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https://www.readbyqxmd.com/read/29143415/severe-bk-polyomavirus-induced-hemorrhagic-cystitis-in-a-kidney-transplant-recipient-with-absence-of-renal-allograft-involvement
#1
Mahwash Kamal, Amit Govil, Manish Anand, Bassam G Abu Jawdeh, Silvi Shah
BK polyomavirus mostly manifests as polyomavirus-associated nephropathy (PyVAN) in kidney transplant patients and polyoma virus-associated hemorrhagic cystitis (PyVHC) in bone marrow transplant patients. PyVHC in kidney transplant patients is only reported in four cases in the literature. Our patient had severe hemorrhagic cystitis without renal involvement. We postulate that our patient's exposure to ifosfamide and radiation 8 years prior transplantation might pre-dispose him to this disease. This article is protected by copyright...
November 16, 2017: Transplant Infectious Disease: An Official Journal of the Transplantation Society
https://www.readbyqxmd.com/read/29104861/graft-loss-among-renal-transplant-recipients-with-early-reduction-of-immunosuppression-for-bk-viremia
#2
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/29055440/merkel-cell-carcinoma-with-fingolimod-treatment-for-multiple-sclerosis-a-case-report
#3
Kedar R Mahajan, Jennifer S Ko, Michael T Tetzlaff, Courtney W Hudgens, Steven D Billings, Jeffrey A Cohen
Neoplasms and reactivation of latent viruses have been observed in individuals taking fingolimod. Merkel cell carcinoma (MCC), a rare neuroendocrine skin cancer, is associated with immunosuppression and can be triggered by the oncogenic Merkel cell polyoma virus (MCPyV). We report a case of a 61-year-old man with multiple sclerosis who developed MCPyV-positive MCC 4 years after starting fingolimod. This is the second report of MCC associated with MCPyV in an individual on fingolimod.
October 2017: Multiple Sclerosis and related Disorders
https://www.readbyqxmd.com/read/29044559/discovery-and-characterization-of-novel-trans-spliced-products-of-human-polyoma-jc-virus-late-transcripts-from-pml-patients
#4
A Sami Saribas, Julia DeVoto, Akhil Golla, Hassen S Wollebo, Martyn K White, Mahmut Safak
Although the human neurotropic polyomavirus, JC virus (JCV), was isolated almost a half century ago, understanding the molecular mechanisms governing its biology remains highly elusive. JCV infects oligodendrocytes and astrocytes in the central nervous system (CNS) and causes a fatal brain disease known as progressive multifocal leukoencephalopathy (PML) in immunocompromised individuals including AIDS. It has a small circular DNA genome (∼ 5 kb) and generates two primary transcripts from its early and late coding regions, producing several predicted alternatively spliced products mainly by cis-splicing...
October 16, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28984642/viral-infections-in-solid-organ-transplant-recipients-novel-updates-and-a-review-of-the-classics
#5
Ghady Haidar, Nina Singh
PURPOSE OF REVIEW: To summarize new discoveries in viral pathogenesis and novel therapeutic and prophylactic strategies in organ transplant recipients. RECENT FINDINGS: For decades, prophylaxis of cytomegalovirus (CMV) has been the standard preventive strategy, but new clinical trials are expected to determine the advantages of preemptive therapy over prophylaxis. Novel anti-CMV agents, such as maribavir and letermovir, are being studied for the treatment of resistant/refractory CMV as alternatives to foscarnet and cidofovir...
December 2017: Current Opinion in Infectious Diseases
https://www.readbyqxmd.com/read/28984299/medical-renal-diseases-are-frequent-but-often-unrecognized-in-adult-autopsies
#6
Marie E Perrone, Anthony Chang, Kammi J Henriksen
Kidney diseases affect many hospitalized patients and contribute to morbidity and mortality. Therefore, kidney disease should be prevalent, but the frequency and spectrum of medical renal pathology in autopsy specimens has not been well documented. We sought to determine the spectrum of medical renal pathology in adult autopsy specimens and the frequency of overlooked diagnoses. We reviewed the hematoxylin- and eosin-stained kidney sections from 140 adult autopsies performed at a large teaching hospital over a 2-year period...
