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Veterinary and Comparative Oncology

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https://www.readbyqxmd.com/read/28643878/frameless-stereotactic-radiotherapy-alone-and-combined-with-temozolomide-for-presumed-canine-gliomas
#1
M Dolera, L Malfassi, C Bianchi, N Carrara, S Finesso, S Marcarini, G Mazza, S Pavesi, M Sala, G Urso
We evaluated stereotactic volume modulated arc radiotherapy (VMAT) for canine gliomas, alone (radiotherapy [RT]) and in combination with temozolomide (RT + TMZ), compared with palliation. Overall and disease-specific survival times were estimated. Thirty dogs were palliated, 22 dogs were treated with RT and 20 with RT + TMZ. Complete and partial responses were observed in 63.2% and 90.9% of patients in the RT and RT + TMZ arms, respectively, that were alive at 1 year. Median survival in the palliation arm was 94 days (95% conformity index [CI] 87÷101)...
June 23, 2017: Veterinary and Comparative Oncology
https://www.readbyqxmd.com/read/28620942/a-dose-escalation-study-of-combretastatin-a4-phosphate-in-healthy-dogs
#2
E Abma, P Smets, S Daminet, I Cornelis, K De Clercq, Y Ni, L Vlerick, H de Rooster
Combretastatin A4-Phosphate (CA4P) is a vascular disrupting agent revealing promising results in cancer treatments for humans. The aim of this study was to investigate the safety and adverse events of CA4P in healthy dogs as a prerequisite to application of CA4P in dogs with cancer. Ten healthy dogs were included. The effects of escalating doses of CA4P on physical, haematological and biochemical parameters, systolic arterial blood pressure, electrocardiogram, echocardiographic variables and general wellbeing were characterised...
June 16, 2017: Veterinary and Comparative Oncology
https://www.readbyqxmd.com/read/28621057/prospective-evaluation-of-toceranib-phosphate-in-metastatic-canine-osteosarcoma
#3
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/28621004/epirubicin-in-the-treatment-of-canine-histiocytic-sarcoma-sequential-alternating-and-rescue-chemotherapy
#4
S L Mason, R Finotello, L Blackwood
The aims of this study were to report treatment outcomes for dogs with histiocytic sarcoma (HS) treated with both lomustine and epirubicin, and to report response rates to epirubicin as a rescue therapy in dogs previously treated with lomustine. Medical records of dogs with a diagnosis of HS that were treated with both lomustine and epirubicin were retrospectively evaluated. Of 29 dogs receiving epirubicin alternating with, or subsequent to lomustine treatment, including in a rescue setting, response to epirubicin could be assessed in 20 with an overall response rate (ORR) of 29% and biological response rate (BRR) of 71%...
June 15, 2017: Veterinary and Comparative Oncology
https://www.readbyqxmd.com/read/28608404/apoptotic-intrinsic-pathway-proteins-predict-survival-in-canine-cutaneous-mast-cell-tumours
#5
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/28589573/in-vitro-and-in-vivo-effect-of-flutamide-on-steroid-hormone-secretion-in-canine-and-human-inflammatory-breast-cancer-cell-lines
#6
S Caceres, B Monsalve, L Peña, P J de Andres, A Alonso-Diez, M J Illera, W A Woodward, J M Reuben, G Silvan, J C Illera
The aim was to study the effects of flutamide on cell proliferation, in vivo tumour growth and steroid production in canine and human IBC cell lines. IPC-366 and SUM149 cell cultures were exposed to flutamide concentrations for 72 hours. Additionally, IPC-366 and SUM149 xenotransplanted mice were treated subcutaneously with flutamide 3 times a week for 2 weeks. Steroid hormones determination in culture media, serum and tumour homogenates (pregnenolone, progesterone, androstenedione, testosterone, dihydrotestosterone, 17β-oestradiol and oestrone sulphate) were assayed by EIA...
