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https://www.readbyqxmd.com/read/28628526/determinants-of-hiv-1-cd4-independent-brain-adaptation
#1
Madina Shakirzyanova, Xiang-Peng Kong, Cecilia Cheng-Mayer
BACKGROUND: HIV-1 is known to adapt to the local environment in its usage of receptors and it can become CD4 independent in the brain where the receptor is scarce. This adaptation is through amino acid variations, but the patterns of such variation are not yet well understood. Given that infection of long-lived CD4-low and CD4-negative cells in anatomic compartments such as the brain expand cell tropism in vivo and may serve as potential viral reservoirs that pose challenge for HIV eradication, understanding the evolution to CD4-independence and envelope conformation associated with infection in the absence of CD4 will not only broaden our insights into HIV pathogenesis, but may guide functional cure strategies as well...
June 15, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/28626255/underlying-cause-of-death-recorded-during-2013-to-2015-at-a-tertiary-general-hospital-in-vientiane-capital-lao-pdr
#2
Bounfeng Phoummalaysith, Viengsakhone Louangpradith, Tavanh Manivon, Bounxou Keohavong, Eiko Yamamoto, Nobuyuki Hamajima
In Lao People's Democratic Republic (Lao PDR), the cause of death is not registered in death reports. As a result, the government cannot produce official reports that show mortality according to cause of death. This study aimed to report the underlying cause of death in a tertiary general hospital (Mittaphab Hospital) in Vientiane capital. Mittaphab hospital is a governmental teaching hospital with 300 beds for inpatient services specialized in orthopedics, neurology, and hemodialysis. Since a children hospital exists beside Mittaphab Hospital, severe pediatric cases are referred to the child hospital...
February 2017: Nagoya Journal of Medical Science
https://www.readbyqxmd.com/read/28620498/diabetes-insipidus-and-hypopituitarism-in-hiv-an-unexpected-cause
#3
Carlos Tavares Bello, Francisco Sousa Santos, João Sequeira Duarte, Carlos Vasconcelos
Central diabetes insipidus (DI) is a rare clinical entity characterized by low circulating levels of antidiuretic hormone (ADH) presenting with polyuria and volume depletion. Pituitary surgery is the most common cause of central DI in adults. Pituitary and hypothalamic disease, particularly invasive neoplasms, rarely cause DI, being idiopathic cases responsible for the majority of non-surgical cases. HIV patients, especially those with poor virulogical control, are prone to the development of CNS neoplasms, particularly lymphomas...
2017: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/28612507/hiv-and-drug-abuse-mediate-astrocyte-senescence-in-a-%C3%AE-catenin-dependent-manner-leading-to-neuronal-toxicity
#4
Chunjiang Yu, Srinivas D Narasipura, Maureen H Richards, Xiu-Ti Hu, Bryan Yamamoto, Lena Al-Harthi
Emerging evidence suggests that cell senescence plays an important role in aging-associated diseases including neurodegenerative diseases. HIV leads to a spectrum of neurologic diseases collectively termed HIV-associated neurocognitive disorders (HAND). Drug abuse, particularly methamphetamine (meth), is a frequently abused psychostimulant among HIV+ individuals and its abuse exacerbates HAND. The mechanism by which HIV and meth lead to brain cell dysregulation is not entirely clear. In this study, we evaluated the impact of HIV and meth on astrocyte senescence using in vitro and several animal models...
June 13, 2017: Aging Cell
https://www.readbyqxmd.com/read/28606402/clinical-histological-and-radiological-responses-to-methylprednisolone-in-hiv-associated-rod-myopathy
#5
André M S Silva, Rodrigo H Mendonça, Cristiane A M Moreno, Eduardo P Estephan, Paulo V P Helito, Mary S Carvalho, Edmar Zanoteli
Skeletal muscle involvement as a neurologic manifestation in individuals with HIV is rare, especially as rod myopathy. We describe a 41-year-old male with HIV infection who presented progressive proximal muscle weakness and limb-girdle atrophy. A muscle magnetic resonance image showed bilateral fatty infiltration and post-contrast enhancement in the arm and thigh muscles. The muscle biopsy revealed intracytoplasmic aggregates with appearance of nemaline rod bodies with Gomori trichrome staining and electron microscopy in most fibers...
