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Canine T cells

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https://www.readbyqxmd.com/read/28735673/pneumonia-due-to-talaromyces-marneffei-in-a-dog-from-southern-brazil-with-concomitant-canine-distemper-virus-infection
#1
S A Headley, L G Pretto-Giordano, S C Lima, W G Suhett, A H T Pereira, L A Freitas, S A Suphoronski, T E S Oliveira, A F Alfieri, E C Pereira, L A Vilas-Boas, A A Alfieri
The pathological and molecular findings associated with Talaromyces marneffei-induced pneumonia with concomitant infection by canine distemper virus (CDV) are described in a dog. The principal pathological alteration occurred in the lungs. Histopathology confirmed multifocal granulomatous pneumonia associated with numerous intralesional and intracellular septate fission cells consistent with T. marneffei. A molecular assay designed to amplify a partial fragment of the 18S rRNA gene of T. marneffei provided positive results from two fungal cultures derived from the lung...
July 2017: Journal of Comparative Pathology
https://www.readbyqxmd.com/read/28735665/prevalence-of-foxp3-cells-does-not-correlate-with-ki67-expression-in-canine-diffuse-large-b-cell-lymphoma
#2
C F Muir, S L Priestnall, A Hibbert, C Brown, O A Garden, T Scase
Diffuse large B-cell lymphoma (DLBCL) is the most common type of canine lymphoma and survival times are currently <1 year. Manipulation of the tumour microenvironment, of which the regulatory T cell (Treg) is a principal player, represents a potentially exciting way to curb the rapid proliferation of neoplastic cells. Tregs, characterized by the stable expression of the transcription factor FoxP3, suppress innate and adaptive arms of the immune response and represent a potential therapeutic target within neoplastic lymph nodes...
July 2017: Journal of Comparative Pathology
https://www.readbyqxmd.com/read/28714087/clinical-and-pathological-classification-of-canine-intraocular-lymphoma
#3
Matthew R Lanza, Ayla R Musciano, Richard D Dubielzig, Amy C Durham
The objectives of this retrospective study of 100 dogs with intraocular lymphoma were to describe the histomorphologic and immunohistochemical features of canine intraocular lymphoma, determine the proportion of cases with presumed solitary ocular lymphoma (PSOL) compared to multicentric disease, and assess the clinical outcomes of these patients. Selected cases from Penn Vet Diagnostic Laboratory and Comparative Ocular Pathology Lab of Wisconsin (2004-2015) were evaluated and subtyped using the WHO classification system...
July 17, 2017: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/28712929/exosomes-from-osteosarcoma-and-normal-osteoblast-differ-in-proteomic-cargo-and-immunomodulatory-effects-on-t-cells
#4
Ryan M Troyer, Carl E Ruby, Cheri P Goodall, Liping Yang, Claudia S Maier, Hassan A Albarqi, Jacqueline V Brady, Kallan Bathke, Oleh Taratula, Dan Mourich, Shay Bracha
BACKGROUND: Canine osteosarcoma (OSA) is the most common cancer of the appendicular skeleton and is associated with high metastatic rate to the lungs and poor prognosis. Recent studies have shown the impact of malignant-derived exosomes on immune cells and the facilitation of immune evasion. In the current study, we have characterized the proteomic profile of exosomes derived from healthy osteoblasts and osteosarcoma cell lines. We investigated the direct impact of these exosomes on healthy T cells...
July 13, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28677267/thirteen-novel-canine-dog-leukocyte-antigen-88-alleles-identified-by-sequence-based-typing
#5
G M Venkataraman, L J Kennedy, M-T E Little, S S Graves, M A Harkey, B J Torok-Storb, R Storb
Major histocompatibility complex (MHC) genes in mammals include highly polymorphic class I and class II genes that are critical for donor-recipient matching for transplantation. Dogs have served as an effective, directly translatable model for stem/progenitor cell transplantation. Previous analyses of MHC class I genes in dogs point to a single highly polymorphic gene, dog leukocyte antigen (DLA)-88, as an important factor in the success or failure of hematopoietic stem cell transplants. Fifty-nine DLA-88 alleles have been identified and reported so far...
