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https://www.readbyqxmd.com/read/29451655/human-polyomavirus-infection-cytological-and-molecular-diagnosis
#1
Patricia Gioia de Assis, Maria da Glória da Costa Carvalho
Few studies directly compare urinary cytology with molecular methods for detecting BK and JC polyomaviruses. Reactivation of BKV infection is the main risk factor for the development of nephropathy in immunocompromised individuals. The limitation of the cytological method can be attributed to the stage where the infected cell does not have specific and sufficient morphological characteristics for a conclusive diagnosis and can be easily interpreted as degenerative alteration. Moreover, morphologically, it is not possible to differentiate the two types of viruses...
November 2017: Revista da Associação Médica Brasileira
https://www.readbyqxmd.com/read/29414185/prevalence-and-stability-of-antibodies-to-thirteen-polyomaviruses-and-association-with-cutaneous-squamous-cell-carcinoma-a-population-based-study
#2
Annika Antonsson, Rachel E Neale, Peter O'Rourke, Leesa Wockner, Angelika Michel, Michael Pawlita, Tim Waterboer, Adèle C Green
BACKGROUND: Several new members of the human polyomavirus (HPyV) family that infect human skin and are potentially oncogenic have been identified in the last decade. OBJECTIVES: To investigate prospectively the seroprevalence and stability of 13 PyVs, and possible associations with different risk factors and cutaneous squamous cell carcinoma (cSCC). STUDY DESIGN: In this Australian population-based longitudinal study sera were collected at baseline in 1992 or during the next 4 years from 688 people...
January 30, 2018: Journal of Clinical Virology: the Official Publication of the Pan American Society for Clinical Virology
https://www.readbyqxmd.com/read/29411124/malignancy-and-chemotherapy-induced-haemophagocytic-lymphohistiocytosis-in-children-and-adolescents-a-single-centre-experience-of-20%C3%A2-years
#3
Volker Strenger, Gerald Merth, Herwig Lackner, Stephan W Aberle, Harald H Kessler, Markus G Seidel, Wolfgang Schwinger, Daniela Sperl, Petra Sovinz, Anna Karastaneva, Martin Benesch, Christian Urban
Haemophagocytic lymphohistiocytosis (HLH) is a possibly life-threatening syndrome of immune dysregulation and can be divided into primary (hereditary) and secondary forms (including malignancy-associated HLH (M-HLH)). We retrospectively analysed epidemiological, clinical, virological and laboratory data from patients with M-HLH treated at our department between 1995 and 2014. Out of 1.706 haemato-/oncologic patients treated at our department between 1995 and 2014, we identified 22 (1.29%) patients with secondary HLH (1...
February 6, 2018: Annals of Hematology
https://www.readbyqxmd.com/read/29315820/de-novo-donor-specific-antibody-following-bk-nephropathy-the-incidence-and-association-with-antibody-mediated-rejection
#4
Wisit Cheungpasitporn, Walter K Kremers, Elizabeth Lorenz, Hatem Amer, Fernando G Cosio, Mark D Stegall, Manish J Gandhi, Carrie A Schinstock
BACKGROUND AND OBJECTIVES: The risk of de novo donor-specific antibody (dnDSA) development following BK viremia (BKV) or nephropathy (BKN) after kidney transplant remains unclear. We aimed to evaluate the relationships among dnDSA, BKV (BK blood PCR >15,000 copies), BKN, antibody mediated rejection (AMR) and allograft loss. PATIENTS AND METHODS: We performed a retrospective cohort study of 904 solitary kidney transplant recipients transplanted between 10/2007 and 5/2014...
January 8, 2018: Clinical Transplantation
https://www.readbyqxmd.com/read/29312862/polyoma-virus-nephropathy-in-kidney-transplantation
#5
REVIEW
Jacob Rw Scadden, Adnan Sharif, Kassi Skordilis, Richard Borrows
BK virus (BKV) is a polyomavirus that is able to cause renal dysfunction in transplanted grafts via BK virus-associated nephritis (BKVAN). This condition was mis-diagnosed in the past due to clinical and histopthological similarities with acute rejection. Due to the prevalence of the virus in the population, it is an important pathogen in this context, and so it is important to understand how this virus functions and its' relationship with the pathogenesis of BKVN. Screening for BKV often reveals viruria and/or viremia, which then manifests as BKVN, which can be asymptomatic or result in clinical features namely renal dysfunction...
