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https://www.readbyqxmd.com/read/28194662/mmtv-pymt-and-derived-met-1-mouse-mammary-tumor-cells-as-models-for-studying-the-role-of-the-androgen-receptor-in-triple-negative-breast-cancer-progression
#1
Jessica L Christenson, Kiel T Butterfield, Nicole S Spoelstra, John D Norris, Jatinder S Josan, Julie A Pollock, Donald P McDonnell, Benita S Katzenellenbogen, John A Katzenellenbogen, Jennifer K Richer
Triple-negative breast cancer (TNBC) has a faster rate of metastasis compared to other breast cancer subtypes, and no effective targeted therapies are currently FDA-approved. Recent data indicate that the androgen receptor (AR) promotes tumor survival and may serve as a potential therapeutic target in TNBC. Studies of AR in disease progression and the systemic effects of anti-androgens have been hindered by the lack of an AR-positive (AR+) immunocompetent preclinical model. In this study, we identified the transgenic MMTV-PyMT (mouse mammary tumor virus-polyoma middle tumor-antigen) mouse mammary gland carcinoma model of breast cancer and Met-1 cells derived from this model as tools to study the role of AR in breast cancer progression...
February 13, 2017: Hormones & Cancer
https://www.readbyqxmd.com/read/28183770/genome-sequence-of-a-marbled-eel-polyoma-like-virus-in-taiwan
#2
Chiu-Ming Wen, Ping-Chung Liu, Fan-Hua Nan
We report here the complete genome sequence of a virus isolated from a diseased marbled eel (Anguilla marmorata) in Taiwan. The virus has been characterized as being related to Japanese eel endothelial cell-infecting virus (JEECV), with a large T-antigen-like protein. The sequence of the marbled eel virus displays low homology to the JEECV.
February 9, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28152548/high-folic-acid-diet-enhances-tumour-growth-in-pymt-induced-breast-cancer
#3
Mariann Fagernæs Hansen, Sarah Østrup Jensen, Ernst-Martin Füchtbauer, Pia M Martensen
BACKGROUND: The B-vitamin folate is among the most studied bioactive food compound, and a dietary intake meeting the daily requirements has been found to reduce the risk of cancer and cardiovascular diseases as well as preventing neural tube defects during fetal development. Several countries have therefore introduced dietary fortification with folic acid. However, clinical and animal studies suggest that folic acid has a dual role in cancer development. METHODS: During the period of initial tumour progression, MMTV-PyMT (MMTV-polyoma virus middle T) transgenic mice were fed with normal diet and high folic acid diet...
February 2, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28137206/biopsy-proven-bk-virus-associated-nephropathy-clinico-pathologic-correlations
#4
Sarah Jahdali, Noura Al Oudah, Khaled O Alsaad, Hala Kfoury, Salem Qurashi, Abdulla Al Sayyari
OBJECTIVES: Our objective was to study the clinico-pathologic correlations in BK virus nephropathy. MATERIALS AND METHODS: We conducted a retrospective study of all patients with biopsy-proven polyoma (BK) virus infection. We compared their survival and renal outcomes versus BK virus-negative patients with biopsy-proven graft rejection. Histopathologic characterization by a blinded nephropathologist was performed. RESULTS: BK nephropathy was found in 10 patients biopsied for graft dysfunction...
January 30, 2017: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/27932159/fulminant-clostridium-perfringens-sepsis-in-kidney-transplant-a-case-report
#5
P Mihaylov, J A Powelson, W C Goggins
BACKGROUND: Infections, particularly urinary tract infections, and cardiovascular accidents are the main causes of morbidity and mortality during the 1st year after kidney transplantation (KT). Bacteria and viruses, such as Escherichia coli, Enteroccoci, and Polyoma BK virus are common in the 1st 6 months, so they are controlled routinely. On the other hand, Clostridium perfringens infection is a rare life-threatening condition, associated with a high mortality rate especially in the transplant population, that is not controlled routinely...
November 2016: Transplantation Proceedings
https://www.readbyqxmd.com/read/27893716/hic-5-remodeling-of-the-stromal-matrix-promotes-breast-tumor-progression
#6
G J Goreczny, J L Ouderkirk-Pecone, E C Olson, M Krendel, C E Turner
The remodeling of the stromal extracellular matrix (ECM) has a crucial, but incompletely understood role during tumor progression and metastasis. Hic-5, a focal adhesion scaffold protein, has previously been implicated in tumor cell invasion, proliferation and metastasis. To investigate the role of Hic-5 in breast tumor progression in vivo, Hic-5(-/-) mice were generated and crossed with the Mouse Mammary Tumor Virus-Polyoma Middle T-Antigen mouse. Tumors from the Hic-5(-/-);PyMT mice exhibited increased latency and reduced growth, with fewer lung metastases, as compared with Hic-5(+/-);PyMT mice...
