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Evidence for ongoing brain injury in human immunodeficiency virus-positive patients treated with antiretroviral therapy

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Abstract

Treatment with antiretroviral therapy (ART) has greatly reduced the incidence of dementia. The goal of this longitudinal study was to determine if there are ongoing macrostructural brain changes in human immunodeficiency virus—positive (HIV+) individuals treated with ART. To quantify brain structure, three-dimensional T1-weighted magnetic resonance imaging (MRI) scans were performed at baseline and again after 24 months in 39 HIV+ patients on ART and 30 HIV− controls. Longitudinal changes in brain volume were measured using tissue segmentation within regions of interest and deformation morphometry. Measured by tissue segmentation, HIV+ patients on ART had significantly (all P <.05) greater rates of white matter volume loss than HIV− control individuals. Compared with controls, the subgroup of HIV+ individuals on ART with viral suppression also had significantly greater rates of white matter volume loss. Deformation morphometry confirmed these results with more specific spatial localization. Deformation morphometry also detected greater rates of gray matter and white matter loss in the subgroup of HIV+ individuals with detectable viral loads. These results provide evidence of ongoing brain volume loss in HIV+ individuals on stable ART, possibly suggesting ongoing cerebral injury. The presence of continuing injury raises the possibility that HIV+ individuals—even in the presence of viral suppression in the periphery—are at greater risk for future cognitive impairments and dementia and possibly faster cognitive decline. Therefore, HIV+ individuals on ART should be monitored for cognitive decline, and treatments that reduce ongoing neurological injury should be considered.

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Correspondence to V. A. Cardenas.

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This work was supported in part by NIH grants P01 AA011493, R01 MH65392, and R03 EB 008136 and the Department of Veterans Affairs Research Service.

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Cardenas, V.A., Meyerhoff, D.J., Studholme, C. et al. Evidence for ongoing brain injury in human immunodeficiency virus-positive patients treated with antiretroviral therapy. Journal of NeuroVirology 15, 324–333 (2009). https://doi.org/10.1080/13550280902973960

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  • DOI: https://doi.org/10.1080/13550280902973960

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