December 24, 2017: World Journal of Transplantation
https://www.readbyqxmd.com/read/29277885/different-strains-of-bk-polyomavirus-vp1-sequences-in-a-group-of-iranian-prostate-cancer-patients
#6
Maryam Vaezjalali, Helia Azimi, Seyed Masoud Hosseini, Afsoon Taghavi, Hossein Goudarzi
PURPOSE: BK virus (BKV) has a worldwide seroprevalence in humans. Based on sequences of the major capsid proteins, i.e. viral protein 1 (VP1), there are four BKV genotypes. Each genotype has its own subtypes, and wasshown to be circulating independently in the human population. The aim of this study was to determine BKVgenotypes and subtypes among Iranian patients with prostatic cancer, benign prostatic hyperplasia, and kidney transplantation. MATERIALS AND METHODS: BKV DNA was extracted from prostatic cancers and benign prostatic hyperplasia blocks and also urine of kidney transplantation patients...
December 25, 2017: Urology Journal
https://www.readbyqxmd.com/read/29222360/antiviral-treatment-of-bk-virus-viremia-after-kidney-transplantation
#7
REVIEW
Andrew D Santeusanio, Benjamin E Lukens, Judy Eun
PURPOSE: The various antiviral treatment options in the management of BK virus (BKV) viremia and BKV-associated nephropathy (BKVAN) are reviewed. SUMMARY: Review of the PubMed database from 1990 to 2016 for all English language case series, cohort studies, and randomized controlled trials detailing antiviral treatment of BKV viremia or BKVAN in kidney transplant recipients returned only 16 published reports. The majority of these reports were based on small case series or protocol-based cohort studies, with no prospective head-to-head data and only modest benefit reported for cidofovir, leflunomide, i...
December 15, 2017: American Journal of Health-system Pharmacy: AJHP
https://www.readbyqxmd.com/read/29106916/bk-polyomavirus-genotypes-ia-and-ib1-exhibit-different-biological-properties-in-renal-transplant-recipients
#8
Rafael B Varella, Ana Carolina J Zalona, Nuria C Diaz, Mariano G Zalis, Guilherme Santoro-Lopes
BK polyomavirus (BKV) is an opportunist agent associated with nephropathy (BKVAN) in 1-10% of kidney transplant recipients. BKV is classified into genotypes or subgroups according to minor nucleotidic variations with unknown biological implications. Studies assessing the possible association between genotypes and the risk of BKVAN in kidney transplant patients have presented conflicting results. In these studies, genotype Ia, which is highly prevalent in Brazil, was less frequently found and, thus, comparative data on the biological properties of this genotype are lacking...
October 26, 2017: Virus Research
https://www.readbyqxmd.com/read/29104861/graft-loss-among-renal-transplant-recipients-with-early-reduction-of-immunosuppression-for-bk-viremia
#9
Marwan M Azar, Roland Assi, Aziz K Valika, David B Banach, Isaac E Hall, Marie-Louise Landry, Maricar F Malinis
AIM: To review the incidence of graft loss and acute rejection among renal transplant recipients with early reduction of immunosuppression for BK viremia. METHODS: We performed a retrospective analysis of consecutive de-novo kidney-only transplants from January 2009 to December 2012 to evaluate the incidence of Polyoma-virus associated nephropathy (PyVAN). Recipient plasma was screened for BKV DNA via quantitative polymerase chain reaction (PCR) at months 1, 3, 6, 9 and 12 post-transplant and on worsening graft function...
October 24, 2017: World Journal of Transplantation
https://www.readbyqxmd.com/read/29099505/histological-findings-and-lung-dust-analysis-as-the-basis-for-occupational-disease-compensation-in-asbestos-related-lung-cancer-in-germany
#10
Inke Sabine Feder, Anja Theile, Andrea Tannapfel
OBJECTIVES: This study has researched the significance of histologically raised findings and lung dust analyses in the context of claiming the recognition of and thus compensation for an asbestos-associated occupational disease. MATERIAL AND METHODS: For this approach, all findings from the German Mesothelioma Register in 2015 that included lung dust analyses were evaluated and were compared with information on asbestos fiber exposure at work based on fiber years, and with the results of radiological findings...