November 28, 2016: Oncogene
https://www.readbyqxmd.com/read/27808249/apoa-i-mimetic-administration-but-not-increased-apoa-i-containing-hdl-inhibits-tumour-growth-in-a-mouse-model-of-inherited-breast-cancer
#7
Lídia Cedó, Annabel García-León, Lucía Baila-Rueda, David Santos, Victor Grijalva, Melanie Raquel Martínez-Cignoni, José M Carbó, Jari Metso, Laura López-Vilaró, Antonio Zorzano, Annabel F Valledor, Ana Cenarro, Matti Jauhiainen, Enrique Lerma, Alan M Fogelman, Srinivasa T Reddy, Joan Carles Escolà-Gil, Francisco Blanco-Vaca
Low levels of high-density lipoprotein cholesterol (HDLc) have been associated with breast cancer risk, but several epidemiologic studies have reported contradictory results with regard to the relationship between apolipoprotein (apo) A-I and breast cancer. We aimed to determine the effects of human apoA-I overexpression and administration of specific apoA-I mimetic peptide (D-4F) on tumour progression by using mammary tumour virus-polyoma middle T-antigen transgenic (PyMT) mice as a model of inherited breast cancer...
November 3, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27718431/il-2-and-polyoma-bk-virus-infection-a-systematic-review-article
#8
REVIEW
Ashraf Kariminik
It has been demonstrated that IL-2 plays a dual role in induction/suppression of immune responses via activation of conventional and regulatory T lymphocytes, respectively. IL-2 contacts complete IL-2 receptor (IL-2R) which contains CD25 (α chain) on the antigen specific activated T helper and cytotoxic lymphocytes and also T regulatory cells. Additionally, previous investigations revealed that polyoma BK virus (PBK) reactivation and induction of PBK associated nephropathy (PBKAN) is a main complication following renal transplantation...
December 2016: Cytokine
https://www.readbyqxmd.com/read/27709435/virological-quality-of-irrigation-water-in-leafy-green-vegetables-and-berry-fruits-production-chains
#9
P Kokkinos, I Kozyra, S Lazic, K Söderberg, P Vasickova, M Bouwknegt, S Rutjes, K Willems, R Moloney, A M de Roda Husman, A Kaupke, E Legaki, M D'Agostino, N Cook, C-H von Bonsdorff, A Rzeżutka, T Petrovic, L Maunula, I Pavlik, A Vantarakis
This study condenses data acquired during investigations of the virological quality of irrigation water used in production of fresh produce. One hundred and eight samples of irrigation water were collected from five berry fruit farms in Finland (1), the Czech Republic (1), Serbia (2), and Poland (1), and sixty-one samples were collected from three leafy green vegetable farms in Poland, Serbia, and Greece. Samples were analyzed for index viruses of human or animal fecal contamination (human and porcine adenoviruses, and bovine polyoma viruses), and human pathogenic viruses (hepatitis A virus, hepatitis E virus, and noroviruses GI/GII)...
October 5, 2016: Food and Environmental Virology
https://www.readbyqxmd.com/read/27647675/an-unexpected-surge-in-plasma-bkpyv-viral-load-heralds-the-development-of-bkpyv-associated-metastatic-bladder-cancer-in-a-lung-transplant-recipient-with-bkpyv-nephropathy
#10
S Kuppachi, D Holanda, M Eberlein, B Alexiev, A J Tyler, M C Wissel, S B Kleiboeker, C P Thomas
We report a lung transplant recipient who developed BK polyoma virus (BKPyV) DNAemia and BKPyV nephropathy. With careful management of his immunosuppression he achieved significant reduction in BKPyV DNAemia and stabilization of his kidney function. He later developed a high-grade bladder cancer and shortly thereafter he experienced a major upsurge in the level of BKPyV DNAemia that coincided with the discovery of hepatic metastasis. Retrospectively, the bladder cancer and the hepatic secondary tumor stained uniformly for SV40 large T antigen, and the BKPyV DNA sequences identified in plasma corresponded to BKPyV DNA within hepatic tissue, indicating that the spike in BKPyV load was likely derived from the circulating tumor cells or cell-free tumor DNA following metastases of a BKV-associated cancer...
September 20, 2016: American Journal of Transplantation
https://www.readbyqxmd.com/read/27600087/serology-in-the-digital-age-using-long-synthetic-peptides-created-from-nucleic-acid-sequences-as-antigens-in-microarrays
#11
Muhammad Rizwan, Bengt Rönnberg, Maksims Cistjakovs, Åke Lundkvist, Rudiger Pipkorn, Jonas Blomberg
BACKGROUND: Antibodies to microbes, or to autoantigens, are important markers of disease. Antibody detection (serology) can reveal both past and recent infections. There is a great need for development of rational ways of detecting and quantifying antibodies, both for humans and animals. Traditionally, serology using synthetic antigens covers linear epitopes using up to 30 amino acid peptides. METHODS: We here report that peptides of 100 amino acids or longer ("megapeptides"), designed and synthesized for optimal serological performance, can successfully be used as detection antigens in a suspension multiplex immunoassay (SMIA)...
