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Hiv associated neurocognitive disorder

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https://www.readbyqxmd.com/read/28902679/brief-report-peripheral-monocyte-macrophage-phenotypes-associated-with-the-evolution-of-cognitive-performance-in-hiv-infected-patients
#1
Massimiliano Fabbiani, Antonio Muscatello, Paolo Perseghin, Marco Bani, Arianna Incontri, Nicola Squillace, Giuseppe Lapadula, Andrea Gori, Alessandra Bandera
BACKGROUND: The contribution of monocyte activation in the development of HIV-associated neurocognitive disorders is not completely understood. This study aimed to explore the predictive value of peripheral monocyte/macrophage (M/M) phenotypes on the evolution of cognitive performance in a population of virologically suppressed HIV-infected patients. SETTING: Prospective, observational, longitudinal study. METHODS: HIV-1-infected patients with HIV-RNA <50copies/mL for >12 months underwent neuropsychological examination at baseline and after 1 year...
October 1, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/28900395/astrocyte-senescence-and-metabolic-changes-in-response-to-hiv-antiretroviral-therapy-drugs
#2
Justin Cohen, Luca D'Agostino, Joel Wilson, Ferit Tuzer, Claudio Torres
With the advent of highly active antiretroviral therapy (HAART) survival rates among patients infected by HIV have increased. However, even though survival has increased HIV-associated neurocognitive disorders (HAND) still persist, suggesting that HAART-drugs may play a role in the neurocognitive impairment observed in HIV-infected patients. Given previous data demonstrating that astrocyte senescence plays a role in neurocognitive disorders such as Alzheimer's disease (AD), we examined the role of HAART on markers of senescence in primary cultures of human astrocytes (HAs)...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28895064/a-mouse-model-of-hiv-associated-neurocognitive-disorders-a-brain-behavior-approach-to-discover-disease-mechanisms-and-novel-treatments
#3
REVIEW
William R Tyor, Heather Bimonte-Nelson
HIV-associated neurocognitive disorders (HAND) remain highly prevalent despite combined antiretroviral therapy (cART). Although the most common forms of HAND are mild and identified through neuropsychological testing, there is evidence that with aging these mild forms become more prevalent and may advance to the most severe form of HAND, HIV-associated dementia. Therefore, novel therapies must be developed that can be used adjunctively with cART to prevent deterioration or restore normal cognitive function...
September 11, 2017: Journal of Neurovirology
https://www.readbyqxmd.com/read/28895059/central-nervous-system-penetrating-antiretrovirals-impair-energetic-reserve-in-striatal-nerve-terminals
#4
Kelly L Stauch, Katy Emanuel, Benjamin G Lamberty, Brenda Morsey, Howard S Fox
The use of antiretroviral (ARV) drugs with central nervous system (CNS) penetration effectiveness (CPE) may be useful in the treatment of HIV-associated neurocognitive disorder (HAND) as well as targeting a CNS reservoir in strategies to achieve a functional cure for HIV. However, increased cognitive deficits are linked to at least one of these drugs (efavirenz). As mitochondrial dysfunction has been found with a number of ARVs, and as such can affect neuronal function, the objective of this study was to assess the effects of ARV with high CPE for toxicological profiles on presynaptic nerve terminal energy metabolism...
September 11, 2017: Journal of Neurovirology
https://www.readbyqxmd.com/read/28889255/motor-related-brain-abnormalities-in-hiv-infected-patients-a-multimodal-mri-study
#5
Yawen Zhou, Ruili Li, Xiaoxiao Wang, Hui Miao, Yarui Wei, Rizwan Ali, Bensheng Qiu, Hongjun Li
PURPOSE: It is generally believed that HIV infection could cause HIV-associated neurocognitive disorders (HAND) across a broad range of functional domains. Some of the most common findings are deficits in motor control. However, to date no neuroimaging studies have evaluated basic motor control in HIV-infected patients using a multimodal approach. METHODS: In this study, we utilized high-resolution structural imaging and task-state functional magnetic resonance imaging (fMRI) to assess brain structure and motor function in a homogeneous cohort of HIV-infected patients...
