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HIV cognitive impairment

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https://www.readbyqxmd.com/read/27906001/evolution-of-changes-in-cognitive-function-after-the-initiation-of-antiretroviral-therapy
#1
Borja Mora-Peris, Elizabeth Stevens, Francesca Ferretti, Jonathan Underwood, Stephen Taylor, Alan Winston
BACKGROUND: Cognitive function is reported to improve after the initiation of combination antiretroviral therapy (cART). Data on the evolution of such changes are limited. We assessed the dynamics of changes in cognitive parameters, in HIV-positive subjects initiating cART. METHODS: Cognitive function in seven domains was evaluated for HIV-infected patients without clinically significant cognitive impairment prior to the initiation of cART, and 24 and 48 weeks after...
April 14, 2016: AIDS Research and Therapy
https://www.readbyqxmd.com/read/27892704/the-effects-of-a-16-week-aerobic-exercise-programme-on-cognitive-function-in-people-living-with-hiv
#2
Adam McDermott, Lilia Zaporojan, Patricia McNamara, Colin P Doherty, Janice Redmond, Cuisle Forde, John Gormley, Mikel Egaña, Colm Bergin
High levels of cardiovascular fitness and physical activity are associated with higher levels of cognitive function in people with HIV, thus, they may reduce the risk of developing HIV-associated neurocognitive disorder (HAND). This study aimed to investigate the effects of a 16-week aerobic exercise intervention on cognitive function in people with HIV. Eleven participants living with HIV were recruited into the study. Participants were randomised into either an exercise group (n = 5), that completed a 16-week aerobic exercise programme training, 3 times per week (2 supervised sessions and one unsupervised session) or a control group (n = 6) that received no intervention...
November 28, 2016: AIDS Care
https://www.readbyqxmd.com/read/27888531/fate-of-microglia-during-hiv-1-infection-from-activation-to-senescence
#3
REVIEW
Natalie C Chen, Andrea T Partridge, Christian Sell, Claudio Torres, Julio Martín-García
Microglia support productive human immunodeficiency virus type 1 (HIV-1) infection and disturbed microglial function could contribute to the development of HIV-associated neurocognitive disorders (HAND). Better understanding of how HIV-1 infection and viral protein exposure modulate microglial function during the course of infection could lead to the identification of novel therapeutic targets for both the eradication of HIV-1 reservoir and treatment of neurocognitive deficits. This review first describes microglial origins and function in the normal central nervous system (CNS), and the changes that occur during aging...
November 26, 2016: Glia
https://www.readbyqxmd.com/read/27882497/soluble-tlr2-and-4-concentrations-in-cerebrospinal-fluid-in-hiv-siv-related-neuropathological-conditions
#4
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/27875832/remediating-hiv-associated-neurocognitive-disorders-via-cognitive-training-a-perspective-on-neurocognitive-aging
#5
David E Vance, Shameka L Cody, Linda Moneyham
Over 50% of adults with HIV exhibit some form of HIV-associated neurocognitive disorder, ranging from mild asymptomatic neurocognitive impairment to HIV-associated dementia. As adults age with HIV and become susceptible to cardiovascular and metabolic comorbidities, the prevalence and severity of such neurocognitive disorders are likely to increase. With compromised renal and hepatic functioning often accompanying HIV, pharmaceutical interventions to address such neurocognitive disorders may not be the best strategy and are not without risks...
2017: Interdisciplinary Topics in Gerontology and Geriatrics
https://www.readbyqxmd.com/read/27875827/disability-among-persons-aging-with-hiv-aids
#6
Suzanne G Leveille, Saurja Thapa
Persons surviving to older ages with HIV/AIDS often face an accelerated aging accompanied by increased comorbidity and decline in health and function. In this chapter, we review the process of disablement among persons aging with HIV/AIDS, from chronic conditions to impairments and functional limitations, leading to disability. Chronic immune activation related to chronic HIV infection may contribute to early development of chronic conditions that are common in older adults resulting in premature disablement...
2017: Interdisciplinary Topics in Gerontology and Geriatrics
https://www.readbyqxmd.com/read/27869500/lower-frailty-is-associated-with-successful-cognitive-aging-among-older-adults-with-hiv
#7
Lindsay Mk Wallace, Maria Ferrara, Thomas D Brothers, Sara Garlassi, Susan A Kirkland, Olga Theou, Stefano Zona, Cristina Mussini, David J Moore, Kenneth Rockwood, Giovanni Guaraldi
BACKGROUND: Aging with HIV poses unique and complex challenges, including avoidance of neurocognitive disorder. Our objective here is to identify the prevalence and predictors of successful cognitive aging (SCA) in sample of older adults with HIV. METHODS: One hundred three HIV-infected individuals aged 50 and older were recruited from the Modena HIV Metabolic Clinic in Italy. Participants were treated with combination antiretroviral therapy (cART) for at least one year and had suppressed plasma HIV viral load...
