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Infection and transplantation

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https://www.readbyqxmd.com/read/28727230/urothelial-cell-carcinoma-after-bk-polyomavirus-infection-in-kidney-transplant-recipients-a-cohort-study-of-veterans
#1
Ralph Rogers, Reginald Gohh, Amanda Noska
BACKGROUND: BK polyomavirus (BKPyV) reactivation is a common clinical occurrence in kidney transplant recipients (KTR). Several other polyomaviruses have been implicated as pathogens with a direct role in the development of malignancies, raising the question of whether BKPyV might also be oncogenic. METHODS: This study is the first retrospective, multicenter cohort study evaluating the relative risk for urothelial cell carcinoma (UCC) associated with BKPyV infection among KTR, and was conducted among veterans who underwent transplantation between 2000 and 2009...
July 20, 2017: Transplant Infectious Disease: An Official Journal of the Transplantation Society
https://www.readbyqxmd.com/read/28727201/gene-expression-stasis-and-plasticity-following-migration-into-a-foreign-environment
#2
Brian K Lohman, William E Stutz, Daniel I Bolnick
Selection against migrants is key to maintaining genetic differences between populations linked by dispersal. However, migrants may mitigate fitness costs by proactively choosing among available habitats, or by phenotypic plasticity. We previously reported that a reciprocal transplant of lake and stream stickleback (Gasterosteus aculeatus) found little support for divergent selection. Here, we revisit that experiment to test whether phenotypic plasticity in gene expression may have helped migrants adjust to unfamiliar habitats...
July 20, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28725563/atypical-hemolytic-uremic-syndrome-triggered-by-varicella-infection
#3
Pauline Condom, Jean-Michel Mansuy, Stéphane Decramer, Jacques Izopet, Catherine Mengelle
Varicella Zoster Virus (VZV) is a well-known virus that belongs to the Herpesviridae family which induces a self-limited disease except in specific cases in particular among stem cell transplant patients. This virus is not known however to trigger atypical Hemolytic Uremic Syndrome (aHUS). Here we report the case of a six-year-old boy who was hospitalized with fever and abdominal pains associated to pruritic and vesicular rash, thrombocytopenia and acute renal failure. He was diagnosed with aHUS precipitated by varicella virus...
2017: IDCases
https://www.readbyqxmd.com/read/28725131/oral-kaposi-sarcoma-in-hiv-seronegative-saudi-patient-literature-review-and-case-report
#4
Asmaa Faden, Manal AlSheddi, Mohammed AlKindi, Lama Alabdulaaly
Kaposi Sarcoma (KS) is an intermediate neoplasm affecting the endothelial cells of mucous membranes and skin. It arises most commonly among HIV-infected individuals. We present an intra-oral KS in an 80-year-old Saudi male patient, who is HIV-seronegative, non-immunosuppressed, and with no history of organ transplantation. The patient was treated with fractionated radiation therapy, and had no recurrence in the 48 months of follow-up. The clinical disease, histologic features, and treatment modality used, as well as the relative literature are presented in this paper...
July 2017: Saudi Dental Journal
https://www.readbyqxmd.com/read/28724766/a-unique-t-cell-receptor-amino-acid-sequence-selected-by-htlv-i-tax301-309-specific-cytotoxic-t-cells-in-hla-a24-02-asymptomatic-carriers-and-adult-t-cell-leukemia-lymphoma-patients
#5
Yuko Ishihara, Yukie Tanaka, Seiichiro Kobayashi, Koji Kawamura, Hideki Nakasone, Ayumi Gomyo, Jin Hayakawa, Masaharu Tamaki, Yu Akahoshi, Naonori Harada, Machiko Kusuda, Kazuaki Kameda, Tomotaka Ugai, Hidenori Wada, Kana Sakamoto, Miki Sato, Kiriko Terasako-Saito, Misato Kikuchi, Shun-Ichi Kimura, Aki Tanihara, Shinichi Kako, Kaoru Uchimaru, Yoshinobu Kanda
We previously reported that the T-cell receptor (TCR) repertoire of HTLV-I Tax301-309-specific CD8(+) cytotoxic T-cells (Tax-CTLs) was highly restricted and a particular amino acid sequence motif, "PDR", was conserved among HLA-A*24:02(+) ATL patients who have undergone allogeneic hematopoietic cell transplantation (allo-HSCT). Furthermore, we found that donor-derived PDR+CTLs selectively expanded in ATL long-term HSCT survivors with strong CTL activity against HTLV-I. On the other hand, the TCR repertoires in Tax-CTL of asymptomatic HTLV-I carriers (ACs) remain unclear...
