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https://www.readbyqxmd.com/read/28717398/preclinical-evaluation-of-nf-%C3%AE%C2%BAb-triggered-dendritic-cells-expressing-the-viral-oncogenic-driver-of-merkel-cell-carcinoma-for-therapeutic-vaccination
#1
Kerstin F Gerer, Michael Erdmann, Sine R Hadrup, Rikke Lyngaa, Lena-Marie Martin, Reinhard E Voll, Beatrice Schuler-Thurner, Gerold Schuler, Niels Schaft, Stefanie Hoyer, Jan Dörrie
BACKGROUND: Merkel cell carcinoma (MCC) is a rare but very aggressive skin tumor that develops after integration of a truncated form of the large T-antigen (truncLT) of the Merkel cell polyomavirus (MCV) into the host's genome. Therapeutic vaccination with dendritic cells (DCs) loaded with tumor antigens is an active form of immunotherapy, which intends to direct the immune system towards tumors which express the respective vaccination antigens. METHODS: Cytokine-matured monocyte-derived DCs of healthy donors and MCC patients were electroporated with mRNA encoding the truncLT...
July 2017: Therapeutic Advances in Medical Oncology
https://www.readbyqxmd.com/read/28704770/detection-of-oncogenic-viruses-in-water-environments-by-a-luminex-based-multiplex-platform-for-high-throughput-screening-of-infectious-agents
#2
P Di Bonito, M Iaconelli, T Gheit, M Tommasino, S Della Libera, L Bonadonna, G La Rosa
Recent studies documented the detection of viruses strongly associated with human cancer in urban sewages and other water environments worldwide. The aim of this study was to estimate the occurrence of human oncogenic viruses in environmental samples (sewage, river, marine, and pool/spa water) using highly sensitive and specific multiplex bead-based assays (Luminex technology). A total of 33 samples were analysed for 140 oncogenic viral agents, including mucosal and cutaneous human papillomaviruses (HPVs), human polyomaviruses (HPyV), human herpesviruses (HHV) and mouse mammary tumour virus (MMTV)...
July 5, 2017: Water Research
https://www.readbyqxmd.com/read/28697828/-a-molecular-epidemiological-study-of-ki-polyomavirus-and-wu-polyomavirus-in-children-with-acute-respiratory-infection-in-tianjin-china
#3
Shu-Xiang Lin, Wei Wang, Wei Guo, Hong-Jiang Yang, Bai-Cheng Ma, Yu-Lian Fang, Yong-Sheng Xu
OBJECTIVE: To investigate the relationship of KI polyomavirus (KIPyV) and WU polyomavirus (WUPyV) with acute respiratory infection in children in Tianjin, China. METHODS: A total of 3 730 nasopharyngeal secretions were collected from hospitalized children with acute respiratory infection in Tianjin Children's Hospital from January 2011 to December 2013. Viral nucleic acid was extracted, and virus infection (KIPyV and WUPyV) was determined by PCR. Some KIPyV-positive and WUPyV-positive PCR products were subjected to sequencing...
July 2017: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/28693804/reviewing-the-current-evidence-supporting-early-b-cells-as-the-cellular-origin-of-merkel-cell-carcinoma
#4
REVIEW
C M Sauer, A M Haugg, E Chteinberg, D Rennspiess, V Winnepenninckx, E-J Speel, J C Becker, A K Kurz, A Zur Hausen
Merkel cell carcinoma (MCC) is a highly malignant skin cancer characterized by early metastases and poor survival. Although MCC is a rare malignancy, its incidence is rapidly increasing in the U.S. and Europe. The discovery of the Merkel cell polyomavirus (MCPyV) has enormously impacted our understanding of its etiopathogenesis and biology. MCCs are characterized by trilinear differentiation, comprising the expression of neuroendocrine, epithelial and B-lymphoid lineage markers. To date, it is generally accepted that the initial assumption of MCC originating from Merkel cells (MCs) is unlikely...
August 2017: Critical Reviews in Oncology/hematology
https://www.readbyqxmd.com/read/28681977/detection-and-quantification-of-merkel-cell-polyomavirus-analysis-of-merkel-cell-carcinoma-cases-from-1977-to-2015
#5
Marta E Álvarez-Argüelles, Santiago Melón, Susana Rojo, Ana Fernandez-Blázquez, Jose Antonio Boga, Ana Palacio, Blanca Vivanco, María de Oña
BACKGROUND: This study investigates the presence of Merkel cell polyomavirus (MCPyV) in skin lesions of patients with Merkel cell carcinoma (MCC). METHODS: MCPyV was quantified using quantitative Real-Time-PCR (qRT-PCR) in 34 paraffinized MCC samples (resected/biopsied) originally taken between 1977 and 2015, and 6 non-MCC samples. RESULTS: In 31 (91.2%) MCC-individuals, MCPyV was detected. No virus was observed in any non-MCC tumour. Average age at diagnosis was 78...
