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Bovine Leukemia Virus

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https://www.readbyqxmd.com/read/28493491/high-doses-of-recombinant-mannan-binding-lectin-inhibit-the-binding-of-influenza-a-h1n1-pdm09-virus-with-cells-expressing-dc-sign
#1
Lei Yu, Shiqiang Shang, Ran Tao, Caiyun Wang, Li Zhang, Hao Peng, Yinghu Chen
The pandemic influenza A (H1N1)pdm09 virus continues to be a threat to human health. Low doses of mannan-binding lectin (MBL) (<1 μg/mL) were shown not to protect against influenza A(H1N1)pdm09 infection. However, the effect of high doses of MBL has not been investigated. Dendritic cell-specific intercellular adhesion molecule-3 grabbing non-integrin (DC-SIGN) has been proposed as an alternative receptor for influenza A(H1N1)pdm09 virus. In this study, we examined the expression of DC-SIGN on DCs as well as on acute monocytic leukemia cell line, THP-1...
May 11, 2017: APMIS: Acta Pathologica, Microbiologica, et Immunologica Scandinavica
https://www.readbyqxmd.com/read/28445479/in-vitro-and-in-vivo-antivirus-activity-of-an-anti-programmed-death-ligand-1-pd-l1-rat-bovine-chimeric-antibody-against-bovine-leukemia-virus-infection
#2
Asami Nishimori, Satoru Konnai, Tomohiro Okagawa, Naoya Maekawa, Ryoyo Ikebuchi, Shinya Goto, Yamato Sajiki, Yasuhiko Suzuki, Junko Kohara, Satoshi Ogasawara, Yukinari Kato, Shiro Murata, Kazuhiko Ohashi
Programmed death-1 (PD-1), an immunoinhibitory receptor on T cells, is known to be involved in immune evasion through its binding to PD-ligand 1 (PD-L1) in many chronic diseases. We previously found that PD-L1 expression was upregulated in cattle infected with bovine leukemia virus (BLV) and that an antibody that blocked the PD-1/PD-L1 interaction reactivated T-cell function in vitro. Therefore, this study assessed its antivirus activities in vivo. First, we inoculated the anti-bovine PD-L1 rat monoclonal antibody 4G12 into a BLV-infected cow...
2017: PloS One
https://www.readbyqxmd.com/read/28436273/proteome-analysis-of-sheep-b-lymphocytes-in-the-course-of-bovine-leukemia-virus-induced-leukemia
#3
Michal Reichert
Presented are the results of a study of the expression pattern of different proteins in the course of bovine leukemia virus-induced leukemia in experimental sheep and I discuss how the obtained data may be useful in gaining a better understanding of the pathogenesis of the disease, diagnosis, and for the selection of possible therapeutic targets. In cattle, the disease is characterized by life-long persistent lymphocytosis leading to leukemia/lymphoma in about 5% of infected animals. In sheep, as opposed to cattle, the course of the disease is always fatal and clinical symptoms usually occur within a three-year period after infection...
January 1, 2017: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28393187/generation-and-characterization-of-induced-pluripotent-stem-cells-from-guinea-pig-fetal-fibroblasts
#4
Yuehong Wu, Ouyang Li, Chengwen He, Yong Li, Min Li, Xiaoming Liu Liu, Yujiong Wang, Yulong He
Induced pluripotent stem cells (iPS) represent an important tool to develop disease‑modeling assays, drug testing assays and cell‑based replacement therapies. The application of iPS in these fields requires the development of suitable animal models. Of the suitable species, guinea pigs are particularly important and offer significant advantages. Successful iPS generation has been accomplished in a number of species; however, it has not been reported in the guinea pig. The present study successfully generated iPS from guinea pigs (giPS) using single polycistronic virus transduction with mouse octamer‑binding transcription factor 4 (Oct4), sex determining region Y‑box 2 (Sox2), Kruppel‑like factor 4 and c‑Myc...
June 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28381128/bovine-leukemia-virus-seroprevalence-among-cattle-presented-for-slaughter-in-the-united-states
#5
Fernando V Bauermann, Julia F Ridpath, David A Dargatz
Infection with bovine leukemia virus (BLV) results in economic loss because of reduced productivity, especially reduced milk production, and early culling. In the United States, studies in 1996, 1999, and 2007 showed BLV infection to be widespread, especially in dairy herds. We updated information herein on BLV seroprevalence in the United States, using samples submitted for testing and found negative for antibodies for Brucella by the Kentucky Eastern Regional Federal Brucellosis Laboratory. From October 2014 through August 2015, 2,000 samples from all regions of the contiguous United States were selected and tested for BLV antibodies by enzyme-linked immunosorbent assay...