July 19, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28724765/translesion-polymerase-pol-%C3%AE-is-required-for-efficient-epstein-barr-virus-infectivity-and-is-regulated-by-the-viral-deubiquitinating-enzyme-bplf1
#6
Ossie F Dyson, Joseph S Pagano, Christopher B Whitehurst
Epstein-Barr Virus (EBV) infection and lytic replication are known to induce a cellular DNA damage response. Previously we showed that the virally encoded BPLF1 protein interacts with and regulates several members of the translesion synthesis pathway (TLS), a DNA damage tolerance pathway, and that these cellular factors enhance viral infectivity. BPLF1 is a late lytic cycle gene, but the protein is also packaged in the viral tegument indicating that BPLF1 may function both early and late during infection. BPLF1 expresses deubiquitinating activity that is strictly conserved across the Herpesviridae; mutation of the active-site cysteine results in loss of enzymatic activity...
July 19, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28724761/isg15-modulates-type-i-interferon-signaling-and-antiviral-response-during-hepatitis-e-virus-replication
#7
Harini Sooryanarain, Adam J Rogers, Dianjun Cao, Mary Etna R Haac, Yogesh A Karpe, Xiang-Jin Meng
Hepatitis E virus (HEV), a single-stranded positive-sense RNA virus, generally causes a self-limiting acute viral hepatitis, although chronic HEV infection has recently become a significant clinical problem in immunocompromised individuals especially in solid organ transplant recipients. Innate immunity, via type-I interferon (IFN) response, plays an important role during initial stages of a viral infection. ISG15, an IFN-induced ubiquitin-like protein, is known to have an immunomodulatory role, as well as can impart a direct antiviral effect against a wide spectrum of virus families...
July 19, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28724453/decrease-in-vancomycin-resistant-enterococcus-colonization-after-extensive-renovation-of-a-unit-dedicated-to-the-treatment-of-hematologic-malignancies-and-hematopoietic-stem-cell-transplantation
#8
Clyde D Ford, Michaela A Gazdik Stofer, Jana Coombs, Bert K Lopansri, Brandon J Webb, Gabriela Motyckova, Finn Bo Petersen
OBJECTIVE While a direct relation between hospital construction and concomitant infection rates has been clearly established, few data are available regarding the environmental decontamination effects of renovation in which surfaces are replaced and regarding subsequent infection incidence. DESIGN Retrospective clinical study with vancomycin-resistant Enterococcus (VRE) molecular strain typing and environmental cultures. SETTING A regional referral center for acute leukemia and hematopoietic stem-cell transplantation...
July 20, 2017: Infection Control and Hospital Epidemiology
https://www.readbyqxmd.com/read/28723471/urinary-tract-infections-in-immunocompromised-patients-with-diabetes-chronic-kidney-disease-and-kidney-transplant
#9
REVIEW
Zafer Tandogdu, Tommaso Cai, Bela Koves, Florian Wagenlehner, Truls Erik Bjerklund-Johansen
CONTEXT: This paper provides a brief overview of urinary tract infections (UTIs) in immunocompromised patients from the perspective of a practicing urologist. OBJECTIVE: The primary objective was to provide an update on UTIs in immunocompromised patients. Diabetes mellitus (DM), chronic kidney disease, and kidney transplant (KT) are the most common clinical cases encountered by urologists. Diagnosis, management, and future research needs are summarised. EVIDENCE ACQUISITION: We conducted a nonsystematic review of the literature...
October 2016: European Urology Focus
https://www.readbyqxmd.com/read/28722255/drug-drug-interactions-between-triazole-antifungal-agents-used-to-treat-invasive-aspergillosis-and-immunosuppressants-metabolized-by-cytochrome-p450-3a4
#10
REVIEW
Andreas H Groll, Robert Townsend, Amit Desai, Nkechi Azie, Mark Jones, Marc Engelhardt, Anne-Hortense Schmitt-Hoffman, Robert J Brüggemann
Patients undergoing treatment with immunosuppressant drugs following solid organ or hematopoietic stem cell transplantation are at particular risk for development of serious infections such as invasive aspergillosis. Four triazole antifungal drugs, voriconazole, posaconazole, itraconazole, and isavuconazole, are approved to treat invasive aspergillosis either as first- or second-line therapy. All of these agents are inhibitors of cytochrome P450 3A4, which plays a key role in metabolizing immunosuppressant drugs such as cyclosporine, tacrolimus, and sirolimus...