August 10, 2016: Microarrays
https://www.readbyqxmd.com/read/27533249/aberrant-expression-of-mir-21-mir-376c-and-mir-145-and-their-target-host-genes-in-merkel-cell-polyomavirus-positive-non-small-cell-lung-cancer
#12
Ismini Lasithiotaki, Eliza Tsitoura, Anastasios Koutsopoulos, Eleni Lagoudaki, Chara Koutoulaki, George Pitsidianakis, Demetrios A Spandidos, Nikolaos M Siafakas, George Sourvinos, Katerina M Antoniou
Merkel Cell Polyoma Virus (MCPyV) infection has been associated with non-small cell lung cancer (NSCLC). Viruses can manipulate cellular miRNAs or have a profound impact on cellular miRNA expression to control host regulatory pathways. In this study, we evaluated the expression profiles of cancer-associated and virally affected host microRNAs miR-21, miR-145, miR-146a, miR-155, miR-302c, miR-367 and miR-376c in a series of NSCLC tissue samples as well as in samples from "healthy" sites, distant from the tumour region that were either positive or negative for MCPyV DNA...
August 11, 2016: Oncotarget
https://www.readbyqxmd.com/read/27532453/1-25-dihydroxyvitamin-d-circulating-levels-calcitriol-administration-and-incidence-of-acute-rejection-cmv-infection-and-polyoma-virus-infection-in-renal-transplant-recipients
#13
Luciano Moscarelli, Giulia Antognoli, Elisa Buti, Egrina Dervishi, Filippo Fani, Leonardo Caroti, Aris Tsalouchos, Elena Romoli, Giulia Ghiandai, Enrico Minetti
Observation that 1,25-Dihydroxyvitamin-D3 has an immunomodulatory effect on innate and adaptive immunity raises the possible effect on clinical graft outcome. Aim of this study was to evaluate the correlation of biopsy-proven acute rejection, CMV infection, BKV infection, with 1,25-Dihydroxyvitamin-D3 deficiency and the benefit of calcitriol supplementation before and during the transplantation. Risk factors and kidney graft function were also evaluated. All RTRs received induction therapy with basiliximab, cyclosporine, mycophenolic acid, and steroids...
October 2016: Clinical Transplantation
https://www.readbyqxmd.com/read/27500261/successful-management-of-calciphylaxis-in-a-kidney-transplant-patient-case-report
#14
Thomas Welte, Frederic Arnold, Kristin Technau-Hafsi, Elke Neumann-Haefelin, Rika Wobser, Stefan Zschiedrich, Gerd Walz, Albrecht Kramer-Zucker
UNLABELLED: Calciphylaxis is a rare and often fatal condition mostly associated with end-stage renal disease. The pathophysiology remains elusive and treatment options are scarce. We present a rare case of severe calciphylaxis after kidney transplantation in a patient with persistent hyperparathyroidism. CASE DESCRIPTION: A 78-year-old man with a history of end-stage renal disease developed edema and ulcerations on both lower limbs 14 months after kidney transplantation while receiving an mammalian target of rapamycin inhibitor to manage polyoma virus-associated nephropathy...
April 2016: Transplantation Direct
https://www.readbyqxmd.com/read/27466286/decoding-intratumoral-heterogeneity-of-breast-cancer-by-multiparametric-in-vivo-imaging-a-translational-study
#15
Jennifer Schmitz, Julian Schwab, Johannes Schwenck, Qian Chen, Leticia Quintanilla-Martinez, Markus Hahn, Beate Wietek, Nina Schwenzer, Annette Staebler, Ursula Kohlhofer, Olulanu H Aina, Neil E Hubbard, Gerald Reischl, Alexander D Borowsky, Sara Brucker, Konstantin Nikolaou, Christian la Fougère, Robert D Cardiff, Bernd J Pichler, Andreas M Schmid
Differential diagnosis and therapy of heterogeneous breast tumors poses a major clinical challenge. To address the need for a comprehensive, noninvasive strategy to define the molecular and functional profiles of tumors in vivo, we investigated a novel combination of metabolic PET and diffusion-weighted (DW)-MRI in the polyoma virus middle T antigen transgenic mouse model of breast cancer. The implementation of a voxelwise analysis for the clustering of intra- and intertumoral heterogeneity in this model resulted in a multiparametric profile based on [(18)F]Fluorodeoxyglucose ([(18)F]FDG)-PET and DW-MRI, which identified three distinct tumor phenotypes in vivo, including solid acinar, and solid nodular malignancies as well as cystic hyperplasia...