July 6, 2017: Journal of Medical Virology
https://www.readbyqxmd.com/read/28679298/prevalence-of-cutaneous-viral-infections-in-incident-cutaneous-squamous-cell-carcinoma-detected-among-chronic-lymphocytic-leukemia-and-hematopoietic-stem-cell-transplant-patients
#6
Shalaka S Hampras, Frederick L Locke, Julio C Chavez, Nishit S Patel, Anna R Giuliano, Kyle Miller, Tarik Gheit, Massimo Tommasino, Dana E Rollison
The role of cutaneous viral infections in the development of non-melanoma skin cancer (NMSC), including cutaneous squamous cell carcinoma (SCC), among chronic lymphocytic leukemia (CLL) and blood and marrow transplant (BMT) patients is not established. CLL (n = 977) and BMT (n = 3587) patients treated at the Moffitt Cancer Center were included in a retrospective cohort study. Human papillomavirus (HPV) and human polyomavirus (HPyV) DNA were examined in a subset of incident SCC tumors. Five-year cumulative incidence of NMSC was 1...
July 6, 2017: Leukemia & Lymphoma
https://www.readbyqxmd.com/read/28667764/human-polyomavirus-9-in-immunocompromised-patients-in-the-university-hospital-in-hradec-kralove-czech-republic
#7
Fajfr Miroslav, Pliskova Lenka, Kutova Radka, Matyskova-Kubisova Michaela, Navratil Pavel, Radocha Jakub, Valenta Zbynek, Dusilova-Sulkova Sylvie
INTRODUCTION: Human polyomaviruses such as JC polyomavirus and BK polyomavirus have long been well known pathogens of immunocompromised patients. Several new members of this viral family have been described during the last decade. Human polyomavirus 9 seems to be a novel pathogen of transplanted patients according to some studies. The study aim: The aim of our study was to determine the presence of human polyomavirus 9 in patients after kidney or stem cell transplantation at the University Hospital in Hradec Kralove, Czech Republic...
July 1, 2017: Journal of Medical Virology
https://www.readbyqxmd.com/read/28665480/simultaneous-pancreas-kidney-transplant-recipients-are-predisposed-to-tissue-invasive-cytomegalovirus-disease-and-concomitant-infectious-complications
#8
Thomas Schachtner, Marina Zaks, Natalie M Otto, Andreas Kahl, Petra Reinke
BACKGROUND: Infections have increased in simultaneous pancreas/kidney transplant recipients (SPKTRs) with cytomegalovirus (CMV) infection being the most important viral infection with adverse impact on patient and allograft outcomes. METHODS: We studied all primary SPKTRs and deceased-donor kidney transplant recipients (KTRs) between 2008 and 2015 for the development of CMV infection. 21/62 SPKTRs (33.9%) and 90/335 KTRs (26.9%) were diagnosed with CMV infection...
June 30, 2017: Transplant Infectious Disease: An Official Journal of the Transplantation Society
https://www.readbyqxmd.com/read/28663292/identification-of-a-second-raccoon-associated-polyomavirus
#9
Eileen M Geoghegan, Nicole L Welch, Michael J Yabsley, Molly E Church, Patricia A Pesavento, Christopher B Buck
Raccoon polyomavirus 1 (RacPyV1) is the suspected cause of an outbreak of fatal brain tumors among raccoons (Procyon lotor) in the western United States. Spleen samples from Georgia raccoons were screened for polyomaviruses. Although RacPyV1 was not detected, a previously unknown polyomavirus, which we designate RacPyV2, was identified and sequenced.
June 29, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28661003/no-detection-of-merkel-cell-polyomavirus-in-oral-lichen-planus-results-of-a-preliminary-study-in-a-french-cohort-of-patients
#10
M Masson Regnault, E Vigarios, F Projetti, B Herbault-Barres, E Tournier, L Lamant, V Sibaud
Oral lichen planus (OLP) is a chronic inflammatory disease considered as a CD8+ T lymphocyte-mediated autoimmune reaction, which may be triggered by undetermined virus. Recent reports have described the detection of Merkel Cell polyomavirus (MCPyV) DNA in oral samples from healthy patients and in patients withdifferent forms of oral cancers. We therefore investigated in a prospective way whether MCPyV was detectable in oral lesions of patients with active OLP. Our preliminary results do not support the hypothesis that OLP may be triggered by MCPyV infection...
