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https://www.readbyqxmd.com/read/28413724/are-anti-ganglioside-antibodies-associated-with-proventricular-dilatation-disease-in-birds
#1
Jeann Leal de Araujo, Ian Tizard, Jianhua Guo, J Jill Heatley, Aline Rodrigues Hoffmann, Raquel R Rech
The identification of Parrot bornaviruses (PaBV) in psittacine birds with proventricular dilatation disease (PDD) has not been sufficient to explain the pathogenesis of this fatal disease, since not all infected birds develop clinical signs. Although the most accepted theory indicates that PaBV directly triggers an inflammatory response in this disease, another hypothesis suggests the disease is triggered by autoantibodies targeting neuronal gangliosides, and PDD might therefore resemble Guillain-Barré Syndrome (GBS) in its pathogenesis...
2017: PeerJ
https://www.readbyqxmd.com/read/28301249/investigation-of-different-infection-routes-of-parrot-bornavirus-in-cockatiels
#2
Julia Heckmann, Dirk Enderlein, Anne K Piepenbring, Sibylle Herzog, Ursula Heffels-Redmann, Sara Malberg, Christiane Herden, Michael Lierz
The aim of this study was to determine the natural infection route of parrot bornavirus (PaBV), the causative agent of proventricular dilatation disease (PDD) in psittacines. For this purpose, nine cockatiels ( Nymphicus hollandicus ) were inoculated orally, and nine cockatiels were inoculated intranasally, with a PaBV-4 isolate. To compare the results of the trials, the same isolate and the same experimental design were used as in a previous study where infection was successful by intravenous as well as intracerebral inoculation...
March 2017: Avian Diseases
https://www.readbyqxmd.com/read/28221112/variegated-squirrel-bornavirus-1-in-squirrels-germany-and-the-netherlands
#3
Kore Schlottau, Maria Jenckel, Judith van den Brand, Christine Fast, Christiane Herden, Dirk Höper, Timo Homeier-Bachmann, Jens Thielebein, Niels Mensing, Bert Diender, Donata Hoffmann, Rainer G Ulrich, Thomas C Mettenleiter, Marion Koopmans, Dennis Tappe, Jonas Schmidt-Chanasit, Chantal B E M Reusken, Martin Beer, Bernd Hoffmann
We screened squirrels in Germany and the Netherlands for the novel zoonotic variegated squirrel bornavirus 1 (VSBV-1). The detection of VSBV-1 in 11 squirrels indicates a considerable risk for transmission to humans handling those animals. Therefore, squirrels in contact with humans should routinely be tested for VSBV-1.
March 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28155804/the-pathogenesis-of-proventricular-dilatation-disease
#4
Ian Tizard, H L Shivaprasad, Jianhua Guo, Samer Hameed, Judith Ball, Susan Payne
Bornaviruses cause neurologic diseases in several species of birds, especially parrots, waterfowl and finches. The characteristic lesions observed in these birds include encephalitis and gross dilatation of the anterior stomach - the proventriculus. The disease is thus known as proventricular dilatation disease (PDD). PDD is characterized by extreme proventricular dilatation, blockage of the passage of digesta and consequent death by starvation. There are few clinical resemblances between this and the bornaviral encephalitides observed in mammals...
December 2016: Animal Health Research Reviews
https://www.readbyqxmd.com/read/28050187/detection-of-borna-disease-virus-bdv-in-patients-with-first-episode-of-schizophrenia
#5
Hasan Soltani, Serwa Mohammadzadeh, Manoochehr Makvandi, Siroos Pakseresht, Alireza Samarbaf-Zadeh
Objective: Schizophrenia is a complex widespread neuropsychiatric disorder. This illness encompasses a complex debilitating mental disorder causing illusion, delusion, disturbed relationship, low motivation and decline of emotion. Viral infection of the brain including Borna Disease Virus (BDV) may play a role in transient or permanent neurological and behavioral abnormalities. This role of Borna virus has not been resolved outright yet, and based on published papers investigation examining the role of this virus in schizophrenia is in progress worldwide...
