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Meuten TK, Dean GA, Thamm DH. Review: The PI3K-AKT-mTOR signal transduction pathway in canine cancer. Vet Pathol 2024; 61:339-356. [PMID: 37905509 DOI: 10.1177/03009858231207021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2023]
Abstract
Tumors in dogs and humans share many similar molecular and genetic features, incentivizing a better understanding of canine neoplasms not only for the purpose of treating companion animals, but also to facilitate research of spontaneously developing tumors with similar biologic behavior and treatment approaches in an immunologically competent animal model. Multiple tumor types of both species have similar dysregulation of signal transduction through phosphatidylinositol 3-kinase (PI3K), protein kinase B (PKB; AKT), and mechanistic target of rapamycin (mTOR), collectively known as the PI3K-AKT-mTOR pathway. This review aims to delineate the pertinent aspects of the PI3K-AKT-mTOR signaling pathway in health and in tumor development. It will then present a synopsis of current understanding of PI3K-AKT-mTOR signaling in important canine cancers and advancements in targeted inhibitors of this pathway.
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Preliminary Assessment of Tumor-Associated Tissue Eosinophilia (TATE) in Canine Mast Cell Tumors: Prevalence and Prognostic Relevance and Its Association with Neoangiogenesis. Animals (Basel) 2023; 13:ani13020283. [PMID: 36670824 PMCID: PMC9855198 DOI: 10.3390/ani13020283] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 01/05/2023] [Accepted: 01/09/2023] [Indexed: 01/18/2023] Open
Abstract
Mast cell tumor (MCT) is the most common malignant skin tumor in dogs. In order to gain more information on the prognostic markers in MCT, the role of the eosinophil granulocytes infiltrates was investigated and assessed by the evaluation of tumor-associated tissue eosinophilia (TATE) in 87 canine cutaneous MCTs. In human medicine, high TATE are often described in highly angiogenic tumors: we therefore assessed the vascular endothelial growth factor (VEGF) expression in neoplastic mast cells. TATE and VEGF expression were compared between themselves, with histological grading, immunohistochemical expression of KIT and Ki-67, and with the recurrence. We found a statistically significant correlation between TATE and Patnaik grading (p = 0.041), Kiupel grading (p = 0.022), immunohistochemical KIT expression (p = 0.015), and tumor recurrence (p = 0.000). No associations were observed with Ki-67 and VEGF expression. This is the first evaluation of TATE and its prognostic value in canine MCTs in veterinary oncology. This study suggest that this investigation could be an important source of information for this tumor and for other neoplasms.
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Assessment of the possibility of using biomarkers (CCL11 and TGF-beta 1) in the diagnosis of prostate gland hyperplasia in dogs. Theriogenology 2022; 192:9-13. [PMID: 36030614 DOI: 10.1016/j.theriogenology.2022.08.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 08/05/2022] [Accepted: 08/05/2022] [Indexed: 11/20/2022]
Abstract
Prostatic hyperplasia (PH) is the most common reproductive disorder in dogs and can lead to discomforting problems such as haematuria, urinary incontinence, constipation, difficulty in defecating and stiffness of the hind limbs. The diagnosis of PH is nowadays based on digital rectal examination (DRE), ultrasonography (US) and radiography (X-ray). However, markers associated with PH are barely used for diagnostic purposes. Recently, there have been reports on the use of certain biomarkers for diagnosing PH in dogs such as canine PSA (Prostate Specific Antigen), microRNA and vascular endothelial growth factor (VEGF). Nevertheless, it has been generally accepted that these biomarkers play only an auxiliary role. Accordingly, the aim of our study was to evaluate the usefulness of the CCL11 (eotaxin-1) and TGF-beta 1 markers, which are used in the diagnosis of prostate diseases in humans, in case of dogs with PH. The study was carried out on 40 dogs of different breeds divided into three groups. Group I (n = 9) comprised dogs up to 5 years of age without changes indicative of PH. Group II (n = 17) included dogs aged 5-10 that were examined and diagnosed with (PH) and Group III (n = 14) which consisted of dogs over 10 years of age who were also diagnosed with PH. The study demonstrated that CCL11 levels did not differ significantly between the study groups and the median levels were 7.27 pg/mL, 7.57 pg/mL, 6.81 pg/mL, and IQR ranges 1.55 pg/mL, 1.74 pg/mL, 2.32 pg/mL, respectively. In contrast, TGF-beta 1 levels were detectable only in 6 dogs of group III and averaged the median of 28.86 pg/mL, IQR ranges 10.07 pg/mL. The study proved that CCL11 and TGF-beta 1 markers are of a limited use when diagnosing PH in dogs as no significant correlation related to age, body weight or prostate size was found.