July 5, 2017: HLA
https://www.readbyqxmd.com/read/28676737/gene-therapy-in-a-large-animal-model-of-pde6a-retinitis-pigmentosa
#6
Freya M Mowat, Laurence M Occelli, Joshua T Bartoe, Kristen J Gervais, Ashlee R Bruewer, Janice Querubin, Astra Dinculescu, Sanford L Boye, William W Hauswirth, Simon M Petersen-Jones
Despite mutations in the rod phosphodiesterase 6-alpha (PDE6A) gene being well-recognized as a cause of human retinitis pigmentosa, no definitive treatments have been developed to treat this blinding disease. We performed a trial of retinal gene augmentation in the Pde6a mutant dog using Pde6a delivery by capsid-mutant adeno-associated virus serotype 8, previously shown to have a rapid onset of transgene expression in the canine retina. Subretinal injections were performed in 10 dogs at 29-44 days of age, and electroretinography and vision testing were performed to assess functional outcome...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28671070/effect-of-canine-mesenchymal-stromal-cells-loaded-with-paclitaxel-on-growth-of-canine-glioma-and-human-glioblastoma-cell-lines
#7
A Bonomi, E Ghezzi, L Pascucci, M Aralla, V Ceserani, L Pettinari, V Coccè, A Guercio, G Alessandri, E Parati, A T Brini, O Zeira, A Pessina
This study investigated whether canine mesenchymal stromal cells (cMSCs) are able to take up and release paclitaxel (PTX) in active form, and therefore whether they have potential as a tool for therapeutic delivery of this drug. cMSCs from bone marrow and adipose tissue were isolated, expanded and characterised phenotypically. cMSCs were loaded with PTX (cMSCs-PTX) and their capacity for release of PTX was determined by their effect on proliferation of cancer cells. cMSCs-PTX derived from bone marrow and adipose tissue were able to take up and then release active PTX...
May 2017: Veterinary Journal
https://www.readbyqxmd.com/read/28668303/ca-2-activated-cl-current-is-antiarrhythmic-by-reducing-both-spatial-and-temporal-heterogeneity-of-cardiac-repolarization
#8
Bence Hegyi, Balázs Horváth, Krisztina Váczi, Mónika Gönczi, Kornél Kistamás, Ferenc Ruzsnavszky, Roland Veress, Leighton T Izu, Ye Chen-Izu, Tamás Bányász, János Magyar, László Csernoch, Péter P Nánási, Norbert Szentandrássy
The role of Ca(2+)-activated Cl(-) current (ICl(Ca)) in cardiac arrhythmias is still controversial. It can generate delayed afterdepolarizations in Ca(2+)-overloaded cells while in other studies incidence of early afterdepolarization (EAD) was reduced by ICl(Ca). Therefore our goal was to examine the role of ICl(Ca) in spatial and temporal heterogeneity of cardiac repolarization and EAD formation. Experiments were performed on isolated canine cardiomyocytes originating from various regions of the left ventricle; subepicardial, midmyocardial and subendocardial cells, as well as apical and basal cells of the midmyocardium...
August 2017: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/28665893/the-use-of-ex-vivo-generated-regulatory-t-cell-preparations-in-a-canine-lung-allograft-model
#9
Kraig V Abrams, Billanna Hwang, Richard A Nash, George E Georges, Wayne Lamm, Barry Storer, David K Madtes, Robert Glenny, Michael S Mulligan
No abstract text is available yet for this article.
June 29, 2017: Transplantation
https://www.readbyqxmd.com/read/28655291/naturally-acquired-canine-herpesvirus-associated-meningoencephalitis
#10
Mason C Jager, Erica A Sloma, Morgan Shelton, Andrew D Miller
Canid alphaherpesvirus 1 (CHV) causes morbidity and mortality in susceptible puppies. While the neuropathology of experimentally infected puppies has been detailed, characterization of naturally acquired infections is limited. The aim of this study was to describe the histologic, immunohistochemical, and in situ hybridization features of CHV encephalitis in the dog. Six female and 11 male puppies ranging in age from stillborn to 57 days old were included. Histologically, lesions included multifocal glial nodules (16/17, 94%), meningeal infiltrates (15/17, 88%), and cerebellar cortical necrosis (6/9, 67%); however, robust inflammation was not a significant feature in any of the cases...