October 2016: Iranian Journal of Psychiatry
https://www.readbyqxmd.com/read/28017426/viral-vector-vaccines-protect-cockatiels-from-inflammatory-lesions-after-heterologous-parrot-bornavirus-2-challenge-infection
#6
Solveig Runge, Marita Olbert, Christiane Herden, Sara Malberg, Angela Römer-Oberdörfer, Peter Staeheli, Dennis Rubbenstroth
Avian bornaviruses are causative agents of proventricular dilatation disease (PDD), a chronic neurologic and often fatal disorder of psittacines including endangered species. To date no causative therapy or immunoprophylaxis is available. Our previous work has shown that viral vector vaccines can delay the course of homologous bornavirus challenge infections but failed to protect against PDD when persistent infection was not prevented. The goal of this study was to refine our avian bornavirus vaccination and infection model to better represent natural bornavirus infections in order to achieve full protection against a heterologous challenge infection...
December 22, 2016: Vaccine
https://www.readbyqxmd.com/read/27830736/viral-vector-vaccines-expressing-nucleoprotein-and-phosphoprotein-genes-of-avian-bornaviruses-ameliorate-homologous-challenge-infections-in-cockatiels-and-common-canaries
#7
Marita Olbert, Angela Römer-Oberdörfer, Christiane Herden, Sara Malberg, Solveig Runge, Peter Staeheli, Dennis Rubbenstroth
Avian bornaviruses are causative agents of proventricular dilatation disease (PDD), an often fatal disease of parrots and related species (order Psittaciformes) which is widely distributed in captive psittacine populations and may affect endangered species. Here, we established a vaccination strategy employing two different well described viral vectors, namely recombinant Newcastle disease virus (NDV) and modified vaccinia virus Ankara (MVA) that were engineered to express the phosphoprotein and nucleoprotein genes of two avian bornaviruses, parrot bornavirus 4 (PaBV-4) and canary bornavirus 2 (CnBV-2)...
November 10, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27739501/the-bornavirus-derived-human-protein-ebln1-promotes-efficient-cell-cycle-transit-microtubule-organisation-and-genome-stability
#8
Katie N Myers, Giancarlo Barone, Anil Ganesh, Christopher J Staples, Anna E Howard, Ryan D Beveridge, Sarah Maslen, J Mark Skehel, Spencer J Collis
It was recently discovered that vertebrate genomes contain multiple endogenised nucleotide sequences derived from the non-retroviral RNA bornavirus. Strikingly, some of these elements have been evolutionary maintained as open reading frames in host genomes for over 40 million years, suggesting that some endogenised bornavirus-derived elements (EBL) might encode functional proteins. EBLN1 is one such element established through endogenisation of the bornavirus N gene (BDV N). Here, we functionally characterise human EBLN1 as a novel regulator of genome stability...
October 14, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27590473/screening-red-foxes-vulpes-vulpes-for-possible-viral-causes-of-encephalitis
#9
Manon Bourg, Daniel Nobach, Sibylle Herzog, Hildburg Lange-Herbst, Anne Nesseler, Hans-Peter Hamann, Sabrina Becker, Dirk Höper, Bernd Hoffmann, Markus Eickmann, Christiane Herden
BACKGROUND: Next to various known infectious and non-infectious causes, the aetiology of non-suppurative encephalitis in red foxes (Vulpes vulpes) often remains unclear. Known causes in foxes imply rabies, canine distemper, toxoplasmosis, Aujeszky's disease, as well as parvovirus, adenovirus, circovirus and flavivirus infections. In this study, particular attention was paid on bornaviruses, since red foxes are predators of bicoloured white-toothed shrews, a reservoir of Borna disease virus 1 (BoDV-1)...
2016: Virology Journal
https://www.readbyqxmd.com/read/27537693/phylogenetic-analysis-supports-horizontal-transmission-as-a-driving-force-of-the-spread-of-avian-bornaviruses
#10
Dennis Rubbenstroth, Volker Schmidt, Monika Rinder, Marko Legler, Sönke Twietmeyer, Phillip Schwemmer, Victor M Corman
BACKGROUND: Avian bornaviruses are a genetically diverse group of viruses initially discovered in 2008. They are known to infect several avian orders. Bornaviruses of parrots and related species (Psittaciformes) are causative agents of proventricular dilatation disease, a chronic and often fatal neurologic disease widely distributed in captive psittacine populations. Although knowledge has considerably increased in the past years, many aspects of the biology of avian bornaviruses are still undiscovered...
