Lymphosarcoma Animals
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. O papel das células T reguladoras na paracoccidioidomicose pulmunar de camundongos susceptíveis e resistentes ao Paracoccidioides brasiliensis. / The role of regulatory T cells in the pulmonary paracoccidioidomycosis of susceptible and resistant mice to Paracoccidioides brasiliensis.
Um mecanismo de tolerância periférica estudado é mediado por células T reguladoras (Tregs) que expressa o marcador CD25 e o fator de transcrição FoxP3. Estudamos o papel das Tregs nos fenômenos de imunossupressão na resistência e susceptibilidade genética dos hospedeiros contra o fungo. Animais A/J e B10.A foram depletados de células CD25 e outro
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/06/2011
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2. Disgerminoma bilateral e hiperplasia endometrial cística com piometra em cadela = Bilateral Dysgerminoma and Cystic Endometrial Hyperplasia with Pyometra in a bitch / Bilateral Dysgerminoma and Cystic Endometrial Hyperplasia with Pyometra in a Bitch
Background: Ovarian tumors are considered rare both in dogs and cats. Germ cell neoplasms correspond to approximately 15% of the cases and can be classified into dysgerminomas, teratomas and teratocarcinomas. Reports of bilateral dysgerminoma in dogs and cats are rare. The aim of this work was to describe a case of bilateral dysgerminoma and cystic endometri
Publicado em: 2011
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3. Bovine leukemia virus gene expression in vivo.
The in vivo transcriptional status of bovine leukemia virus was assessed at three stages of infection during the progression of the disease: aleukemic stage, persistent lymphocytosis, and leukemia/lymphosarcoma. Bovine leukemia virus transcripts could be amplified from total or cytoplasmic enriched lymphocyte RNA by reverse transcription polymerase chain rea
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4. Biochemical and immunological characterization of the major envelope glycoprotein of bovine leukemia virus.
The major envelope glycoprotein of bovine leukemia virus was isolated by lectin-bound Sepharose and DEAE-cellulose column chromatography. This protein was shown to have a molecular weight of about 41,000 and to lack detectable immunological cross-reactivity with glycoproteins of other oncornaviruses. Sera obtained from 100% of cattle examined with clinically
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5. Increased interleukin-10 mRNA expression in tumor-bearing or persistently lymphocytotic animals infected with bovine leukemia virus.
Interleukin-10 (IL-10), produced by Th2 helper T cells, B cells, and macrophages, can inhibit cytokine production by Th1 cells and enhance B-cell proliferation and differentiation. Here, we show that peripheral blood mononuclear cells (PBMCs) from bovine leukemia virus-infected animals with late-stage disease express considerably more IL-10 mRNA than animals
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6. Interleukin-12 p40 mRNA Expression in Bovine Leukemia Virus-Infected Animals: Increase in Alymphocytosis but Decrease in Persistent Lymphocytosis
Interleukin-12 (IL-12), a key cytokine in immune regulation, has an important role in activating the cell-mediated immune response in infectious diseases. Recently, a dichotomy between IL-12 and IL-10 regarding progression of a variety diseases has emerged. IL-12 activates type 1 cytokine production and has an antagonistic effect on type 2 cytokines. Here, b
American Society for Microbiology.
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7. Tumorigenic potential of a myc-containing strain of feline leukemia virus in vivo in domestic cats.
The oncogenic capacity of a myc-containing strain of feline leukemia virus (FeLV), termed LC-FeLV, has been examined after inoculation of the virus into neonatal kittens. Like other myc-containing strains of FeLV, LC-FeLV may induce with relatively short latency, but does not necessarily induce, thymic lymphosarcoma in viremic animals. Naturally occurring an
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8. Polyclonal bovine sera but not virus-neutralizing monoclonal antibodies block bovine leukemia virus (BLV) gp51 binding to recombinant BLV receptor BLVRcp1.
Bovine leukemia virus (BLV), a transactivating lymphotropic retrovirus, is the etiologic agent of enzootic lymphosarcoma or leukemia in cattle. Sera from BLV-infected animals possess high BLV-neutralizing antibody titres. The availability of the recombinant BLV receptor candidate, BLVRcp1, allowed us to determine a mechanism of virus neutralization by polycl
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9. Bovine Leukemia Virus-Induced Persistent Lymphocytosis in Cattle Does Not Correlate with Increased Ex Vivo Survival of B Lymphocytes
Bovine leukemia virus (BLV) is an oncogenic retrovirus associated with B-cell lymphocytosis, leukemia, and lymphosarcoma in the ovine and bovine species. We have recently reported that in sheep, BLV protects the total population of peripheral blood mononuclear cells (PBMCs) from ex vivo spontaneous apoptosis. This global decrease in the apoptosis rates resul
American Society for Microbiology.
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10. Complete Bovine Leukemia Virus (BLV) Provirus Is Conserved in BLV-Infected Cattle throughout the Course of B-Cell Lymphosarcoma Development
Bovine leukemia virus (BLV) and human T-cell leukemia virus types 1 and 2 (HTLV-1 and HTLV-2) belong to the same subfamily of oncoviruses. Defective HTLV-1 proviral genomes have been found in more than half of all patients with adult T-cell leukemia examined. We have characterized the genomic structure of integrated BLV proviruses in peripheral blood lymphoc
American Society for Microbiology.
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11. Insertional mutagenesis of flvi-2 in tumors induced by infection with LC-FeLV, a myc-containing strain of feline leukemia virus.
LC-FeLV is a myc-containing strain of feline leukemia virus (FeLV) which exhibits only partial transforming activity in vitro and in vivo. LC-FeLV infection in kittens may induce, but does not necessarily induce, thymic lymphosarcoma in viremic animals after a short latency. These observations suggest that infection with LC-FeLV is not sufficient to induce c
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12. Discordance between Bovine Leukemia Virus Tax Immortalization In Vitro and Oncogenicity In Vivo
Bovine leukemia virus (BLV) Tax protein, a transcriptional activator of viral expression, is essential for viral replication in vivo. Tax is believed to be involved in leukemogenesis because of its second function, immortalization of primary cells in vitro. These activities of Tax can be dissociated on the basis of point mutations within specific regions of
American Society for Microbiology.