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oral cell carcinoma dog

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https://www.readbyqxmd.com/read/27580113/phase-i-ii-clinical-trial-of-hyaluronan-cisplatin-nanoconjugate-in-dogs-with-naturally-occurring-malignant-tumors
#1
Shuang Cai, Ti Zhang, W C Forrest, Qiuhong Yang, Chad Groer, Eva Mohr, Daniel J Aires, Sandra M Axiak-Bechtel, Brian K Flesner, Carolyn J Henry, Kimberly A Selting, Deborah Tate, Jeffrey A Swarz, Jeffrey N Bryan, M Laird Forrest
OBJECTIVE To conduct a phase I-II clinical trial of hyaluronan-cisplatin nanoconjugate (HA-Pt) in dogs with naturally occurring malignant tumors. ANIMALS 18 healthy rats, 9 healthy mice, and 16 dogs with cancer. PROCEDURES HA-Pt was prepared and tested by inductively coupled plasma mass spectrometry; DNA-platinum adduct formation and antiproliferation effects of cisplatin and HA-Pt were compared in vitro. Effects of cisplatin (IV) and HA-Pt (SC) in rodents were tested by clinicopathologic assays. In the clinical trial, dogs with cancer received 1 to 4 injections of HA-Pt (10 to 30 mg/m(2), intratumoral or peritumoral, q 3 wk)...
September 2016: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/27276060/immunohistochemical-analysis-of-pd-l1-expression-in-canine-malignant-cancers-and-pd-1-expression-on-lymphocytes-in-canine-oral-melanoma
#2
Naoya Maekawa, Satoru Konnai, Tomohiro Okagawa, Asami Nishimori, Ryoyo Ikebuchi, Yusuke Izumi, Satoshi Takagi, Yumiko Kagawa, Chie Nakajima, Yasuhiko Suzuki, Yukinari Kato, Shiro Murata, Kazuhiko Ohashi
Spontaneous cancers are common diseases in dogs. Among these, some malignant cancers such as oral melanoma, osteosarcoma, hemangiosarcoma, and mast cell tumor are often recognized as clinical problems because, despite their high frequencies, current treatments for these cancers may not always achieve satisfying outcomes. The absence of effective systemic therapies against these cancers leads researchers to investigate novel therapeutic modalities, including immunotherapy. Programmed death 1 (PD-1) is a costimulatory receptor with immunosuppressive function...
2016: PloS One
https://www.readbyqxmd.com/read/27245341/co-lyophilized-aspirin-with-trehalose-causes-less-injury-to-human-gastric-cells-and-gastric-mucosa-of-rats
#3
Lee-Shuan Lin, Yuko Kayasuga-Kariya, Shugo Nakamura, Nobuyuki Shimohata, Takamasa Sakai, Ayano Fujisawa, Yuki Akagi, Shigeki Suzuki, Ung-Il Chung, Nobuo Sasaki, Manabu Mochizuki
BACKGROUND: Aspirin is one of the most popular NSAIDs worldwide because of its anti-inflammatory and anticoagulant effects, and however, gastrointestinal injury remains a major complication. We previously reported co-lyophilized aspirin/trehalose (Lyo A/T) decreased the aspirin-induced gastric lesions in dogs. AIM: This study investigated the mechanism of gastroprotective effects of trehalose in vitro and in vivo. METHODS: The apoptotic assays were performed in a human gastric carcinoma cell line, which was treated with aspirin, mixed aspirin/trehalose (Mix A/T) or Lyo A/T...
August 2016: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/27147111/collision-tumour-of-squamous-cell-carcinoma-and-malignant-melanoma-in-the-oral-cavity-of-a-dog
#4
F Rodríguez, P Castro, G A Ramírez
A 7-year-old, male cocker spaniel was presented with a gingival proliferative lesion in the rostral maxilla and enlargement of the regional lymph node. Morphological and immunohistochemical analysis revealed a collision tumour composed of two malignant populations, epithelial and melanocytic, with metastasis of the neoplastic melanocytes to the regional lymph node. The epithelial component consisted of trabeculae and islands of well-differentiated squamous epithelium immunoreactive to cytokeratins. The melanocytic component had a varying degree of pigmentation of polygonal and spindle-shaped cells, growing in nests or densely packed aggregates and immunolabelled with S100, melanoma-associated antigen (melan A), neuron-specific enolase and vimentin antibodies...