September 15, 2016: Cancer Research
https://www.readbyqxmd.com/read/27448566/optimal-use-of-plasma-and-urine-bk-viral-loads-for-screening-and-predicting-bk-nephropathy
#16
Peter Boan, Christopher Hewison, Ramyasuda Swaminathan, Ashley Irish, Kevin Warr, Rajalingam Sinniah, Todd M Pryce, James Flexman
BACKGROUND: BK virus is a polyoma virus causing renal allograft nephropathy. Reduction of immunosuppression with the early recognition of significant BK viral loads in urine and plasma can effectively prevent BKV associated nephropathy (BKVN), however the optimal compartment and frequency of BK viral load measurement post renal transplantation are undetermined. Our purpose was to examine time to detection and viral loads in urine compared to plasma, and establish viral load cut-offs associated with histological BKVN...
2016: BMC Infectious Diseases
https://www.readbyqxmd.com/read/27440877/concurrence-of-iridovirus-polyomavirus-and-a-unique-member-of-a-new-group-of-fish-papillomaviruses-in-lymphocystis-disease-affected-gilthead-sea-bream
#17
Alberto López-Bueno, Carla Mavian, Alejandro M Labella, Dolores Castro, Juan J Borrego, Antonio Alcami, Alí Alejo
UNLABELLED: Lymphocystis disease is a geographically widespread disease affecting more than 150 different species of marine and freshwater fish. The disease, provoked by the iridovirus lymphocystis disease virus (LCDV), is characterized by the appearance of papillomalike lesions on the skin of affected animals that usually self-resolve over time. Development of the disease is usually associated with several environmental factors and, more frequently, with stress conditions provoked by the intensive culture conditions present in fish farms...
October 1, 2016: Journal of Virology
https://www.readbyqxmd.com/read/27411570/bk-virus-encephalopathy-and-sclerosing-vasculopathy-in-a-patient-with-hypohidrotic-ectodermal-dysplasia-and-immunodeficiency
#18
Armine Darbinyan, Eugene O Major, Susan Morgello, Steven Holland, Caroline Ryschkewitsch, Maria Chiara Monaco, Thomas P Naidich, Joshua Bederson, Joanna Malaczynska, Fei Ye, Ronald Gordon, Charlotte Cunningham-Rundles, Mary Fowkes, Nadejda M Tsankova
Human BK polyomavirus (BKV) is reactivated under conditions of immunosuppression leading most commonly to nephropathy or cystitis; its tropism for the brain is rare and poorly understood. We present a unique case of BKV-associated encephalopathy in a man with hypohidrotic ectodermal dysplasia and immunodeficiency (HED-ID) due to IKK-gamma (NEMO) mutation, who developed progressive neurological symptoms. Brain biopsy demonstrated polyomavirus infection of gray and white matter, with predominant involvement of cortex and distinct neuronal tropism, in addition to limited demyelination and oligodendroglial inclusions...
2016: Acta Neuropathologica Communications
https://www.readbyqxmd.com/read/27408390/a-rare-case-of-hemorrhagic-cystitis-in-allogeneic-hematopoietic-stem-cell-transplant-patient
#19
Kamal Kant Sahu, Gaurav Prakash, Alka Khadwal, Subhash Chander Varma, Pankaj Malhotra
Post bone marrow transplant patients are susceptible to atypical infections, especially viral pathogens. The risk increases many folds in cases of allogeneic transplantation, which also receive GVHD prophylaxis. Viral pathogens like cytomegalovirus and herpes are the common ones encountered during follow-up period. However, in recent times there have been reports of a variety of disease manifestations of rare viruses like polyoma virus and adenovirus. These viral infections may play a crucial role in morbidity and mortality in immunocompromised patients...
June 2016: Indian Journal of Hematology & Blood Transfusion
https://www.readbyqxmd.com/read/27241182/non-metabolisable-insulin-glargine-does-not-promote-breast-cancer-growth-in-a-mouse-model-of-type-2-diabetes
#20
Emily J Gallagher, Zara Zelenko, Aviva Tobin-Hess, Ulrich Werner, Norbert Tennagels, Derek LeRoith
AIMS/HYPOTHESIS: Previous epidemiological studies have reported a potential link between insulin analogues and breast cancer; however, a prospective randomised controlled trial showed neutral effects of insulin glargine on cancer risk. Insulin glargine is metabolised in vivo to an M1 metabolite. A question remains whether a subset of individuals with slower rates of glargine metabolism or who are on high doses could, theoretically, have an increased risk of cancer progression if a tumour is already present...
September 2016: Diabetologia
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