April 1, 2017: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/28376881/single-nucleotide-polymorphisms-in-the-bovine-mhc-region-of-japanese-black-cattle-are-associated-with-bovine-leukemia-virus-proviral-load
#6
Shin-Nosuke Takeshima, Shinji Sasaki, Polat Meripet, Yoshikazu Sugimoto, Yoko Aida
Bovine leukemia virus (BLV) is the causative agent of enzootic bovine leukosis, a malignant B cell lymphoma that has spread worldwide and causes serious problems for the cattle industry. The BLV proviral load, which represents the BLV genome integrated into host genome, is a useful index for estimating disease progression and transmission risk. Here, we conducted a genome-wide association study to identify single nucleotide polymorphisms (SNPs) associated with BLV proviral load in Japanese Black cattle. The study examined 93 cattle with a high proviral load and 266 with a low proviral load...
April 4, 2017: Retrovirology
https://www.readbyqxmd.com/read/28365518/immunological-implications-of-bovine-leukemia-virus-infection
#7
M G Blagitz, F N Souza, C F Batista, L F F Azevedo, E M R Sanchez, S A Diniz, M X Silva, J P Haddad, A M M P Della Libera
This study examined neutrophil and monocyte functions and the blood lymphocyte profile of naturally BLV-infected cows with or without persistent lymphocytosis (PL). The percentage of neutrophils and monocytes that phagocytosed Staphylococcus aureus was lower in BLV-infected dairy cows, particularly those with PL. The relative percentage of CD44(+) monocytes and neutrophils and CD11b expression by neutrophils was also lower in BLV-infected dairy cows with PL. A correlation between the percentage of CD11b(+) neutrophils and that produced reactive oxygen species (ROS) was found...
March 24, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28357670/quantification-of-cell-turnover-in-the-bovine-leukemia-virus-model
#8
Alix de Brogniez, Pierre-Yves Barez, Alexandre Carpentier, Geronimo Gutierrez, Michal Reichert, Karina Trono, Luc Willems
In a perspective of a comparative virology approach, characterization of the bovine leukemia virus (BLV) model may be helpful to better understand infection by the related human T-lymphotropic virus type 1 (HTLV-1). In this paper, we first provide detailed protocols to inoculate cloned BLV proviruses into sheep or cattle. We also describe methods to quantify apoptosis ex vivo and cell turnover in vivo.
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28331116/phylogenetic-analysis-of-env-gene-of-bovine-leukemia-virus-strains-spread-in-miyazaki-prefecture-japan
#9
Marawan A Marawan, Hirohisa Mekata, Takumi Hayashi, Satoshi Sekiguchi, Yumi Kirino, Yoichiro Horii, Abdel-Moneim M Moustafa, Faysal K Arnaout, El Sayed M Galila, Junzo Norimine
To understand how the latest dominant bovine leukemia virus (BLV) strains were introduced and spread in the Miyazaki prefecture, we collected blood samples from 3 geographic areas (north, central and south) and carried out sequence analysis of the BLV env gene. Two genotypes, genotype I, and III, were identified and the majority of the strains belonged to genotype I (71/74). To clarify a route of BLV introduction, we divided the strains into 20 subgenotypes based on their nucleotide sequences and performed phylogenetic analysis...
March 23, 2017: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/28330779/enzootic-bovine-leukosis-in-a-two-month-old-calf
#10
Keisuke Oguma, Miho Suzuki, Hiroshi Sentsui
A two-month-old calf was diagnosed with leukosis on the basis of the clinical sign of enlarged, superficial lymph nodes. Serological and genetic tests for bovine leukemia virus (BLV) were performed because the calf was born from a cow infected with BLV. The serum had a weakly positive BLV antibody, and the BLV provirus was detected within neoplastic cells on performing polymerase chain reaction (PCR). Analysis of the BLV provirus integration site using inverse PCR revealed that the BLV integration site location was identical on all chromosomes in all tumor tissues examined...
