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https://www.readbyqxmd.com/read/28936074/syndromes-of-rapidly-progressive-cognitive-decline-our-experience
#1
Sadanandavalli Retnaswami Chandra, Lakshminarayanapuram Gopal Viswanathan, Anupama Ramakanth Pai, Rahul Wahatule, Suvarna Alladi
BACKGROUND: Dementias are fairly slowly progressive degenerative diseases of brain for which treatment options are very less and carry a lot of burden on family and society. A small percentage of them are rapidly progressive and mostly carry a different course outcome. However, there are no definite criteria other than the time line for these patients. AIMS: The aim of this was to identify and categorize the causes and course of rapidly progressive dementias seen in our center...
August 2017: Journal of Neurosciences in Rural Practice
https://www.readbyqxmd.com/read/28934415/first-report-of-urease-activity-in-the-novel-systemic-fungal-pathogen-emergomyces-africanus-a-comparison-with-the-neurotrope-cryptococcus-neoformans
#2
Barbra Lerm, Chris Kenyon, Ilan S Schwartz, Heinrich Kroukamp, Riaan de Witt, Nelesh P Govender, G Sybren de Hoog, Alfred Botha
Cryptococcus neoformans is an opportunistic pathogen responsible for the AIDS-defining illness, cryptococcal meningitis. During the disease process, entry of cryptococcal cells into the brain is facilitated by virulence factors that include urease enzyme activity. A novel species of an Emmonsia-like fungus, recently named Emergomyces africanus, was identified as a cause of disseminated mycosis in HIV-infected persons in South Africa. However, in contrast to C. neoformans, the enzymes produced by this fungus, some of which may be involved in pathogenesis, have not been described...
November 1, 2017: FEMS Yeast Research
https://www.readbyqxmd.com/read/28934108/markers-of-microbial-translocation-and-immune-activation-predict-cognitive-processing-speed-in-heavy-drinking-men-living-with-hiv
#3
Mollie A Monnig, Christopher W Kahler, Patricia A Cioe, Peter M Monti, Kenneth H Mayer, David W Pantalone, Ronald A Cohen, Bharat Ramratnam
HIV infection and alcohol use disorder are associated with deficits in neurocognitive function. Emerging evidence points to pro-inflammatory perturbations of the gut-brain axis as potentially contributing to neurocognitive impairment in the context of HIV and chronic heavy alcohol use. This study examined whether plasma markers of microbial translocation (LPS) from the gastrointestinal tract and related immune activation (sCD14, EndoCAb) were associated with neurocognition in 21 men living with HIV who were virally suppressed on antiretroviral therapy...
September 21, 2017: Microorganisms
https://www.readbyqxmd.com/read/28913726/diagnosis-and-treatment-of-progressive-multifocal-leukoencephalopathy-associated-with-multiple-sclerosis-therapies
#4
REVIEW
Eric M L Williamson, Joseph R Berger
Progressive multifocal leukoencephalopathy (PML) is a rare, but serious, complication encountered in patients treated with a select number of disease-modifying therapies (DMTs) utilized in treating multiple sclerosis (MS). PML results from a viral infection in the brain for which the only demonstrated effective therapy is restoring the perturbed immune system-typically achieved in the patient with MS by removing the offending therapeutic agent or, in the case of HIV-associated PML, treatment with highly active antiretroviral therapies...
September 14, 2017: Neurotherapeutics: the Journal of the American Society for Experimental NeuroTherapeutics
https://www.readbyqxmd.com/read/28899450/joining-forces-to-prevent-dementia-the-international-research-network-on-dementia-prevention-irndp
#5
Kaarin J Anstey, Ruth Peters, Linda Clare, Nicola T Lautenschlager, Hiroko H Dodge, Deborah E Barnes, Suzana Shahar, Henry Brodaty, Glenn Rees
Dementia is a neurodegenerative disorder with global impact, with the largest proportion of cases occurring in low- and middle-income countries. It is estimated that there are 46.8 million cases globally with approximately 10 million new cases each year or a new case occurring every 3 sec (Prince et al., 2015). For comparison there are 36.7 million HIV cases with an estimated 2 million new cases each year (WHO, 2017). The rise in dementia prevalence is largely due to population ageing, with the oldest being at highest risk...
