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Journal of Neurovirology

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https://www.readbyqxmd.com/read/27995576/serine-residues-at-positions-162-and-166-of-the-rabies-virus-phosphoprotein-are-critical-for-the-induction-of-oxidative-stress-in-rabies-virus-infection
#1
Wafa Kammouni, Heidi Wood, Alan C Jackson
Our previous work in a mouse model of experimental rabies showed neuronal process (dendrites and axons) degeneration in association with severe clinical disease. Cultured adult rodent dorsal root ganglion (DRG) neurons infected with the challenge virus standard-11 (CVS) strain of rabies virus (RABV) showed axonal swellings and reduced axonal growth with evidence of oxidative stress. We have shown that CVS infection alters a variety of mitochondrial parameters and increases mitochondrial complex I activity and reactive oxygen species (ROS) production...
December 19, 2016: Journal of Neurovirology
https://www.readbyqxmd.com/read/27995575/cerebrospinal-fluid-biomarkers-and-hiv-associated-neurocognitive-disorders-in-hiv-infected-individuals-in-rakai-uganda
#2
Mahsa Abassi, Bozena M Morawski, Gertrude Nakigozi, Noeline Nakasujja, Xiangrong Kong, David B Meya, Kevin Robertson, Ronald Gray, Maria J Wawer, Ned Sacktor, David R Boulware
In the USA, increased cerebrospinal fluid (CSF) inflammatory cytokines have been observed in antiretroviral therapy (ART)-naive, HIV-seropositive individuals with HIV-associated neurocognitive disorder (HAND). We characterized the relationship between HAND and CSF biomarker expression in ART-naive, HIV-seropositive individuals in Rakai, Uganda. We analyzed CSF of 78 HIV-seropositive, ART-naive Ugandan adults for 17 cytokines and 20 neurodegenerative biomarkers via Luminex multiplex assay. These adults underwent neurocognitive assessment to determine their degree of HAND...
December 19, 2016: Journal of Neurovirology
https://www.readbyqxmd.com/read/27981441/distribution-of-cellular-hsv-1-receptor-expression-in-human-brain
#3
Richard Lathe, Juergen G Haas
Herpes simplex virus type 1 (HSV-1) is a neurotropic virus linked to a range of acute and chronic neurological disorders affecting distinct regions of the brain. Unusually, HSV-1 entry into cells requires the interaction of viral proteins glycoprotein D (gD) and glycoprotein B (gB) with distinct cellular receptor proteins. Several different gD and gB receptors have been identified, including TNFRSF14/HVEM and PVRL1/nectin 1 as gD receptors and PILRA, MAG, and MYH9 as gB receptors. We investigated the expression of these receptor molecules in different areas of the adult and developing human brain using online transcriptome databases...
December 15, 2016: Journal of Neurovirology
https://www.readbyqxmd.com/read/27981440/visceral-fat-is-associated-with-brain-structure-independent-of-human-immunodeficiency-virus-infection-status
#4
Jordan E Lake, Mikhail Popov, Wendy S Post, Frank J Palella, Ned Sacktor, Eric N Miller, Todd T Brown, James T Becker
The combined effects of human immunodeficiency virus (HIV), obesity, and elevated visceral adipose tissue (VAT) on brain structure are unknown. In a cross-sectional analysis of Multicenter AIDS Cohort Study (MACS) participants, we determined associations between HIV serostatus, adiposity, and brain structure. Men (133 HIV+, 84 HIV-) in the MACS Cardiovascular 2 and magnetic resonance imaging (MRI) sub-studies with CT-quantified VAT and whole brain MRI measured within 1 year were assessed. Voxel-based morphometry analyzed brain volumes...
December 15, 2016: Journal of Neurovirology
https://www.readbyqxmd.com/read/27943048/vocal-emotion-processing-deficits-in-hiv-infected-individuals
#5
A González-Baeza, J R Arribas, I Pérez-Valero, S Monge, C Bayón, P Martín, S Rubio, F Carvajal
We aimed to explore the brain imaging correlates of vocal emotion processing in a group of HIV+ individuals and to compare the vocal emotion processing of HIV+ individuals with a group of healthy adults. We conducted multiple linear regressions to determine the cerebral correlates of a newly designed vocal emotion processing test in a sub-group of HIV+ individuals who completed the cerebral magnetic resonance scan (n = 36). Separately, we test whether the association between our test scores and each cerebral measure persisted regardless of the presence of neurocognitive impairment...