January 1, 2017: Veterinary Pathology
https://www.readbyqxmd.com/read/28621057/prospective-evaluation-of-toceranib-phosphate-in-metastatic-canine-osteosarcoma
#11
T Laver, C A London, D M Vail, B J Biller, J Coy, D H Thamm
Efficacious therapies for measurable metastatic canine osteosarcoma (OSA) are generally lacking. Preliminary retrospective studies suggested that approximately 50% of dogs with measurable metastatic OSA experienced clinical benefit (objective response or clinically meaningful disease stabilisation) following toceranib (TOC) treatment. The purpose of this clinical trial was to prospectively evaluate the clinical outcome following TOC treatment in dogs with measurable pulmonary metastatic OSA. A secondary goal was to identify potential biomarkers of clinical benefit by measuring changes in plasma vascular endothelial growth factor (VEGF) and circulating regulatory T-cell (Treg) percentage...
June 15, 2017: Veterinary and Comparative Oncology
https://www.readbyqxmd.com/read/28620374/canine-macrophage-dh82-cell-line-as-a-model-to-study-susceptibility-to-trypanosoma-cruzi-infection
#12
Pedro Henrique Braz Mendonça, Raphael Francisco Dutra Barbosa da Rocha, Julliane Brito de Braz Moraes, Isabel Ferreira LaRocque-de-Freitas, Jorgete Logullo, Alexandre Morrot, Marise Pinheiro Nunes, Celio Geraldo Freire-de-Lima, Debora Decote-Ricardo
Trypanosoma cruzi is an obligatory intracellular protozoan parasite, and it is the etiological agent of Chagas' disease that is endemic in the Americas. In addition to humans, a wide spectrum of mammals can be infected by T. cruzi, including dogs. Dogs develop acute and chronic disease, similar to human infection. T. cruzi can infect almost all cell types and after cell invasion, the metacyclics trypomastigotes localize in the cytoplasm, where they transform into amastigotes, the replicative form of T. cruzi in mammals...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28615132/identification-of-a-secondary-mutation-in-the-kit-kinase-domain-correlated-with-imatinib-resistance-in-a-canine-mast-cell-tumor
#13
Yuko Nakano, Masato Kobayashi, Makoto Bonkobara, Masamine Takanosu
Imatinib-resistance is a major therapeutic problem in human chronic myeloid leukemia, human gastrointestinal stromal tumors, and canine mast cell tumors. In the present study, we identified the secondary mutation c.2006C>T in c-KIT exon 14 in a mast cell tumor obtained from a dog carrying c.1663-1671del in exon 11 and showing resistance to imatinib. The mutation in exon 14 resulted in substitution of threonine with isoleucine at position 669, which was located at the center of the ATP binding site as a gatekeeper and played an important role in binding to imatinib...
June 2017: Veterinary Immunology and Immunopathology
https://www.readbyqxmd.com/read/28608404/apoptotic-intrinsic-pathway-proteins-predict-survival-in-canine-cutaneous-mast-cell-tumours
#14
C N Barra, B M Macedo, K G Cadrobbi, L H Pulz, G C Huete, S R Kleeb, J G Xavier, J L Catão-Dias, A T Nishiya, H Fukumasu, R F Strefezzi
Mast cell tumours (MCTs) are the most frequent canine round cell neoplasms and show variable biological behaviours with high metastatic and recurrence rates. The disease is treated surgically and wide margins are recommended. Adjuvant chemotherapy and radiotherapy used in this disease cause DNA damage in neoplastic cells, which is aimed to induce apoptotic cell death. Resisting cell death is a hallmark of cancer, which contributes to the development and progression of tumours. The aim of this study was to investigate the expression of the proteins involved in the apoptotic intrinsic pathway and to evaluate their potential use as prognostic markers for canine cutaneous MCTs...
June 13, 2017: Veterinary and Comparative Oncology
https://www.readbyqxmd.com/read/28596005/characterization-of-keratin-microparticles-from-feather-biomass-with-potent-antioxidant-and-anticancer-activities
#15
Swati Sharma, Arun Gupta, Syed Mohd S T Chik, Chua Geek Kee, Bhupendra M Mistry, Doo H Kim, Gaurav Sharma
In the present study chicken feathers were hydrolyzed by chemical treatment in alkaline conditions. The pH value of feather hydrolyzed solution was amended accordingly the iso-electric precipitation. Two types of keratin microparticles KM1, KM2 were synthesized under acidic conditions at 3.5 and 5.5pH respectively. The synthesized keratin microparticles possessed uniform and round surface by scanning electron microscopy (SEM). The thermal degradation of microparticles were examined by thermogravimetry (TGA)...