2016: PloS One
https://www.readbyqxmd.com/read/27518265/exaptation-of-bornavirus-like-nucleoprotein-elements-in-afrotherians
#11
Yuki Kobayashi, Masayuki Horie, Ayumi Nakano, Koichi Murata, Takuya Itou, Yoshiyuki Suzuki
Endogenous bornavirus-like nucleoprotein elements (EBLNs), the nucleotide sequence elements derived from the nucleoprotein gene of ancient bornavirus-like viruses, have been identified in many animal genomes. Here we show evidence that EBLNs encode functional proteins in their host. Some afrotherian EBLNs were observed to have been maintained for more than 83.3 million years under negative selection. Splice variants were expressed from the genomic loci of EBLNs in elephant, and some were translated into proteins...
August 2016: PLoS Pathogens
https://www.readbyqxmd.com/read/27510928/endogenous-non-retroviral-rna-virus-elements-evidence-a-novel-type-of-antiviral-immunity
#12
COMMENT
Tomoyuki Honda, Keizo Tomonaga
Vertebrate genomes contain many virus-related sequences derived from both retroviruses and non-retroviral RNA and DNA viruses. Such non-retroviral RNA sequences are possibly produced by reverse-transcription and integration of viral mRNAs of ancient RNA viruses using retrotransposon machineries. We refer to this process as transcript reversion. During an ancient bornavirus infection, transcript reversion may have left bornavirus-related sequences, known as endogenous bornavirus-like nucleoproteins (EBLNs), in the genome...
May 2016: Mobile Genetic Elements
https://www.readbyqxmd.com/read/27499253/establishment-and-characterization-of-a-cell-line-derived-from-eptesicus-nilssonii
#13
Masayuki Horie, Takumi Akasaka, Sachiko Matsuda, Haruko Ogawa, Kunitoshi Imai
Bats of the genus Eptesicus have several non-retroviral RNA virus-derived sequences in their genomes, among which an endogenous bornavirus-like L element, named eEBLL-1, was suggested to encode functional proteins in the hosts. However, the function of eEBLL-1 remains unclear due to a lack of appropriate investigation tools, such as cultured cells expressing eEBLL-1. Here, we established a continuous cell line, named HAMOI-EnK cells, from kidney of Eptesicus nilssonii. HAMOI-EnK cells are robust and could be passaged for at least 10 months...
December 1, 2016: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/27439314/synergistic-antiviral-activity-of-ribavirin-and-interferon-%C3%AE-against-parrot-bornaviruses-in-avian-cells
#14
Antje Reuter, Masayuki Horie, Dirk Höper, Annette Ohnemus, Andreas Narr, Monika Rinder, Martin Beer, Peter Staeheli, Dennis Rubbenstroth
Avian bornaviruses are the causative agents of proventricular dilatation disease (PDD), a widely distributed and often fatal disease in captive psittacines. Because neither specific prevention measures nor therapies against PDD and bornavirus infections are currently available, new antiviral strategies are required to improve animal health. We show here that the nucleoside analogue ribavirin inhibited bornavirus activity in a polymerase reconstitution assay and reduced viral load in avian cell lines infected with two different parrot bornaviruses...
September 2016: Journal of General Virology
https://www.readbyqxmd.com/read/27212192/the-pathogenesis-of-bornaviral-diseases-in-mammals
#15
Ian Tizard, Judith Ball, George Stoica, Susan Payne
Natural bornavirus infections and their resulting diseases are largely restricted to horses and sheep in Central Europe. The disease also occurs naturally in cats, and can be induced experimentally in laboratory rodents and numerous other mammals. Borna disease virus-1 (BoDV-1), the cause of most cases of mammalian Borna disease, is a negative-stranded RNA virus that replicates within the nucleus of target cells. It causes severe, often lethal, encephalitis in susceptible species. Recent events, especially the discovery of numerous new species of bornaviruses in birds and a report of an acute, lethal bornaviral encephalitis in humans, apparently acquired from squirrels, have revived interest in this remarkable family of viruses...