December 9, 2016: Journal of Neurovirology
https://www.readbyqxmd.com/read/27921220/increased-cell-free-mitochondrial-dna-is-a-marker-of-ongoing-inflammation-and-better-neurocognitive-function-in-virologically-suppressed-hiv-infected-individuals
#6
Josué Pérez-Santiago, Michelli F De Oliveira, Susanna R Var, Tyler R C Day, Steven P Woods, Sara Gianella, Sanjay R Mehta
Cell-free mitochondrial DNA (mtDNA) is a highly immunogenic molecule that is associated with several inflammatory conditions and with neurocognitive impairment during untreated HIV infection. Here, we investigate how cell-free mtDNA in cerebrospinal fluid (CSF) is associated with inflammation, neuronal damage, and neurocognitive functioning in the context of long-term suppressive antiretroviral therapy (ART). We quantified the levels of cell-free mtDNA in the CSF from 41 HIV-infected individuals with completely suppressed HIV RNA levels in blood plasma (<50 copies/mL) by droplet digital PCR...
December 5, 2016: Journal of Neurovirology
https://www.readbyqxmd.com/read/27913960/neuroimaging-abnormalities-in-clade-c-hiv-are-independent-of-tat-genetic-diversity
#7
Robert H Paul, Sarah Phillips, Jacqueline Hoare, David H Laidlaw, Ryan Cabeen, Gayla R Olbricht, Yuqing Su, Dan J Stein, Susan Engelbrecht, Soraya Seedat, Lauren E Salminen, Laurie M Baker, Jodi Heaps, John Joska
Controversy remains regarding the neurotoxicity of clade C human immunodeficiency virus (HIV-C). When examined in preclinical studies, a cysteine to serine substitution in the C31 dicysteine motif of the HIV-C Tat protein (C31S) results in less severe brain injury compared to other viral clades. By contrast, patient cohort studies identify significant neuropsychological impairment among HIV-C individuals independent of Tat variability. The present study clarified this discrepancy by examining neuroimaging markers of brain integrity among HIV-C individuals with and without the Tat substitution...
December 2, 2016: Journal of Neurovirology
https://www.readbyqxmd.com/read/27913959/reaction-of-complement-factors-and-proteasomes-in-experimental-encephalitis
#8
Stefan Lange, Tomas Bergström, Ewa Johansson, Merna Oshalim, Ivar Lönnroth
Herpes simplex virus type 1 (HSV-1) encephalitis causes a deleterious inflammation and elevated intracranial pressure. As a step towards examining the origin of the inflammation, we here report the response of circulating proteasomes and complement factors in blood and cerebrospinal fluid (CSF) in rats infected with HSV-1. Infection was via the nasal route, with 1.1 × 10(4) plaque-forming units of HSV-1 strain 2762 given in one or both nostrils. A sandwich enzyme-linked immunosorbent assay was used to study the level of 26S proteasomes and their complex formation with complement factors 3 and 4...
December 2, 2016: Journal of Neurovirology
https://www.readbyqxmd.com/read/27896574/cognitive-function-in-early-hiv-infection
#9
Aanchal Prakash, Jue Hou, Lei Liu, Yi Gao, Casey Kettering, Ann B Ragin
This study aimed to examine cognitive function in acute/early HIV infection over the subsequent 2 years. Fifty-six HIV+ subjects and 21 seronegative participants of the Chicago Early HIV Infection Study were evaluated using a comprehensive neuropsychological assessment at study enrollment and at 2-year follow-up. Cognitive performance measures were compared in the groups using t tests and mixed-effect models. Patterns of relationship with clinical measures were determined between cognitive function and clinical status markers using Spearman's correlations...
November 28, 2016: Journal of Neurovirology
https://www.readbyqxmd.com/read/27896573/greater-decline-in-memory-and-global-neurocognitive-function-in-hiv-hepatitis-c-co-infected-than-in-hepatitis-c-mono-infected-patients-treated-with-pegylated-interferon-and-ribavirin
#10
Theodore R Miller, Jeffrey J Weiss, Norbert Bräu, Douglas T Dieterich, Alicia Stivala, Monica Rivera-Mindt
The human immunodeficiency virus (HIV), hepatitis C virus (HCV), and the treatment of HCV with pegylated interferon and ribavirin (IFN/RBV) have been associated with neurocognitive and psychiatric abnormalities. The goal of this research was to prospectively evaluate neurocognitive functioning among a group of HCV mono-infected and HIV/HCV co-infected patients during the first 24 weeks of IFN/RBV treatment while accounting for practice effects, normal variations in change over time, and variations in IFN/RBV treatment exposure...