May 12, 2017: Neuromuscular Disorders: NMD
https://www.readbyqxmd.com/read/28598791/croi-2017-neurologic-complications-of-hiv-infection
#6
Serena S Spudich, Beau M Ances
The brain is a major target for HIV infection and is a potential viral reservoir even in virologically well-controlled HIV-infected individuals. Data presented at the 2017 Conference on Retroviruses and Opportunistic Infections (CROI) suggested that during early HIV infection, CD4+ T cells in the meninges and choroid plexus serve as an important early site of HIV infection in the central nervous system (CNS), with brain macrophages and microglial cells becoming an important source of viral replication with advancing disease...
May 2017: Topics in Antiviral Medicine
https://www.readbyqxmd.com/read/28598205/neurofilament-light-chain-protein-as-a-marker-of-neuronal-injury-review-of-its-use-in-hiv-1-infection-and-reference-values-for-hiv-negative-controls
#7
Aylin Yilmaz, Kaj Blennow, Lars Hagberg, Staffan Nilsson, Richard W Price, Judith Schouten, Serena Spudich, Jonathan Underwood, Henrik Zetterberg, Magnus Gisslén
Several CSF biomarkers of neuronal injury have been studied in people living with HIV. At this time, the most useful is the light subunit of the neurofilament protein (NFL). This major structural component of myelinated axons is essential to maintain axonal caliber and to facilitate effective nerve conduction. CSF concentrations of NFL provide a sensitive marker of CNS injury in a number of neurological diseases, including HIV-related neuronal injury. Areas Covered: In this review, the authors describe CSF NFL concentrations across the spectrum of HIV-infection, from its early acute phase to severe immunosuppression, with and without neurological conditions, and with and without antiretroviral treatment (n = 516)...
June 14, 2017: Expert Review of Molecular Diagnostics
https://www.readbyqxmd.com/read/28596187/functional-connectivity-in-virally-suppressed-patients-with-hiv-associated-neurocognitive-disorder-a-resting-state-analysis
#8
J R Chaganti, A Heinecke, T M Gates, K J Moffat, B J Brew
BACKGROUND AND PURPOSE: HIV-associated neurocognitive disorder still occurs despite virally suppressive combination antiretroviral therapy. In the pre-combination antiretroviral era and in patients without HIV suppression, HIV-associated neurocognitive disorder was caused by synaptodendritic injury resulting in impairment of neural networks, characterized by decreased attention, psychomotor slowing, and working memory deficits. Whether similar pathogenesis is true for HIV-associated neurocognitive disorder in the context of viral suppression is not clear...
June 8, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28594894/micrornas-upregulated-during-hiv-infection-target-peroxisome-biogenesis-factors-implications-for-virus-biology-disease-mechanisms-and-neuropathology
#9
Zaikun Xu, Eugene L Asahchop, William G Branton, Benjamin B Gelman, Christopher Power, Tom C Hobman
HIV-associated neurocognitive disorders (HAND) represent a spectrum neurological syndrome that affects up to 25% of patients with HIV/AIDS. Multiple pathogenic mechanisms contribute to the development of HAND symptoms including chronic neuroinflammation and neurodegeneration. Among the factors linked to development of HAND is altered expression of host cell microRNAs (miRNAs) in brain. Here, we examined brain miRNA profiles among HIV/AIDS patients with and without HAND. Our analyses revealed differential expression of 17 miRNAs in brain tissue from HAND patients...
June 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28588577/immune-reconstitution-inflammatory-syndrome-unmasking-or-worsening-aids-related-progressive-multifocal-leukoencephalopathy-a-literature-review
#10
REVIEW
Anna Fournier, Guillaume Martin-Blondel, Emmanuèle Lechapt-Zalcman, Julia Dina, Apolline Kazemi, Renaud Verdon, Emmanuel Mortier, Arnaud de La Blanchardière
Incidence of progressive multifocal leukoencephalopathy (PML) in HIV-infected patients has declined in the combined antiretroviral therapy (cART) era although a growing number of acquired immunodeficiency syndrome (AIDS)-related PML-immune reconstitution inflammatory syndromes (PML-IRIS) have been published during the same period. Therapeutic management of PML-IRIS is not consensual and mainly relies on corticosteroids. Our main aim was, in addition to provide a thoughtful analysis of published PML-IRIS cases, to assess the benefit of corticosteroids in the management of PML-IRIS, focusing on confirmed cases...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28579301/incidence-presentation-and-outcome-of%C3%A2-toxoplasmosis-in-hiv-infected-in-the-combination-antiretroviral-therapy-era
#11
Raquel Martin-Iguacel, Magnus Glindvad Ahlström, Madeleine Touma, Frederik Neess Engsig, Nina Breinholt Stærke, Mette Stærkind, Niels Obel, Line D Rasmussen
BACKGROUND: HIV-associated incidence and prognosis of cerebral toxoplasmosis (CTX) is not well established during later years. METHODS: From the Danish HIV Cohort Study, we identified 6325 HIV-infected individuals. We assessed incidence, mortality, predictive and prognostic factors of CTX during the pre-combination antiretroviral therapy (pre-cART; 1995-1996) and cART-era (1997-2014). Adjusted incidence rate ratios (aIRR), mortality rate ratios (aMRR) and 95% confidence intervals (CI) were assessed using Poisson regression analysis...