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Mariani CL, Niman ZE, Boozer LB, Ruterbories LK, Early PJ, Muñana KR, Olby NJ. Vascular endothelial growth factor concentrations in the cerebrospinal fluid of dogs with neoplastic or inflammatory central nervous system disorders. J Vet Intern Med 2021; 35:1873-1883. [PMID: 34105831 PMCID: PMC8295675 DOI: 10.1111/jvim.16181] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Revised: 05/06/2021] [Accepted: 05/18/2021] [Indexed: 02/06/2023] Open
Abstract
Background Vascular endothelial growth factor (VEGF) is a key molecular driver of angiogenesis and vascular permeability and is expressed by a wide variety of neoplasms. Although blood VEGF concentrations have been quantified in intracranial tumors of dogs, cerebrospinal fluid (CSF) VEGF concentration might be a more sensitive biomarker of disease. Objective Concentrations of VEGF in CSF are higher in dogs with central nervous system (CNS) neoplasia compared to those with meningoencephalomyelitis and other neurologic disorders. Animals One hundred and twenty‐six client‐owned dogs presented to a veterinary teaching hospital. Methods Case‐control study. Cerebrospinal fluid was archived from dogs diagnosed with CNS neoplasia and meningoencephalomyelitis. Control dogs had other neurological disorders or diseases outside of the CNS. A commercially available kit was used to determine VEGF concentrations. Results Detectable CSF VEGF concentrations were present in 49/63 (77.8%) neoplastic samples, 22/24 (91.7%) inflammatory samples, and 8/39 (20.5%) control samples. The VEGF concentrations were significantly different between groups (P < .0001), and multiple comparison testing showed that both neoplastic and inflammatory groups had significantly higher concentrations than did controls (P < .05), but did not differ from each other. Gliomas and choroid plexus tumors had significantly higher VEGF concentrations than did the control group (P < .05). Conclusions and Clinical Importance Cerebrospinal fluid VEGF concentrations may serve as a marker of neoplastic and inflammatory CNS disorders relative to other conditions.
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Affiliation(s)
- Christopher L Mariani
- Comparative Neuroimmunology and Neuro-oncology Laboratory, North Carolina State University, Raleigh, North Carolina, USA.,Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, USA.,Comparative Medicine Institute, North Carolina State University, Raleigh, North Carolina, USA
| | - Zachary E Niman
- Comparative Neuroimmunology and Neuro-oncology Laboratory, North Carolina State University, Raleigh, North Carolina, USA.,Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, USA
| | - Lindsay B Boozer
- Comparative Neuroimmunology and Neuro-oncology Laboratory, North Carolina State University, Raleigh, North Carolina, USA
| | - Laura K Ruterbories
- Comparative Neuroimmunology and Neuro-oncology Laboratory, North Carolina State University, Raleigh, North Carolina, USA.,Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, USA
| | - Peter J Early
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, USA.,Comparative Medicine Institute, North Carolina State University, Raleigh, North Carolina, USA
| | - Karen R Muñana
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, USA.,Comparative Medicine Institute, North Carolina State University, Raleigh, North Carolina, USA
| | - Natasha J Olby
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, USA.,Comparative Medicine Institute, North Carolina State University, Raleigh, North Carolina, USA
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5
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MicroRNA and vascular endothelial growth factor (VEGF) as new useful markers in the diagnosis of benign prostatic hyperplasia in dogs. Theriogenology 2021; 171:113-118. [PMID: 34058504 DOI: 10.1016/j.theriogenology.2021.05.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 04/13/2021] [Accepted: 05/15/2021] [Indexed: 11/22/2022]
Abstract
Numerous specific biomarkers with a prognostic and diagnostic value comparable to histopathological findings are now used for non-invasive diagnosis of prostate diseases in humans. Meanwhile, as far as dogs are concerned, the diagnosis of prostate disorders is based solely on clinical examination and ultrasound (USG). Therefore, the aim of the study was to assess the usefulness of two biomarkers, i.e. miRNA-129 and VEGF for the diagnosis of BPH in dogs. The study involved 40 dogs divided into three groups. Group I (n = 9) comprised healthy dogs up to the age of 5 years, Group II (n = 17) comprised dogs between the ages of 5-10 suffering from BPH as confirmed by the examination and Group III (n = 14) comprising dogs over 10 years of age, which also had BPH confirmed. The results demonstrated that dogs in group II and III exhibited a significant decrease in miRNA expression (P < 0.0001) and a significant increase in serum VEGF levels (P = 0.025) when compared to the dogs in group I. There was also a positive correlation between the prostate size and VEGF level. The findings led to the conclusion that the determination of miRNA-129 and VEGF can significantly contribute to the diagnosis of prostate disorders in dogs.