September 13, 2017: International Psychogeriatrics
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
#6
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/28893794/effects-of-hiv-1-tat-and-methamphetamine-on-blood-brain-barrier-integrity-and-function-in-vitro
#7
Sulay Patel, Crystal R Leibrand, Preetha Palasuberniam, Pierre-Olivier Couraud, Babette Weksler, Fay M Jahr, Joseph L McClay, Kurt F Hauser, MaryPeace McRae
Human immunodeficiency (HIV) infection results in neurocognitive deficits in about one half of infected individuals. Despite systemic effectiveness, restricted antiretroviral penetration across the blood-brain barrier (BBB) is a major limitation in fighting CNS-localized infection. Drug abuse exacerbates HIV-induced cognitive and pathologic CNS changes. This study's purpose was to investigate the effects of the HIV-1 protein, Tat, and methamphetamine on factors affecting drug penetration across an in vitro BBB model...
September 11, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28889255/motor-related-brain-abnormalities-in-hiv-infected-patients-a-multimodal-mri-study
#8
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/28886986/role-of-connexin-and-pannexin-containing-channels-in-hiv-infection-and-neuroaids
#9
REVIEW
Shaily Malik, Eliseo A Eugenin
Neuron-Glia crosstalk is essential for efficient synaptic communication, cell growth and differentiation, neuronal activity, neurotransmitter recycling, and brain immune response. The master regulators of this neuron-glia communication are connexin containing Gap Junctions (GJs) and Hemichannels (HCs) as well as pannexin HCs. However, the role of these channels under pathological conditions, especially in infectious diseases is still in exploratory stages. Human Immunodeficiency Virus-1 (HIV) is one such infectious agent that takes advantage of the host intercellular communication systems, GJs and HCs, to exacerbate viral pathogenesis in the brain in spite of the antiretroviral therapy effectively controlling viral replication in the periphery...
September 5, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28886715/peroxisome-proliferator-activated-receptor-gamma-potential-molecular-therapeutic-target-for-hiv-1-associated-brain-inflammation
#10
Amila Omeragic, Md Tozammel Hoque, U-Yeong Choi, Reina Bendayan
BACKGROUND: Despite the use of combination antiretroviral therapy for the treatment of HIV-1 infection, cognitive impairments remain prevalent due to persistent viral replication and associated brain inflammation. Primary cellular targets of HIV-1 in the brain are macrophages, microglia, and to a certain extent astrocytes which in response to infection release inflammatory markers, viral proteins [i.e., glycoprotein 120 (gp120)] and exhibit impaired glutamate uptake. Peroxisome proliferator-activated receptors (PPARs) are members of the nuclear receptor superfamily of ligand-activated transcription factors...
September 8, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/28884751/tuberculous-meningitis
#11
REVIEW
Robert J Wilkinson, Ursula Rohlwink, Usha Kant Misra, Reinout van Crevel, Nguyen Thi Hoang Mai, Kelly E Dooley, Maxine Caws, Anthony Figaji, Rada Savic, Regan Solomons, Guy E Thwaites
Tuberculosis remains a global health problem, with an estimated 10.4 million cases and 1.8 million deaths resulting from the disease in 2015. The most lethal and disabling form of tuberculosis is tuberculous meningitis (TBM), for which more than 100,000 new cases are estimated to occur per year. In patients who are co-infected with HIV-1, TBM has a mortality approaching 50%. Study of TBM pathogenesis is hampered by a lack of experimental models that recapitulate all the features of the human disease. Diagnosis of TBM is often delayed by the insensitive and lengthy culture technique required for disease confirmation...
September 8, 2017: Nature Reviews. Neurology
https://www.readbyqxmd.com/read/28879898/progressive-multifocal-leukoencephalopathy-in-a-44-year-old-male-with-idiopathic-cd4-t-lymphocytopenia-treated-with-mirtazapine-and-mefloquine
#12
Aruna Nambirajan, Vaishali Suri, Vijay Kataria, Mehar C Sharma, Vinay Goyal
Progressive multifocal leukoencephalopathy (PML) is an opportunistic viral infection of the central nervous system caused by the reactivation of John Cunningham virus (JCV) in immunocompromised patients, most commonly in human immunodeficiency virus (HIV) infection, and less commonly in those receiving various immunosuppressive regimens. Prognosis of untreated PML is grave and the mainstay of treatment is the reversal of immunosuppression, usually by institution of antiretroviral drugs in HIV patients and cessation of immunosuppressive therapies in others...