October 6, 2017: Modern Pathology: An Official Journal of the United States and Canadian Academy of Pathology, Inc
https://www.readbyqxmd.com/read/28947147/differentiation-of-minute-virus-of-mice-and-mouse-parvovirus-by-high-resolution-melting-curve-analysis
#7
Dan Rao, Miaoli Wu, Jing Wang, Wen Yuan, Yujun Zhu, Feng Cong, Fengjiao Xu, Yuexiao Lian, Bihong Huang, Qiwen Wu, Meili Chen, Yu Zhang, Ren Huang, Pengju Guo
Murine parvovirus is one of the most prevalent infectious pathogens in mouse colonies. A specific primer pair targeting the VP2 gene of minute virus of mice (MVM) and mouse parvovirus (MPV) was utilized for high resolution melting (HRM) analysis. The resulting melting curves could distinguish these two virus strains and there was no detectable amplification of the other mouse pathogens which included rat parvovirus (KRV), ectromelia virus (ECT), mouse adenovirus (MAD), mouse cytomegalovirus (MCMV), polyoma virus (Poly), Helicobactor hepaticus (H...
September 23, 2017: Journal of Virological Methods
https://www.readbyqxmd.com/read/28881673/bromodomain-inhibition-shows-antitumoral-activity-in-mice-and-human-luminal-breast-cancer
#8
Montserrat Pérez-Salvia, Laia Simó-Riudalbas, Pere Llinàs-Arias, Laura Roa, Fernando Setien, Marta Soler, Manuel Castro de Moura, James E Bradner, Eva Gonzalez-Suarez, Catia Moutinho, Manel Esteller
BET bromodomain inhibitors, which have an antitumoral effect against various solid cancer tumor types, have not been studied in detail in luminal breast cancer, despite the prevalence of this subtype of mammary malignancy. Here we demonstrate that the BET bromodomain inhibitor JQ1 exerts growth-inhibitory activity in human luminal breast cancer cell lines associated with a depletion of the C-MYC oncogene, but does not alter the expression levels of the BRD4 bromodomain protein. Interestingly, expression microarray analyses indicate that, upon JQ1 administration, the antitumoral phenotype also involves downregulation of relevant breast cancer oncogenes such as the Breast Carcinoma-Amplified Sequence 1 (BCAS1) and the PDZ Domain-Containing 1 (PDZK1)...
August 1, 2017: Oncotarget
https://www.readbyqxmd.com/read/28800720/jc-virus-related-progressive-multifocal-leukoencephalopathy-after-living-donor-liver-transplant-a-rare-case
#9
Archana Rastogi, Natasha Gulati, Chhagan Bihari, Ashok Chaudhary, Kalpana Bansal, Shridhar Sasturkar, Shalini Thapar, Viniyendra Pamecha
Progressive multifocal leukoencephalopathy caused by polyoma JC virus is a rare and severe demyelinating disease of the central nervous system. It occurs in immunocompromised patients and is scarcely reported in liver transplant recipients. Brain biopsy demonstrating demyelination with presence of foamy macrophages, relative preservation of axons, astrogliosis, and typical polyomavirus inclusions in the enlarged oligodendroglial nuclei is essential for diagnosis. Here, we report a case of JC virus-associated progressive multifocal leukoencephalopathy in a living-donor liver transplant recipient who was transplanted for hepatitis C virus-related decompensated cirrhosis...
August 12, 2017: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/28702160/bk-virus-associated-hemorrhagic-cystitis-in-patients-with-allogeneic-hematopoietic-cell-transplantation-report-of-three-cases
#10
Duygu Mert, Hikmetullah Batgi, Alparslan Merdin, Sabahat Çeken, Mehmet Sinan Dal, Emre Tekgündüz, Fevzi Altuntaş, Mustafa Ertek
BK viras is a human polyoma viras. It is acquired in early childhood and remains life-long latent in the genitourinary system. BK virus replication is more common in receiving immunosuppressive therapy receiving patients and transplant patients. BK virus could cause hemorrhagic cystitis in patients with allogeneic stem cell transplantation. Hemorrhagic cystitis is a serious complication of hematopoietic stem cell transplantation. Hemorrhagic cystitis could cause morbidity and long stay in the hospital. Diagnosis is more frequently determined by the presence of BK virus DNA detected with quantitative or real-time PCR testing in serum or plasma and less often in urine...