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6
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Qin F, Fan Q, Yu PKN, Almahi WA, Kong P, Yang M, Cao W, Nie L, Chen G, Han W. Properties and gene expression profiling of acquired radioresistance in mouse breast cancer cells. ANNALS OF TRANSLATIONAL MEDICINE 2021; 9:628. [PMID: 33987326 PMCID: PMC8106033 DOI: 10.21037/atm-20-4667] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Background Acquired radioresistant cells exhibit many characteristic changes which may influence cancer progression and further treatment options. The purpose of this study is to investigate the changes of radioresistant human epidermal growth factor receptor 2 (HER2)-positive breast cancer cells on both phenotypic and molecular levels. Methods We established an acquired radioresistant cell line from its parental NF639 cell line (HER2-positive) by fractionated radiation and assessed changes in cellular morphology, proliferation, migration, anti-apoptosis activity, basal reactive oxygen species (ROS) level and energy metabolism. RNA-sequencing (RNA-seq) was also used to reveal the potential regulating genes and molecular mechanisms associated with the acquired changed phenotypes. Real-time PCR was used to validate the results of RNA-seq. Results The NF639R cells exhibited increased radioresistance and enhanced activity of proliferation, migration and anti-apoptosis, but decreased basal ROS. Two main energy metabolism pathways, mitochondrial respiration and glycolytic, were also upregulated. Furthermore, 490 differentially expressed genes were identified by RNA-seq. Enrichment analysis based on Gene Ontology and Kyoto Encyclopedia of Genes and Genomes showed many differently expressed genes were significantly enriched in cell morphology, proliferation, migration, anti-apoptosis, antioxidation, tumor stem cells and energy metabolism and the signaling cascades such as the transforming growth factor-β, Wnt, Hedgehog, vascular endothelial growth factor, retinoic acid-inducible gene I (RIG-I)-like receptor, Toll-like receptor and nucleotide oligomerization domain (NOD)-like receptor were significantly altered in NF639R cells. Conclusions In clinical radiotherapy, repeat radiotherapy for short-term recurrence of breast cancer may result in enhanced radioresistance and promote malignant progression. Our research provided hints to understand the tumor resistance to radiotherapy de novo and recurrence with a worse prognosis following radiotherapy.
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Affiliation(s)
- Feng Qin
- Anhui Province Key Laboratory of Medical Physics and Technology/Institute of Health and Medical Technology, Hefei Institutes of Physical Sciences, Chinese Academy of Sciences, Hefei, China.,Scinece Island Branch, Graduate School of USTC, Hefei, China.,Hefei Cancer Hospital, Chinese Academy of Sciences, Hefei, China.,Institute of Sericultural, Anhui Academy of Agricultural Sciences, Hefei, China
| | - Qiang Fan
- Anhui Province Key Laboratory of Medical Physics and Technology/Institute of Health and Medical Technology, Hefei Institutes of Physical Sciences, Chinese Academy of Sciences, Hefei, China.,Scinece Island Branch, Graduate School of USTC, Hefei, China
| | - Peter K N Yu
- Department of Physics, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong, China.,State Key Laboratory in Marine Pollution, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong, China
| | - Waleed Abdelbagi Almahi
- Anhui Province Key Laboratory of Medical Physics and Technology/Institute of Health and Medical Technology, Hefei Institutes of Physical Sciences, Chinese Academy of Sciences, Hefei, China.,Scinece Island Branch, Graduate School of USTC, Hefei, China
| | - Peizhong Kong
- Anhui Province Key Laboratory of Medical Physics and Technology/Institute of Health and Medical Technology, Hefei Institutes of Physical Sciences, Chinese Academy of Sciences, Hefei, China.,Scinece Island Branch, Graduate School of USTC, Hefei, China
| | - Miaomiao Yang
- Anhui Province Key Laboratory of Medical Physics and Technology/Institute of Health and Medical Technology, Hefei Institutes of Physical Sciences, Chinese Academy of Sciences, Hefei, China.,Scinece Island Branch, Graduate School of USTC, Hefei, China.,Clinical Pathology Center, The Fourth Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Wei Cao
- Anhui Province Key Laboratory of Medical Physics and Technology/Institute of Health and Medical Technology, Hefei Institutes of Physical Sciences, Chinese Academy of Sciences, Hefei, China.,Scinece Island Branch, Graduate School of USTC, Hefei, China
| | - Lili Nie
- Anhui Province Key Laboratory of Medical Physics and Technology/Institute of Health and Medical Technology, Hefei Institutes of Physical Sciences, Chinese Academy of Sciences, Hefei, China.,Hefei Cancer Hospital, Chinese Academy of Sciences, Hefei, China
| | - Guodong Chen
- Anhui Province Key Laboratory of Medical Physics and Technology/Institute of Health and Medical Technology, Hefei Institutes of Physical Sciences, Chinese Academy of Sciences, Hefei, China.,Hefei Cancer Hospital, Chinese Academy of Sciences, Hefei, China