June 10, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28595579/omental-adipose-tissue-is-a-more-suitable-source-of-canine-mesenchymal-stem-cells
#16
Francisca Bahamondes, Estefania Flores, Gino Cattaneo, Flavia Bruna, Paulette Conget
BACKGROUND: Mesenchymal Stem Cells (MSCs) are a promising therapeutic tool in veterinary medicine. Currently the subcutaneous adipose tissue is the leading source of MSCs in dogs. MSCs derived from distinct fat depots have shown dissimilarities in their accessibility and therapeutic potential. The aims of our work were to determine the suitability of omental adipose tissue as a source of MSCs, according to sampling success, cell yield and paracrine properties of isolated cells, and compared to subcutaneous adipose tissue...
June 8, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28592719/effects-of-toceranib-phosphate-palladia-monotherapy-on-multidrug-resistant-lymphoma-in-dogs
#17
Hiroki Yamazaki, Naoki Miura, Yu-Chang Lai, Masashi Takahashi, Yuko Goto-Koshino, Momoi Yasuyuki, Munekazu Nakaichi, Hajime Tsujimoto, Asuka Setoguchi, Yasuyuki Endo
We examined whether multidrug resistant (MDR) canine lymphoma increases gene expression for platelet-derived growth factor receptor α (PDGFRα), vascular endothelial growth factor receptor 2 (VEGFR2), and c-KIT, and whether toceranib phosphate (TOC) has potential as a treatment for MDR canine lymphoma. The clinical data showed that PDGFRα expression was higher in canine subjects with MDR T-cell lymphoma than in those with untreated T-cell lymphoma, and that c-KIT expression was greater in subjects with T-cell lymphoma than in those with B-cell lymphoma...
June 6, 2017: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/28579026/a-flow-cytometric-assessment-of-the-lymphocyte-immunophenotypes-in-dogs-naturally-infected-with-babesia-rossi
#18
Yolandi Rautenbach, Amelia Goddard, Peter N Thompson, Richard J Mellanby, Andrew L Leisewitz
Immunity to Babesia infection requires both innate and acquired responses, including cell mediated- and humoral responses. The aims of this study were to investigate the variation in selected peripheral blood lymphocyte phenotypes in dogs with virulent babesiosis at presentation and over time after treatment, and to determine whether these were correlated with the severity of clinical signs. Forty-four dogs naturally infected with B. rossi were studied and 5 healthy dogs were included as controls. Blood samples were collected from the jugular vein at admission, prior to any treatment, and at 24h and 48-72h...
July 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28574903/hsct-based-approaches-for-tolerance-induction-in-renal-transplant
#19
Anita Y Chhabra, Joseph Leventhal, Andrea R Merchak, Suzanne Ildstad
Renal transplantation has become the preferred treatment for end stage kidney failure. Although short-term graft survival has significantly improved as advances in immunosuppression have occurred, long term patient and graft survival have not. Approximately only 50% of renal transplant recipients are alive at 10 years due to the toxicities of immunosuppression and alloimmunity. Emerging research on cell-based therapies is opening a new door for patients to receive the organs they need without sacrificing quality of life and longevity because of drug based immunosuppression...
June 1, 2017: Transplantation
https://www.readbyqxmd.com/read/28566164/cervical-spinal-cord-and-motor-unit-pathology-in-a-canine-model-of-sod1-associated-amyotrophic-lateral-sclerosis
#20
Martin L Katz, Cheryl A Jensen, Jeffrey T Student, Gayle C Johnson, Joan R Coates
Development of effective treatments for amyotrophic lateral sclerosis (ALS) would be facilitated by identification of early events in the pathological cascade of disease progression. Degenerative myelopathy (DM), a naturally occurring disease in dogs, is quite similar to forms of ALS associated with SOD1 mutations and is likely to be a good model for these forms of the human disease. The sequence of histopathological changes that occur in DM was characterized by analyzing tissue samples obtained from affected dogs euthanized at various stages of disease progression...
July 15, 2017: Journal of the Neurological Sciences
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