June 1, 2017: Hematology Reports
https://www.readbyqxmd.com/read/28686294/nfat-regulated-cytokine-gene-expression-during-tacrolimus-therapy-early-after-renal-transplantation
#11
Sara Bremer, Nils T Vethe, Morten Skauby, Margrete Kasbo, Elisabet D Johansson, Karsten Midtvedt, Stein Bergan
AIMS: Despite pharmacokinetic monitoring of calcineurin inhibitors, the long-term outcome after transplantation (Tx) is still hampered by the side effects of these drugs. The aim of the present study was to characterize nuclear factor of activated T cells (NFAT)-regulated gene expression as a potential pharmacodynamic biomarker for further individualization of tacrolimus (Tac) therapy. METHODS: In 29 renal allograft recipients, samples were drawn once pre-Tx, and before and 1...
November 2017: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28624801/bromodomain-inhibition-shows-antitumoral-activity-in-mice-and-human-luminal-breast-cancer
#12
Montserrat Pérez-Salvia, Laia Simó-Riudalbas, Pere Llinàs-Arias, Laura Roa, Fernando Setien, Marta Soler, Manuel Castro de Moura, James E Bradner, Eva Gonzalez-Suarez, Catia Moutinho, Manel Esteller
BET bromodomain inhibitors, which have an antitumoral effect against various solid cancer tumor types, have not been studied in detail in luminal breast cancer, despite the prevalence of this subtype of mammary malignancy. Here we demonstrate that the BET bromodomain inhibitor JQ1 exerts growth-inhibitory activity in human luminal breast cancer cell lines associated with a depletion of the C-MYC oncogene, but does not alter the expression levels of the BRD4 bromodomain protein. Interestingly, expression microarray analyses indicate that, upon JQ1 administration, the antitumoral phenotype also involves downregulation of relevant breast cancer oncogenes such as the Breast Carcinoma-Amplified Sequence 1 (BCAS1) and the PDZ Domain-Containing 1 (PDZK1)...
May 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28576905/cmv-and-bkpyv-infections-in-renal-transplant-recipients-receiving-an-mtor-inhibitor-based-regimen-versus-a-cni-based-regimen-a-systematic-review-and-meta-analysis-of-randomized-controlled-trials
#13
Samir G Mallat, Bassem Y Tanios, Houssam S Itani, Tamara Lotfi, Ciaran McMullan, Steven Gabardi, Elie A Akl, Jamil R Azzi
BACKGROUND AND OBJECTIVES: The objective of this meta-analysis is to compare the incidences of cytomegalovirus and BK polyoma virus infections in renal transplant recipients receiving a mammalian target of rapamycin inhibitor (mTOR)-based regimen compared with a calcineurin inhibitor-based regimen. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS: We conducted a comprehensive search for randomized, controlled trials up to January of 2016 addressing our objective. Other outcomes included acute rejection, graft loss, serious adverse events, proteinuria, wound-healing complications, and eGFR...
August 7, 2017: Clinical Journal of the American Society of Nephrology: CJASN
https://www.readbyqxmd.com/read/28462542/clinical-profile-and-outcome-of-progressive-multifocal-leukoencephalopathy-in-hiv-infected-indian-patients
#14
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/28460546/an-update-on-chemical-pharmacotherapy-options-for-the-prevention-of-kidney-transplant-rejection-with-a-focus-on-costimulation-blockade
#15
REVIEW
Florian Kälble, Matthias Schaier, Sebastian Schäfer, Caner Süsal, Martin Zeier, Claudia Sommerer, Christian Morath
The introduction of calcineurin inhibitors (CNI) has greatly improved graft survival in the past three decades. However, long-term graft survival is still limited due to chronic allograft injury and side-effects of immunosuppressive medication. Areas covered: The present overview gives an update on pharmacotherapeutic strategies after kidney transplantation. The main focus is on CNI-sparing regimens using co-stimulatory blockade and on new substances on the horizone. Expert opinion: CNI sparing regimens are well-established...