| | - Wei Han
- Anhui Province Key Laboratory of Medical Physics and Technology/Institute of Health and Medical Technology, Hefei Institutes of Physical Sciences, Chinese Academy of Sciences, Hefei, China.,Hefei Cancer Hospital, Chinese Academy of Sciences, Hefei, China.,Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions and School for Radiological and Interdisciplinary Sciences (RAD-X), Soochow University, Suzhou, China
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7
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Nagata K. A retrospective analysis of radiation oncology related scientific articles in the journal Veterinary Radiology and Ultrasound: Trends over 40 years (1976-2015). Vet Radiol Ultrasound 2019; 60:351-357. [PMID: 30776858 DOI: 10.1111/vru.12716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 11/19/2018] [Accepted: 11/26/2018] [Indexed: 11/29/2022] Open
Abstract
The journal Veterinary Radiology & Ultrasound is a veterinary specialty journal devoted to the fields of veterinary diagnostic imaging and radiation oncology. The purpose of this retrospective, observational study is to evaluate progressive trends in radiation oncology articles published in Veterinary Radiology & Ultrasound during the 40-year period (1976-2015) and describe a shift of trends through several viewpoints. This 40-year period was divided into four subperiods: Period 1 (1976-1985), Period 2 (1986-1995), Period 3 (1996-2005), and Period 4 (2006-2015). These articles were divided into six categories based on the nature of the study: 1) studies related to teletherapy with endpoints being patient outcome, 2) radiation therapy dosimetry/planning, 3) patient setup, 4) reviews, 5) case reports, and 6) others. The number of radiation oncology articles in Veterinary Radiology & Ultrasound has increased over the 40-year period. The number of authors per article has increased between Periods 1 and 3. The number of articles related to linear accelerator has increased between Periods 3 and 4. The median number of treated patients per clinical article related to teletherapy ranged from 15 to 21, which has not changed significantly over the 40-year period. The most commonly used radiation therapy protocols during Periods 2 and 3 were fine-fractionated protocols (defined as 10 or more fractions), whereas coarse-fractionated protocols were more common during Periods 1 and 4. Findings from this study highlight the notable changes of trends in veterinary radiation oncology articles published in Veterinary Radiology & Ultrasound, which clearly reflect changes in the field of veterinary radiation oncology during the past 40 years.
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Affiliation(s)
- Koichi Nagata
- College of Veterinary Medicine, Department of Veterinary Biosciences & Diagnostic Imaging, The University of Georgia, Athens, GA 30602
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8
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Kleibeuker EA, Fokas E, Allen PD, Kersemans V, Griffioen AW, Beech J, Im JH, Smart SC, Castricum KC, van den Berg J, Schulkens IA, Hill SA, Harris AL, Slotman BJ, Verheul HM, Muschel RJ, Thijssen VL. Low dose angiostatic treatment counteracts radiotherapy-induced tumor perfusion and enhances the anti-tumor effect. Oncotarget 2016; 7:76613-76627. [PMID: 27780936 PMCID: PMC5363534 DOI: 10.18632/oncotarget.12814] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Accepted: 10/13/2016] [Indexed: 12/15/2022] Open
Abstract
The extent of tumor oxygenation is an important factor contributing to the efficacy of radiation therapy (RTx). Interestingly, several preclinical studies have shown benefit of combining RTx with drugs that inhibit tumor blood vessel growth, i.e. angiostatic therapy. Recent findings show that proper scheduling of both treatment modalities allows dose reduction of angiostatic drugs without affecting therapeutic efficacy. We found that whilst low dose sunitinib (20 mg/kg/day) did not affect the growth of xenograft HT29 colon carcinoma tumors in nude mice, the combination with either single dose RTx (1x 5Gy) or fractionated RTx (5x 2Gy/week, up to 3 weeks) substantially hampered tumor growth compared to either RTx treatment alone. To better understand the interaction between RTx and low dose angiostatic therapy, we explored the effects of RTx on tumor angiogenesis and tissue perfusion. DCE-MRI analyses revealed that fractionated RTx resulted in enhanced perfusion after two weeks of treatment. This mainly occurred in the center of the tumor and was accompanied by increased tissue viability and decreased hypoxia. These effects were accompanied by increased expression of the pro-angiogenic growth factors VEGF and PlGF. DCE-MRI and contrast enhanced ultrasonography showed that the increase in perfusion and tissue viability was counteracted by low-dose sunitinib. Overall, these data give insight in the dynamics of tumor perfusion during conventional 2 Gy fractionated RTx and provide a rationale to combine low dose angiostatic drugs with RTx both in the palliative as well as in the curative setting.