May 23, 2016: Animal Health Research Reviews
https://www.readbyqxmd.com/read/27174689/an-rna-dependent-rna-polymerase-gene-in-bat-genomes-derived-from-an-ancient-negative-strand-rna-virus
#16
Masayuki Horie, Yuki Kobayashi, Tomoyuki Honda, Kan Fujino, Takumi Akasaka, Claudia Kohl, Gudrun Wibbelt, Kristin Mühldorfer, Andreas Kurth, Marcel A Müller, Victor M Corman, Nadine Gillich, Yoshiyuki Suzuki, Martin Schwemmle, Keizo Tomonaga
Endogenous bornavirus-like L (EBLL) elements are inheritable sequences derived from ancient bornavirus L genes that encode a viral RNA-dependent RNA polymerase (RdRp) in many eukaryotic genomes. Here, we demonstrate that bats of the genus Eptesicus have preserved for more than 11.8 million years an EBLL element named eEBLL-1, which has an intact open reading frame of 1,718 codons. The eEBLL-1 coding sequence revealed that functional motifs essential for mononegaviral RdRp activity are well conserved in the EBLL-1 genes...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27166599/sequence-determination-of-a-new-parrot-bornavirus-5-strain-in-japan-implications-of-clade-specific-sequence-diversity-in-the-regions-interacting-with-host-factors
#17
Ryo Komorizono, Akiko Makino, Masayuki Horie, Tomoyuki Honda, Keizo Tomonaga
In this study, the genome sequence of a new parrot bornavirus-5 (PaBV-5) detected in Eclectus roratus was determined. Phylogenetic analysis showed that the genus Bornavirus is divided into three major clades and that PaBV-5 belongs to clade 2, which contains avian viruses that exhibit infectivity to mammalian cells. Sequence comparisons of the regions known to interact with host factors indicated that the clade 2 avian viruses possess sequences intermediate between the clade 1 mammalian viruses and the clade 3 avian viruses, suggesting that the identified regions might contribute to the differences in virological properties between the three clades...
June 2016: Microbiology and Immunology
https://www.readbyqxmd.com/read/27100150/parrot-bornavirus-pabv-2-isolate-causes-different-disease-patterns-in-cockatiels-than-pabv-4
#18
Anne K Piepenbring, Dirk Enderlein, Sibylle Herzog, Basim Al-Ibadi, Ursula Heffels-Redmann, Julia Heckmann, Hildburg Lange-Herbst, Christiane Herden, Michael Lierz
Psittaciform 1 bornavirus (PaBV) has already been shown to be the aetiologic agent of proventricular dilatation disease, a significant disease of birds. However, the pathogenesis of PaBV infection has not yet been resolved and valid data regarding the pathogenicity of different PaBV species are lacking. Thus, the present study was aimed to characterize the influence of two different PaBV species on the course of disease. Eighteen cockatiels were inoculated intracerebrally (i.c.) or intravenously (i.v.) with a PaBV-2 isolate under the same conditions as in a previous study using PaBV-4...
2016: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/27023521/knock-down-of-endogenous-bornavirus-like-nucleoprotein-1-inhibits-cell-growth-and-induces-apoptosis-in-human-oligodendroglia-cells
#19
Peng He, Lin Sun, Dan Zhu, Hong Zhang, Liang Zhang, Yujie Guo, Siwen Liu, Jingjing Zhou, Xiaoyan Xu, Peng Xie
Endogenous bornavirus-like nucleoprotein elements (EBLNs) have been discovered in the genomes of various animals including humans, whose functions have been seldom studied. To explore the biological functions of human EBLNs, we constructed a lentiviral vector expressing a short-hairpin RNA against human EBLN1, which successfully inhibited EBLN1 expression by above 80% in infected human oligodendroglia cells (OL cells). We found that EBLN1 silencing suppressed cell proliferation, induced G2/M phase arrest, and promoted apoptosis in OL cells...
March 24, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/26584356/aquatic-bird-bornavirus-1-in-wild-geese-denmark
#20
Anders F Thomsen, Jesper B Nielsen, Charlotte K Hjulsager, Mariann Chriél, Dale A Smith, Mads F Bertelsen
To investigate aquatic bird bornavirus 1 in Europe, we examined 333 brains from hunter-killed geese in Denmark in 2014. Seven samples were positive by reverse transcription PCR and were 98.2%-99.8% identical; they were also 97.4%-98.1% identical to reference strains of aquatic bird bornavirus 1 from geese in North America.
December 2015: Emerging Infectious Diseases
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