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Gene expression for HIV-associated dementia and HIV encephalitis in microdissected neurons 1: preliminary analysis

Authors Shapshak P, Duncan R, Duran EM, Farinetti F, Minagar A, Commins D, Rodriguez H, Chiappelli F, Kangueane P, Levine AJ, Singer E, Somboonwit C, Sinnott JT

Published 19 July 2011 Volume 2011:3 Pages 53—78

DOI http://dx.doi.org/10.2147/NBHIV.S13566

Review by Single-blind

Peer reviewer comments 4

Paul Shapshak1,2, Robert Duncan3, E Margarita Duran4, Fabiana Farinetti5, Alireza Minagar6, Deborah Commins7,8, Hector Rodriguez9, Francesco Chiappelli10, Pandajarasamme Kangueane11,12, Andrew J Levine8,13, Elyse Singer8,13, Charurut Somboonwit1,14, John T Sinnott1,14
1Division of Infectious Disease and International Medicine, Tampa General Hospital, USF Health, Tampa, FL, USA; 2Department of Psychiatry and Behavioral Medicine, University of South Florida, College of Medicine, Tampa, FL, USA; 3Division of Biostatistics, Department of Epidemiology and Public Health, University of Miami Miller School of Medicine, Miami, FL, USA; 4Viral Oncology Program, Sylvester Cancer Center, University of Miami Miller School of Medicine, Miami, FL, USA; 5Internal Medicine/Pediatrics, King's Daughter Medical Center, Ironton, OH, USA; 6Department of Neurology, Louisiana State University Health Sciences Center, Shreveport, LA, USA; 7Department of Pathology, USC School of Medicine, Los Angeles, CA, USA; 8National Neurological AIDS Bank, UCLA School of Medicine, Westwood, CA, USA; 9Department of Biology, University of Miami, Coral Gables, FL, USA; 10Division of Oral Biology and Medicine, UCLA School of Dentistry, Los Angeles, CA, USA; 11Biomedical Informatics, Pondicherry, India; 12Asian Institute of Medicine, Science and Technology University, Bedong, Kedah, Malaysia; 13Department of Neurology, UCLA School of Medicine, Westwood, CA, USA; 14Clinical Research Unit, Hillsborough Health Department, Tampa, FL, USA

Abstract: We analyzed gene expression in neurons from 16 cases divided into four groups, ie, human immunodeficiency virus (HIV)-associated dementia (HAD)/HIV encephalitis (HAD/HIVE), HAD alone, HIVE alone, and HIV positive alone. We produced the neurons using laser capture microdissection from cryopreserved basal ganglia (specifically globus pallidus). Gene expression in pooled neurons from each case was analyzed on GE CodeLink Microarray chips with 55,000 gene fragments per chip. One-way analysis of variance showed significant changes in expression of 197 genes among the four groups (P < 0.005). The three groups, ie, HAD/HIVE, HAD alone, and HIVE alone, were compared with the HIV-positive group using Fisher's least significant difference test, and associated gene expression changes were assigned to each of the three comparisons. Identified genes were associated with 159 functional categories and many of the genes had more than one function. The functional groups included adhesion, amyloid, apoptosis, channel complex, cell cycle, chaperone, chromatin, cytokine, cytoskeleton, metabolism, mitochondria, multinetwork detection protein, sensory perception, receptor, ribosome, noncoding miRNA, signaling, synapse, transcription factor, homeobox, transport, multidrug resistance, and ubiquitin cycle. Several genes were associated with other neurodegenerative and developmental diseases, including Alzheimer's disease, Huntington's disease, and diGeorge syndrome. Thus, a wide range of dysregulated biochemical processes was reported in neuroanatomically precise neurons. This line of investigation is useful and provides specific information about gene expression dysfunction in NeuroAIDS.

Keywords: NeuroAIDS, human immunodeficiency virus, dementia, encephalitis, laser capture microdissection, globus pallidus, neuron, genes, expression

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