November 21, 2016: AIDS Research and Human Retroviruses
https://www.readbyqxmd.com/read/27862491/alarmins-and-central-nervous-system-inflammation-in-hiv-associated-neurological-disorders
#8
M-L Gougeon
In the era of highly active antiretroviral therapy (HAART), HIV-1-associated neurocognitive disorders (HAND) persist in infected individuals with adequate immunological and virological status. Risk factors for cognitive impairment include hepatitis C virus co-infection, host genetic factors predisposing to HAND, the early establishment of the virus in the CNS and its persistence under HAART; thus, the CNS is an important reservoir for HIV. Microglial cells are permissive to HIV-1, and NLRP3 inflammasome-associated genes were found expressed in brains of HIV-1-infected persons, contributing to brain disease...
November 16, 2016: Journal of Internal Medicine
https://www.readbyqxmd.com/read/27861242/higher-cystatin-c-levels-are-associated-with-neurocognitive-impairment-in-older-hiv-adults
#9
Marissa E Sakoda, Pariya L Fazeli, Ronald J Ellis, Dilip V Jeste, Igor Grant, Scott L Letendre, David J Moore
OBJECTIVE: The study aims to determine whether cystatin C is associated with HIV disease and HIV-associated neurocognitive impairment (NCI). METHODS: Participants included 124 (HIV+ n = 77; HIV- n = 47) older adults (age ≥ 50 years) examined at the UCSD HIV Neurobehavioral Research Program. Cystatin C, a biomarker of kidney functioning that has been linked to poor health outcomes, was measured in blood. Participants completed a comprehensive neurocognitive assessment that was used to define both global and domain NCI...
November 15, 2016: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/27856673/associations-of-memory-and-executive-functioning-with-academic-and-adaptive-functioning-among-youth-with-perinatal-hiv-exposure-and-or-infection
#10
Patricia A Sirois, Miriam C Chernoff, Kathleen M Malee, Patricia A Garvie, Lynnette L Harris, Paige L Williams, Steven P Woods, Molly L Nozyce, Betsy L Kammerer, Cenk Yildirim, Sharon L Nichols
BACKGROUND: Perinatally acquired HIV (PHIV) confers risk for neurocognitive impairment, which potentially affects school performance and functional independence of infected children. In this study, we examined the associations of 2 key neurocognitive domains, memory and executive function (EF), with academic and adaptive skills among youth with PHIV and perinatally HIV-exposed but uninfected (PHEU) youth. METHODS: Participants ages 9 to <19 years enrolled in the Pediatric HIV/AIDS Cohort Study's Memory and Executive Functioning Study completed standardized measures of reading and math...
December 2016: Journal of the Pediatric Infectious Diseases Society
https://www.readbyqxmd.com/read/27835616/association-of-cognitive-activity-and-neurocognitive-function-in-blacks-and-whites-with-hiv
#11
Kristin R Krueger, Oluwatoyian Adeyemi, Sue Leurgans, Raj C Shah, Antonio D Jimenez, Lawrence Ouellet, Alan L Landay, David A Bennett, Lisa L Barnes
OBJECTIVE: Older persons with HIV are at risk for impaired cognition, yet there is limited information on modifiable factors associated with neurocognitive function in this group. DESIGN: This is a cross-sectional observational study of cognitive activities and neurocognitive function. METHODS: We examined the relation between frequency of cognitive activity and current neurocognitive performance in 176 older persons with HIV (70% African American, 76% male; mean age = 58...
November 9, 2016: AIDS
https://www.readbyqxmd.com/read/27833555/ginkgolic-acid-protects-against-a%C3%AE-induced-synaptic-dysfunction-in-the-hippocampus
#12
Dalila Mango, Filippo Weisz, Robert Nisticò
Ginkgo leaf is the most used form of supplement for cognitive ailments. The standardized extract formulation EGb 761 is a dietary supplement with proven benefit in several neurological and psychiatric conditions including memory decline in Alzheimer's disease, schizophrenia and dementia. Ginkgolic acid (GA) is a component of this extract which shows pleiotropic effects including antitumoral and anti-HIV action; however, its effect on memory is still unknown. Here, we carried out an electrophysiological analysis to investigate the effects of GA on long term potentiation and synaptic transmission at CA1 hippocampal synapses...
2016: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/27828876/improving-detection-of-hiv-associated-cognitive-impairment-comparison-of-the-international-hiv-dementia-scale-and-a-brief-screening-battery
#13
Sergio Monteiro de Almeida, Rujvi Kamat, Mariana Cherner, Anya Umlauf, Clea Elisa Ribeiro, Ana Paula de Pereira, Donald Franklin, Robert K Heaton, Ronald J Ellis
OBJECTIVES: The International HIV Dementia Scale (IHDS) was developed to screen for HIV-associated dementia (HAD), but it has been used more generally for HIV-associated neurocognitive disorder (HAND). This study sought to examine the accuracy of the IHDS in a cohort of Brazilian HIV-infected individuals and compare its performance to an alternative screening battery for detecting HAND. METHODS: 108 participants (including 60 HIV-infected persons), completed the IHDS and a gold standard neuropsychological (NP) battery of 17 tests...