June 1, 2017: Journal of Infection
https://www.readbyqxmd.com/read/28578421/aetiology-and-outcomes-of-suspected-infections-of-the-central-nervous-system-in-children-in-mbarara-uganda
#12
Anne-Laure Page, Yap Boum Ii, Elizabeth Kemigisha, Nicolas Salez, Deborah Nanjebe, Céline Langendorf, Said Aberrane, Dan Nyehangane, Fabienne Nackers, Emmanuel Baron, Rémi Charrel, Juliet Mwanga-Amumpaire
Infections of the central nervous system (CNS) are severe conditions, leading to neurological sequelae or death. Knowledge of the causative agents is essential to develop guidelines for case management in resource-limited settings. Between August 2009 and October 2012, we conducted a prospective descriptive study of the aetiology of suspected CNS infections in children two months to 12 years old, with fever and at least one sign of CNS involvement in Mbarara Hospital, Uganda. Children were clinically evaluated on admission and discharge, and followed-up for 6 months for neurological sequelae...
June 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28560631/genetics-of-hiv-associated-sensory-neuropathy-and-related-pain-in-africans
#13
REVIEW
Huguette Gaelle Ngassa Mbenda, Antonia Wadley, Zane Lombard, Catherine Cherry, Patricia Price, Peter Kamerman
Despite the use of safer antiretroviral medications, the rate of HIV-associated sensory neuropathy (HIV-SN), the most common neurological complication of HIV, remains high. This condition is often painful and has a negative effect on quality of life. Up to 90% of those with HIV-SN experience pain for which there is no effective analgesic treatment. Genetic factors are implicated, but there is a lack of a comprehensive body of research for African populations. This knowledge gap is even more pertinent as Africans are most affected by HIV...
May 30, 2017: Journal of Neurovirology
https://www.readbyqxmd.com/read/28532388/erratum-to-novel-predictors-of-neurosyphilis-among-hiv-negative-syphilis-patients-with-neurological-symptoms-an-observational-study
#14
Yao Xiao, Man-Li Tong, Li-Li Liu, Li-Rong Lin, Mei-Jun Chen, Hui-Lin Zhang, Wei-Hong Zheng, Shu-Lian Li, Hui-Ling Lin, Zhi-Feng Lin, Hui-Qin Xing, Jian-Jun Niu, Tian-Ci Yang
No abstract text is available yet for this article.
May 22, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28520614/incidence-of-neurological-disorders-among-hiv-infected-individuals-with-universal-health-care-in-taiwan-2000-through-2010
#15
Yi-Tseng Tsai, Yen-Chin Chen, Chen-Yang Hsieh, Wen-Chien Ko, Nai-Ying Ko
OBJECTIVE: To determine the incidence of and factors associated with neurological disorders in a large Taiwanese cohort of HIV-infected persons with free access to highly active antiretroviral therapy (HAART). DESIGN: A retrospective population-based cohort study was conducted using the National Health Insurance Research Database for the years 2000-2010. METHODS: We identified 13,316 HIV-positive persons from 2000 through 2010. We used direct standardization to calculate age- and sex-adjusted incidence rates based on the 2000 World Health Organization world standard population...
May 17, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/28512685/modeling-brain-lentiviral-infections-during-antiretroviral-therapy-in-aids
#16
Weston C Roda, Michael Y Li, Michael S Akinwumi, Eugene L Asahchop, Benjamin B Gelman, Kenneth W Witwer, Christopher Power
Understanding HIV-1 replication and latency in different reservoirs is an ongoing challenge in the care of patients with HIV/AIDS. A mathematical model was created to describe and predict the viral dynamics of HIV-1 and SIV infection within the brain during effective combination antiretroviral therapy (cART). The mathematical model was formulated based on the biology of lentiviral infection of brain macrophages and used to describe the dynamics of transmission and progression of lentiviral infection in brain...
