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https://www.readbyqxmd.com/read/28209721/the-cumulative-burden-of-double-stranded-dna-virus-detection-after-allogeneic-hct-is-associated-with-increased-mortality
#1
Joshua A Hill, Bryan T Mayer, Hu Xie, Wendy M Leisenring, Meei-Li Huang, Terry Stevens-Ayers, Filippo Milano, Colleen Delaney, Mohamed L Sorror, Brenda M Sandmaier, Garrett Nichols, Danielle M Zerr, Keith R Jerome, Joshua T Schiffer, Michael Boeckh
Strategies to prevent active infection with certain double-stranded DNA (dsDNA) viruses after allogeneic hematopoietic cell transplantation (HCT) are limited by incomplete understanding of their epidemiology and clinical impact. We retrospectively tested weekly plasma samples from allogeneic HCT recipients at our center from 2007-2014. We used quantitative PCR to test for cytomegalovirus (CMV), BK polyomavirus (BKV), human herpesvirus 6B (HHV-6B), HHV-6A, adenovirus (AdV), and Epstein-Barr virus (EBV) between days 0-100 post-HCT...
February 16, 2017: Blood
https://www.readbyqxmd.com/read/28207975/stabilization-of-renal-function-after-the-first-year-of-follow-up-in-kidney-transplant-recipients-treated-for-significant-bk-polyomavirus-infection-or-bk-polyomavirus-associated-nephropathy
#2
Marie-Christine Simard-Meilleur, Paule Bodson-Clermont, Gilles St-Louis, Michel R Pâquet, Catherine Girardin, Marie-Chantal Fortin, Héloïse Cardinal, Marie-Josée Hébert, Reneé Lévesque, Edith Renoult
BACKGROUND: BK polyomavirus virus (BKPyV) screening and immunosuppression reduction effectively prevent graft loss due to BKPyV-associated nephropathy (BKPVAN) during the first year after transplantation. The aim of our study was to evaluate the impact of this infection during longer follow-up periods. METHODS: We reviewed the outcome of our screening and immunosuppression reduction protocol in 305 patients who received a kidney transplant between March 2008 and January 2013...
February 16, 2017: Transplant Infectious Disease: An Official Journal of the Transplantation Society
https://www.readbyqxmd.com/read/28202068/the-dna-damage-response-promotes-polyomavirus-jc-infection-by-nucleus-to-cytoplasm-nf-kappab-activation
#3
Martyn K White, Anna Bellizzi, Gabriele Ibba, Valeria Pietropaolo, Anna T Palamara, Hassen S Wollebo
BACKGROUND: Infection of glial cells by human neurotropic polyomavirus JC (JCV), the causative agent of the CNS demyelinating disease progressive multifocal leukoencephalopathy (PML), rapidly inflicts damage to cellular DNA. This activates DNA damage response (DDR) signaling including induction of expression of DNA repair factor Rad51. We previously reported that Rad51 co-operates with the transcription factor NF-κB p65 to activate JCV early transcription. Thus Rad51 induction by JCV infection may provide positive feedback for viral activation early in JCV infection...
February 15, 2017: Virology Journal
https://www.readbyqxmd.com/read/28199755/incidence-and-risk-factor-of-hemorrhagic-cystitis-after-allogeneic-transplantation-with-fludarabine-busulfan-and-anti-thymocyte-globulin-myeloablative-conditioning
#4
Wilson Lam, Jan Storek, Haocheng Li, Michelle Geddes, Andrew Daly
BACKGROUND: Hemorrhagic cystitis (HC) is a complication of allogeneic stem cell transplantation (SCT), associated with factors such as BK polyomavirus reactivation, age, conditioning regimen, and presence of graft-versus-host disease (GVHD). The incidence and impact of HC in patients receiving fludarabine (Flu), busulfan (Bu), and anti-thymocyte globulin (ATG) conditioning is unknown. METHODS: We conducted a case-control study of patients undergoing SCT at our center between January 1, 2003 and Dec 31, 2012, to determine the incidence of HC and its effect on patient outcomes including overall survival (OS), relapse, non-relapse mortality, GVHD, and healthcare resource use...
