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https://www.readbyqxmd.com/read/29235249/anticancer-effects-of-resveratrol-in-canine-hemangiosarcoma-cell-lines
#1
A Carlson, K S Alderete, M K O Grant, D M Seelig, L C Sharkey, B N M Zordoky
Hemangiosarcoma (HSA) is a highly malignant tumour with aggressive biological behaviour. HSAs are more common in dogs than other domestic animals. The median survival time of dogs with HSA remains short, even with chemotherapy and surgery. Therefore, there is a critical need to improve the adjuvant chemotherapeutic regimens to improve clinical outcomes in dogs with HSA. Resveratrol has been shown to possess strong anti-proliferative and/or pro-apoptotic properties in human cancer cell lines. Nevertheless, the potential anticancer effects of resveratrol have not been reported in canine HSAs...
December 13, 2017: Veterinary and Comparative Oncology
https://www.readbyqxmd.com/read/29226073/cloning-of-canine-ku80-and-its-localization-and-accumulation-at-dna-damage-sites
#2
Manabu Koike, Yasutomo Yutoku, Aki Koike
Molecularly targeted therapies have high specificity and significant cancer-killing effect. However, their antitumor effect might be greatly diminished by variation in even a single amino acid in the target site, as it occurs, for example, as a consequence of SNPs. Increasing evidence suggests that the DNA repair protein Ku80 is an attractive target molecule for the development of next-generation radiosensitizers for human cancers. However, the localization, post-translational modifications (PTMs), and complex formation of Ku80 have not been elucidated in canines...
December 2017: FEBS Open Bio
https://www.readbyqxmd.com/read/29215573/the-use-of-liposomes-and-nanoparticles-as-drug-delivery-systems-to-improve-cancer-treatment-in-dogs-and-cats
#3
REVIEW
Katarzyna Zabielska-Koczywąs, Roman Lechowski
BACKGROUND: Cancer remains a leading cause of death in companion animals. In human medicine, liposomes and nanoparticles have been extensively investigated as drug delivery systems (DDS) for anticancer agents due to their ability to target cancerous cells and reduce the negative side effects of free cytostatic drugs. In this review, the authors discuss the results of clinical trials using liposomes and polymer-based nanoparticles as DDS to improve cancer treatment in dogs and cats, indicating which ones seem worth further evaluation...
December 7, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29207991/investigation-of-c-kit-and-ki67-expression-in-normal-preneoplastic-and-neoplastic-canine-prostate
#4
Carlos Eduardo Fonseca-Alves, Priscilla Emiko Kobayashi, Chiara Palmieri, Renée Laufer-Amorim
BACKGROUND: c-KIT expression has been related to bone metastasis in human prostate cancer, but whether c-KIT expression can be similarly classified in canine prostatic tissue is unknown. This study assessed c-KIT and Ki67 expression in canine prostate cancer (PC). c-KIT gene and protein expression and Ki67 expression were evaluated in forty-four canine prostatic tissues by immunohistochemistry, RT-qPCR and western blot. Additionally, we have investigated c-KIT protein expression by immunoblotting in two primary canine prostate cancer cell lines...
December 6, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/29205620/interobserver-reliability-of-computed-tomographic-contouring-of-canine-tonsils-in-radation-therapy-treatment-planning
#5
Keiko Murakami, Nicholas J Rancilio, Jeannie Poulson Plantenga, George E Moore, Hock Gan Heng, Chee Kin Lim
In radiation therapy (RT) treatment planning for canine head and neck cancer, the tonsils may be included as part of the treated volume. Delineation of tonsils on computed tomography (CT) scans is difficult. Error or uncertainty in the volume and location of contoured structures may result in treatment failure. The purpose of this prospective, observer agreement study was to assess the interobserver agreement of tonsillar contouring by two groups of trained observers. Thirty dogs undergoing pre- and post-contrast CT studies of the head were included...
December 4, 2017: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/29203951/hypo-fractionated-radiation-magnetic-nanoparticle-hyperthermia-and-a-viral-immunotherapy-treatment-of-spontaneous-canine-cancer
#6
P Jack Hoopes, Karen L Moodie, Alicia A Petryk, James D Petryk, Shawntel Sechrist, David J Gladstone, Nicole F Steinmetz, Frank A Veliz, Alicea A Bursey, Robert J Wagner, Ashish Rajan, Danielle Dugat, Margaret Crary-Burney, Steven N Fiering
It has recently been shown that cancer treatments such as radiation and hyperthermia, which have conventionally been viewed to have modest immune based anti-cancer effects, may, if used appropriately stimulate a significant and potentially effective local and systemic anti-cancer immune effect (abscopal effect) and improved prognosis. Using eight spontaneous canine cancers (2 oral melanoma, 3 oral amelioblastomas and 1 carcinomas), we have shown that hypofractionated radiation (6 x 6 Gy) and/or magnetic nanoparticle hyperthermia (2 X 43°C / 45 minutes) and/or an immunogenic virus-like nanoparticle (VLP, 2 x 200 μg) are capable of delivering a highly effective cancer treatment that includes an immunogenic component...