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Affiliation(s)
- Esther A. Kleibeuker
- Department of Radiation Oncology, VU University Medical Centre, De Boelelaan, HV Amsterdam, The Netherlands
- Department of Medical Oncology, VU University Medical Centre, De Boelelaan, HV Amsterdam, The Netherlands
| | - Emmanouil Fokas
- Oxford Institute for Radiation Oncology and Biology, University of Oxford, Oxford, UK
| | - Philip D. Allen
- Oxford Institute for Radiation Oncology and Biology, University of Oxford, Oxford, UK
| | - Veerle Kersemans
- Oxford Institute for Radiation Oncology and Biology, University of Oxford, Oxford, UK
| | - Arjan W. Griffioen
- Department of Medical Oncology, VU University Medical Centre, De Boelelaan, HV Amsterdam, The Netherlands
| | - John Beech
- Oxford Institute for Radiation Oncology and Biology, University of Oxford, Oxford, UK
| | - Jaehong H. Im
- Oxford Institute for Radiation Oncology and Biology, University of Oxford, Oxford, UK
| | - Sean C. Smart
- Oxford Institute for Radiation Oncology and Biology, University of Oxford, Oxford, UK
| | - Kitty C. Castricum
- Department of Radiation Oncology, VU University Medical Centre, De Boelelaan, HV Amsterdam, The Netherlands
| | - Jaap van den Berg
- Department of Radiation Oncology, VU University Medical Centre, De Boelelaan, HV Amsterdam, The Netherlands
| | - Iris A. Schulkens
- Department of Radiation Oncology, VU University Medical Centre, De Boelelaan, HV Amsterdam, The Netherlands
| | - Sally A. Hill
- Oxford Institute for Radiation Oncology and Biology, University of Oxford, Oxford, UK
| | - Adrian L. Harris
- Department of Molecular Oncology, University of Oxford, Oxford, UK
| | - Ben J. Slotman
- Department of Radiation Oncology, VU University Medical Centre, De Boelelaan, HV Amsterdam, The Netherlands
| | - Henk M. Verheul
- Department of Medical Oncology, VU University Medical Centre, De Boelelaan, HV Amsterdam, The Netherlands
| | - Ruth J. Muschel
- Oxford Institute for Radiation Oncology and Biology, University of Oxford, Oxford, UK
| | - Victor L. Thijssen
- Department of Radiation Oncology, VU University Medical Centre, De Boelelaan, HV Amsterdam, The Netherlands
- Department of Medical Oncology, VU University Medical Centre, De Boelelaan, HV Amsterdam, The Netherlands
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9
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Finotello R, Monné Rodriguez JM, Vilafranca M, Altimira J, Ramirez GA, Haines A, Ressel L. Immunohistochemical expression of MDR1-Pgp 170 in canine cutaneous and oral melanomas: pattern of expression and association with tumour location and phenotype. Vet Comp Oncol 2016; 15:1393-1402. [DOI: 10.1111/vco.12281] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Revised: 09/16/2016] [Accepted: 10/02/2016] [Indexed: 12/21/2022]
Affiliation(s)
- R. Finotello
- Small Animal Teaching Hospital, Institute of Veterinary Sciences; University of Liverpool; Neston UK
| | - J. M. Monné Rodriguez
- Section of Veterinary Pathology, Institute of Veterinary Sciences; University of Liverpool; Neston UK
| | - M. Vilafranca
- Laboratorio de Diagnóstico Histopatológico Histovet; Avda Països Catalans; Barcelona Spain
| | - J. Altimira
- Laboratorio de Diagnóstico Histopatológico Histovet; Avda Països Catalans; Barcelona Spain
| | - G. A. Ramirez
- Laboratorio de Diagnóstico Histopatológico Histovet; Avda Països Catalans; Barcelona Spain
| | - A. Haines
- Institute of Veterinary Sciences; University of Liverpool; Neston UK
| | - L. Ressel
- Section of Veterinary Pathology, Institute of Veterinary Sciences; University of Liverpool; Neston UK
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Flickinger I, Rütgen BC, Gerner W, Calice I, Tichy A, Saalmüller A, Kleiter M. Radiation up-regulates the expression of VEGF in a canine oral melanoma cell line. J Vet Sci 2013; 14:207-14. [PMID: 23814474 PMCID: PMC3694193 DOI: 10.4142/jvs.2013.14.2.207] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2012] [Revised: 05/09/2012] [Accepted: 08/30/2012] [Indexed: 11/20/2022] Open
Abstract
To evaluate radiosensitivity and the effects of radiation on the expression of vascular endothelial growth factor (VEGF) and VEGF receptors in the canine oral melanoma cell line, TLM 1, cells were irradiated with doses of 0, 2, 4, 6, 8 and 10 Gray (Gy). Survival rates were then determined by a MTT assay, while vascular endothelial growth factor receptor (VEGFR)-1 and -2 expression was measured by flow cytometry and apoptotic cell death rates were investigated using an Annexin assay. Additionally, a commercially available canine VEGF ELISA kit was used to measure VEGF. Radiosensitivity was detected in TLM 1 cells, and mitotic and apoptotic cell death was found to occur in a radiation dose dependent manner. VEGF was secreted constitutively and significant up-regulation was observed in the 8 and 10 Gy irradiated cells. In addition, a minor portion of TLM 1 cells expressed vascular endothelial growth factor receptor (VEGFR)-1 intracellularly. VEGFR-2 was detected in the cytoplasm and was down-regulated following radiation with increasing dosages. In TLM 1 cells, apoptosis plays an important role in radiation induced cell death. It has also been suggested that the significantly higher VEGF production in the 8 and 10 Gy group could lead to tumour resistance.
