TY - JOUR
T1 - Early antiretroviral treatment prevents the development of central nervous system abnormalities in simian immunodeficiency virus-infected rhesus monkeys
AU - Marcondes, Maria Cecilia G.
AU - Flynn, Claudia
AU - Huitron-Rezendiz, Salvador
AU - Watry, Debbie D.
AU - Zandonatti, Michelle
AU - Fox, Howard S.
PY - 2009/6/19
Y1 - 2009/6/19
N2 - 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.
AB - 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.
KW - Antiretroviral
KW - Brain
KW - Neuroaids
KW - Simian immunodeficiency virus
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U2 - 10.1097/QAD.0b013e32832c4af0
DO - 10.1097/QAD.0b013e32832c4af0
M3 - Article
C2 - 19455015
AN - SCOPUS:67651111906
SN - 0269-9370
VL - 23
SP - 1187
EP - 1195
JO - AIDS
JF - AIDS
IS - 10
ER -