May 16, 2017: Journal of Neurovirology
https://www.readbyqxmd.com/read/28487203/mmps-timps-imbalances-in-the-peripheral-blood-and-cerebrospinal-fluid-are-associated-with-the-pathogenesis-of-hiv-1-associated-neurocognitive-disorders-a-pilot-study
#17
Yanyan Xing, Nicole Shepherd, Jie Lan, Wei Li, Sushmita Rane, Samir K Gupta, Shanxiang Zhang, Jun Dong, Qigui Yu
HIV-1-associated neurocognitive disorders (HAND) continue to be a major concern in the infected population, despite the widespread use of combined antiretroviral therapy (cART). Growing evidence suggests that an imbalance between matrix metalloproteinases (MMPs) and endogenous tissue inhibitors of MMPs (TIMPs) contributes to the pathogenesis of HAND. In our present study, we examined protein levels and enzymatic activities of MMPs and TIMPs in both plasma and cerebrospinal fluid (CSF) samples from HIV-1 patients with or without HAND and HIV-1-negative controls...
May 6, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/28472307/antiretroviral-treated-hiv-1-patients-can-harbour-resistant-viruses-in-csf-despite-an-undetectable-viral-load-in-plasma
#18
Cathia Soulie, Maxime Grudé, Diane Descamps, Corinne Amiel, Laurence Morand-Joubert, Stéphanie Raymond, Coralie Pallier, Pantxika Bellecave, Sandrine Reigadas, Mary-Anne Trabaud, Constance Delaugerre, Brigitte Montes, Francis Barin, Virginie Ferré, Hélène Jeulin, Chakib Alloui, Sabine Yerly, Anne Signori-Schmuck, Aurélie Guigon, Samira Fafi-Kremer, Stéphanie Haïm-Boukobza, Audrey Mirand, Anne Maillard, Sophie Vallet, Catherine Roussel, Lambert Assoumou, Vincent Calvez, Philippe Flandre, Anne-Geneviève Marcelin
Background: HIV therapy reduces the CSF HIV RNA viral load (VL) and prevents disorders related to HIV encephalitis. However, these brain disorders may persist in some cases. A large population of antiretroviral-treated patients who had a VL > 1.7 log 10 copies/mL in CSF with detectable or undetectable VL in plasma associated with cognitive impairment was studied, in order to characterize discriminatory factors of these two patient populations. Methods: Blood and CSF samples were collected at the time of neurological disorders for 227 patients in 22 centres in France and 1 centre in Switzerland...
May 2, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28462542/clinical-profile-and-outcome-of-progressive-multifocal-leukoencephalopathy-in-hiv-infected-indian-patients
#19
Vipul Shah, Harsh Toshniwal, Manoj Shevkani
BACKGROUND AND OBJECTIVE: Progressive multifocal leukoencephalopathy (PML) is a fatal demyelinating disease of the Central nervous system (CNS) caused by the human polyoma virus JC (JCV). Human Immunodeficiency Virus (HIV) infection predisposes to PML. Very sparse data is available regarding the effect of Highly Active Anti Retroviral Therapy (HAART) on clinical outcome of PML in Indian settings. This study was carried out to look into clinical profile, survival and neurological outcome of HIV infected PML patients in HAART era...
March 2017: Journal of the Association of Physicians of India
https://www.readbyqxmd.com/read/28462218/syndrome-of-transient-headache-and-neurologic-deficits-with-cerebrospinal-fluid-lymphocytosis-masquerading-as-meningitis-in-hiv-patient
#20
Moayad Al Hadidi, William D Meng, Khalid Jumean, Amer Hawatmeh
Syndrome of transient headache and neurologic deficits with cerebrospinal fluid lymphocytosis (HaNDL syndrome) is described as "headache attributed to noninfectious inflammatory disease" featuring, as its name suggests, headache that mimics migraine in addition to neurologic symptoms such as hemiparesis, hemiparesthesia and dysphagia. We report a case of a 50-year-old African-American female who presented with headache, malaise and subsequent hemiparesis. Despite bearing a close resemblance to an acute episode of meningitis clinically, cerebrospinal fluid (CSF) analysis of the patient was only positive for isolated elevation in white cell count...
March 2017: Annals of Translational Medicine
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