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https://www.readbyqxmd.com/read/28502942/brain-biopsy-is-more-reliable-than-the-dna-test-for-jc-virus-in-cerebrospinal-fluid-for-the-diagnosis-of-progressive-multifocal-leukoencephalopathy
#1
Junji Ikeda, Akira Matsushima, Wataru Ishii, Tetuya Goto, Kenta Takahashi, Kazuo Nakamichi, Masayuki Saijo, Yoshiki Sekijima, Shu-Ichi Ikeda
The current standard diagnostic approach for progressive multifocal leukoencephalopathy (PML) is to perform a DNA test to identify the presence of the JC virus in cerebrospinal fluid (CSF). A 32-year-old woman with a 5-year history of systemic lupus erythematosus developed right hemiplegia and motor aphasia. MRI revealed a large white matter lesion in the left frontal lobe. JC virus DNA was undetectable in the CSF, but a brain biopsy showed typical histopathology and a high DNA load of the JC virus. The patient was treated with mefloquine and mirtazapine, and is currently alive at 24 months after onset...
2017: Internal Medicine
https://www.readbyqxmd.com/read/28502940/pet-imaging-of-18-f-fdg-11-c-methionine-11-c-flumazenil-and-11-c-4dst-in-progressive-multifocal-leukoencephalopathy
#2
Kenji Ishibashi, Yoshiharu Miura, Ken Matsumura, Yusuke Kanemasa, Kazuo Nakamichi, Masayuki Saijo, Jun Toyohara, Kenji Ishii
The use of positron emission tomography (PET) imaging in progressive multifocal leukoencephalopathy (PML) has rarely been reported. We herein report a set of PET images in a 63-year-old patient with PML. In PML lesions, the uptake of (18)F-fluorodeoxyglucose, (11)C-methionine, (11)C-flumazenil, and [methyl-(11)C]4'-thiothymidine was decreased, increased, decreased, and unchanged, respectively. These results suggest that glucose metabolism decreased, protein synthesis increased, neuronal integrity decreased, and the DNA synthesis and cellular proliferation of host cells were not activated in PML lesions...
2017: Internal Medicine
https://www.readbyqxmd.com/read/28493815/the-biology-of-jc-polyomavirus
#3
Benedetta Assetta, Walter J Atwood
JC polyomavirus (JCPyV) is the causative agent of a fatal central nervous system demyelinating disease known as progressive multifocal leukoencephalopathy (PML). PML occurs in people with underlying immunodeficiency or in individuals being treated with potent immunomodulatory therapies. JCPyV is a DNA tumor virus with a double stranded DNA genome and encodes a well-studied oncogene, large T antigen. Its host range is highly restricted to humans and only a few cell types support lytic infection in vivo or in vitro...
May 10, 2017: Biological Chemistry
https://www.readbyqxmd.com/read/28473916/progressive-multifocal-leukoencephalopathy-after-heart-transplantation-4-years-of-clinically-stable-infection-on-low-dose-immunosuppressive-therapy
#4
Per Sundbom, Laila Hubbert, Lena Serrander
Progressive multifocal leukoencephalopathy (PML), caused by reactivation of JC-virus is a relatively rare complication seen in patients with compromised immune system. There are no evidence-based treatment available and prognosis is poor. Withdrawal of immunosuppressant can result in further neurological deterioration and for patients with solid organ transplantations, fatal graft rejection. We report a 52-year-old women that presented with seizures within 1 month after heart transplantation. Initial diagnosis was vascular disease...
February 2017: Oxford Medical Case Reports
https://www.readbyqxmd.com/read/28463406/cpt11-prevents-virus-replication-in-jci-cells-persistently-infected-with-jc-polyomavirus
#5
Souichi Nukuzuma, Chiyoko Nukuzuma, Masanori Kameoka, Shigeki Sugiura, Kazuo Nakamichi, Takafumi Tasaki, Tsutomu Takegami
JC polyomavirus (JCPyV) is the causative agent of the demyelinating disease in the central nervous system, known as PML in immunocompromised patients. Moreover, PML occurred in patients treated with natalizumab for MS or Crohn's disease as natalizumab-related PML. Many antiviral agents are being investigated due to the lack of drugs currently available for PML. The previous study demonstrated that the topoisomerase I inhibitors topotecan and β-lapachone have inhibitory effects on JCPyV replication in IMR-32 cells...
