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Greater Than Age-Related Changes in Brain Diffusion of HIV Patients After 1 Year

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Abstract

Chronic infection with HIV is associated with neuroinflammation. Prior diffusion tensor imaging (DTI) studies demonstrated increased mean diffusion (MD) and decreased fractional anisotropy (FA) in the white matter (WM) and subcortical brain regions of HIV patients. The current study aims to detect whether there are greater than age-related brain changes in HIV patients after a 1-year follow-up period using DTI. Thirty-nine antiretroviral-stable HIV subjects and 32 HIV-seronegative (SN) controls were evaluated, with neuropsychological tests and DTI, at baseline and after 1 year. MD and FA in the genu and splenium of the corpus callosum and in six other subcortical and white matter regions were evaluated bilaterally. Compared to SN controls, HIV subjects had significantly higher MD in the frontal WM (p = 0.0104) and lower FA in the parietal WM (p = 0.006). After 1 year, HIV subjects showed increase in MD in frontal and parietal WM, putamen, and genu; HIV subjects also showed greater increased genu diffusion than SN controls (p = 0.005). Changes in global cognitive deficit score correlated with changes in MD in the genu and FA in the parietal and frontal WM and putamen (multiple regression, p = 0.0008). Lastly, normal age-dependent changes in frontal WM diffusion and FA in genu and putamen were not observed in HIV subjects. Since increased MD may reflect increased neuroinflammation, our findings suggest greater than normal age-related inflammatory changes in the genu of these HIV patients, which may contribute to the cognitive deficits. Measurements of MD in the genu may be useful for monitoring disease progression in HIV brain infection.

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Acknowledgements

We thank our research participants and support by the NIH (2R01MH61427; K24-DA16170; K02-DA16991; 5P20-RR11091; G12-RR003061) and the Office of National Drug Control Policy (ONDCP). We also thank Kenneth Yue, PhD; Daniel Alicata, MD, PhD; Renat Yakupov, MS; Grace Crocket, BA; and Caroline Jiang, MS, for their assistance in data collection or analyses.

Disclosure

Dr. Miller is the author and distributor of the CalCAP program and has a financial interest in this software.

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Authors and Affiliations

  1. Department of Medicine, Division of Neurology, John A. Burns School of Medicine, University of Hawaii at Manoa, and The Queen’s Medical Center, University Tower, 1356 Lusitana Street, Honolulu, HI, 96813, USA

    Linda Chang, Victoria Wong, Michael Watters, Darlene Ramones, Christine Cloak & Thomas Ernst

  2. Department of Psychiatry, John A. Burns School of Medicine, University of Hawaii at Manoa, and The Queen’s Medical Center, Honolulu, HI, 96813, USA

    Helanna Nakama

  3. Department of Psychiatry, Semel Institute for Neuroscience, University of California, Los Angeles, 2191 Franz Hall, Los Angeles, CA, 90095, USA

    Eric N. Miller

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  1. Linda Chang
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Correspondence to Linda Chang.

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Chang, L., Wong, V., Nakama, H. et al. Greater Than Age-Related Changes in Brain Diffusion of HIV Patients After 1 Year. J Neuroimmune Pharmacol 3, 265–274 (2008). https://doi.org/10.1007/s11481-008-9120-8

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  • DOI: https://doi.org/10.1007/s11481-008-9120-8

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