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Affiliation(s)
- Irene Flickinger
- Clinic for Internal Medicine and Infectious Diseases, Institute of Immunology, University of Veterinary Medicine, 1210 Vienna, Austria.
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11
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Graf C, Raila J, Schweigert FJ, Kohn B. Effect of leukoreduction treatment on vascular endothelial growth factor concentration in stored canine blood transfusion products. Am J Vet Res 2012; 73:2001-6. [DOI: 10.2460/ajvr.73.12.2001] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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12
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de Queiroz GF, Dagli MLZ, Meira SA, Matera JM. Serum vascular endothelial growth factor in dogs with soft tissue sarcomas. Vet Comp Oncol 2012; 11:230-5. [PMID: 22372675 DOI: 10.1111/j.1476-5829.2011.00316.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This work aimed to evaluate serum vascular endothelial growth factor (VEGF) in 25 dogs with soft tissue sarcoma, and in 30 healthy dogs. Blood was collected once time from the control animals and three times, in the same way, from animals with sarcoma. Blood count was performed in the blood collected, and serum VEGF was measured by enzyme-linked immunosorbent assay quantitative method. Serum VEGF in control animals was similar to patients with soft tissue sarcoma. There was a reduction in serum VEGF after the sarcoma resection. There was positive correlation between serum VEGF and neutrophil counts, and negative between VEGF and hemoglobin content in animals with sarcoma. Animals with hemangiopericytoma showed higher serum VEGF levels compared to the patients with malignant peripheral nerve sheath. Circulating blood cells can contribute to elevate VEGF serum concentrations in dogs with soft tissue sarcomas and a possible role of VEGF in the angiogenesis of these tumors.
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Affiliation(s)
- G Fernandes de Queiroz
- Department of Animal Sciences, Federal Rural University of the Semi-Arid, Mossoró, RN, Brazil
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13
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Abrams KL, Stabila PF, Kauper K, Elliott S. Vascular endothelial growth factor in diabetic and nondiabetic canine cataract patients. Vet Ophthalmol 2011; 14:93-9. [DOI: 10.1111/j.1463-5224.2010.00846.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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14
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Rossmeisl JH, Duncan RB, Huckle WR, Troy GC. Expression of vascular endothelial growth factor in tumors and plasma from dogs with primary intracranial neoplasms. Am J Vet Res 2008; 68:1239-45. [PMID: 17975980 DOI: 10.2460/ajvr.68.11.1239] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To quantitatively evaluate expression of vascular endothelial growth factor (VEGF) in intracranial tumors in dogs and determine whether relationships exist between circulating and intratumoral VEGF concentrations and tumor type and grade. ANIMALS 27 dogs with primary intracranial neoplasms and 4 unaffected control dogs. PROCEDURES Plasma and brain tumor samples were obtained from each dog, and plasma and intratumoral concentrations of VEGF were measured by use of an ELISA. RESULTS Dogs with meningiomas (n = 11) were significantly older than dogs with oligodendrogliomas (7) or astrocytomas (9). Measurable VEGF was detected in all tumors, and a significant negative correlation between age and intratumoral VEGF concentration was detected. Age-adjusted comparisons identified significant differences in intratumoral VEGF concentrations among all tumor types; the highest VEGF concentrations were associated with astrocytomas. Within each tumor type, increasing tumor grade was significantly associated with increasing VEGF expression. Plasma VEGF concentrations were detectable in 9 of 27 dogs; the proportion of dogs with astrocytomas and a detectable circulating VEGF concentration (7/9 dogs) was significantly higher than the proportion of dogs with meningiomas (1/11 dogs) or oligodendrogliomas (1/7 dogs) with a detectable circulating VEGF concentration. CONCLUSIONS AND CLINICAL RELEVANCE Overexpression of VEGF appears common in canine astrocytomas, oligodendrogliomas, and meningiomas. In the neoplasms examined, intratumoral VEGF concentrations correlated well with tumor malignancy. The VEGF expression patterns paralleled those of analogous human tumors, providing evidence that dogs are a suitable species in which to study angiogenesis and intracranial neoplasia for human application.