June 6, 2017: Veterinary and Comparative Oncology
https://www.readbyqxmd.com/read/28560846/outcome-following-treatment-of-feline-gastrointestinal-mast-cell-tumours
#7
L E Barrett, K Skorupski, D C Brown, N Weinstein, C Clifford, A Szivek, S Haney, S Kraiza, E L Krick
Prognosis of feline gastrointestinal mast cell tumours (FGIMCT), based on limited available literature, is described as guarded to poor, which may influence treatment recommendations and patient outcome. The purpose of this study is to describe the clinical findings, treatment response, and outcome of FGIMCT. Medical records of 31 cats diagnosed with and treated for FGIMCT were retrospectively reviewed. Data collected included signalment, method of diagnosis, tumour location (including metastatic sites), treatment type, cause of death and survival time...
May 31, 2017: Veterinary and Comparative Oncology
https://www.readbyqxmd.com/read/28556532/feline-large-granular-lymphocyte-lymphoma-an-italian-society-of-veterinary-oncology-sioncov-retrospective-study
#8
R Finotello, M E Vasconi, S Sabattini, C Agnoli, C Giacoboni, M Annoni, A Dentini, G Bettini, P Guazzi, D Stefanello, E Bottero, P Mesto, R Marinelli, C De Feo, L Marconato
Feline large granular lymphocyte (LGL) lymphoma is an uncommon subtype of lymphoma characterized by a grave prognosis and scarce response to chemotherapy. There are limited reports on clinico-pathological and prognostic factors. One-hundred and 9 cats with newly diagnosed LGL lymphoma that underwent initial staging (including hematology, serum biochemistry, thoracic radiographs and abdominal ultrasound), and followed-up were retrospectively evaluated. LGL lymphoma was localized within the gastrointestinal tract with or without extra-intestinal involvement in 91...
May 29, 2017: Veterinary and Comparative Oncology
https://www.readbyqxmd.com/read/28544776/comparison-of-histologic-margin-status-in-low-grade-cutaneous-and-subcutaneous-canine-mast-cell-tumours-examined-by-radial-and-tangential-sections
#9
C B Dores, M Milovancev, D S Russell
BACKGROUND: Radial sections are widely used to estimate adequacy of excision in canine cutaneous mast cell tumours (MCTs); however, this sectioning technique estimates only a small fraction of total margin circumference. This study aimed to compare histologic margin status in grade II/low grade MCTs sectioned using both radial and tangential sectioning techniques. MATERIALS AND METHODS: A total of 43 circumferential margins were evaluated from 21 different tumours...
May 23, 2017: Veterinary and Comparative Oncology
https://www.readbyqxmd.com/read/28524622/prognostic-significance-of-morphotypes-in-canine-lymphomas-a-systematic-review-of-literature
#10
REVIEW
D Sayag, C Fournel-Fleury, F Ponce
Correlation between morphotypes and prognosis of canine lymphomas presented discordant results in literature, leading to some dilemma for application in clinical practice. The aim of this study was to present a systematic review of literature on the prognostic significance of morphotypes in canine lymphomas. Standardized Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) criteria were applied. Retrospective and prospective studies were included. Level of evidence was determined for each study...
May 19, 2017: Veterinary and Comparative Oncology
https://www.readbyqxmd.com/read/28524617/metastatic-diagnosis-of-canine-sternal-lymph-nodes-using-computed-tomography-characteristics-a-retrospective-cross-sectional-study
#11
R Iwasaki, M Murakami, M Kawabe, K Heishima, H Sakai, T Mori
The accurate evaluation of sternal lymph nodes (StLNs) is critical for the staging of canine thoraco-abdominal tumours. Computed tomography (CT) provides a non-invasive means of assessing StLNs, but its diagnostic accuracy for identifying metastases is unclear. In this retrospective cross-sectional study, we assessed the diagnostic power of various CT measurements. Fifty-seven dogs that underwent concurrent CT and cytological examination of the StLNs were enrolled retrospectively. The size, shape, X-ray attenuation and uniformity of the StLNs were assessed...