May 2, 2017: Microbiology and Immunology
https://www.readbyqxmd.com/read/28462542/clinical-profile-and-outcome-of-progressive-multifocal-leukoencephalopathy-in-hiv-infected-indian-patients
#6
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/28445498/metabolic-profiles-by-1h-magnetic-resonance-spectroscopy-in-natalizumab-associated-post-pml-lesions-of-multiple-sclerosis-patients-who-survived-progressive-multifocal-leukoencephalopathy-pml
#7
Ruth Schneider, Barbara Bellenberg, Robert Hoepner, Eva-Maria Kolb, Gisa Ellrichmann, Aiden Haghikia, Ralf Gold, Carsten Lukas
PURPOSE: Early diagnosis and treatment of multiple sclerosis-related progressive multifocal leukoencephalopathy (PML) significantly improve clinical outcomes. However, there is a lack of information regarding the restart of immunomodulatory therapy in the post-PML setting, when multiple sclerosis activity reappears. We aimed at the examination of metabolic differences using 1H-magnetic resonance spectroscopy (1H-MRS) in multiple sclerosis patients at various post-PML stages and at the exploration of differences according to their disease and JC virus (JCV) status...
2017: PloS One
https://www.readbyqxmd.com/read/28439420/an-unusual-cause-of-fatal-rapid-onset-ataxia-plus-syndrome
#8
Ivan Kmezic, Jan Weinberg, Dan Hauzenberger, Farouk Hashim, Evangelia Kollia, Monika Klimkowska, Inger Nennesmo, Martin Paucar
BACKGROUND: Progressive multifocal leukoencephalopathy (PML) is a demyelinating disorder of the central nervous system caused by reactivation of the JC-virus and is in most cases associated with underlying immunosuppression. Acquired immune deficiency syndrome (AIDS) and hematological malignancies are well-known predisposing factors for PML. However, in the past ten years, various pharmacological agents have been associated with increased risk of PML. Based on the phenomenology PML can be divided into the cerebral form and the rare cerebellar form...
2017: Cerebellum & Ataxias
https://www.readbyqxmd.com/read/28438210/specific-and-quantitative-detection-of-human-polyomaviruses-bkpyv-and-jcpyv-in-the-healthy-pakistani-population
#9
Iqra Hussain, Fareeda Tasneem, Muhammed Umer, Ayesha Pervaiz, Muslim Raza, Muhammad Imran Arshad, Naveed Shahzad
BACKGROUND: The BK Polyomavirus (BKPyV) and JC polyomavirus (JCPyV) infections are widespread in human population and have been associated with severe kidney and brain disorders, respectively. The viruses remain latent primarily in reno-urinary tract, reactivating only in case of a compromised immune system. The seroepidemiology and molecular prevalence of BKPyV and JCPyV have been widely studied both in healthy and immunocompromised patients worldwide. However, data regarding the prevalence of these viruses in the immunocompetent or apparently healthy Pakistani population is lacking...
April 24, 2017: Virology Journal
https://www.readbyqxmd.com/read/28415933/incidence-risk-factors-and-the-effect-of-polyomavirus-infection-in-hematopoietic-stem-cell-transplant-recipients
#10
Jianhua Hu, Siying Li, Meifang Yang, Lichen Xu, Xuan Zhang, Hong Zhao, Huihui Dong, Yaping Huang, Jun Fan, Lanjuan Li
Objective The effect of polyomavirus infection in HSCT recipients is poorly understood. Methods We evaluated 38 HSCT recipients. Polyomavirus was detected by nested qualitative polymerase chain reaction (PCR) assays of urine. The risk factors for BK virus and JC virus were analysed. The kidney and liver functions of infected and uninfected patients were compared. Results BK virus, JC virus, and simian virus 40 were detected in 21%, 42%, and 0% of HSCT recipients respectively. HCMV infection was found to be an independent risk factor for JC virus infection (odds ratio (OR): 8...