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Affiliation(s)
- John H Rossmeisl
- Department of Small Animal Clinical Sciences, Virginia-Maryland Regional College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
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Kato Y, Asano K, Mogi T, Kutara K, Teshima K, Edamura K, Tsumagari S, Hasegawa A, Tanaka S. Clinical Significance of Circulating Vascular Endothelial Growth Factor in Dogs with Mammary Gland Tumors. J Vet Med Sci 2007; 69:77-80. [PMID: 17283406 DOI: 10.1292/jvms.69.77] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Increase in circulating vascular endothelial growth factor (VEGF) is suggested as a prognostic indicator in human patients with malignant tumors. The purpose of this study was to evaluate the clinical significance of circulating VEGF in dogs with mammary gland tumors (MGT). Both plasma and serum VEGF were significantly higher in dogs with MGT when compared with those in the healthy dogs. In dogs with MGT, the plasma and serum VEGF of the malignant group increased significantly compared with those of the benign group. Additionally, there was a significant difference between the plasma and serum VEGF in the groups with postoperative metastasis and no metastasis. Circulating VEGF is expected to be clinically available for the determination of prognosis in canine MGT.
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Affiliation(s)
- Yuka Kato
- Laboratory of Veterinary Surgery, Department of Veterinary Medicine, College of Bioresource Sciences, Nihon University, Fujisawa, Kanagawa, Japan
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16
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Rebuzzi L, Willmann M, Sonneck K, Gleixner KV, Florian S, Kondo R, Mayerhofer M, Vales A, Gruze A, Pickl WF, Thalhammer JG, Valent P. Detection of vascular endothelial growth factor (VEGF) and VEGF receptors Flt-1 and KDR in canine mastocytoma cells. Vet Immunol Immunopathol 2006; 115:320-33. [PMID: 17196258 DOI: 10.1016/j.vetimm.2006.11.009] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2006] [Revised: 10/27/2006] [Accepted: 11/06/2006] [Indexed: 10/23/2022]
Abstract
Vascular endothelial growth factor (VEGF) is a major regulator of angiogenesis and a potential autocrine growth factor for neoplastic cells in various malignancies. In the present study, we have investigated expression of VEGF and VEGF receptors in canine mastocytomas and the canine mastocytoma cell line C2. As assessed by immunostaining of tissue sections and cytospin slides, primary neoplastic mast cells (MC) and C2 cells were found to express the VEGF protein. In Northern blot and RT-PCR experiments, C2 cells expressed VEGF mRNA in a constitutive manner. VEGF mRNA expression in C2 cells was counteracted by LY294002 and rapamycin, suggesting involvement of the PI3-kinase/mTOR pathway. Moreover, C2 cells were found to express VEGF receptor-1 (Flt-1) and VEGF receptor-2 (KDR). However, recombinant VEGF failed to promote (3)H-thymidine uptake in C2 cells, and a neutralizing anti-VEGF antibody (bevacizumab) failed to downregulate spontaneous proliferation in these cells. In addition, rapamycin decreased the expression of VEGF in C2 cells at the mRNA and protein level without suppressing their proliferation. Together, canine mastocytoma cells express VEGF as well as VEGF receptors. However, despite co-expression of VEGF and its receptors, VEGF is not utilized as an autocrine growth regulator by canine mastocytoma cells.