September 2017: Neurology India
https://www.readbyqxmd.com/read/28871125/hiv-1-matrix-protein-p17-misfolding-forms-toxic-amyloidogenic-assemblies-that-induce-neurocognitive-disorders
#13
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/28866957/nanocarriers-for-brain-specific-delivery-of-anti-retro-viral-drugs-challenges-and-achievements
#14
Nila Mary Varghese, Senthil Venkatachalam, Shailendra K Saxena
HIV/AIDS is a global pandemic and the deleterious effects of Human Immunodeficiency Virus in the brain cannot be overlooked. Though the current Anti-Retro Viral therapy is able to reduce the virus load in the peripheral tissues of the body, the inability of the anti-retro viral drugs to cross the Blood Brain Barrier, as such, limits its therapeutic effect in the brain. The development of newer, successful nanoparticulate drug delivery systems to enhance the feasibility of the anti-retro viral drugs to the brain, offers a novel strategy to treat the AIDS related neuronal degradation...
September 4, 2017: Journal of Drug Targeting
https://www.readbyqxmd.com/read/28866752/altered-associations-between-pain-symptoms-and-brain-morphometry-in-the-pain-matrix-of-hiv-seropositive-individuals
#15
Deborrah Castillo, Thomas Ernst, Eric Cunningham, Linda Chang
Pain remains highly prevalent in HIV-seropositive (HIV+) patients despite their well-suppressed viremia with combined antiretroviral therapy. Investigating brain abnormalities within the pain matrix, and in relation to pain symptoms, in HIV+ participants may provide objective biomarkers and insights regarding their pain symptoms. We used Patient-Reported Outcome Measurement Information System (PROMIS®) pain questionnaire to evaluate pain symptoms (pain intensity, pain interference and pain behavior), and structural MRI to assess brain morphometry using FreeSurfer (cortical area, cortical thickness and subcortical volumes were evaluated in 12 regions within the pain matrix)...
September 2, 2017: Journal of Neuroimmune Pharmacology: the Official Journal of the Society on NeuroImmune Pharmacology
https://www.readbyqxmd.com/read/28859023/isolated-third-cranial-nerve-palsy-leading-to-the-diagnosis-of-disseminated-burkitt-lymphoma-a-case-report-and-literature-review
#16
Arens Taga, Marco Russo, Irene Florindo, Giovanni Pavesi
INTRODUCTION: Dysfunction of the third cranial nerve can result from lesions anywhere along its course between the midbrain and the orbit. Lymphoma is a rare cause of isolated oculomotor nerve palsy (OMP), with only 19 cases reported in the literature. We describe a case of an isolated OMP leading to the diagnosis of disseminated Burkitt lymphoma (BL). CASE REPORT: A 37-year-old man presented with acute onset diplopia and right ptosis and was found to have a right pupillary sparing OMP...
September 2017: Neurologist
https://www.readbyqxmd.com/read/28852071/sonic-hedgehog-mimetic-prevents-leukocyte-infiltration-into-the-cns-during-acute-hiv-infection
#17
Vir B Singh, Meera V Singh, Dorota Piekna-Przybylska, Santhi Gorantla, Larisa Y Poluektova, Sanjay B Maggirwar
Infiltration of infected leukocytes culminates in establishment of a brain niche for Human Immunodeficiency Virus (HIV) during acute phase of infection, initiating an ongoing cascade of persistent viral replication and inflammation, that causes irreversible neuronal injury and HIV associated neurocognitive disease (HAND). In this study, humanized mice were treated with Smoothened Agonist (SAG), a Sonic Hedgehog (Shh) mimetic in order to fortify blood brain barrier (BBB) and dampen leukocyte extravasation into CNS during AHI...
August 29, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28841647/probing-the-compartmentalization-of-hiv-1-in-the-central-nervous-system-through-its-neutralization-properties
#18
Karl Stefic, Antoine Chaillon, Mélanie Bouvin-Pley, Alain Moreau, Martine Braibant, Frédéric Bastides, Guillaume Gras, Louis Bernard, Francis Barin
Compartmentalization of HIV-1 has been observed in the cerebrospinal fluid (CSF) of patients at different clinical stages. Considering the low permeability of the blood-brain barrier, we wondered if a reduced selective pressure by neutralizing antibodies (NAb) in the central nervous system (CNS) could favor the evolution of NAb-sensitive viruses in this compartment. Single genome amplification (SGA) was used to sequence full-length HIV-1 envelope variants (453 sequences) from paired CSF and blood plasma samples in 9 subjects infected by HIV variants of various clades and suffering from diverse neurologic disorders...
2017: PloS One
https://www.readbyqxmd.com/read/28840088/mechanisms-of-cognitive-aging-in-the-hiv-positive-adult
#19
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
#20
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
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