June 29, 2017: Journal of Medical Virology
https://www.readbyqxmd.com/read/28656581/optimization-of-sampling-strategy-to-determine-pathogen-removal-efficacy-of-activated-sludge-treatment-plant
#11
Jatinder P S Sidhu, Warish Ahmed, Andrew Palmer, Kylie Smith, Leonie Hodgers, Simon Toze
Large-scale wastewater schemes rely on multi-barrier approach for the production of safe and sustainable recycled water. In multi-barrier wastewater reclamation systems, conventional activated sludge process (ASP) often constitutes a major initial treatment step. The main aim of this research was to determine most appropriate sampling approach to establish pathogen removal efficacy of ASP. The results suggest that ASP is capable of reducing human adenovirus (HAdV) and polyomavirus (HPyV) by up to 3 log10. The virus removal data suggests that HAdV removal is comparable to somatic bacteriophage belonging to Microviridae family...
June 28, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28655392/outcome-of-polyomavirus-nephropathy-in-renal-transplant-patients-a-single-center-experience
#12
Nika Kojc, Andreja Aleš Rigler, Gregor Mlinšek, Damjan Kovač, Dušan Ferluga, Miha Arnol
BACKGROUND: Reduction of immunosuppression is a common therapeutic strategy in patients with polyomavirus nephropathy (PVN) but may be associated with acute rejection. This study aimed to evaluate the morphology of PVN in renal biopsies after reduction of immunosuppression. METHODS: Eight of 241 patients who received a kidney transplant between January 2012 and December 2015 presented with BK viremia and biopsy-proven PVN. Morphological evaluation according to Banff criteria and correlation with viremia and kidney function after immunosuppression reduction was performed...
June 28, 2017: Clinical Nephrology
https://www.readbyqxmd.com/read/28654466/detection-of-beta-human-papillomavirus-in-a-child-with-polyomavirus-associated-trichodysplasia-spinulosa
#13
Pooja Kadam, Teddy Pan, Rachelle Gates, Jessica Rivetz, Peter Rady, Stephen Tyring, John A Carlson
Viral associated trichodysplasia spinulosa (VATS) is a rare cutaneous eruption characterized by folliculocentric papules, keratin spicules, and alopecia associated with trichodysplasia spinulosa-associated polyomavirus (TSPyV) infection. We report a case of a 6-year-old male child who presented with a generalized papular eruption during chemotherapy for acute lymphoblastic leukemia. The papules were tested for human papillomavirus (HPV) DNA by nested polymerase chain reaction (PCR) and TSPyV using PCR and gene sequencing studies...
June 20, 2017: American Journal of Dermatopathology
https://www.readbyqxmd.com/read/28650084/detection-of-human-polyomaviruses-jc-and-bk-in-liver-pre-transplant-patients
#14
Marilia A Figueiredo, Maria Cristina Domingues Fink, Talita Castro, Paulo Henrique Braz-Silva, Jeanne Carla Steffens, Fernanda de Paula Eduardo, Marina Gallottini, Karem L Ortega
OBJECTIVE: This study aimed to identify and quantify polyomaviruses (BKPyV and JCPyV) in the saliva, mouthwash, blood and urine of liver pre-transplant patients. MATERIALS & METHODS: A case-control study was performed using a convenience sample of 21 end-stage liver disease patients (EG = experimental group) and 20 normoreactive controls (CG = control group). In total, 162 samples were collected. Detection and quantification of polyomaviruses were performed by using real-time PCR method...
June 26, 2017: Oral Diseases
https://www.readbyqxmd.com/read/28647211/tubuloreticular-inclusions-in-peritubular-capillaries-of-renal-allografts
#15
Jee Youn Lee, Seung Hwan Song, Yu Seun Kim, Beom Jin Lim, Soon Il Kim, Myoung Soo Kim, Hyeon Joo Jeong
BACKGROUND: Tubuloreticular inclusions (TRIs) are anastomosing networks of microtubules that are frequently found in autoimmune diseases and viral infections. In renal allografts, TRIs have been reported in glomerular endothelial cells in association with viral infections and donor specific antibodies (DSAs), but their presence in peritubular capillaries has not been explored. METHODS: We collected seven cases with TRIs out of 148 consecutive renal allograft biopsies taken from Dec...
