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https://www.readbyqxmd.com/read/28617169/the-frequency-and-associated-factors-for-bk-virus-infection-in-a-center-performing-mainly-living-kidney-transplantations
#1
Selma Alagoz, Mert Kuskucu, Sibel Gulcicek, Serkan Feyyaz Yalin, Meric Oruc, Kenan Midilli, Erkan Yılmaz, Mehmet Riza Altiparmak, Nurhan Seyahi
PURPOSE: BK virus (BKV) nephropathy has increasingly become an important cause of morbidity in renal transplant recipients. We evaluated the frequency and associated factors for BKV infection in a center performing mainly living donor transplantations over a long time period. METHODS: One hundred consecutive renal transplant patients were included. Quarterly visits were planned to examine urine for decoy cells and to measure the BKV DNA in the blood and urine. Renal biopsy was performed in case of deteriorated allograft function...
June 2017: Progress in Transplantation
https://www.readbyqxmd.com/read/28598058/successful-treatment-of-bk-virus-hemorrhagic-cystitis-hc-post-allogenic-hematopoietic-stem-cell-transplantation-with-low-dose-cidofovir
#2
R Arora, Jasmita, M Singh, A Garg, M Gupta, N Gupta
BK virus (BKV) hemorrhagic cystitis (HC) is a serious cause of morbidity and mortality after allogeneic hematopoietic SCT (allo-HSCT) in patients with hematological malignancies. Around half of allogenic HSCT patients present with BKV viruria at some point after HSCT; about 5-40% of these patients subsequently develop active HC. Supportive care including bladder irrigation, blood transfusions and symptomatic pain management remains the mainstay of therapy; the acyclic nucleoside analogue cidofovir is currently the front-line drug for BKV-HC treatment...
May 2017: Journal of the Association of Physicians of India
https://www.readbyqxmd.com/read/28557148/the-impact-of-recipient-bkv-shedding-before-transplant-on-bkv-viruria-dnaemia-and-nephropathy-post-transplant-a-prospective-study
#3
P S Verghese, D O Schmeling, E A Filtz, A J Matas, H H Balfour
We previously demonstrated that detectable BKV replication in donor urine pretransplant was significantly associated with post-transplant recipient BKV viremia. In this 4-year prospective study, we assessed whether recipient BKV replication pretransplant was associated with post-transplant viremia/BKV nephropathy. We studied 220 primary adult and pediatric organ transplant recipients for 490 person-years and 2100 clinical visits. BKV viruria was detectable in 28 (16%), 26 adults and two children; and viremia in none pretransplant...
May 29, 2017: Pediatric Transplantation
https://www.readbyqxmd.com/read/28509373/bk-viremia-surveillance-and-outcomes-in-simultaneous-pancreas-kidney-transplant-recipients
#4
Scott G Westphal, Elizabeth R Lyden, Eric D Langewisch, Clifford D Miles
BACKGROUND: While screening for asymptomatic BK viremia (BKV) has been well studied in isolated kidney transplant recipients, there is a paucity of published outcomes in simultaneous pancreas-kidney (SPK) transplant recipients who underwent BKV screening followed by pre-emptive reduction of immunosuppression. METHODS: This is a single-center, retrospective review of 31 consecutive SPK recipients who were transplanted over a five year period following the initiation of a serum BKV screening protocol...
May 16, 2017: Clinical Transplantation
https://www.readbyqxmd.com/read/28492728/evaluation-of-the-predisposition-and-clinical-impact-of-bk-virus-replication-in-kidney-transplant-patients
#5
Elviani B Moura, Silvia V Petzhold, Augusto R Amaral, Luciane M Deboni, Paulo H C DE França
The BK virus (BKV) produces a subclinical kidney infection in immunocompetent individuals. However, viremia may occur in kidney transplant patients with ongoing immunosuppression. BKV-associated nephropathy (BKVN) has no specific treatment and is a leading cause of organ transplant loss. In this study, we evaluated the predisposition and the clinical impact of BKV replication in kidney transplant patients during post-transplant monitoring in a reference institution in Brazil. Demographic, clinical and laboratory data generated during routine outpatient follow-up were retrospectively collected...
May 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28480300/toward-a-rapid-production-of-multivirus-specific-t-cells-targeting-bkv-adenovirus-cmv-and-ebv-from-umbilical-cord-blood
#6
Hema Dave, Min Luo, J W Blaney, Shabnum Patel, Cecilia Barese, Conrad Russell Cruz, Elizabeth J Shpall, Catherine M Bollard, Patrick J Hanley
Umbilical cord blood (CB) has emerged as an effective alternative donor source for hematopoietic stem cell transplantation. Despite this success, the prolonged duration of immune suppression following CB transplantation and the naiveté of CB T cells leave patients susceptible to viral infections. Adoptive transfer of ex vivo-expanded virus-specific T cells from CB is both feasible and safe. However, the manufacturing process of these cells is complicated, lengthy, and labor-intensive. We have now developed a simplified method to manufacture a single culture of polyclonal multivirus-specific cytotoxic T cells in less than 30 days...
