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Our results suggest that a " felinized " pig kidney can be generated for the treatment of CKD in cats in the future.

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Cell lines derived from feline fibrosarcoma display unstable chromosomal aneuploidy and additionally centrosome number aberrations. The purpose of the study was to evaluate clonality and presence of numerical chromosomal and centrosomal aberrations in 5 established feline fibrosarcoma cell lines and in a fetal dermal fibroblast cell line as a control.

The clonality of all cell lines was examined using limited-dilution cloning. The number of chromosomes was counted in metaphase spreads. Monoclonal cell populations could be established from all cell lines. Centrosome hyperamplification was observed in all 5 feline fibrosarcoma cell lines with a proportion of cells 5.

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In the control cell line , only 0. In conclusion, the examinations revealed that centrosome hyperamplification occurs in feline fibrosarcoma cell lines.

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The feline fibrosarcoma cell lines possessed 10 to 25 times as many cells with centrosome hyperamplification as the control cell line. These observations suggest an association of numerical centrosome aberrations with karyotype instability by increasing the frequency of chromosome missegregation. The results of this study may be helpful for further characterization of feline fibrosarcomas and may contribute to the knowledge of cytogenetic factors that may be important for the pathogenesis of feline fibrosarcomas. Contamination of infectious RD virus in vaccines produced using non- feline cell lines.

All domestic cats have a replication-competent endogenous retrovirus, termed RD virus, in their genome and several feline cell lines produce RD viruses. Recently, we found that a portion of live attenuated feline and canine vaccines produced using feline cell lines was contaminated with infectious RD viruses. In this study, we expanded our survey and examined canine vaccines produced using 'non- feline ' cell lines.

It is impossible to investigate the definitive cause of contamination with RD virus; however, we suspect that a seed canine parvovirus type 2 was contaminated with RD virus, because many canine parvoviruses have been isolated and attenuated using feline cell lines. To exclude RD virus from live attenuated vaccines, we must pay attention to the contamination of seed viruses with RD virus in addition to avoiding feline cell lines producing RD virus when manufacturing vaccines.

Published by Elsevier Ltd. All rights reserved. PubMed Central. Fibrosarcoma is a deadly disease in cats and is significantly more often located at classical vaccine injections sites. More rare forms of spontaneous non-vaccination site NSV fibrosarcomas have been described and have been found associated to genetic alterations.

Cats Have Staff: The Saffi & Misa Diaries

Purpose of this study was to compare the efficacy of adenoviral gene transfer in NVS fibrosarcoma. We isolated and characterized a NVS fibrosarcoma cell line Cocca-6A from a spontaneous fibrosarcoma that occurred in a domestic calico cat. The feline cells were karyotyped and their chromosome number was counted using a Giemsa staining.

Adenoviral gene transfer was verified by western blot analysis.

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Flow cytometry assay and Annexin-V were used to study cell -cycle changes and cell death of transduced cells. Cocca-6A fibrosarcoma cells were morphologically and cytogenetically characterized. Giemsa block staining of metaphase spreads of the Cocca-6A cells showed deletion of one of the E1 chromosomes, where feline p53 maps. Therapy for feline fibrosarcomas is often insufficient for long lasting tumor eradication.

More gene transfer studies should be conducted in order to understand if these viral vectors could be applicable regardless the origin spontaneous vs. Targeting a newly established spontaneous feline fibrosarcoma cell line by gene transfer.

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Establishment of a novel feline leukemia virus FeLV -negative B- cell cell line from a cat with B- cell lymphoma. We established a novel feline B- cell line , MS4, from the neoplastic pleural effusion of a cat with cutaneous B- cell lymphoma. The MS4 cell line is the first FeLV-negative feline B- cell lymphoma cell line , and may be used to investigate the pathogenesis of spontaneously occurring feline lymphoma and the development of new therapies.

Differences in Env and Gag protein expression patterns and epitope availability in feline immunodeficiency virus infected PBMC compared to infected and transfected feline model cell lines. Env and Gag are key components of the FIV virion that are targeted to the plasma membrane for virion assembly. They are both important stimulators and targets of anti-FIV immunity.