March 19, 2017: Virus Research
https://www.readbyqxmd.com/read/28221870/bovine-leukemia-virus-and-mycobacterium-avium-subsp-paratuberculosis-are-not-associated-with-shiga-toxin-producing-escherichia-coli-shedding-in-cattle
#11
Cristina Venegas-Vargas, Shannon D Manning, Paul M Coussens, Jonathan A Roussey, Paul Bartlett, Daniel Grooms
Bovine leukemia virus (BLV) is a retrovirus that causes enzootic bovine leukosis in cattle, and Mycobacterium avium subsp. paratuberculosis (MAP) is the etiologic agent of Johne's disease in cattle. Both diseases are chronic in nature and can lead to the disruption of normal immunological or physiological processes. Cattle are the major reservoir of Shiga toxin-producing Escherichia coli (STEC), a cause of foodborne illness in humans. We tested the hypothesis that cattle infected with BLV or MAP are more likely to shed STEC...
January 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28213870/molecular-characterization-of-bovine-leukemia-virus-from-moldovan-dairy-cattle
#12
Aneta Pluta, Marzena Rola-Łuszczak, Piotr Kubiś, Svetlana Balov, Roman Moskalik, Bhudipa Choudhury, Jacek Kuźmak
Bovine leukemia virus (BLV) is the causative agent of enzootic bovine leukosis (EBL), a disease that has worldwide distribution. Whilst it has been eradicated in most of Western Europe and Scandinavia, it remains a problem in other regions, particularly Eastern Europe and South America. For this study, in 2013, 24 cattle from three farms in three regions of Moldova were screened by ELISA and nested PCR. Of these cattle, 14 which were PCR positive, and these were molecularly characterized based on the nucleotide sequence of the env gene and the deduced amino acid sequence of the encoded gp51 protein...
June 2017: Archives of Virology
https://www.readbyqxmd.com/read/28159666/development-of-a-recombinase-polymerase-amplification-lateral-flow-dipstick-rpa-lfd-for-the-field-diagnosis-of-caprine-arthritis-encephalitis-virus-caev-infection
#13
Po-An Tu, Jia-Shian Shiu, Shu-Hwae Lee, Victor Fei Pang, De-Chi Wang, Pei-Hwa Wang
Caprine arthritis-encephalitis (CAE) in goats is a complex disease syndrome caused by a lentivirus. This persistent viral infection results in arthritis in adult goats and encephalitis in lambs. The prognosis for the encephalitic form is normally poor, and this form of the disease has caused substantial economic losses for goat farmers. Hence, a more efficient detection platform based on recombinase polymerase amplification (RPA) and a lateral flow dipstick (LFD) was developed in the present study for detecting the proviral DNA of caprine arthritis-encephalitis virus (CAEV)...
May 2017: Journal of Virological Methods
https://www.readbyqxmd.com/read/28025710/clinical-and-subclinical-bovine-leukemia-virus-infection-in-a-dairy-cattle-herd-in-zambia
#14
Girja S Pandey, Edgar Simulundu, Danstan Mwiinga, Kenny L Samui, Aaron S Mweene, Masahiro Kajihara, Alfred Mangani, Racheal Mwenda, Joseph Ndebe, Satoru Konnai, Ayato Takada
Bovine leukemia virus (BLV) causes enzootic bovine leucosis (EBL) and is responsible for substantial economic losses in cattle globally. However, information in Africa on the disease is limited. Here, based on clinical, hematological, pathological and molecular analyses, two clinical cases of EBL were confirmed in a dairy cattle herd in Zambia. In contrast, proviral DNA was detected by PCR in five apparently healthy cows from the same herd, suggesting subclinical BLV infection. Phylogenetic analysis of the env gene showed that the identified BLV clustered with Eurasian genotype 4 strains...
April 2017: Archives of Virology
https://www.readbyqxmd.com/read/27938679/single-n-glycosylation-site-of-bovine-leukemia-virus-su-is-involved-in-conformation-and-viral-escape
#15
Giorgia Rizzo, Katia Forti, Anna Serroni, Monica Cagiola, Sara Baglivo, Eleonora Scoccia, Antonio De Giuseppe
The bovine leukaemia virus (BLV) envelope protein (Env) is synthesized as a polyprotein precursor (gp72) proteolytically cleaved into the mature surface (SU) and transmembrane (TM) glycoproteins. The amino-terminal region of SU contains conformational epitopes F, G and H, which require a glycosylated SU to be recognized by monoclonal antibodies (MAbs) and antibodies from BLV-infected cattle. The SU contains eight asparagine (N) residues that are putative N-glycosylation sites. The N129, N203, N230 and N251 appear involved in carbohydrate binding, play an essential role in the in vitro infection...