April 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/28413713/catastrophic-outcome-of-patients-with-a-rebound-after-natalizumab-treatment-discontinuation
#11
Inés González-Suarez, Luis Rodríguez de Antonio, Aida Orviz, Sara Moreno-García, María D Valle-Arcos, Jordi A Matias-Guiu, Cristina Valencia, Manuela Jorquera Moya, Celia Oreja-Guevara
INTRODUCTION: Natalizumab (NTZ) is an effective drug for the treatment of relapsing-remitting multiple sclerosis. In some patients discontinuation is mandatory due to the risk of progressive multifocal leukoencephalopathy. However, severe clinical and radiological worsening has been described after drug cessation. Our aim was to describe the clinical and radiological features of the rebound phenomenon. MATERIAL AND METHODS: Patients switched from NTZ to Fingolimod (FTY) who had presented a rebound after discontinuation were selected...
April 2017: Brain and Behavior
https://www.readbyqxmd.com/read/28362268/progressive-multifocal-leukoencephalopathy-due-to-john-cunningham-jc-virus-following-allogeneic-hematopoietic-cell-transplantation
#12
Wilson Lam, Zeyad Al-Shaibani, Deepali Kumar, Auro Viswabandya, Santhosh Thyagu, Fotios V Michelis, Jeffrey H Lipton, Hans A Messner, Uday Deotare
Progressive multifocal leukoencephalopathy (PML) is an uncommon infectious complication post allogeneic stem cell transplant (allo-SCT). We present a case report of a patient developing this complication with a review of the current literature. It also describes the first use of artesunate in a clinical case of PML with no beneficial effect.
March 31, 2017: Antiviral Therapy
https://www.readbyqxmd.com/read/28348775/progressive-multifocal-leukoencephalopathy-and-black-fungus-in-a-patient-with-rheumatoid-arthritis-without-severe-lymphocytopenia
#13
Marieke J A de Regt, Jean-Luc Murk, Tilman Schneider-Hohendorf, Mike P Wattjes, Andy I M Hoepelman, Joop E Arends
INTRODUCTION: Progressive multifocal leukoencephalopathy (PML) is a rare demyelinating brain infection caused by JC polyomavirus (JCV), primarily seen in patients with severely compromised cellular immunity. Clinical presentation varies depending on the affected white matter. PML prognosis is variable and effective treatments are lacking. CASE PRESENTATION: A 75-year-old Chinese woman with type 2 diabetes mellitus, chronic kidney disease and rheumatoid arthritis, treated with low-dose methotrexate and prednisolone for 2...
August 2016: JMM Case Reports
https://www.readbyqxmd.com/read/28323224/progressive-multifocal-leukoencephalopathy-and-rheumatoid-arthritis-treatments
#14
Gaëlle Clavel, Antoine Moulignier, Luca Semerano
Progressive multifocal leukoencephalopathy (PML) is a demyelinating disease of the central nervous system due to reactivation of the JC virus (JCV). PML is extremely uncommon despite the high prevalence of the virus in the general population. No specific treatment is available, and the prognosis is bleak. The diagnosis is based on brain imaging findings, detection of the JCV genome in cerebrospinal fluid samples and, in some cases, histological studies of the brain lesions. The pathophysiological mechanisms that drive the development of PML are incompletely understood...
March 16, 2017: Joint, Bone, Spine: Revue du Rhumatisme
https://www.readbyqxmd.com/read/28322482/progressive-multifocal-leukoencephalopathy-associated-with-fumaric-acid-esters-treatment-in-psoriasis-patients
#15
Deepak M W Balak, Enes Hajdarbegovic, Wichor M Bramer, Martino H A Neumann, H Bing Thio
BACKGROUND: Fumaric acid esters (FAEs) are a systemic treatment for psoriasis considered to have a favorable long-term safety profile without an increased risk for immunosuppression. However, progressive multifocal leukoencephalopathy (PML), a rare, opportunistic viral infection of the central nervous system, has been linked anecdotally to FAE treatment. OBJECTIVE: to assess clinical features and outcomes of FAE-associated PML cases. METHODS: Systematic literature search in multiple databases up to February, 25(th) 2016 for reports of PML in psoriasis patients treated with FAEs...