May 2016: Journal of Comparative Pathology
https://www.readbyqxmd.com/read/26986192/atr-101-a-selective-and-potent-inhibitor-of-acyl-coa-acyltransferase-1-induces-apoptosis-in-h295r-adrenocortical-cells-and-in-the-adrenal-cortex-of-dogs
#5
Christopher R LaPensee, Jacqueline E Mann, William E Rainey, Valentina Crudo, Stephen W Hunt, Gary D Hammer
ATR-101 is a novel, oral drug candidate currently in development for the treatment of adrenocortical cancer. ATR-101 is a selective and potent inhibitor of acyl-coenzyme A:cholesterol O-acyltransferase 1 (ACAT1), an enzyme located in the endoplasmic reticulum (ER) membrane that catalyzes esterification of intracellular free cholesterol (FC). We aimed to identify mechanisms by which ATR-101 induces adrenocortical cell death. In H295R human adrenocortical carcinoma cells, ATR-101 decreases the formation of cholesteryl esters and increases FC levels, demonstrating potent inhibition of ACAT1 activity...
May 2016: Endocrinology
https://www.readbyqxmd.com/read/26711040/genomic-characterisation-of-canine-papillomavirus-type-17-a-possible-rare-cause-of-canine-oral-squamous-cell-carcinoma
#6
John S Munday, Magda Dunowska, Rebecca E Laurie, Simon Hills
Squamous cell carcinomas (SCCs) are the second most common cancer of the canine oral cavity resulting in significant morbidity and mortality. Recently a dog with multiple oral SCCs that contained a novel papillomavirus (PV) was reported. The aim of the present study was to determine the genome of this novel PV. To do this a short section of PV DNA was amplified from an oral SCC and 'back-to-back' primers were designed. Due to the circular nature of PV DNA, these primers were then used to amplify the remainder of the genome by inverse PCR...
2016: Veterinary Microbiology
https://www.readbyqxmd.com/read/25956344/molecular-and-immunohistochemical-studies-do-not-support-a-role-for-papillomaviruses-in-canine-oral-squamous-cell-carcinoma-development
#7
John S Munday, Adrienne French, Catherine J Harvey
Oral squamous cell carcinomas (OSCCs) are common neoplasms of dogs and are of unknown cause. Whereas papillomaviruses (PVs) are an established cause of human OSCCs, few studies have investigated canine OSCCs for a PV aetiology. In humans, a PV aetiology can be determined by detecting PV DNA and PV-induced increased p16(CDKN2A) protein (p16) within the OSCC. In this study, PCR, using four different primer sets and p16 immunohistochemistry, was used to evaluate 28 canine OSCCs for a possible PV aetiology. None of the primers amplified PV DNA from any of the OSCCs although four neoplasms contained intense p16 immunostaining...
May 2015: Veterinary Journal
https://www.readbyqxmd.com/read/25613043/multiple-oral-carcinomas-associated-with-a-novel-papillomavirus-in-a-dog
#8
John S Munday, Russell S Tucker, Matti Kiupel, Catherine J Harvey
Papillomaviruses (PVs) are well recognized to cause human oral squamous cell carcinomas (SCCs). However, there is currently little evidence that PVs similarly cause oral cancer in dogs. In the present case, a dog developed an invasive SCC and multiple in situ carcinomas within the mouth. Cell changes consistent with PV infection were prominent within the neoplasms and the surrounding gingiva. Immunohistochemical staining revealed PV antigens and intense p16(CDKN2A) protein (p16) immunostaining within the invasive SCC...
March 2015: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/25524719/pcna-and-grade-in-13-canine-oral-squamous-cell-carcinomas-association-with-prognosis
#9
L A Mestrinho, P Faísca, M C Peleteiro, M M R E Niza
This study evaluated the prognosis factors of age, tumour size, anatomic location, histological grade and proliferating cell nuclear antigen (PCNA) expression in 13 dogs with oral squamous cell carcinoma (OSCC) with bone invasion and without signs of lymph node or distant metastasis. All animals were treated with radical excision performed with at least 1 cm margin, based on computed tomography images. In the 2-year follow-up, median disease-free survival was 138 days for dogs with grade 3 tumours and was not reached for those with grade 2 tumours...
December 18, 2014: Veterinary and Comparative Oncology
https://www.readbyqxmd.com/read/25488594/characterization-of-the-transmembrane-transport-and-absolute-bioavailability-of-the-hcv-protease-inhibitor-danoprevir
#10
Barbara J Brennan, Agnès Poirier, Sebastian Moreira, Peter N Morcos, Petra Goelzer, Renée Portmann, Jiney Asthappan, Christoph Funk, Patrick F Smith
BACKGROUND AND OBJECTIVES: Understanding transmembrane transport provides a more complete understanding of the pharmacokinetics of a drug and mechanistic explanations for drug-drug interactions. Here, the transmembrane transport of danoprevir (hepatitis C virus protease inhibitor) and the effects of ritonavir and ciclosporin on transmembrane transport of danoprevir were evaluated and clinical pharmacokinetic studies of danoprevir co-administered with/without ritonavir and ciclosporin were conducted...