January 2017: Proceedings of SPIE
https://www.readbyqxmd.com/read/29190690/development-of-effective-tumor-immunotherapy-using-a-novel-dendritic-cell-targeting-toll-like-receptor-ligand
#7
Nadeeka H De Silva, Takashi Akazawa, Viskam Wijewardana, Norimitsu Inoue, Maremichi Oyamada, Atsuko Ohta, Yuki Tachibana, Daluthgamage Patsy H Wijesekera, Mitsuru Kuwamura, Yasuko Nishizawa, Kazuyuki Itoh, Takeshi Izawa, Shingo Hatoya, Tetsuya Hasegawa, Jyoji Yamate, Toshio Inaba, Kikuya Sugiura
Although dendritic cell (DC)-based immunotherapy shows little toxicity, improvements should be necessary to obtain satisfactory clinical outcome. Using interferon-gamma injection along with DCs, we previously obtained significant clinical responses against small or early stage malignant tumors in dogs. However, improvement was necessary to be effective to largely developed or metastatic tumors. To obtain effective methods applicable to those tumors, we herein used a DC-targeting Toll-like receptor ligand, h11c, and examined the therapeutic effects in murine subcutaneous and visceral tumor models and also in the clinical treatment of canine cancers...
2017: PloS One
https://www.readbyqxmd.com/read/29190660/actionable-mutations-in-canine-hemangiosarcoma
#8
Guannan Wang, Ming Wu, Martha A Maloneyhuss, John Wojcik, Amy C Durham, Nicola J Mason, David B Roth
BACKGROUND: Angiosarcomas (AS) are rare in humans, but they are a deadly subtype of soft tissue sarcoma. Discovery sequencing in AS, especially the visceral form, is hampered by the rarity of cases. Most diagnostic material exists as archival formalin fixed, paraffin embedded tissue which serves as a poor source of high quality DNA for genome-wide sequencing. We approached this problem through comparative genomics. We hypothesized that exome sequencing a histologically similar tumor, hemangiosarcoma (HSA), that occurs in approximately 50,000 dogs per year, may lead to the identification of potential oncogenic drivers and druggable targets that could also occur in angiosarcoma...
2017: PloS One
https://www.readbyqxmd.com/read/29187441/flavopiridol-strongly-sensitizes-canine-lymphoma-cells-to-trail-induced-apoptosis
#9
Aleksandra Pawlak, Diego DE Miguel, Justyna Kutkowska, Bożena Obmińska-Mrukowicz, Andrzej Rapak, Luis Martinez Lostao
BACKGROUND/AIM: Targeting the extrinsic apoptotic pathway is an interesting option for anticancer therapy. A protein which such ability is Apo2 ligand, also known as TNF-related apoptosis-inducing ligand (TRAIL). The aim of this study was to examine the possibility of sensitizing resistant CLBL-1 canine lymphoma cells to TRAIL-induced apoptosis by using flavopiridol (FVP) a cyclin-dependent kinase inhibitor (CDKs). MATERIALS AND METHODS: The CLBL-1 (canine B-cell lymphoma cell line) was used in the study...
December 2017: Anticancer Research
https://www.readbyqxmd.com/read/29178579/vitamin-d-receptor-expression-in-canine-mammary-gland-and-relationship-with-clinicopathological-parameters-and-progesterone-oestrogen-receptors
#10
R Sánchez-Céspedes, M D Fernández-Martínez, A Raya, C Pineda, I López, Y Millán
The vitamin D receptor (VDR) belongs to the nuclear class II receptor family. VDR is a ligand transcription factor and mediates the actions of calcitriol, the active product of vitamin D synthesis. Nowadays, it is known that the biological actions of calcitriol include the capacity to modulate cancer features, such as proliferation and differentiation, apoptosis, angiogenesis, invasion and metastasis. VDR expression has been demonstrated in human breast cancer and vitamin D has emerged as a promising targeted therapy...
November 27, 2017: Veterinary and Comparative Oncology
https://www.readbyqxmd.com/read/29175872/notch-pathway-inhibition-targets-chemoresistant-insulinoma-cancer-stem-cells
#11
Ylenia Capodanno, Floryne O Buishand, Lisa Y Pang, Jolle Kirpensteijn, Jan A Mol, David J Argyle
Insulinomas (INS) are the most common neuroendocrine pancreatic tumours in humans and dogs. The long-term prognosis for malignant INS is still poor due to a low success rate of the current treatment modalities, particularly chemotherapy. A better understanding of the molecular processes underlying the development and progression of INS is required to develop novel targeted therapies. Cancer stem cells (CSCs) are thought to be critical for the engraftment and chemoresistance of many tumours, including INS. This study was aimed to characterise and target INS CSCs in order to develop novel targeted therapies...