June 6, 2017: Pathology, Research and Practice
https://www.readbyqxmd.com/read/28640744/ictv-virus-taxonomy-profile-polyomaviridae
#16
Ugo Moens, Sébastien Calvignac-Spencer, Chris Lauber, Torbjörn Ramqvist, Mariet C W Feltkamp, Matthew D Daugherty, Ernst J Verschoor, Bernhard Ehlers, Ictv Report Consortium
The Polyomaviridae is a family of small, non-enveloped viruses with circular dsDNA genomes of approximately 5 kbp. The family includes four genera whose members have restricted host range, infecting mammals and birds. Polyomavirus genomes have also been detected recently in fish. Merkel cell polyomavirus and raccoon polyomavirus are associated with cancer in their host; other members are human and veterinary pathogens. Clinical manifestations are obvious in immunocompromised patients but not in healthy individuals...
June 2017: Journal of General Virology
https://www.readbyqxmd.com/read/28639520/polyomavirus-associated-prostatitis-in-wistar-han-rats-following-immunosuppression-in-a-chronic-toxicity-study
#17
Katherine Masek-Hammerman, Thomas P Brown, Walter F Bobrowski, Lindsay Tomlinson, Marie Debrue, Laurence Whiteley, Zaher Radi
Chronic prostatitis characterized on light microscopic examination by moderate, multifocal, predominantly lymphocytic inflammation associated with epithelial atypia and intranuclear and cytoplasmic inclusion-like material was identified in the prostate gland of 2 Wistar Han rats administered an immunomodulatory test article in a 6-month chronic toxicity study. Transmission electron microscopy of the prostate glands identified 45-nm, nonenveloped, icosahedral virions arranged in paracrystalline array within the cell nuclei in 1 of the 2 rats...
January 1, 2017: Toxicologic Pathology
https://www.readbyqxmd.com/read/28638849/refractory-t-cell-anergy-and-rapidly-fatal-progressive-multifocal-leukoencephalopathy-after-prolonged-ctla4-therapy
#18
Manon Dekeyser, Marie-Ghislaine de Goër de Herve, Houria Hendel-Chavez, Céline Labeyrie, David Adams, Ghaïdaa Adebs Nasser, Jacques Gasnault, Antoine Durrbach, Yassine Taoufik
Progressive multifocal leukoencephalopathy (PML) is a deadly demyelinating disease due to central nervous system replication of the human polyomavirus JC virus (JCV) in immunosuppressed patients. The only effective therapeutic approach is to restore anti-JCV T-cell responses. In this study, we describe a case of rapidly fatal PML with JCV T-cell anergy in a renal transplant patient treated with CTLA4-Ig (belatacept, a CD28-B7 costimulation blocker and T-cell anergy inducer). T-cell anergy could not be reversed despite several therapeutic approaches...
2017: Open Forum Infectious Diseases
https://www.readbyqxmd.com/read/28637388/progressive-multifocal-leukoencephalopathy-endemic-viruses-and-lethal-brain-disease
#19
Sheila A Haley, Walter J Atwood
In 1971, the first human polyomavirus was isolated from the brain of a patient who died from a rapidly progressing demyelinating disease known as progressive multifocal leukoencephalopathy. The virus was named JC virus after the initials of the patient. In that same year a second human polyomavirus was discovered in the urine of a kidney transplant patient and named BK virus. In the intervening years it became clear that both viruses were widespread in the human population but only rarely caused disease. The past decade has witnessed the discovery of eleven new human polyomaviruses, two of which cause unusual and rare cancers...
June 21, 2017: Annual Review of Virology
https://www.readbyqxmd.com/read/28634106/biology-evolution-and-medical-importance-of-polyomaviruses-an-update
#20
REVIEW
Ugo Moens, Andi Krumbholz, Bernhard Ehlers, Roland Zell, Reimar Johne, Sébastien Calvignac-Spencer, Chris Lauber
The family Polyomaviridae encompasses non-enveloped viruses with a circular dsDNA genome that is typically approximately 5000bp in length. Originally isolated from mammals, polyomavirus sequences have now been detected in invertebrates, fish, amphibians, reptiles and birds, although it remains to be determined whether all these animals are genuine hosts. The genomes of all polyomaviruses encode at least two regulatory proteins (large and small tumour antigen) and two structural proteins (capsid proteins VP1 and VP2) whose functions have been defined...
June 17, 2017: Infection, Genetics and Evolution
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