May 2015: Clinical Pharmacokinetics
https://www.readbyqxmd.com/read/25418424/-prognosis-of-canine-oral-gingival-squamous-cell-carcinoma-after-surgical-therapy-a-retrospective-analysis-in-40-patients
#11
S Kühnel, M Kessler
OBJECTIVE: Retrospective analysis of dogs with gingival squamous cell carcinoma (SCC) surgically treated using jaw resection. Material and me- thods: A total of 40 dogs were enrolled in the study. Dogs with incomplete tumour resection or metastases were subjected to adjuvant chemotherapy using carboplatin. Breed, age, tumour localisation, postsurgical complications, survival times and prognostic factors were evaluated. RESULTS: There were no breed predispositions...
2014: Tierärztliche Praxis. Ausgabe K, Kleintiere/Heimtiere
https://www.readbyqxmd.com/read/25401953/a-retrospective-investigation-on-canine-papillomavirus-1-cpv1-in-oral-oncogenesis-reveals-dogs-are-not-a-suitable-animal-model-for-high-risk-hpv-induced-oral-cancer
#12
Ilaria Porcellato, Chiara Brachelente, Gabriella Guelfi, Alice Reginato, Monica Sforna, Laura Bongiovanni, Luca Mechelli
CPV1 (also called COPV) is a papillomavirus responsible for oral papillomatosis in young dogs. The involvement of this viral type in oral oncogenesis has been hypothesized in oral squamous cell carcinomas (SCCs), but has never been investigated in other neoplastic and hyperplastic oral lesions of dogs. Aim of this study was to investigate the presence of CPV1 in different neoplastic and hyperplastic lesions in order to assess its role in canine oral oncogenesis; according to the results obtained, a second aim of the study was to define if the dog can be considered a valid animal model for oral high risk HPV-induced tumors...
2014: PloS One
https://www.readbyqxmd.com/read/25248518/p63-and-e-cadherin-expression-in-canine-oral-squamous-cell-carcinoma
#13
L A Mestrinho, H Pissarra, P B Faísca, M Bragança, M C Peleteiro, M M R E Niza
The expression of p63 and E-cadherin was studied in 22 oral squamous cell carcinomas in the dog according to immunohistochemical techniques. The association between these markers and clinicopathologic parameters was assessed. All tumor cells studied showed enhanced p63 expression. Regarding E-cadherin expression, 17 of 22 cases (77.3%) showed decreased immunoreactivity, and in 13 of 22 cases (59.1%), its expression was cytoplasmic. Neither p63 nor E-cadherin expression patterns were associated with tumor size, bone invasion, or lymph node metastasis...
July 2015: Veterinary Pathology
https://www.readbyqxmd.com/read/25245141/hmga1-and-hmga2-expression-and-comparative-analyses-of-hmga2-lin28-and-let-7-mirnas-in-oral-squamous-cell-carcinoma
#14
COMPARATIVE STUDY
Katharina Anna Sterenczak, Andre Eckardt, Andreas Kampmann, Saskia Willenbrock, Nina Eberle, Florian Länger, Sven Kleinschmidt, Marion Hewicker-Trautwein, Hans Kreipe, Ingo Nolte, Hugo Murua Escobar, Nils Claudius Gellrich
BACKGROUND: Humans and dogs are affected by squamous cell carcinomas of the oral cavity (OSCC) in a considerably high frequency. The high mobility group A2 (HMGA2) protein was found to be highly expressed in human OSCC and its expression was suggested to act as a useful predictive and prognostic tool in clinical management of oral carcinomas. Herein the expression of HMGA2 and its sister gene HMGA1 were analysed within human and canine OSCC samples. Additionally, the HMGA negatively regulating miRNAs of the let-7 family as well as the let-7 regulating gene Lin28 were also comparatively analysed...
2014: BMC Cancer
https://www.readbyqxmd.com/read/24903027/determination-of-oral-bioavailability-of-fusaric-acid-in-male-sprague-dawley-rats
#15
Brendan C Stack, John Ye, Rebecca Willis, Martha Hubbard, Howard P Hendrickson
Head and neck squamous cell cancer accounts for 3 % of new cancer cases and 2 % of cancer mortality annually in the United States. Current treatment options for most head and neck cancers continue to be surgical excision with or without radiation, radiation alone, or chemotherapy with radiation depending on location, stage of disease, and patient preference. Fusaric acid (FA) is a novel compound from a novel class of nicotinic acid derivatives that have activity against head and neck squamous cell carcinoma (HNSCC)...