June 2017: Expert Opinion on Pharmacotherapy
https://www.readbyqxmd.com/read/28405598/clearance-of-bk-virus-nephropathy-by-combination-antiviral-therapy-with-intravenous-immunoglobulin
#16
Kathy Kable, Carmen D Davies, Philip J O'connell, Jeremy R Chapman, Brian John Nankivell
BACKGROUND: Reactivation of BK polyoma virus causes a destructive virus allograft nephropathy (BKVAN) with graft loss in 46%. Treatment options are limited to reduced immunosuppression and largely ineffective antiviral agents. Some studies suggest benefit from intravenous immunoglobulin (IVIG). METHODS: We evaluated effectiveness of adjuvant IVIG to eliminate virus from blood and tissue, in a retrospective, single-center cohort study, against standard-of-care controls...
April 2017: Transplantation Direct
https://www.readbyqxmd.com/read/28399927/bk-viruria-and-viremia-in-children-with-systemic-lupus-erythematosus
#17
Nirupama Gupta, Cuong Q Nguyen, Renee F Modica, Melissa E Elder, Eduardo H Garin
BACKGROUND: BK virus (BKV) is a ubiquitous polyoma virus that lies dormant in the genitourinary tract once acquired in early childhood. In states of cellular immunodeficiency, the virus can reactivate to cause hemorrhagic cystitis and nephritis. Children with systemic lupus erythematosus (SLE) have an increased risk of developing infectious complications secondary to their immunocompromised state from the administration of several immuno-modulatory drugs. Currently, there are no data regarding the prevalence of BK viruria or viremia in children with SLE...
April 11, 2017: Pediatric Rheumatology Online Journal
https://www.readbyqxmd.com/read/28340807/prevalence-of-human-herpesvirus-8-and-bk-polyoma-virus-infections-in-end-stage-renal-disease-and-the-influence-of-renal-transplantation
#18
A Turkmen, O Guven, S Mese, A Agacfidan, B Yelken, M Onel, Y Caliskan, G Celik, S Turkoglu, B Kocak
Viral infections lead to significant morbidity and mortality in kidney transplant recipients. We evaluated 49 kidney transplant recipients for human herpesvirus 8 (HHV-8) and BK polyomavirus infections in conjunction with data obtained from 43 donors. The seroprevalence of HHV-8 was 6.9% in donors and 12.2% in recipients. HHV-8 DNA was detected below the limit of quantification (<5000 copies/mL) in a recipient with HHV-8 seropositivity at the pretransplant period and was undetectable at month 3 after transplantation...
April 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28295760/variability-in-assessing-for-bk-viremia-whole-blood-is-not-reliable-and-plasma-is-not-above-reproach-a-retrospective-analysis
#19
Neerja Agrawal, Ignacio A Echenique, Shane M Meehan, Ajit P Limaye, Linda Cook, Anthony Chang, Robert C Harland, Basit Javaid, Pradeep V Kadambi, Scott Matushek, James Williams, Michelle A Josephson
Polyomavirus nephropathy (PVN) is a major complication of kidney transplantation. Most reports describe polyomavirus viremia either precedes or is detectable at the time of diagnosis of PVN. This association is the basis of current screening recommendations. We retrospectively reviewed the PCR results of blood and urine samples from 29 kidney transplant recipients with biopsy-proven PVN. Biopsies were performed for a rise in serum creatinine or persistent high-level BK viruria. All biopsies showed polyoma virus large T-antigen expression in tubular epithelium using immunohistochemistry...
July 2017: Transplant International: Official Journal of the European Society for Organ Transplantation
https://www.readbyqxmd.com/read/28295503/nuclear-magnetic-resonance-structure-of-the-human-polyoma-jc-virus-agnoprotein
#20
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...
October 2017: Journal of Cellular Biochemistry
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