February 15, 2017: Transplant Infectious Disease: An Official Journal of the Transplantation Society
https://www.readbyqxmd.com/read/28199663/potential-route-of-transmission-for-trichodysplasia-spinulosa-polyomavirus
#5
Seweryn Bialasiewicz, Lisa Byrom, Chris Fraser, Julia Clark
No abstract text is available yet for this article.
February 12, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28194491/-merkel-cell-carcinoma-cutaneous-manifestation-of-a-highly-malignant-pre-pro-b%C3%A2-cell-neoplasia-novel-concept-about-the-cellular-origin-of-merkel-cell-carcinoma
#6
REVIEW
C M Sauer, E Chteinberg, D Rennspiess, A K Kurz, A Zur Hausen
Merkel cell carcinoma (MCC) is a relatively rare but highly malignant non-melanoma skin cancer of the elderly and immunosuppressed patients. The discovery of the Merkel cell polyomavirus (MCPyV) in 2008 significantly impacted the understanding of the etiopathogenesis of MCC. MCPyV is clonally integrated into the MCC genome and approximately 80% of MCC are MCPyV-positive. Recent results of clinical trials using blockade of the PD-1 immune modulatory pathway are promising for the future treatment of MCC. Despite this major progress of the past few years, the cellular origin of MCC still remains obscure...
February 13, 2017: Der Hautarzt; Zeitschrift Für Dermatologie, Venerologie, und Verwandte Gebiete
https://www.readbyqxmd.com/read/28192039/endemic-infection-of-stranded-southern-sea-otters-enhydra-lutris-nereis-with-novel-parvovirus-polyomavirus-and-adenovirus
#7
Juliana D Siqueira, Terry Ng, Melissa Miller, Linlin Li, Xutao Deng, Erin Dodd, Francesca Batac, Eric Delwart
Over the past century, the southern sea otter (SSO; Enhydra lutris nereis) population has been slowly recovering from near extinction due to overharvest. The SSO is a threatened species under federal law and a fully protected species under California law. Through a multiagency collaborative program, stranded animals are rehabilitated and released, while deceased animals are necropsied and tissues are cryopreserved to facilitate scientific study. Here, we processed archival tissues to enrich particle-associated viral nucleic acids, which we randomly amplified and deeply sequenced to identify viral genomes through sequence similarities...
February 13, 2017: Journal of Wildlife Diseases
https://www.readbyqxmd.com/read/28189092/polyomavirus-bk-and-jc-in-individuals-with-chronic-kidney-failure-kidney-transplantation-and-healthy-controls
#8
Talita Castro, Maria Cristina Domingues Fink, Marilia Figueiredo, Paulo Henrique Braz-Silva, Cláudio Mendes Pannuti, Karem Lopez Ortega, Marina Gallottini
BACKGROUND: New clinical approaches to diagnose and monitor individuals with systemic diseases have been employed through the use of oral fluids. Polyomavirus BK (BKPyV) and JC (JCPyV) infect asymptomatically around 80% of general population worldwide remaining latent in the body. In case of immunosuppression, a replication can occur, leading to diseases. OBJECTIVE: The aim of this study was to detect and quantify BKPyV and JCPyV in oral fluids of individuals with chronic kidney failure (CKF), kidney transplantation (KT) and controls compared with their detection in blood and urine, traditionally used for this test...
February 6, 2017: Journal of Clinical Virology: the Official Publication of the Pan American Society for Clinical Virology
https://www.readbyqxmd.com/read/28187346/hydrologic-land-cover-and-seasonal-patterns-of-waterborne-pathogens-in-great-lakes-tributaries
#9
P L Lenaker, S R Corsi, M A Borchardt, S K Spencer, A K Baldwin, M A Lutz
Great Lakes tributaries are known to deliver waterborne pathogens from a host of sources. To examine the hydrologic, land cover, and seasonal patterns of waterborne pathogens (i.e. protozoa (2), pathogenic bacteria (4) human viruses, (8) and bovine viruses (8)) eight rivers were monitored in the Great Lakes Basin over 29 months from February 2011 to June 2013. Sampling locations represented a wide variety of land cover classes from urban to agriculture to forest. A custom automated pathogen sampler was deployed at eight sampling locations which provided unattended, flow-weighted, large-volume (120-1630 L) sampling...