November 4, 2016: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/27822047/a-pilot-study-of-cognitive-training-with-and-without-transcranial-direct-current-stimulation-to-improve-cognition-in-older-persons-with-hiv-related-cognitive-impairment
#14
Raymond L Ownby, Amarilis Acevedo
BACKGROUND: In spite of treatment advances, HIV infection is associated with cognitive deficits. This is even more important as many persons with HIV infection age and experience age-related cognitive impairments. Both computer-based cognitive training and transcranial direct current stimulation (tDCS) have shown promise as interventions to improve cognitive function. In this study, we investigate the acceptability and efficacy of cognitive training with and without tDCS in older persons with HIV...
2016: Neuropsychiatric Disease and Treatment
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/27812290/tryptophan-metabolism-and-its-relationship-with-depression-and-cognitive-impairment-among-hiv-infected-individuals
#16
Michael R Keegan, Seetharamaiah Chittiprol, Scott L Letendre, Alan Winston, Dietmar Fuchs, Adriano Boasso, Jennifer Iudicello, Ronald J Ellis
OBJECTIVE: Cognitive impairment (CI) and major depressive disorder (MDD) remain prevalent in treated HIV-1 disease; however, the pathogenesis remains elusive. A possible contributing mechanism is immune-mediated degradation of tryptophan (TRP) via the kynurenine (KYN) pathway, resulting in decreased production of serotonin and accumulation of TRP degradation products. We explored the association of these biochemical pathways and their relationship with CI and MDD in HIV-positive (HIV+) individuals...
2016: International Journal of Tryptophan Research: IJTR
https://www.readbyqxmd.com/read/27810933/nmdars-adapt-to-neurotoxic-hiv-protein-tat-downstream-of-a-glun2a-ubiquitin-ligase-signaling-pathway
#17
Matthew V Green, Stanley A Thayer
: HIV-associated neurocognitive disorder (HAND) affects about half of HIV-infected patients. Infected non-neuronal cells release neurotoxic factors such as the viral protein, transactivator of transcription (Tat), that potentiate NMDAR function. NMDARs regulate synaptic changes observed following exposure to HIV proteins, which may underlie cognitive impairment in HAND patients. Here we used patch-clamp recording to measure NMDAR-mediated currents in rat hippocampal cultures following exposure to Tat...
November 3, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27807176/hiv-tat-impairs-neurogenesis-through-functioning-as-a-notch-ligand-and-activation-of-notch-signaling-pathway
#18
Yan Fan, Xiang Gao, Jinhui Chen, Ying Liu, Johnny J He
: Alterations in adult neurogenesis have been noted in the brain of HIV-infected individuals and are likely linked to HIV-associated neurocognitive deficits, including those in learning and memory. But the underlying molecular mechanisms are not fully understood. In the study, we took advantage of doxycycline-inducible and astrocyte-specific HIV-1 Tat transgenic mice (iTat) and determined the relationship between Tat expression and neurogenesis. Tat expression in astrocytes was associated with fewer neuron progenitor cells (NPCs), fewer immature neurons, and fewer mature neurons in the dentate gyrus of the hippocampus of the mouse brain...
November 2, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27798498/hiv-associated-neurocognitive-disorder
#19
David B Clifford
PURPOSE OF REVIEW: HIV-associated neurocognitive disease is the most active topic for neuroAIDS investigations at present. Although impairment is mild in patients successfully treated with modern antiviral regimens, it remains an ongoing problem for HIV patients. It is important to update the emerging research concerning HIV-associated neurocognitive disease. RECENT FINDINGS: The virus enters the brain during acute infection, with evidence for abnormal functioning that may occur early and often persists...
October 27, 2016: Current Opinion in Infectious Diseases
https://www.readbyqxmd.com/read/27794019/latent-toxoplasma-infection-and-higher-toxoplasma-gondii-immunoglobulin-g-levels-are-associated-with-worse-neurocognitive-functioning-in-hiv-infected-adults
#20
Ajay R Bharti, Allen McCutchan, Reena Deutsch, Davey M Smith, Ronald J Ellis, Mariana Cherner, Steven P Woods, Robert K Heaton, Igor Grant, Scott L Letendre
BACKGROUND:  Human immunodeficiency virus (HIV)-associated neurocognitive disorders persist despite suppressive antiretroviral therapy (ART). Because latent Toxoplasma infection (LTI) may adversely impact brain function, we investigated its impact on neurocognitive impairment (NCI) in people living with HIV disease. METHODS:  Two hundred sixty-three HIV-infected adults underwent comprehensive neurocognitive assessments and had anti-Toxoplasma gondii immunoglobulin G (anti-Toxo IgG) measured by qualitative and quantitative enzyme-linked immunosorbent assays...
October 28, 2016: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
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