November 2, 2017: International Journal of Occupational Medicine and Environmental Health
https://www.readbyqxmd.com/read/29064575/dna-detection-of-jc-and-bk-virus-in-archival-urine-cytospin-slides
#11
Patricia Gioia de Assis, Carlos Eduardo de Souza Carvalho, Marcelo Soares da Mota E Silva, Maria da Gloria da Costa Carvalho
INTRODUCTION: To identify decoy cells, cytological examination was performed in urine cytospin slides. Decoy cells are related to Polyomaviruses (JC virus [JCV] and BK virus [BKV]), which are recognized worldwide due to potential infection and morbidity in kidney transplantrecipients. Cytologically, it is difficult to evaluate the cytopathic effect of JC and BK virus in urine of patients with urothelial neoplasia. For this reason, there is a need for molecular approaches. OBJECTIVE: To evaluate the incidence of BKV and JCV DNA in archival slides of urine cytospin material with benign and malignant characteristics...
October 24, 2017: Journal of Medical Virology
https://www.readbyqxmd.com/read/29064181/a-mayo-clinic-13-year-investigation-of-the-syndrome-of-rapid-onset-esrd-among-renal-transplant-recipients-an-analysis-of-the-implications-of-renal-allograft-biopsy-results
#12
REVIEW
Macaulay Amechi Onuigbo, Nneoma Agbasi
INTRODUCTION: We first described the syndrome of rapid onset end stage renal disease (SORO-ESRD), acute yet irreversible renal failure, in 2010. OBJECTIVE: The impact of SORO-ESRD renal allograft survival remains speculative and we plan to study this question. METHODS: A retrospective analysis of individual adult patient-level serum creatinine trajectories of ESRD patients on maintenance hemodialysis for >90 days at Mayo Clinic, Rochester, 2001-2013...
October 2017: Hemodialysis International
https://www.readbyqxmd.com/read/29042457/neutralizing-antibody-mediated-response-and-risk-of-bk-virus-associated-nephropathy
#13
Morgane Solis, Aurélie Velay, Raphaël Porcher, Pilar Domingo-Calap, Eric Soulier, Mélanie Joly, Mariam Meddeb, Wallys Kack-Kack, Bruno Moulin, Siamak Bahram, Françoise Stoll-Keller, Heidi Barth, Sophie Caillard, Samira Fafi-Kremer
BK virus-associated nephropathy (BKVAN) causes renal allograft dysfunction. The current management of BKVAN relies on pre-emptive adaptation of immunosuppression according to viral load monitoring. However, this empiric strategy is not always successful. Therefore, pretransplant predictive markers are needed. In a prospective longitudinal study, we enrolled 168 kidney transplant recipients and 69 matched donors. To assess the value of BKV genotype-specific neutralizing antibody (NAb) titers as a predictive marker for BKV replication, we measured BKV DNA load and NAb titers at transplant and followed patients for 24 months...
January 2018: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/29032062/virus-specific-t-cells-broadening-applicability
#14
REVIEW
A John Barrett, Susan Prockop, Catherine M Bollard
Virus infection remains an appreciable cause of morbidity and mortality after hematopoietic stem cell transplantation (HSCT). Although pharmacotherapy and/or antibody therapy may help prevent or treat viral disease, these drugs are expensive, toxic, and often ineffective due to primary or secondary resistance. Further, effective treatments are limited for many infections (eg, adenovirus, BK virus), which are increasingly detected after alternative donor transplants. These deficiencies in conventional therapeutics have increased interest in an immunotherapeutic approach to viral disorders, leading to adoptive transfer of virus-specific cytotoxic T lymphocytes (VSTs), which can rapidly reconstitute antiviral immunity post-transplantation without causing graft-versus-host disease...
October 12, 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/29020348/kinetics-of-double-stranded-dna-viremia-after-allogeneic-hematopoietic-cell-transplantation
#15
Joshua A Hill, Bryan T Mayer, Hu Xie, Wendy M Leisenring, Meei-Li Huang, Terry Stevens-Ayers, Filippo Milano, Colleen Delaney, Keith R Jerome, Danielle M Zerr, Garrett Nichols, Michael Boeckh, Joshua T Schiffer
Background: Improved understanding of double stranded DNA (dsDNA) virus kinetics after hematopoietic cell transplantation (HCT) would facilitate development of therapeutic strategies. Methods: We tested weekly plasma samples from 404 patients through day 100 after allogeneic HCT for cytomegalovirus (CMV), human herpesvirus 6B (HHV-6B), HHV-6A, BK polyomavirus (BKV), adenovirus (AdV), and Epstein-Barr virus (EBV) using quantitative PCR. Episodes lasting ≤1 week were defined as blips and >1 week as persistent...