March 21, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/28321224/specific-igg-antibodies-react-to-mimotopes-of-bk-polyomavirus-a-small-dna-tumor-virus-in-healthy-adult-sera
#16
Silvia Pietrobon, Ilaria Bononi, Elisa Mazzoni, Francesca Lotito, Marco Manfrini, Andrea Puozzo, Federica Destro, Giovanni Guerra, Pier Francesco Nocini, Fernanda Martini, Mauro G Tognon
BK polyomavirus (BKPyV) was isolated in 1971 from the urine of a kidney transplant patient. Soon after its identification, BKPyV was characterized as a kidney-tropic virus, which is responsible of a significant fraction of the rejection of transplant kidney in the host. Moreover, in experimental conditions, BKPyV is able to transform different types of animal and human cells and to induce tumors of different histotypes in experimental animals. BKPyV DNA sequences have been detected in healthy individuals and cancer patients using polymerase chain reaction/Shouthern blot hybridization methods...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28319193/stability-and-predictive-value-of-anti-jcv-antibody-index-in-multiple-sclerosis-a-6-year-longitudinal-study
#17
Harald Hegen, Michael Auer, Gabriel Bsteh, Franziska Di Pauli, Tatiana Plavina, Janette Walde, Florian Deisenhammer, Thomas Berger
BACKGROUND: Risk of natalizumab-related progressive multifocal leukoencephalopathy is associated with the presence of anti-JC-virus (JCV) antibodies. OBJECTIVE: To investigate the longitudinal evolution of anti-JCV antibody index and to determine the predictive value of baseline anti-JCV antibody index for long-term stability of anti-JCV antibody status. METHODS: MS patients from the MS centre of Medical University of Innsbruck, who had serum sampling for a time period of 4-6 years at intervals of 6±3 months, were included in this retrospective, longitudinal study...
2017: PloS One
https://www.readbyqxmd.com/read/28295832/polyomavirus-micrornas-circulating-in-biological-fluids-during-viral-persistence
#18
REVIEW
Francesco Martelli, Simone Giannecchini
Increasing evidence suggests that microRNA-mediated gene silencing, detected during exosome intercellular communication between cells, may be exploited by persistent human viruses. Recently, it has been reported that human polyomaviruses encode microRNAs that downregulate large T expression and target host factors, helping the virus to escape immune elimination. Consequently, viral microRNAs and their genetic variability may have roles in the induction of polyomavirus reactivation, the success of persistence or replication and the development of diseases...
March 10, 2017: Reviews in Medical Virology
https://www.readbyqxmd.com/read/28295503/nuclear-magnetic-resonance-structure-of-the-human-polyoma-jc-virus-agnoprotein
#19
Pascale Coric, A Sami Saribas, Magid Abou-Gharbia, Wayne Childers, Jon H Condra, Martyn K White, Mahmut Safak, Serge Bouaziz
Agnoprotein is an important regulatory protein of the human polyoma JC virus (JCV) and plays critical roles during the viral replication cycle. It forms highly stable dimers and oligomers through its Leu/Ile/Phe-rich domain, which is important for the stability and function of the protein. We recently resolved the partial 3D structure of this protein by NMR using a synthetic peptide encompassing amino acids Thr17 to Gln52, where the Leu/Ile/Phe- rich region was found to adopt a major alpha-helix conformation spanning amino acids 23-39...
March 10, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28282574/long-term-effectiveness-and-safety-of-natalizumab-in-a-portuguese-population
#20
I Correia, S Batista, O Galego, I B Marques, J Jesus-Ribeiro, A I Martins, C Nunes, M C Macário, L Cunha, L Sousa
OBJECTIVES: Natalizumab long-term effectiveness data in real-world relapsing-remitting multiple sclerosis (RRMS) is needed. Our objective is to report the long-term effectiveness and safety of natalizumab in a cohort of RRMS patients. METHODS: This is a retrospective study of natalizumab treatment for two years or longer in RRMS. Annualized relapse rate, Expanded Disability Status Scale (EDSS), brain magnetic resonance imaging T2 lesion volume, JC virus antibody status, previous treatments and adverse events were analysed...
March 7, 2017: International Immunopharmacology
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