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A kinetic follow up of Gag and Env expression showed a polarization of both Gag and Env expression to specific sites at the plasma membrane of PBMC, but not in other cell lines. In conclusion, mature trimeric cell surface expressed Env might be antigenically distinct from intracellular monomeric Env in PBMC and might possibly be unrecognizable by feline humoral immunity. In addition, Env expression is restricted to a small area on the plasma membrane and co-localizes with a large moiety of Gag, which may represent a preferred FIV budding site, or initiation of virological synapses with direct cell-to-cell virus transmission.

Published by Elsevier B. Derivation of feline vaccine-associated fibrosarcoma cell line and its growth on chick embryo chorioallantoic membrane - a new in vivo model for veterinary oncological studies. Feline vaccine associated fibrosarcomas are the second most common skin tumor in cats. Methods of treatment are: surgery, chemotherapy and radiotherapy. Nevertheless, the usage of cytostatics in feline vaccine associated sarcoma therapy is limited due to their adverse side effects, high toxicity and low biodistribution after i.

Therefore, much research on new therapeutic drugs is being conducted. In human medicine, the chick embryo chorioallantoic membrane CAM model is used as a cheap and easy to perform assay to assess new drug effectiveness in cancer treatment. Various human cell lines have different tumors growth on CAM. In veterinary medicine such model has not been described yet. In the present article derivation of feline vaccine associated fibrosarcoma cell line and its growth on CAM is described.

The cell line and the tumor grown were confirmed by histopathological and immunohistochemical examination. As far as we believe, this is the first attempt to create such model, which may be used for further in vivo studies in veterinary oncology. Canine and feline host ranges of canine parvovirus and feline panleukopenia virus: distinct host cell tropisms of each virus in vitro and in vivo. Canine parvovirus CPV emerged as an apparently new virus during the mids. The origin of CPV is unknown, but a variation from feline panleukopenia virus FPV or another closely related parvovirus is suspected.

Examination of three canine and six feline cell lines and mitogen-stimulated canine and feline peripheral blood lymphocytes revealed that CPV replicates in both canine and feline cells , whereas FPV replicates efficiently only in feline cells. The in vivo host ranges were unexpectedly complex and distinct from the in vitro host ranges. Inoculation of dogs with FPV revealed efficient replication in the thymus and, to some degree, in the bone marrow, as shown by virus isolation, viral DNA recovery, and Southern blotting and by strand-specific in situ hybridization.

FPV replication could not be demonstrated in mesenteric lymph nodes or in the small intestine, which are important target tissues in CPV infection. Although CPV replicated well in all the feline cells tested in vitro, it did not replicate in any tissue of cats after intramuscular or intravenous inoculation. These results indicate that these viruses have complex and overlapping host ranges and that distinct tissue tropisms exist in the homologous and heterologous hosts.

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Images PMID A heterologous feline immunodeficiency virus FIV expression system permitted high-level expression of FIV proteins and efficient production of infectious FIV in human cells. These results identify the FIV U3 element as the sole restriction to the productive phase of replication in nonfeline cells.

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Heterologous FIV expression in a variety of human cell lines resulted in profuse syncytial lysis that was FIV env specific, CD4 independent, and restricted to cells that express CXCR4, the coreceptor for T- cell-line -adapted strains of human immunodeficiency virus. The use of CXCR4 is a fundamental feature of lentivirus biology independent of CD4 and a shared cellular link to infection and cytopathicity for distantly related lentiviruses that cause AIDS. Their conserved use implicates chemokine receptors as primordial lentivirus receptors.

Human and feline adipose-derived mesenchymal stem cells have comparable phenotype, immunomodulatory functions, and transcriptome. Adipose-derived mesenchymal stem cells ASCs are a promising cell therapy to treat inflammatory and immune-mediated diseases. Development of appropriate pre-clinical animal models is critical to determine safety and attain early efficacy data for the most promising therapeutic candidates.