June 16, 2017: Molecular Therapy. Methods & Clinical Development
https://www.readbyqxmd.com/read/28480121/alchemy-a-web-2-0-real-time-quality-assurance-platform-for-human-immunodeficiency-virus-hepatitis-c-virus-and-bk-virus-quantitation-assays
#7
Emmanuel Agosto-Arroyo, Gina M Coshatt, Thomas S Winokur, Shuko Harada, Seung L Park
BACKGROUND: The molecular diagnostics laboratory faces the challenge of improving test turnaround time (TAT). Low and consistent TATs are of great clinical and regulatory importance, especially for molecular virology tests. Laboratory information systems (LISs) contain all the data elements necessary to do accurate quality assurance (QA) reporting of TAT and other measures, but these reports are in most cases still performed manually: a time-consuming and error-prone task. The aim of this study was to develop a web-based real-time QA platform that would automate QA reporting in the molecular diagnostics laboratory at our institution, and minimize the time expended in preparing these reports...
2017: Journal of Pathology Informatics
https://www.readbyqxmd.com/read/28434897/epidemiology-of-polyomavirus-bk-bkv-and-the-emergent-african-variant-in-kidney-and-bone-marrow-transplant-recipients-in-the-fundacion-valle-del-lili-in-cali-colombia
#8
Luz Ángela Ocampo, Fernando Rosso, Robinson Pacheco, Adriana Villegas
To describe the epidemiology of BKV and to assess the presence of the African variant in bone marrow and kidney transplant patients who have suspected BKV reactivation. A descriptive study was conducted, using institutional records, at the Fundación Valle del Lili, Cali-Colombia. The overall prevalence of BKV during the study period was 51%. The African variant was identified in 49.4% of samples that were positive for BKV. 50.6% of the samples were found to have the wild strain of BKV. Among BKV positive patients, 57% were kidney transplant recipients and 43% were bone marrow transplant recipients...
April 6, 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/28399927/bk-viruria-and-viremia-in-children-with-systemic-lupus-erythematosus
#9
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/28340828/prevalence-and-risk-factors-of-bk-viremia-in-patients-with-kidney-transplantation-a-single-center-experience-from-turkey
#10
S E Dogan, Z K Celebi, S Akturk, S Kutlay, A Tuzuner, K Keven, S Sengul
BACKGROUND: BK virus is the cause of nephropathy, which can progress to graft loss after kidney transplantation. In this study, we aimed to investigate the prevalence and risk factors of BK viremia in patients with kidney transplantation at our center. METHODS: This was a retrospective single-center study. We included recipients transplanted between 2010 and 2015. Patients were stratified according to BK virus DNA follow-up values into three groups (0-999 copies/mL, 1000-9999 copies/mL and ≥10,000 copies/mL)...
April 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28298471/bk-polyomavirus-clinical-aspects-immune-regulation-and-emerging-therapies
#11
REVIEW
George R Ambalathingal, Ross S Francis, Mark J Smyth, Corey Smith, Rajiv Khanna
BK polyomavirus (BKV) causes frequent infections during childhood and establishes persistent infections within renal tubular cells and the uroepithelium, with minimal clinical implications. However, reactivation of BKV in immunocompromised individuals following renal or hematopoietic stem cell transplantation may cause serious complications, including BKV-associated nephropathy (BKVAN), ureteric stenosis, or hemorrhagic cystitis. Implementation of more potent immunosuppression and increased posttransplant surveillance has resulted in a higher incidence of BKVAN...
April 2017: Clinical Microbiology Reviews
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
#12
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 had polyoma virus large T-antigen expression in tubular epithelium by immunohistochemistry...
March 14, 2017: Transplant International: Official Journal of the European Society for Organ Transplantation
https://www.readbyqxmd.com/read/28280692/influence-of-tacrolimus-metabolism-rate-on-renal-function-after-solid-organ-transplantation
#13
REVIEW
Gerold Thölking, Hans Ulrich Gerth, Katharina Schuette-Nuetgen, Stefan Reuter
The calcineurin inhibitor (CNI) tacrolimus (TAC) is an integral part of the immunosuppressive regimen after solid organ transplantation. Although TAC is very effective in prevention of acute rejection episodes, its highly variable pharmacokinetic and narrow therapeutic window require frequent monitoring of drug levels and dose adjustments. TAC can cause CNI nephrotoxicity even at low blood trough levels (4-6 ng/mL). Thus, other factors besides the TAC trough level might contribute to CNI-related kidney injury...