September 9, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28871125/hiv-1-matrix-protein-p17-misfolding-forms-toxic-amyloidogenic-assemblies-that-induce-neurocognitive-disorders
#6
Yasmin Zeinolabediny, Francesca Caccuri, Laura Colombo, Federica Morelli, Margherita Romeo, Alessandro Rossi, Silvia Schiarea, Carlotta Ciaramelli, Cristina Airoldi, Ria Weston, Liu Donghui, Jerzy Krupinski, Rubén Corpas, Elisa García-Lara, Sara Sarroca, Coral Sanfeliu, Mark Slevin, Arnaldo Caruso, Mario Salmona, Luisa Diomede
Human immunodeficiency virus type-1 (HIV-1)-associated neurocognitive disorder (HAND) remains an important neurological manifestation that adversely affects a patient's quality of life. HIV-1 matrix protein p17 (p17) has been detected in autoptic brain tissue of HAND individuals who presented early with severe AIDS encephalopathy. We hypothesised that the ability of p17 to misfold may result in the generation of toxic assemblies in the brain and may be relevant for HAND pathogenesis. A multidisciplinary integrated approach has been applied to determine the ability of p17 to form soluble amyloidogenic assemblies in vitro...
September 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28861811/differential-effects-of-antiretroviral-drugs-on-neurons-in-vitro-roles-for-oxidative-stress-and-integrated-stress-response
#7
Anna L Stern, Rebecca N Lee, Nina Panvelker, Jiean Li, Jenna Harowitz, Kelly L Jordan-Sciutto, Cagla Akay-Espinoza
Mounting evidence suggests that antiretroviral drugs may contribute to the persistence of HIV-associated neurocognitive disorders (HAND), which impact 30%-50% of HIV-infected patients in the post-antiretroviral era. We previously reported that two first generation HIV protease inhibitors, ritonavir and saquinavir, induced oxidative stress, with subsequent neuronal death in vitro, which was reversed by augmentation of the endogenous antioxidant response by monomethyl fumarate. We herein determined whether two newer-generation PIs, darunavir and lopinavir, were deleterious to neurons in vitro...
August 31, 2017: Journal of Neuroimmune Pharmacology: the Official Journal of the Society on NeuroImmune Pharmacology
https://www.readbyqxmd.com/read/28851400/hiv-associated-synaptic-degeneration
#8
REVIEW
Wenjuan Ru, Shao-Jun Tang
Human immunodeficiency virus (HIV) infection induces neuronal injuries, with almost 50% of infected individuals developing HIV-associated neurocognitive disorders (HAND). Although highly activate antiretroviral therapy (HAART) has significantly reduced the incidence of severe dementia, the overall prevalence of HAND remains high. Synaptic degeneration is emerging as one of the most relevant neuropathologies associate with HAND. Previous studies have reported critical roles of viral proteins and inflammatory responses in this pathogenesis...
August 29, 2017: Molecular Brain
https://www.readbyqxmd.com/read/28840088/mechanisms-of-cognitive-aging-in-the-hiv-positive-adult
#9
Asante Kamkwalala, Paul Newhouse
PURPOSE OF REVIEW: As of the year 2016, an estimated 50% of the United States' HIV-Positive population is aged 50 years or older. Due to a combination of increased rates of infection in older adults, and successful anti-retroviral (ART) regimens allowing HIV-positive adults to survive for decades with the disease, we are now faced with a steadily graying HIV-positive population, with only limited knowledge of how the cognitive and physiological effects of aging intersect with those of chronic HIV-infection...
September 2017: Current Behavioral Neuroscience Reports
https://www.readbyqxmd.com/read/28836850/hiv-non-nucleoside-reverse-transcriptase-inhibitor-efavirenz-reduces-neural-stem-cell-proliferation-in-vitro-and-in-vivo
#10
Jingji Jin, Bethany Grimmig, James Izzo, Lecia A M Brown, Charles Hudson, Adam J Smith, Jun Tan, Paula C Bickford, Brian Giunta
The prevalence of HIV-associated neurocognitive disorders (HAND) remains high despite combination antiretroviral therapy (cART). There is evidence that neural stem cells (NSCs) can migrate to sites of brain injury such as those caused by inflammation and oxidative stress, which are pathological features of HAND. Thus, reductions in NSCs may contribute to HAND pathogenesis. Since the HIV non-nucleoside reverse transcriptase inhibitor efavirenz (EFV) has previously been associated with cognitive deficits and promotion of oxidative stress pathways, we examined its effect on NSCs in vitro as well as in C57BL/6J mice...