November 24, 2017: Endocrine-related Cancer
https://www.readbyqxmd.com/read/29172705/expression-of-iron-related-proteins-in-feline-and-canine-mammary-gland-reveals-unexpected-accumulation-of-iron
#12
O Marques, A Canadas, F Faria, E Oliveira, I Amorim, F Seixas, A Gama, A Lobo-da-Cunha, B Martins da Silva, G Porto, C Lopes
Dysregulation of cellular iron homeostasis in human breast cancer is reflected by the altered expression of regulatory proteins. The expressions of iron-related proteins in the mammary glands of cats and dogs have not been assessed. We evaluated the expressions of ferritin, ferroportin, hepcidin and transferrin receptor 1 in benign and malignant mammary gland lesions in cats and dogs. Iron deposition was detected using Perls' Prussian blue staining. We found no major differences in the expression of iron-related proteins between benign and malignant mammary gland lesions in either cats or dogs; however, these species exhibited accumulation of iron in benign lesions...
November 27, 2017: Biotechnic & Histochemistry: Official Publication of the Biological Stain Commission
https://www.readbyqxmd.com/read/29161183/epitope-mapping-of-monoclonal-antibody-pmab-38-against-dog-podoplanin
#13
Yao-Wen Chang, Shinji Yamada, Mika K Kaneko, Yukinari Kato
Podoplanin (PDPN), a type I transmembrane sialoglycoprotein, is extensively expressed by normal lymphatic endothelial cells, renal podocytes, and pulmonary type I alveolar cells. Nevertheless, increased expression of PDPN in malignant tumors not only associates with poor prognosis but also facilitates hematogenous metastasis through interaction with C-type lectin-like receptor-2 presented on platelets, followed by PDPN-mediated platelet activation. We previously reported a novel PMab-38 antibody, an anti-dog PDPN (dPDPN) monoclonal antibody, which specifically recognizes PDPN in squamous cell carcinomas melanomas and cancer-associated fibroblasts in canine cancer tissues...
November 21, 2017: Monoclonal Antibodies in Immunodiagnosis and Immunotherapy
https://www.readbyqxmd.com/read/29158470/comparative-oncology-evaluation-of-intravenous-recombinant-oncolytic-vesicular-stomatitis-virus-therapy-in-spontaneous-canine-cancer
#14
Shruthi Naik, Gina D Galyon, Nathan J Jenks, Michael B Steele, Amber C Miller, Sara D Allstadt, Lukkana Suksanpaisan, Kah Whye Peng, Mark J Federspiel, Stephen J Russell, Amy K LeBlanc
Clinical translation of intravenous therapies to treat disseminated or metastatic cancer is imperative. Comparative oncology, the evaluation of novel cancer therapies in animals with spontaneous cancer, can be utilized to inform and accelerate clinical translation. Preclinical murine studies demonstrate that single shot systemic therapy with a VSV-IFNβ-NIS, a novel recombinant oncolytic Vesicular stomatitis virus (VSV), can induce curative remission in tumor bearing mice. Clinical translation of VSV-IFNβ-NIS therapy is dependent on comprehensive assessment of clinical toxicities, virus shedding, pharmacokinetics, and efficacy in clinically relevant models...
November 20, 2017: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/29155017/p-glycoprotein-mdr1-abcb1-and-breast-cancer-resistance-protein-bcrp-abcg2-affect-brain-accumulation-and-intestinal-disposition-of-encorafenib-in-mice
#15
Jing Wang, Changpei Gan, Rolf W Sparidans, Els Wagenaar, Stéphanie van Hoppe, Jos H Beijnen, Alfred H Schinkel
Encorafenib (LGX818) is a promising BRAF(V600E) inhibitor that has efficacy against metastatic melanoma. To better understand its pharmacokinetics, we studied its interactions with the multidrug efflux transporters ABCB1 and ABCG2 and the multidrug metabolizing enzyme CYP3A. In polarized MDCK-II cells, encorafenib was efficiently transported by canine and human ABCB1 and ABCG2 and by mouse Abcg2. Upon oral administration to wild-type, Abcb1a/1b(-/-), Abcg2(-/-), and Abcb1a/1b;Abcg2(-/-) mice, encorafenib was absorbed very quickly and to very high plasma levels, but without clear changes in oral availability between the strains...