November 28, 2016: Journal of Neurovirology
https://www.readbyqxmd.com/read/27889886/association-of-midlife-smoking-status-with-change-in-processing-speed-and-mental-flexibility-among-hiv-seropositive-and-hiv-seronegative-older-men-the-multicenter-aids-cohort-study
#11
Wajiha Z Akhtar-Khaleel, Robert L Cook, Steve Shoptaw, Eric N Miller, Ned Sacktor, Pamela J Surkan, Jim Becker, Linda A Teplin, Rebecca J Beyth, Catherine Price, Michael Plankey
Smoking is a potential risk factor for age-related cognitive decline. To date, no study has examined the association between smoking and cognitive decline in men living with human immunodeficiency virus (HIV). The aim of this present study is to examine whether smoking status and severity in midlife is associated with a rate of decline in cognitive processing speed among older HIV-seropositive and HIV-seronegative men who have sex with men. Data from 591 older HIV-seropositive and HIV-seronegative men who have sex with men from the Multicenter AIDS Cohort Study were examined...
November 26, 2016: Journal of Neurovirology
https://www.readbyqxmd.com/read/27882497/soluble-tlr2-and-4-concentrations-in-cerebrospinal-fluid-in-hiv-siv-related-neuropathological-conditions
#12
Khutso M Mothapo, J Ten Oever, P Koopmans, F F Stelma, S Burm, J Bajramovic, M M Verbeek, M G Olde Rikkert, M G Netea, G Koopman, A J van der Ven
HIV in the central nervous system (CNS) mainly infects microglial cells which are known to express toll-like receptors (TLRs). This paper aimed to study the role of soluble TLR2 (sTLR2), sTLR4, and other inflammatory markers in cerebrospinal fluid (CSF) in HIV/Simian immunodeficiency virus (SIV)-related neurological sequelae. We determined sTLR2 and sTLR4 levels in CSF and serum/plasma of SIV-infected rhesus macaques with and without neurological sequelae, as well as in HIV-infected patients with and without cognitive impairments and Alzheimer's disease (AD) patients and matched controls...
November 23, 2016: Journal of Neurovirology
https://www.readbyqxmd.com/read/27878471/cerebrospinal-fluid-anti-epstein-barr-virus-specific-oligoclonal-igm-and-igg-bands-in-patients-with-clinically-isolated-and-guillain-barr%C3%A3-syndrome
#13
Diana Ferraro, Veronica Galli, Anna Maria Simone, Roberta Bedin, Francesca Vitetta, Elisa Merelli, Paolo Frigio Nichelli, Patrizia Sola
Epstein-Barr virus (EBV) has been implicated in multiple sclerosis (MS) pathogenesis. We aimed to assess the frequency of EBV-specific IgG and IgM oligoclonal bands (OCB) in cerebrospinal fluid (CSF) of 50 patients with clinically isolated syndrome (CIS) and in 27 controls with Guillain-Barré syndrome (GBS). Furthermore, we assessed correlations between the presence of OCB and CIS patients' CSF, MRI, and clinical variables. There was no difference in the proportion of CIS and GB patients with positivity for anti-EBV-specific IgG/IgM OCB...
November 22, 2016: Journal of Neurovirology
https://www.readbyqxmd.com/read/27873219/immortalization-of-primary-microglia-a-new-platform-to-study-hiv-regulation-in-the-central-nervous-system
#14
Yoelvis Garcia-Mesa, Taylor R Jay, Mary Ann Checkley, Benjamin Luttge, Curtis Dobrowolski, Saba Valadkhan, Gary E Landreth, Jonathan Karn, David Alvarez-Carbonell
The major reservoirs for HIV in the CNS are in the microglia, perivascular macrophages, and to a lesser extent, astrocytes. To study the molecular events controlling HIV expression in the microglia, we developed a reliable and robust method to immortalize microglial cells from primary glia from fresh CNS tissues and commercially available frozen glial cells. Primary human cells, including cells obtained from adult brain tissue, were transformed with lentiviral vectors expressing SV40 T antigen or a combination of SVR40 T antigen and hTERT...
November 21, 2016: Journal of Neurovirology
https://www.readbyqxmd.com/read/27815816/a-decreasing-cd4-cd8-ratio-over-time-and-lower-csf-penetrating-antiretroviral-regimens-are-associated-with-a-higher-risk-of-neurocognitive-deterioration-independently-of-viral-replication
#15
Matteo Vassallo, R Fabre, J Durant, C Lebrun-Frenay, H Joly, M Ticchioni, F DeSalvador, A Harvey-Langton, B Dunais, M Laffon, J Cottalorda, P Dellamonica, C Pradier
Persistent immune activation is one of the suspected causes of HIV-associated neurocognitive disorders (HAND) in cART era. The CD4/CD8 ratio has been recently showed as a marker of immune activation and HAND. Our aim was to analyze if a decrease in the CD4/CD8 ratio over time could have an impact on neurocognitive deterioration. Randomly selected HIV-infected patients were followed for neuropsychological (NP) testing during a period of almost 2 years. Tests were adjusted for age, gender, and education. Patients were divided into 5 groups: normal tests (NT), neuropsychological deficit (ND, one impaired cognitive domain), asymptomatic neurocognitive disorders (ANI), mild neurocognitive disorders (MND), and HIV-associated dementia (HAD)...