November 2016: Cell Transplantation
https://www.readbyqxmd.com/read/28820724/neurologic-complications-in-persons-with-hiv-infection-in-the-era-of-antiretroviral-therapy
#11
Dennis Kolson
Neurologic complications in persons with HIV infection are less severe in the era of potent antiretroviral therapy but remain highly prevalent. Prior to the use of antiretroviral therapy, opportunistic infections of the central nervous system (CNS) and CNS malignancy were common. Progressive multifocal leukoencephalopathy (PML), however, remains a diagnostic challenge in HIV-infected individuals, and no effective antiviral treatment for PML is currently available. Primary neurologic complications of acute HIV infection include aseptic meningitis and acute inflammatory demyelinating polyneuropathy...
July 2017: Topics in Antiviral Medicine
https://www.readbyqxmd.com/read/28811349/brain-macrophages-in-simian-immunodeficiency-virus-infected-antiretroviral-suppressed-macaques-a-functional-latent-reservoir
#12
Claudia R Avalos, Celina M Abreu, Suzanne E Queen, Ming Li, Sarah Price, Erin N Shirk, Elizabeth L Engle, Ellen Forsyth, Brandon T Bullock, Feilim Mac Gabhann, Stephen W Wietgrefe, Ashley T Haase, M Christine Zink, Joseph L Mankowski, Janice E Clements, Lucio Gama
A human immunodeficiency virus (HIV) infection cure requires an understanding of the cellular and anatomical sites harboring virus that contribute to viral rebound upon treatment interruption. Despite antiretroviral therapy (ART), HIV-associated neurocognitive disorders (HAND) are reported in HIV-infected individuals on ART. Biomarkers for macrophage activation and neuronal damage in cerebrospinal fluid (CSF) of HIV-infected individuals demonstrate continued effects of HIV in brain and suggest that the central nervous system (CNS) may serve as a viral reservoir...
August 15, 2017: MBio
https://www.readbyqxmd.com/read/28768859/identification-of-emerging-mac-tropic-hiv-1-r5-variants-in-brain-tissue-of-patients-without-severe-neurological-complications
#13
Maria Paz Gonzalez-Perez, Paul J Peters, Olivia O'Connell, Nilsa Silva, Carole Harbison, Sheila Cummings Macri, Saravanan Kaliyaperumal, Katherine Luzuriaga, Paul R Clapham
Untreated HIV-1+ individuals frequently suffer from HIV associated neurocognitive disorders (HAND), with about 30% of AIDS patients suffering severe HIV associated dementias (HAD). Antiretroviral therapy has greatly reduced the incidence of HAND and HAD. However, there is a continuing problem of milder neurocognitive impairments in treated HIV+ patients that may be increasing with long term therapy.Here, we investigated whether envelope (env) genes could be amplified from proviral DNA or RNA derived from brain tissue of 12 individuals with normal neurology or minor neurological conditions (N/MC individuals)...
August 2, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28762184/nef-is-secreted-in-exosomes-from-nef-gfp-expressing-and-hiv-1-infected-human-astrocytes
#14
Pia Pužar Dominkuš, Jana Ferdin, Ana Plemenitaš, Boris Matija Peterlin, Metka Lenassi
HIV-1 infection of the central nervous system causes HIV-associated neurocognitive disorders, even in aviremic patients. Although astrocyte malfunction was associated to these disorders, their implication is overshadowed by contributions of microglia and macrophages. Astrocytes are infected with HIV-1 in vivo and express a relevant amount of viral protein Nef. Nef was shown to stimulate its own release in exosomes from diverse cell types, which in turn have damaging effects on neighboring cells. Using immunoblotting and electron microscopy, we showed that human astrocytes expressing Nef...
July 31, 2017: Journal of Neurovirology
https://www.readbyqxmd.com/read/28759224/n-pivaloyloxy-alkoxy-carbonyl-prodrugs-of-the-glutamine-antagonist-6-diazo-5-oxo-l-norleucine-don-as-a-potential-treatment-for-hiv-associated-neurocognitive-disorders
#15
Michael T Nedelcovych, Lukáš Tenora, Boe-Hyun Kim, Jennifer Kelschenbach, Wei Chao, Eran Hadas, Andrej Jančařík, Eva Prchalová, Sarah C Zimmermann, Ranjeet P Dash, Alexandra J Gadiano, Caroline Garrett, Georg Furtmüller, Byoungchol Oh, Gerald Brandacher, Jesse Alt, Pavel Majer, David J Volsky, Rana Rais, Barbara S Slusher
Aberrant excitatory neurotransmission associated with overproduction of glutamate has been implicated in the development of HIV-associated neurocognitive disorders (HAND). The glutamine antagonist 6-diazo-5-oxo-l-norleucine (DON, 14) attenuates glutamate synthesis in HIV-infected microglia/macrophages, offering therapeutic potential for HAND. We show that 14 prevents manifestation of spatial memory deficits in chimeric EcoHIV-infected mice, a model of HAND. 14 is not clinically available, however, because its development was hampered by peripheral toxicities...