February 24, 2017: World Journal of Transplantation
https://www.readbyqxmd.com/read/28265581/impact-of-desensitization-on-antiviral-immunity-in-hla-sensitized-kidney-transplant-recipients
#14
Mieko Toyoda, Bong-Ha Shin, Shili Ge, James Mirocha, David Thomas, Maggie Chu, Edgar Rodriguez, Christine Chao, Anna Petrosyan, Odette A Galera, Ashley Vo, Jua Choi, Alice Peng, Joseph Kahwaji, Stanley C Jordan
Viral infections represent significant morbidity and mortality factors in kidney transplant recipients, with CMV, EBV, and BKV infections being most common. Desensitization (DES) with IVIg and rituximab with/without plasma exchange followed by kidney transplantation with alemtuzumab induction increased successful transplant rates in HLA-sensitized patients but may represent an increased risk for viral infections due to severe lymphocyte depletion. Here, we report on the posttransplant viral infection status in 372 DES versus 538 non-DES patients...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28247238/clinical-pharmacokinetic-monitoring-of-leflunomide-in-renal-transplant-recipients-with-bk-virus-reactivation-a-review-of-the-literature
#15
REVIEW
Joan C Y Ng, Marianna Leung, Alissa J Wright, Mary H H Ensom
Leflunomide is an immunosuppressive drug with in vitro and initial observational evidence of antiviral activity against BK virus (BKV), a pathogen that causes opportunistic infection upon reactivation in renal transplant recipients. Leflunomide is considered an ancillary option to immunosuppression reduction in the management of BKV reactivation. Plasma or blood concentrations of teriflunomide, the active metabolite of leflunomide, are commonly monitored because of high leflunomide doses being used, known inter-individual variability in pharmacokinetics, and hepatotoxicity risk...
February 28, 2017: Clinical Pharmacokinetics
https://www.readbyqxmd.com/read/28221173/new-developments-in-transplant-proteomics
#16
Julie Ho, Patricia Hirt-Minkowski, John A Wilkins
PURPOSE OF REVIEW: Despite modern immunosuppression, renal allograft rejection remains a major contributor to graft loss. Novel biomarkers may help improve posttransplant outcomes through the early detection and treatment of rejection. Our objective is to provide an overview of proteomics, review recent discovery-based rejection studies, and explore innovative approaches in biomarker development. RECENT FINDINGS: Urine MMP7 was identified as a biomarker of subclinical and clinical rejection using two-dimensional liquid chromatography tandem-mass spectrometry (LC-MS/MS) and improved the overall diagnostic discrimination of urine CXCL10 : Cr alone for renal allograft inflammation...
May 2017: Current Opinion in Nephrology and Hypertension
https://www.readbyqxmd.com/read/28209721/the-cumulative-burden-of-double-stranded-dna-virus-detection-after-allogeneic-hct-is-associated-with-increased-mortality
#17
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 to 2014. We used quantitative PCR to test for cytomegalovirus, BK polyomavirus, human herpesvirus 6B, HHV-6A, adenovirus, and Epstein-Barr virus between days 0 and 100 post-HCT. We evaluated risk factors for detection of multiple viruses and association of viruses with mortality through day 365 post-HCT with Cox models...
April 20, 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
#18
Marie-Christine Simard-Meilleur, Paule Bodson-Clermont, Gilles St-Louis, Michel R Pâquet, Catherine Girardin, Marie-Chantal Fortin, Héloïse Cardinal, Marie-Josée Hébert, Renée 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/28191298/asymptomatic-epstein-barr-virus-shedding-in-the-urine-of-kidney-transplant-recipients-case-reports-and-review-of-the-literature
#19
Maryam Rahbar, Gholamreza Poormand, Masoud Karkhaneh Mahmoodi, Aboozar Jazayeri, Seyed Mohammad Jazayeri
Epstein-Barr virus (EBV) is associated with a wide range of malignancies and complications like post-transplant lymphoproliferative disorder (PTLD). To suppress active EBV infection in transplant recipients, who are at a heightened risk of developing PTLD, EBV DNAemia monitoring has been recommended. Quantitative multiplex real time polymerase chain reaction (QMRTPCR) offered the advantage of detection of more than one target in the same sample. We present four cases of kidney transplant recipient who were admitted for rising serum creatinine between 9 and 20 months post-transplant with a suspicion of BKV-associated nephropathy...
December 31, 2016: Infectious Disease Reports
https://www.readbyqxmd.com/read/28160729/comparison-of-emag%C3%A2-versus-nuclisens-%C3%A2-easymag-%C3%A2-performance-on-clinical-specimens
#20
Magali Garcia, Céline Chessa, Anne Bourgoin, Geneviève Giraudeau, Chloé Plouzeau, Gérard Agius, Nicolas Lévêque, Agnès Beby-Defaux
BACKGROUND: eMAG™ (bioMerieux) is a new nucleic acid extraction platform based on magnetic silica technology, like its predecessor, NucliSENS(®) easyMAG(®) (bioMerieux). Using the same reagents and disposables, eMAG™ adds further automation, allowing simultaneous extraction of 48 samples directly from primary tubes, and distribution of nucleic acid extracts on PCR strips or in tubes at the end of the extraction process. OBJECTIVE: To compare the performance of eMAG™ and easyMAG(®) on various clinical specimens...
March 2017: Journal of Clinical Virology: the Official Publication of the Pan American Society for Clinical Virology
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