May 19, 2017: Veterinary and Comparative Oncology
https://www.readbyqxmd.com/read/28512868/metastasis-associated-microrna-expression-in-canine-uveal-melanoma
#12
M P Starkey, L Compston-Garnett, P Malho, K Dunn, R Dubielzig
BACKGROUND: Uveal melanoma (UM) is the most common primary intraocular tumour in dogs. There is no effective means of predicting whether a tumour will metastasize. microRNA (miRNA) metastasis signatures have been identified for several human cancers, including UM. AIMS: In this study we investigated whether metastasizing and non-metastasizing canine UMs can be distinguished by miRNA expression levels. MATERIALS AND METHODS: miRNA microarray profiling was used to compare miRNA expression in 8 metastasizing and 12 non-metastasizing formalin-fixed, paraffin-embedded (FFPE) primary UM biopsies...
May 17, 2017: Veterinary and Comparative Oncology
https://www.readbyqxmd.com/read/28508557/lopp-chemotherapy-as-a-first-line-treatment-for-dogs-with-t-cell-lymphoma
#13
P M Brown, S Tzannes, S Nguyen, J White, V Langova
BACKGROUND: The aim of this study was to describe the use of a lomustine (CCNU), vincristine, procarbazine and prednisolone (LOPP) protocol used for treatment of chemotherapy naive T-cell lymphoma patients and to describe the response rate, toxicity and disease-free interval compared historically to CHOP chemotherapy. MATERIALS AND METHODS: Retrospective case study of 31 dogs with naïve T-cell lymphoma treated with a lomustine (CCNU), vincristine, procarbazine and prednisolone (LOPP) protocol...
May 16, 2017: Veterinary and Comparative Oncology
https://www.readbyqxmd.com/read/28480610/intratumoral-injection-of-radioactive-holmium-166-ho-microspheres-for-treatment-of-oral-squamous-cell-carcinoma-in-cats
#14
S A van Nimwegen, R C Bakker, J Kirpensteijn, R J J van Es, R Koole, M G E H Lam, J W Hesselink, J F W Nijsen
BACKGROUND & AIMS: A "microbrachytherapy" was developed as treatment option for inoperable tumours by direct intratumoral injection of radioactive holmium-166 ( (166) Ho) microspheres (MS). (166) Ho emits β-radiation which potentially enables a high, ablative, radioactive-absorbed dose on the tumour tissue while sparing surrounding tissues. MATERIALS & METHODS: Safety and efficacy of (166) Ho microbrachytherapy were evaluated in a prospective cohort study of 13 cats with inoperable oral squamous cell carcinoma without evidence of distant metastasis...
May 8, 2017: Veterinary and Comparative Oncology
https://www.readbyqxmd.com/read/28480569/expression-and-targeting-of-transcription-factor-atf5-in-dog-gliomas
#15
D York, C D Sproul, N Chikere, P J Dickinson, J M Angelastro
BACKGROUND: Activating transcription factor 5 (ATF5) is a transcription factor that is highly expressed in undifferentiated neural progenitor/stem cells as well as a variety of human cancers including gliomas. AIMS: In this study, we examined the expression and localization of ATF5 protein in canine gliomas, and targeting of ATF5 function in canine glioma cell lines. MATERIALS AND METHODS: Paraffin-embedded canine brain glioma tissue sections and western blots of tumours and glioma cells were immunoassayed with anti-ATF5 antibody...
May 8, 2017: Veterinary and Comparative Oncology
https://www.readbyqxmd.com/read/28419683/geographical-differences-in-survival-of-dogs-with-non-hodgkin-lymphoma-treated-with-a-chop-based-chemotherapy-protocol
#16
H Wilson-Robles, C M Budke, T Miller, N Dervisis, A Novosad, Z Wright, D H Thamm, K Vickery, K Burgess, M Childress, J Lori, C Saba, S Rau, M Silver, G Post, K Reeds, S Gillings, S Schleis, T Stein, B Brugmann, C DeRegis, O Smrkovski, J Lawrence, T Laver
BACKGROUND: In humans geographical differences in the incidence and presentation of various cancers have been reported. However, much of this information has not been collected in veterinary oncology. AIM: The purpose of this study was to determine if a geographic difference in progression free survival exists for dogs with lymphoma treated within the US. MATERIALS AND METHODS: Medical records of 775 cases of canine lymphoma from 3 US regions (west, south and north), treated with CHOP chemotherapy, were retrospectively evaluated...