February 7, 2017: Water Research
https://www.readbyqxmd.com/read/28186546/case-control-assessment-of-the-roles-of-noroviruses-human-bocaviruses-2-3-and-4-and-novel-polyomaviruses-and-astroviruses-in-acute-childhood-diarrhea
#10
Rimma Melamed, Gregory A Storch, Lori R Holtz, Eileen J Klein, Brittany Herrin, Phillip I Tarr, Donna M Denno
No abstract text is available yet for this article.
February 10, 2017: Journal of the Pediatric Infectious Diseases Society
https://www.readbyqxmd.com/read/28183780/complete-genome-sequence-of-bk-polyomavirus-subtype-ib-1-detected-in-a-kidney-transplant-patient-with-bk-viremia-using-shotgun-sequencing
#11
Ravi Ranjan, Asha Rani, Daniel C Brennan, Patricia W Finn, David L Perkins
We report here the complete genome sequence of polyomavirus BK subtype Ib-1, isolate AR11, identified in urine from a human kidney transplant recipient with a clinical diagnosis of BK viremia. The AR11 isolate is closely related to reference strain human polyomavirus 1 isolate J2B-2 with 99% identity.
February 9, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28177804/entry-infection-replication-and-egress-of-human-polyomaviruses-an-update
#12
Soumen Bhattacharjee, Sutanuka Chattaraj
Polyomaviruses (PyVs), belonging to the family Polyomaviridae, are a group of small, nonenveloped, double-stranded, circular DNA viruses widely distributed in the vertebrates. PyVs cause no apparent disease in adult laboratory mice but cause a wide variety of tumors when artificially inoculated into neonates or semipermissive animals. A few human PyVs, such as BK, JC, and Merkel cell PyVs, have been unequivocally linked to pathogenesis under conditions of immunosuppression. Infection is thought to occur early in life and persists for the lifespan of the host...
October 29, 2016: Canadian Journal of Microbiology
https://www.readbyqxmd.com/read/28174598/review-on-the-role-of-the-human-polyomavirus-jc-in-the-development-of-tumors
#13
REVIEW
Serena Delbue, Manola Comar, Pasquale Ferrante
Almost one fifth of human cancers worldwide are associated with infectious agents, either bacteria or viruses, and this makes the possible association between infections and tumors a relevant research issue. We focused our attention on the human Polyomavirus JC (JCPyV), that is a small, naked DNA virus, belonging to the Polyomaviridae family. It is the recognized etiological agent of the Progressive Multifocal Leukoencephalopathy (PML), a fatal demyelinating disease, occurring in immunosuppressed individuals...
2017: Infectious Agents and Cancer
https://www.readbyqxmd.com/read/28174236/merkel-cell-carcinomas-arising-in-autoimmune-disease-affected-patients-treated-with-biological-drugs-including-tnf
#14
John C Rotondo, Ilaria Bononi, Andrea Puozzo, Marcello Govoni, Valentina Foschi, Giovanni Lanza, Roberta Gafà, Antoine Touzè, Pauline Gaboriaud, Rita Selvatici, Fernanda Martini, Mauro Tognon
PURPOSE: The purpose of this investigation was to characterize Merkel cell carcinomas (MCC) arising in patients affected by auto-immune diseases, treated with biologic drugs. EXPERIMENTAL DESIGN: Serum samples from MCC patients were analyzed for the presence and titer of antibodies against antigens of the oncogenic Merkel cell polyomavirus (MCPyV). IgG antibodies against the viral oncoproteins Large T (LT) and small t (ST) antigens and the viral capsid protein 1 were analyzed by indirect E...
February 7, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28164464/hydrophobic-domains-of-mouse-polyomavirus-minor-capsid-proteins-promote-membrane-association-and-virus-exit-from-the-er
#15
Sandra Huérfano, Boris Ryabchenko, Hana Spanielová, Jitka Forstová
The minor structural protein VP2 and its shorter variant, VP3, of mouse polyomavirus (MPyV) are essential for virus exit from the ER during viral trafficking to the nucleus. Here, we followed the role of putative hydrophobic domains (HD) of the minor proteins in membrane affinity and viral infectivity. We prepared variants of VP2, each mutated to decrease hydrophobicity of one of three predicted hydrophobic domains: VP2-mHD1, VP2-mHD2 or VP2-mHD3 mutated in HD1 (aa 60-101), HD2 (aa 125-165) or HD3 (aa 287-307), respectively...