July 19, 2017: Transplant Infectious Disease: An Official Journal of the Transplantation Society
https://www.readbyqxmd.com/read/28721465/growth-of-children-born-to-renal-transplanted-women
#11
M Isabel S Dinelli, Erika Ono, Patrícia O Viana, Amélia M N Dos Santos, M Isabel de Moraes-Pinto
Neonates born to transplanted mothers are exposed to immunosuppressive drugs during gestation and have a higher risk of being born prematurely and small for gestational age than the general population. We have prospectively followed up 27 children born to renal transplanted mothers from a single center and 31 healthy children born at term with adequate weight for gestational age. Comparisons of weight and length measurements were made at birth, 1 month (±0.9), 3 months (±1.0), 6 months (±1.0), 9 months (±1...
July 18, 2017: European Journal of Pediatrics
https://www.readbyqxmd.com/read/28721353/hepatitis-e-virus-associated-meningoencephalitis-in-a-lung-transplant-recipient-diagnosed-by-clinical-metagenomic-sequencing
#12
Jamie A Murkey, Kara W Chew, Margrit Carlson, Chelsea L Shannon, Deepika Sirohi, Hannah A Sample, Michael R Wilson, Paul Vespa, Romney M Humphries, Steve Miller, Jeffrey D Klausner, Charles Y Chiu
Hepatitis E virus (HEV) infection uncommonly causes chronic hepatitis and neurologic disease. We describe a case of genotype 3a HEV meningoencephalitis diagnosed by metagenomic next-generation sequencing, illustrating the power of an unbiased molecular approach to microbial testing and the first reported case of HEV infection presumably acquired through lung transplantation.
2017: Open Forum Infectious Diseases
https://www.readbyqxmd.com/read/28720679/potential-for-monitoring-gut-microbiota-for-diagnosing-infections-and-graft-versus-host-disease-in-cancer-and-stem-cell-transplant-patients
#13
Andrew Y Koh
BACKGROUND: Gut microbiota, the collective community of microorganisms inhabiting the intestine, have been shown to provide many beneficial functions for the host. Recent advances in next-generation sequencing and advanced molecular biology approaches have allowed researchers to identify gut microbiota signatures associated with disease processes and, in some cases, establish causality and elucidate underlying mechanisms. CONTENT: This report reviews 3 commonly used methods for studying the gut microbiota and microbiome (the collective genomes of the gut microorganisms): 16S rRNA gene sequencing, bacterial group or species-specific quantitative polymerase chain reaction (qPCR), and metagenomic shotgun sequencing (MSS)...
July 18, 2017: Clinical Chemistry
https://www.readbyqxmd.com/read/28719361/effectiveness-of-valganciclovir-900mg-versus-450mg-for-cytomegalovirus-prophylaxis-in-renal-transplantation-a-systematic-review-and-meta-analysis
#14
Wang Xin, Yang Hui, Zhang Xiaodong, Cui Xiangli, Wang Shihui, Liu Lihong
OBJECTIVES: Valganciclovir 900 mg/day is approved for cytomegalovirus (CMV) prophylaxis, but 450 mg/day is seems also effective. We systematically reviewed the efficacy and safety of low-dose versus high-dose valganciclovir prophylaxis in renal transplantation recipients. METHODS: An electronic search was conducted up to November 29, 2016. The primary outcomes were incidences of CMV, CMV disease, mortality and opportunistic infection. The second outcomes were acute rejection, allograft loss, adverse drug reaction (ADR)...
2017: Journal of Pharmacy & Pharmaceutical Sciences: a Publication of the Canadian Society for Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28718264/malignant-infantile-osteopetrosis
#15
Saima Gillani, Zaheer Abbas
Two main forms of osteopetrosis are recognized, a severe autosomal recessive form (MIM 259700) with an incidence of approximately 1 in 250,000 births and a mild autosomal dominant form (MIM166600) with an incidence of 1 in 20,000 births. Intrinsic disturbances of osteoclastic function due to mutations in genes encoding osteoclast-specific subunits of the vacuolar proton pump (TCIRG1, CLCN7) are found in most patients with recessive form. Mutations of CLCN7 are observed in dominant form of osteopetrosis .The recessive form of ostreopetrosis, i...