April 17, 2017: Veterinary and Comparative Oncology
https://www.readbyqxmd.com/read/28419676/efficacy-of-dacarbazine-as-a-rescue-agent-for-histiocytic-sarcoma-in-dogs
#17
K A Kezer, L G Barber, S H Jennings
BACKGROUND: Canine histiocytic sarcoma (HS) is an aggressive neoplasm that is generally associated with a poor prognosis. CCNU is considered first-line medical therapy, although the majority of dogs ultimately develop progressive disease. The objective of this study was to evaluate the efficacy of dacarbazine as a rescue agent for HS. MATERIALS AND METHODS: Medical records of dogs diagnosed with HS that received at least one dose of dacarbazine were reviewed. Information collected and analyzed included signalment, disease distribution, treatment history, dacarbazine treatments (including dose, interval and total number of cycles), adverse events, and response to treatment...
April 17, 2017: Veterinary and Comparative Oncology
https://www.readbyqxmd.com/read/28397975/the-jak2-stat5-signaling-pathway-as-a-potential-therapeutic-target-in-canine-mastocytoma
#18
Alexandra Keller, Bettina Wingelhofer, Barbara Peter, Karin Bauer, Daniela Berger, Susanne Gamperl, Martin Reifinger, Sabine Cerny-Reiterer, Richard Moriggl, Michael Willmann, Peter Valent, Emir Hadzijusufovic
BACKGROUND: Mastocytoma are frequently diagnosed cutaneous neoplasms in dogs. In non-resectable mastocytoma patients, novel targeted drugs are often applied. The transcription factor STAT5 has been implicated in the survival of human neoplastic mast cells (MC). Our study evaluated the JAK2/STAT5 pathway as a novel target in canine mastocytoma. MATERIALS AND METHODS: We employed inhibitors of JAK2 (R763, TG101348, AZD1480, ruxolitinib) and STAT5 (pimozide, piceatannol) and evaluated their effects on 2 mastocytoma cell lines, C2 and NI-1...
April 11, 2017: Veterinary and Comparative Oncology
https://www.readbyqxmd.com/read/27197945/the-flint-animal-cancer-center-facc-canine-tumour-cell-line-panel-a-resource-for-veterinary-drug-discovery-comparative-oncology-and-translational-medicine
#19
J S Fowles, D D Dailey, D L Gustafson, D H Thamm, D L Duval
Mammalian cell tissue culture has been a critical tool leading to our current understanding of cancer including many aspects of cellular transformation, growth and response to therapies. The current use of large panels of cell lines with associated phenotypic and genotypic information now allows for informatics approaches and in silico screens to rapidly test hypotheses based on simple as well as complex relationships. Current cell line panels with large amounts of associated drug sensitivity and genomics data are comprised of human cancer cell lines (i...
June 2017: Veterinary and Comparative Oncology
https://www.readbyqxmd.com/read/27174040/extravasation-reactions-associated-with-the-administration-of-pamidronate-11-cases-2008-2013
#20
B A Marker, L G Barber, C A Clifford, S S Correa, P L Thalhofer, T A LaDue, C M Mullin, M L Sauerbrey, C C Wood
Pamidronate is a bisphosphonate drug widely utilized in veterinary oncologic practice for the palliation of malignant osteolysis. Pamidronate has not been previously reported to cause tissue injury upon extravasation in dogs. The medical records of 11 client-owned dogs undergoing palliative treatment for primary bone tumors with known or suspected pamidronate extravasation reactions were reviewed. The majority of adverse events were low grade in nature, however in some cases, the reactions were severe and led to euthanasia in one instance...
June 2017: Veterinary and Comparative Oncology
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