November 14, 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/29152844/faecal-microbiota-in-dogs-with-multicentric-lymphoma
#16
A Gavazza, G Rossi, G Lubas, M Cerquetella, Y Minamoto, J S Suchodolski
Malignant lymphoma B-cell type is the most common canine haematopoietic malignancy. Changes in intestinal microbiota have been implicated in few types of cancer in humans. The aim of this prospective and case-control study was to determine differences in faecal microbiota between healthy control dogs and dogs with multicentric lymphoma. Twelve dogs affected by multicentric, B-cell, stage III-IV lymphoma, and 21 healthy dogs were enrolled in the study. For each dog, faecal samples were analysed by Illumina sequencing of 16S rRNA genes and quantitative PCR (qPCR) for selected bacterial groups...
November 20, 2017: Veterinary and Comparative Oncology
https://www.readbyqxmd.com/read/29137329/development-of-a-radiolabeled-caninized-anti-egfr-antibody-for-comparative-oncology-trials
#17
Judit Fazekas-Singer, Neydher Berroterán-Infante, Christina Rami-Mark, Monika Dumanic, Miroslawa Matz, Michael Willmann, Fritz Andreae, Josef Singer, Wolfgang Wadsak, Markus Mitterhauser, Erika Jensen-Jarolim
Due to large homology of human and canine EGFR, dogs suffering from spontaneous EGFR+ cancer can be considered as ideal translational models. Thereby, novel immunotherapeutic compounds can be developed for both human and veterinary patients. This study describes the radiolabeling of a canine anti-EGFR IgG antibody (can225IgG) with potential diagnostic and therapeutic value in comparative clinical settings. Can225IgG was functionalized with DTPA for subsequent chelation with the radionuclide (99m)Tc. Successful coupling of 10 DTPA molecules per antibody on average was proven by significant mass increase in MALDI-TOF spectroscopy, gel electrophoresis and immunoblots...
October 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29115935/microrna-expression-patterns-in-canine-mammary-cancer-show-significant-differences-between-metastatic-and-non-metastatic-tumours
#18
Malgorzata Bulkowska, Agata Rybicka, Kerem Mert Senses, Katarzyna Ulewicz, Katarzyna Witt, Joanna Szymanska, Bartlomiej Taciak, Robert Klopfleisch, Eva Hellmén, Izabella Dolka, Ali O Gure, Joanna Mucha, Mariusz Mikow, Slawomir Gizinski, Magdalena Krol
BACKGROUND: MicroRNAs may act as oncogenes or tumour suppressor genes, which make these small molecules potential diagnostic/prognostic factors and targets for anticancer therapies. Several common oncogenic microRNAs have been found for canine mammary cancer and human breast cancer. On account of this, large-scale profiling of microRNA expression in canine mammary cancer seems to be important for both dogs and humans. METHODS: Expression profiles of 317 microRNAs in 146 canine mammary tumours of different histological type, malignancy grade and clinical history (presence/absence of metastases) and in 25 control samples were evaluated...
November 7, 2017: BMC Cancer
https://www.readbyqxmd.com/read/29113646/effects-of-recombinant-canine-interferon-%C3%AE-injected-before-general-anesthesia-with-propofol-and-isoflurane-on-natural-killer-cytotoxic-activity-during-anesthesia-in-dogs
#19
Hirotaka Matsumoto, Takuma Miyata, Tomoko Ohkusa, Takahiro Teshima, Hidekazu Koyama
We aimed to determine whether subcutaneous injection of recombinant canine interferon-γ (rCaIFN-γ) 1h before general anesthesia with a combination of propofol and isoflurane (P-I) changes the cytotoxic activity of natural killer (NK) cells during anesthesia in dogs. Nine clinically healthy beagles were assigned to one of two groups: rCaIFN-γ-treated group (n=5) and control group (no treatment, n=4). One hour before P-I anesthesia, rCaIFN-γ was subcutaneously injected at a dose of 1×10(4)U/kg body weight for the test group and physiologic saline was subcutaneously injected for the control group...
October 26, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/29113289/synergistic-and-targeted-therapy-with-a-procaspase-3-activator-and-temozolomide-extends-survival-in-glioma-rodent-models-and-is-feasible-for-the-treatment-of-canine-malignant-glioma-patients
#20
Avadhut D Joshi, Rachel C Botham, Lisa J Schlein, Howard S Roth, Antonella Mangraviti, Alexandra Borodovsky, Betty Tyler, Steve Joslyn, Jayme S Looper, Michael Podell, Timothy M Fan, Paul J Hergenrother, Gregory J Riggins
Purpose: Glioblastoma is a deadly brain cancer with a median survival time of ∼15 months. Ionizing radiation plus the DNA alkylator temozolomide (TMZ) is the current standard therapy. PAC-1, a procaspase-3 activating small molecule, is blood-brain barrier penetrant and has previously demonstrated ability to synergize with diverse pro-apoptotic chemotherapeutics. We studied if PAC-1 could enhance the activity of TMZ, and whether addition of PAC-1 to standard treatment would be feasible in spontaneous canine malignant gliomas...
October 6, 2017: Oncotarget
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