • Neuroaids
  • Simian immunodeficiency virus

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology
  • Infectious Diseases

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