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Neuroimaging studies of the aging HIV-1-infected brain

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Abstract

Highly active antiretroviral therapy (HAART) has increased life expectancy among HIV-infected individuals, and by 2015, at least half of all HIV-infected individuals will be over 50 years of age. Neurodegenerative processes associated with aging may be facilitated by HIV-1 infection, resulting in premature brain aging. This review will highlight brain abnormalities in HIV patients in the setting of aging, focusing on recent neuroimaging studies of the structural, physiological, functional and neurochemical changes. Magnetic resonance imaging (MRI) and magnetic resonance spectroscopy studies performed during the pre-HAART era or on antiretroviral-naive subjects suggest an accelerated aging process, while those on HAART-treated subjects suggest premature brain atrophy. Diffusion tensor imaging studies yielded conflicting findings on the relationship between HIV and age in neuroasymptomatic individuals. Functional MRI studies found evidence of premature or accelerated aging processes in the brains of HIV subjects. Lastly, many age-related illnesses such as diabetes, stroke, and depression, as well as comorbid substance abuse, may further exacerbate the aging process in the HIV-infected brain, leading to premature or accelerated age-related brain changes. Given the different pathologic or physiologic changes in the brain assessed by the different neuroimaging techniques, using a multimodal approach in longitudinal follow-up studies is recommended for future studies.

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  1. Division of Neurology, Department of Medicine, John A. Burns School of Medicine, University of Hawai’i at Manoa, 7th Floor University Tower, 1356 Lusitana Street, Honolulu, HI, 96813, USA

    John L. Holt, Stephanie D. Kraft-Terry & Linda Chang

  2. The Queen’s Medical Center, Honolulu, HI, 96813, USA

    John L. Holt, Stephanie D. Kraft-Terry & Linda Chang

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  1. John L. Holt
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Holt, J.L., Kraft-Terry, S.D. & Chang, L. Neuroimaging studies of the aging HIV-1-infected brain. J. Neurovirol. 18, 291–302 (2012). https://doi.org/10.1007/s13365-012-0114-1

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