April 2017: Journal of Ayub Medical College, Abbottabad: JAMC
https://www.readbyqxmd.com/read/28717935/rabbit-anti-human-thymocyte-immunoglobulin-for-the-rescue-treatment-of-chronic-antibody-mediated-rejection-after-pediatric-kidney-transplantation
#16
Yasemen Cihan, Nele Kanzelmeyer, Jens Drube, Martin Kreuzer, Christian Lerch, Imke Hennies, Kerstin Froede, Murielle Verboom, Thurid Ahlenstiel-Grunow, Lars Pape
BACKGROUND: Chronic antibody-mediated rejection (cAMR) is the leading cause of late kidney graft loss, but current therapies are often ineffective. Rabbit anti-human thymocyte immunoglobulin (rATG) may be helpful, but its use is virtually undocumented. METHODS: Data were analyzed retrospectively from nine pediatric kidney transplant patients with cAMR were treated with rATG (1.5 mg/kg × 5 days) at our center after non-response to pulsed prednisolone, intravenous immunoglobulin, rituximab, and increased immunosuppressive intensity (including switching to belatacept in some cases), with or without bortezomib...
July 17, 2017: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/28717086/therapy-related-acute-myeloid-leukemia-after-the-long-term-administration-of-low-dose-etoposide-for-chronic-type-adult-t-cell-leukemia-lymphoma-a-case-report-and-literature-review
#17
Naoki Shimada, Nobuhiro Ohno, Ryuji Tanosaki, Shigeo Fuji, Yuhko Suzuki, Koichiro Yuji, Kaoru Uchimaru, Arinobu Tojo
A 61-year-old woman with chronic-type adult T-cell leukemia-lymphoma (ATL) had been taking low-dose oral etoposide for progressive lymphocytosis. After taking this for 3.5 years, she was diagnosed with therapy-related acute myeloid leukemia (t-AML), with a chromosomal translocation of t (6:11) (q27; q23). She thus received remission induction therapy, consolidation therapy, and allogeneic hematopoietic stem cell transplantation. Although both t-AML and ATL were in remissive states, she died of a therapy-related infection within 1 year...
2017: Internal Medicine
https://www.readbyqxmd.com/read/28716027/cytomegalovirus-viraemia-and-mortality-in-renal-transplant-recipients-in-the-era-of-antiviral-prophylaxis-lessons-from-the-western-australian-experience
#18
Linda A Selvey, Wai H Lim, Peter Boan, Ramyasuda Swaminathan, Claudia Slimings, Amy E Harrison, Aron Chakera
BACKGROUND: Cytomegalovirus (CMV) establishes a lifelong infection that is efficiently controlled by the immune system; this infection can be reactivated in case of immunosuppression such as following solid organ transplantation. CMV viraemia has been associated with CMV disease, as well as increased mortality and allograft failure. Prophylactic antiviral medication is routinely given to renal transplant recipients, but reactivation during and following cessation of antiviral prophylaxis is known to occur...
July 17, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28714558/everolimus-and-reduced-calcineurin-inhibitor-therapy-in-pediatric-liver-transplant-recipients-results-from-a-multicenter-prospective-study
#19
Rainer Ganschow, Bo-Goran Ericzon, Anil Dhawan, Khalid Sharif, El-Djouher Martzloff, Barbara Rauer, Jennifer Ng, Patricia Lopez
In a 24-month, multicenter, single-arm, prospective study, 56 pediatric liver transplant patients with or without basiliximab induction were converted at 1-6 months post-transplant from standard calcineurin inhibitor (CN) therapy (± mycophenolic acid), to everolimus with reduced exposure to CNI (tacrolimus n=50, cyclosporine n=6). Steroid therapy was optional. Recruitment was stopped prematurely due to high rates of PTLD, treatment-related serious infections leading to hospitalization and premature study drug discontinuation...
July 17, 2017: Pediatric Transplantation
https://www.readbyqxmd.com/read/28713390/hematopoietic-stem-cell-transplantation-in-an-infant-with-immunodeficiency-centromeric-instability-and-facial-anomaly-syndrome
#20
Katharina L Gössling, Cyrill Schipp, Ute Fischer, Florian Babor, Gerhard Koch, Friedhelm R Schuster, Jutta Dietzel-Dahmen, Dagmar Wieczorek, Arndt Borkhardt, Roland Meisel, Michaela Kuhlen
Immunodeficiency, centromeric instability, and facial anomaly (ICF) syndrome is a rare autosomal recessive genetic condition with severe immunodeficiency, which leads to lethal infections if not recognized and treated in early childhood. Up-to-date treatment regimens consist of prophylactic and supportive treatment of the recurrent infections. Here, we report the case of a 1-year-old boy of Moroccan consanguineous parents, who was diagnosed at 4 months of age with ICF syndrome with a homozygous missense mutation in the DNMT3B gene...
2017: Frontiers in Immunology
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