November 4, 2016: Journal of Neurovirology
https://www.readbyqxmd.com/read/27812788/jc-polyomavirus-expression-and-bell-shaped-regulation-of-its-sf2-asf-suppressor-during-the-follow-up-of-multiple-sclerosis-patients-treated-with-natalizumab
#16
Elena Uleri, Gabriele Ibba, Claudia Piu, Maurizio Caocci, Stefania Leoni, Giannina Arru, Caterina Serra, GianPietro Sechi, Antonina Dolei
Natalizumab is effective against multiple sclerosis (MS), but is associated with progressive multifocal leukoencephalopathy (PML), fatal disease caused by the JCV polyomavirus. The SF2/ASF (splicing factor2/alternative splicing factor) inhibits JCV in glial cells. We wondered about SF2/ASF modulation in the blood of natalizumab-treated patients and if this could influence JCV reactivation. Therefore, we performed a longitudinal study of MS patients under natalizumab, in comparison to patients under fingolimod and to healthy blood donors...
November 3, 2016: Journal of Neurovirology
https://www.readbyqxmd.com/read/27787806/acyclovir-resistance-in-herpes-simplex-virus-type-i-encephalitis-a-case-report
#17
M Bergmann, R Beer, M Kofler, R Helbok, B Pfausler, E Schmutzhard
Acyclovir resistance is rarely seen in herpes simplex virus (HSV) type I encephalitis. Prevalence rates vary between 0.5 % in immunocompetent patients (Christophers et al. 1998; Fife et al. 1994) and 3.5-10 % in immunocompromised patients (Stranska et al. 2005). We report a 45-year-old, immunocompetent (negative HIV antigen/antibody testing), female patient, without previous illness who developed-after a febrile prodromal stage-aphasia and psychomotor slowing. Cerebral magnetic resonance imaging (cMRI) showed right temporal and insular T2-hyperintense lesions with spreading to the contralateral temporal lobe...
October 27, 2016: Journal of Neurovirology
https://www.readbyqxmd.com/read/27730447/statistical-analysis-of-pml-incidences-of-natalizumab-treated-patients-from-2009-to-2016-outcomes-after-introduction-of-the-stratify-jcv%C3%A2-dxselect%C3%A2-antibody-assay
#18
LETTER
Denise Campagnolo, Qunming Dong, Lily Lee, Pei-Ran Ho, Diogo Amarante, Harold Koendgen
No abstract text is available yet for this article.
December 2016: Journal of Neurovirology
https://www.readbyqxmd.com/read/27566181/adenovirus-mediated-shrna-interference-against-hsv-1-replication-in-vitro
#19
Bo Song, Xinjing Liu, Qingzhi Wang, Rui Zhang, Ting Yang, Zhiqiang Han, Yuming Xu
The UL29 and UL28 proteins encoded by herpes simplex virus type 1 (HSV-1) are critical for its replication and packaging, respectively. Research has demonstrated that synthesized siRNA molecules targeting the UL29 gene are able to suppress HSV-2 replication and the UL28-null HSV-1 gene cannot form infectious viruses in vitro. Silencing the UL28 and UL29 genes by RNAi might lead to the development of novel antiviral agents for the treatment of HSV-1 infections. Two kinds of short hairpin RNAs (shRNAs) targeting the UL29 and UL28 genes were chemically synthesized and then delivered into cells by a replication-defective human adenovirus type 5 (Adv5) vector...
December 2016: Journal of Neurovirology
https://www.readbyqxmd.com/read/27431676/suicide-risk-and-prevalence-of-major-depressive-disorder-mdd-among-individuals-infected-with-hiv-1-subtype-c-versus-b-in-southern-brazil
#20
Sergio Monteiro de Almeida, Francisco Jaime Barbosa, Rujvi Kamat, Ana Paula de Pereira, Sonia Mara Raboni, Indianara Rotta, Clea Elisa Ribeiro, Mariana Cherner, Ronald J Ellis, Joseph Hampton Atkinson
Major depressive disorder (MDD) is among the most prevalent neuropsychiatric disorders associated with HIV infection; however, its risks and neurobiologic correlates in diverse cultures are poorly understood. This study aimed to examine the frequency of MDD among HIV+ participants in southern Brazil. We hypothesized that the frequency and severity of MDD would be higher among individuals with HIV+ compared with HIV- and higher in HIV subtype B compared with C. Individuals with HIV (n = 39) as well as seronegative controls (n = 22) were enrolled in a cross-sectional, prospective, observational study...
December 2016: Journal of Neurovirology
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