December 25, 2016: Veterinary Microbiology
https://www.readbyqxmd.com/read/27892856/co-infection-with-mycobacterium-bovis-does-not-alter-the-response-to-bovine-leukemia-virus-in-bola-drb3-0902-genetically-resistant-cattle
#16
Claudia M Lützelschwab, Agustina Forletti, Rosana Cepeda, Eduardo N Esteban, Omar Confalonieri, Silvina E Gutiérrez
High proviral load (HPL) profile in bovine leukemia virus infected animals poses increased risk of transmission, and development of HPL or low proviral load (LPL) profile may be attributed to host genetics. Genetic resistance and susceptibility has been mapped to the Major Histocompatibility Complex class II DRB3 gene (BoLA DRB3). The aim of this work was to determine the effect of Mycobacterium bovis infection on certain virological and host immunological parameters of BLV experimental infection. Twenty-six Argentinian Holstein calves carrying the resistance-associated marker allele BoLA DRB3*0902, susceptibility-associated marker allele BoLA DRB3*1501, or neutral BoLA DRB3 alleles, exposed to M...
December 2016: Research in Veterinary Science
https://www.readbyqxmd.com/read/27863543/reduced-humoral-immunity-and-atypical-cell-mediated-immunity-in-response-to-vaccination-in-cows-naturally-infected-with-bovine-leukemia-virus
#17
Meredith C Frie, Kelly R Sporer, Joseph C Wallace, Roger K Maes, Lorraine M Sordillo, Paul C Bartlett, Paul M Coussens
Bovine leukemia virus (BLV) is a retrovirus that is widely distributed across US dairy herds: over 83% of herds are BLV-infected and within-herd infection rates can approach 50%. BLV infection reduces both animal longevity and milk production and can interfere with normal immune health. With such a high prevalence of BLV infection in dairy herds, it is essential to understand the circumstances by which BLV negatively affects the immune system of infected cattle. To address this question, BLV- and BLV+ adult, lactating Holstein dairy cows were vaccinated with Bovi-Shield GOLD(®) FP(®) 5 L5 HB and their immune response to vaccination was measured over the course of 28days...
December 2016: Veterinary Immunology and Immunopathology
https://www.readbyqxmd.com/read/27814725/whole-genome-sequencing-of-51-breast-cancers-reveals-that-tumors-are-devoid-of-bovine-leukemia-virus-dna
#18
Nicolas A Gillet, Luc Willems
Controversy exists regarding the association of bovine leukemia virus (BLV) and breast cancer. PCR-based experimental evidence indicates that BLV DNA is present in breast tissue and that as many as 37% of cancer cases may be attributable to viral exposure. Since this association might have major consequences for human health, we evaluated 51 whole genomes of breast cancer samples for the presence of BLV DNA. Among 32 billion sequencing reads retrieved from the NCBI database of genotype and phenotype, none mapped on different strains of the BLV genome...
November 4, 2016: Retrovirology
https://www.readbyqxmd.com/read/27812893/microarray-analysis-of-differential-gene-expression-profiles-in-blood-cells-of-naturally-blv-infected-and-uninfected-holstein-friesian-cows
#19
P Brym, S Kamiński
The aim of the present study was to examine gene expression changes in response to bovine leukemia virus (BLV) infection, in an effort to determine genes that take a part in molecular events leading to persistent lymphocytosis (PL), and to better define genes involved in host response to BLV infection. Using bovine 70-mer oligonucleotide spotted microarrays (BLOPlus) and qRT-PCR validation, we studied global gene expression profiles in blood cells in vivo of 12 naturally BLV-infected Polish Holstein cows, and 12 BLV non-infected controls of the same breed and reared in herds with high BLV seroprevalence...
February 2017: Molecular Biology Reports
https://www.readbyqxmd.com/read/27771791/the-molecular-epidemiological-study-of-bovine-leukemia-virus-infection-in-myanmar-cattle
#20
Meripet Polat, Hla Hla Moe, Takeshi Shimogiri, Kyaw Kyaw Moe, Shin-Nosuke Takeshima, Yoko Aida
Bovine leukemia virus (BLV) is the etiological agent of enzootic bovine leukosis, which is the most common neoplastic disease of cattle. BLV infects cattle worldwide and affects both health status and productivity. However, no studies have examined the distribution of BLV in Myanmar, and the genetic characteristics of Myanmar BLV strains are unknown. Therefore, the aim of this study was to detect BLV infection in Myanmar and examine genetic variability. Blood samples were obtained from 66 cattle from different farms in four townships of the Nay Pyi Taw Union Territory of central Myanmar...
February 2017: Archives of Virology
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