June 2014: Drugs in R&D
https://www.readbyqxmd.com/read/24798372/a-survey-of-veterinary-radiation-facilities-in-2010
#16
John Farrelly, Margaret C McEntee
A survey of veterinary radiation therapy facilities in the United States, Canada, and Europe was done in 2010, using an online survey tool, to determine the type of equipment available, radiation protocols used, caseload, tumor types irradiated, as well as other details of the practice of veterinary radiation oncology. The results of this survey were compared to a similar survey performed in 2001. A total of 76 facilities were identified including 24 (32%) academic institutions and 52 (68%) private practice external beam radiation therapy facilities...
November 2014: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/24659713/elevated-vascular-endothelial-growth-factor-vegf-levels-in-the-blood-serum-of-dogs-with-malignant-neoplasms-of-the-oral-cavity
#17
Aleksandra Sobczyńska-Rak, Izabela Polkowska, Piotr Silmanowicz
Angiogenesis plays an essential role in the development of a neoplastic tumour by conditioning both its growth and the formation of metastases. The induction of blood vessel growth occurs under the influence of proangiogenic factors, among which Vascular Endothelial Growth Factor (VEGF) seems to be the most important. The aim of this research was to study the level of VEGF measured by ELISA in the serum of dogs with neoplasms of the oral cavity. The study material comprised samples of neoplastic tissue from 17 operated dogs and the serum of the examined animals as well as of dogs from the control group...
September 2014: Acta Veterinaria Hungarica
https://www.readbyqxmd.com/read/24631063/piroxicam-inhibits-masitinib-induced-cyclooxygenase-2-expression-in-oral-squamous-cell-carcinoma-cells-in%C3%A2-vitro
#18
Kusum Rathore, Mary Alexander, Maria Cekanova
Development and characterization of animal models for human cancers is important for the improvement of diagnosis and therapy. The oral squamous cell carcinoma (OSCC) of domestic animals resembles human OSCC in many aspects; thus, cell lines derived from OSCC of cats and dogs are a valuable model for human OSCC. We characterized 1 feline OSCC (FeOSCC-Sidney) and 1 canine OSCC (K9OSCC-Abby) cell line and compared their characteristics with human OSCC cell line hSCC-25. We calculated the doubling time of the new OSCC cell lines and evaluated the expression profiles of cancer-related markers and cell-cycle proteins such as c-kit, platelet-derived growth factor receptor, vascular endothelial growth factor receptor, epidermal growth factor receptor, cyclooxygenase (COX)-1, COX-2, and p27 by immunocytochemistry and Western blot analysis...
August 2014: Translational Research: the Journal of Laboratory and Clinical Medicine
https://www.readbyqxmd.com/read/24474422/carcinogenicity-risk-assessment-supports-the-chronic-safety-of-dapagliflozin-an-inhibitor-of-sodium-glucose-co-transporter-2-in-the-treatment-of-type-2-diabetes-mellitus
#19
Timothy P Reilly, Michael J Graziano, Evan B Janovitz, Thomas E Dorr, Craig Fairchild, Francis Lee, Jian Chen, Tai Wong, Jean M Whaley, Mark Tirmenstein
INTRODUCTION: Dapagliflozin is a selective inhibitor of the sodium-glucose co-transporter 2 (SGLT2) that increases urinary glucose excretion to reduce hyperglycemia in the treatment of type 2 diabetes mellitus. A robust carcinogenicity risk assessment was undertaken to assess the chronic safety of dapagliflozin and SGLT2 inhibition. METHODS: Genotoxicity potential of dapagliflozin and its metabolites was assessed in silico, in vitro, and in vivo. Dapagliflozin was administered daily by oral gavage to mice, rats, and dogs to evaluate carcinogenicity risks, including the potential for tumor promotion...
June 2014: Diabetes Therapy: Research, Treatment and Education of Diabetes and related Disorders
https://www.readbyqxmd.com/read/24389420/investigations-into-the-mechanisms-of-pyridine-ring-cleavage-in-vismodegib
#20
S Cyrus Khojasteh, Qin Yue, Shuguang Ma, Georgette Castanedo, Jacob Z Chen, Joseph Lyssikatos, Teresa Mulder, Ryan Takahashi, Justin Ly, Kirsten Messick, Wei Jia, Lichuan Liu, Cornelis E C A Hop, Harvey Wong
Vismodegib (Erivedge, GDC-0449) is a first-in-class, orally administered small-molecule Hedgehog pathway inhibitor that is approved for the treatment of advanced basal cell carcinoma. Previously, we reported results from preclinical and clinical radiolabeled mass balance studies in which we determined that metabolism is the main route of vismodegib elimination. The metabolites of vismodegib are primarily the result of oxidation followed by glucuronidation. The focus of the current work is to probe the mechanisms of formation of three pyridine ring-cleaved metabolites of vismodegib, mainly M9, M13, and M18, using in vitro, ex vivo liver perfusion and in vivo rat studies...
March 2014: Drug Metabolism and Disposition: the Biological Fate of Chemicals
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