February 5, 2017: FEBS Journal
https://www.readbyqxmd.com/read/28160087/nationwide-survey-of-bk-polyomavirus-associated-hemorrhagic-cystitis-in-adult-allogeneic-stem-cell-transplantation-among-haematologists-and-urologists
#16
Laila Schneidewind, Thomas Neumann, Jennifer Kranz, Florian Knoll, Alexandre Egon Pelzer, Christian Schmidt, William Krüger
There are no epidemiological data on BK virus associated hemorrhagic cystitis (BKHC) in adult allogeneic stem cell transplantation in Germany available and associations with clinical conditions like GvHD are controversially discussed. Therefore, we conducted a nationwide survey among haematologists and urologists about this disease. We developed two questionnaires, one for haematologists (26 items) and one for urologists (20 items) concerning BKHC in adult allogeneic stem cell transplantation with epidemiological data and clinical implications...
February 3, 2017: Annals of Hematology
https://www.readbyqxmd.com/read/28159789/cross-comparison-of-human-wastewater-associated-molecular-markers-in-relation-to-fecal-indicator-bacteria-and-enteric-viruses-in-recreational-beach-waters
#17
B Hughes, D Beale, P G Dennis, S Cook, W Ahmed
: Detecting human wastewater contamination in recreational waters is of critical importance to regulators due to the risks posed to public health. To identify such risks, human wastewater associated microbial source tracking (MST) markers have been developed. At present, however, greater understanding of the suitability of these markers for the detection of diluted human wastewater in environmental waters is necessary to predict risk. Here, we compared the process limit of detection (PLOD) and quantification (PLOQ) of six human wastewater associated MST markers [Bacteroides HF183 (HF183), E...
February 3, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28155809/from-evolutionary-advantage-to-disease-agents-forensic-reevaluation-of-host-microbe-interactions-and-pathogenicity
#18
Jessica I Rivera-Pérez, Alfredo A González, Gary A Toranzos
As the "human microbiome era" continues, there is an increasing awareness of our resident microbiota and its indispensable role in our fitness as holobionts. However, the host-microbe relationship is not so clearly defined for some human symbionts. Here we discuss examples of "accidental pathogens," meaning previously nonpathogenic and/or environmental microbes thought to have inadvertently experienced an evolutionary shift toward pathogenicity. For instance, symbionts such as Helicobacter pylori and JC polyomavirus have been shown to have accompanied humans since prehistoric times and are still abundant in extant populations as part of the microbiome...
January 2017: Microbiology Spectrum
https://www.readbyqxmd.com/read/28154141/the-nonreceptor-tyrosine-kinase-c-src-attenuates-scf-%C3%AE-trcp-e3-ligase-activity-abrogating-taz-proteasomal-degradation
#19
Matan Shanzer, Julia Adler, Inna Ricardo-Lax, Nina Reuven, Yosef Shaul
The polyomavirus middle T antigen (PyMT) oncogene activates the cellular nonreceptor tyrosine kinase c-Src and recruits the Hippo pathway effectors, Yap (yes-associated protein) and Taz (transcriptional coactivator with PDZ-binding motif), as key steps in oncogenesis. Yap and Taz are transcription coactivators shuttling from the cytoplasm to the nucleus. The Hippo pathway kinase Lats1/2 (large tumor suppressor homolog) reduces Yap/Taz nuclear localization and minimizes their cytoplasmic levels by facilitating their ubiquitination by the E3 ligase SCF(β-TrCP)...
February 14, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28150409/bizarre-cell-dysplasia-of-the-cervix
#20
Ondrej Ondič, Radoslav Ferko, Jana Kašpírková, Marián Švajdler, Boris Rýchly, Peter Talarčík, Jiří Bouda, Michal Michal
AIM: The aim of this study was the characterization of a new subtype of high-grade cervical squamous intraepithelial lesion (HSIL) with enlarged cells containing bizarre nuclei: so-called bizarre cell dysplasia (BCD). METHODS: A total of 29 cervical cone biopsy samples of this type of dysplasia were studied. Multi-target polymerase chain reaction and in situ hybridization human papillomavirus (HPV) detection was performed in all cases. BCD was defined as a subtype of HSIL characterized by the presence of large dysplastic cells with abnormal, large pleomorphic nuclei or multinucleation causing nucleomegaly...
February 2017: Journal of Obstetrics and Gynaecology Research
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