September 9, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28980390/treatment-for-presumed-bk-polyomavirus-nephropathy-and-risk-of-urinary-tract-cancers-among-kidney-transplant-recipients-in-the-united-states
#16
Gaurav Gupta, Sarat Kuppachi, Roberto S Kalil, Christopher B Buck, Charles F Lynch, Eric A Engels
Recent case series describe detection of BK polyomavirus (BKV) in urinary tract cancers in kidney transplant recipients, suggesting that BKV could contribute to the development of these cancers. We assessed risk for urinary tract cancers in kidney recipients with or without treatment for presumed BKV nephropathy (tBKVN) using data from the United States Transplant Cancer Match Study (2003-2013). Among 55 697 included recipients, 2015 (3.6%) were reported with tBKVN. Relative to the general population, incidence was similarly elevated (approximately 4...
January 2018: American Journal of Transplantation
https://www.readbyqxmd.com/read/28954487/occurrence-of-bk-virus-and-human-papilloma-virus-in-colorectal-cancer
#17
Adrian Jarzyński, Przemysław Zając, Remigiusz Żebrowski, Anastazja Boguszewska, Małgorzata Polz-Dacewicz
INTRODUCTION AND OBJECTIVE: Colorectal cancer is one of the most common cancers worldwide. In Poland, it is the second most common cancer, regardless of gender. The aim of study was to analyze the incidence of HPV and BKV in the tissue of colorectal cancer and to determine the relationship between the presence of these viruses and the development of this cancer. MATERIAL AND METHODS: The experiments were conducted using 50 colorectal cancer tissues collected from histological sections...
September 21, 2017: Annals of Agricultural and Environmental Medicine: AAEM
https://www.readbyqxmd.com/read/28942429/increased-incidence-of-bk-virus-viraemia-among-patients-undergoing-chronic-haemodialysis-a-case-control-study
#18
Samer Fuad Swedan
AIMS: Incidence of BK virus (BKV) viraemia, a major risk factor for nephropathy, among patients undergoing chronic haemodialysis remains poorly investigated. This case-control study evaluated the risk of infection by BKV, in addition to hepatitis C virus (HCV) among haemodialysis subjects (n=100), compared with age-matched controls (n=100). METHODS: Subjects' blood plasma samples were subjected to nucleic acid extraction, followed by real-time PCR to evaluate viraemia by BKV and HCV, while sera samples were subjected to ELISA, to identify IgG seropositivity for HCV...
September 23, 2017: Journal of Clinical Pathology
https://www.readbyqxmd.com/read/28927823/t-cell-therapies-for-human-polyomavirus-diseases
#19
REVIEW
Sarah I Davies, Pawel Muranski
Rapid restoration of virus-specific T immunity via adoptive transfer of ex vivo generated T cells has been proven as a powerful therapy for patients with advanced cancers and refractory viral infections such as cytomegalovirus (CMV) and Epstein-Barr virus (EBV). BK virus (BKV), John Cunningham virus (JCV), and Merkel cell carcinoma virus (MCV) are the members of the rapidly growing human polyomavirus (hPyV) family that commonly infects most healthy humans. These viruses have a clearly established potential for causing severe end-organ damage or malignant transformation, especially in individuals with weakened immunity who are unable to mount or regain endogenous T-cell responses as a result of underlying leukemia or iatrogenic immunosuppression in autoimmunity, bone marrow and solid organ transplant settings...
September 15, 2017: Cytotherapy
https://www.readbyqxmd.com/read/28923623/mycophenolate-mofetil-withdrawal-with-conversion-to-everolimus-to-treat-bk-virus-infection-in-kidney-transplant-recipients
#20
D Wojciechowski, S Chandran, A Webber, R Hirose, F Vincenti
BACKGROUND: BK virus (BKV) is a significant post-transplant infection. Mammalian target of rapamycin inhibitors (mTORis) reduce BKV large T antigen expression in vitro and are associated with lower rates of BKV infection when used as de novo immunosuppression in clinical studies. METHODS: We performed a prospective, single-center, randomized, open label pilot trial to evaluate the impact of mycophenolate mofetil (MMF) withdrawal with conversion to the mTORi everolimus versus a 50% reduction of the MMF dose for the treatment of BKV infection after kidney transplantation...
October 2017: Transplantation Proceedings
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