August 14, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28758167/joint-data-harmonization-and-group-cardinality-constrained-classification
#16
Yong Zhang, Sang Hyun Park, Kilian M Pohl
To boost the power of classifiers, studies often increase the size of existing samples through the addition of independently collected data sets. Doing so requires harmonizing the data for demographic and acquisition differences based on a control cohort before performing disease specific classification. The initial harmonization often mitigates group differences negatively impacting classification accuracy. To preserve cohort separation, we propose the first model unifying linear regression for data harmonization with a logistic regression for disease classification...
October 2016: Medical Image Computing and Computer-assisted Intervention: MICCAI ..
https://www.readbyqxmd.com/read/28754798/frontline-science-cxcr7-mediates-cd14-cd16-monocyte-transmigration-across-the-blood-brain-barrier-a-potential-therapeutic-target-for-neuroaids
#17
Mike Veenstra, Dionna W Williams, Tina M Calderon, Kathryn Anastos, Susan Morgello, Joan W Berman
CD14(+)CD16(+) monocytes transmigrate into the CNS of HIV-positive people in response to chemokines elevated in the brains of infected individuals, including CXCL12. Entry of these cells leads to viral reservoirs, neuroinflammation, and neuronal damage. These may eventually lead to HIV-associated neurocognitive disorders. Although antiretroviral therapy (ART) has significantly improved the lives of HIV-infected people, the prevalence of cognitive deficits remains unchanged despite ART, still affecting >50% of infected individuals...
July 28, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28753395/neurocognitive-impairment-in-a-chronically-well-suppressed-hiv-infected-population-the-dutch-trevi-cohort-study
#18
Lennert W J van den Dries, Marlies N Wagener, Lize C Jiskoot, Merel Visser, Kevin R Robertson, Kirsten S Adriani, Eric C M van Gorp
We assessed the value of screening for cognitive abnormalities in a chronically infected HIV population (N = 388) and investigated the association with clinical correlates. The mean age was 48 years (±11), the majority of the patients were male (89%), the median duration of infection was 6 years [interquartile range (IQR) = 2-12], the median CD count was 600 (IQR = 450-780), and 326 (84%) had a viral load below 200 copies/mL. Screening for cognitive complaints was applied using the three Simioni questions and the international HIV dementia scale (iHDS)...
August 2017: AIDS Patient Care and STDs
https://www.readbyqxmd.com/read/28752495/changing-clinical-phenotypes-of-hiv-associated-neurocognitive-disorders
#19
Ned Sacktor
HIV-associated neurocognitive disorder (HAND) remains a common cause of cognitive impairment and persists in 15-55% of HIV+ individuals in the combination antiretroviral therapy (CART) era. CART is now the primary treatment for HAND, but it is effective in only a subset of patients. In the pre-CART era, HIV-associated dementia was the most common form of HAND. However, in CART-treated patients, the prevalence of HIV-associated dementia has declined substantially, and milder stages of HAND, i.e., ANI and MND predominate...
July 27, 2017: Journal of Neurovirology
https://www.readbyqxmd.com/read/28742398/construct-validity-of-the-ucsd-performance-based-skills-assessment-brief-version-upsa-b-in-hiv-disease
#20
David P Sheppard, Steven Paul Woods, Marizela Verduzco
Among individuals living with HIV disease, approximately 60% experience problems with everyday functioning. The present study investigated the utility of the UCSD Performance-based Skills Assessment-Brief Version (UPSA-B) as a measure of functional capacity in HIV. We utilized a cross-sectional three-group design comparing individuals with HIV- associated neurocognitive disorder (HAND) (HIV + HAND+; n = 27), HIV+ neurocognitively normal individuals (HIV + HAND-; n = 51), and an HIV- comparison group (HIV-; n = 28) with broadly comparable demographics and non-HIV comorbidities...
July 25, 2017: Applied Neuropsychology. Adult
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