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Affiliation(s)
- Laura Rebuzzi
- Department for Small Animals and Horses, Clinic for Internal Medicine and Infectious Diseases, University of Veterinary Medicine Vienna, Vienna, Austria
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17
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Platt SR, Scase TJ, Adams V, Wieczorek L, Miller J, Adamo F, Long S. Vascular Endothelial Growth Factor Expression in Canine Intracranial Meningiomas and Association with Patient Survival. J Vet Intern Med 2006. [DOI: 10.1111/j.1939-1676.2006.tb02912.x] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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18
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Wergin MC, Roos M, Inteeworn N, Laluhovà D, Allemann K, Kaser-Hotz B. The influence of fractionated radiation therapy on plasma vascular endothelial growth factor (VEGF) concentration in dogs with spontaneous tumors and its impact on outcome. Radiother Oncol 2006; 79:239-44. [PMID: 16677728 DOI: 10.1016/j.radonc.2006.03.021] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2004] [Revised: 01/19/2006] [Accepted: 03/28/2006] [Indexed: 11/15/2022]
Abstract
BACKGROUND AND PURPOSE Vascular endothelial growth factor (VEGF), a specific pro-angiogenic factor is proposed to be involved in cancer progression and resistance to radiation therapy by promoting angiogenesis and by protecting endothelial cells from radiation induced apoptosis. The aim of this study, was first to assess the influence of ionizing radiation on plasma VEGF concentration in spontaneous canine tumors during fractionated radiation therapy with curative or palliative intent and second to analyze plasma VEGF concentration as predictor for treatment outcome. PATIENTS AND METHODS For plasma VEGF analysis a human VEGF enzyme linked immunosorbent assay was used. Sixty dogs with various tumor types were included in this study. Dogs were irradiated with either low dose per fx (3-3.5 Gy per fraction, total dose: 42-49 Gy, group A: curative intent) or high dose per fx (6-8 Gy per fraction, total dose: 24-30 Gy, group B: palliative intent). Blood samples were taken before and after dose application at certain time points during therapy. Follow-up evaluation was performed for analysis of time to treatment failure and survival. RESULTS Repeated measures analysis showed no increase of plasma VEGF in dogs treated with fractionated radiation therapy (group A and B). Dichotomizing baseline plasma VEGF into two groups with high and low plasma VEGF, resulted in shorter time to treatment failure in dogs with high plasma VEGF levels (TTF, group A: P=0.038, group B: P=0.041). CONCLUSIONS This study demonstrated that dogs with a plasma VEGF level higher than 5 pg/ml had a poorer outcome after radiation therapy. It is therefore, suggested, to use plasma VEGF as predictor for treatment outcome in radiation therapy.
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Affiliation(s)
- Melanie C Wergin
- Diagnostic Imaging and Radio-Oncology, Vetsuisse Faculty, University of Zurich, Switzerland.
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19
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Kato Y, Asano K, Mizutani I, Konno T, Sasaki Y, Kutara K, Teshima K, Edamura K, Kano R, Suzuki K, Shibuya H, Sato T, Hasegawa A, Tanaka S. Gene expressions of canine angiopoietin-1 and -2 in normal tissues and spontaneous tumours. Res Vet Sci 2006; 81:280-6. [PMID: 16545849 DOI: 10.1016/j.rvsc.2005.12.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2005] [Revised: 11/10/2005] [Accepted: 12/02/2005] [Indexed: 01/20/2023]
Abstract
The angiopoietin (Ang) family of proteins are central to the regulation of angiogenesis. The purposes of this study were to determine cDNA sequences of canine Ang-1 and Ang-2 and investigate their expressions in normal tissues and spontaneous tumours. The cDNA sequences of canine Ang-1 and Ang-2 were 1,494 and 1,488 bp, and the deduced amino acid sequences were 497 and 495 residues, respectively. The cDNA sequences of canine Ang-1 and Ang-2 showed high homology with those of the other mammalian species. Canine Ang-1 and Ang-2 mRNA were detectable in all 22 normal tissues and spontaneous tumours. Higher mRNA expression level of canine Ang-2 was demonstrated in mammary simple carcinomas, haemangiosarcoma and hepatocellular carcinoma in comparison with normal tissues.
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Affiliation(s)
- Y Kato
- Laboratory of Veterinary Surgery, Department of Veterinary Medicine, College of Bioresource Sciences, Nihon University, Kameino 1866, Fujisawa, Kanagawa 252-8510, Japan
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20
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Troy G, Huckle W, Rossmeisl J, Panciera D, Lanz O, Robertson J, Ward D. Endostatin and Vascular Endothelial Growth Factor Concentrations in Healthy Dogs, Dogs with Selected Neoplasia, and Dogs with Nonneoplastic Diseases. J Vet Intern Med 2006. [DOI: 10.1111/j.1939-1676.2006.tb02834.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
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21
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Abstract
Angiogenesis is a fundamental process in reproduction and wound healing. It is a tightly regulated process causing neovascularization. However, if angiogenesis becomes unregulated, it may be responsible for several disease processes such as brain tumour growth and metastasis. An understanding of the factors implicated in angiogenesis and its inhibition is essential if they are to be exploited as possible clinical treatments for brain tumours. Unfortunately, there are multiple factors known to be involved in the regulation of angiogenesis, and hence, the clinical application of any single agent may not be effective. This article summarizes the processes of blood vessel formation in the brain, examines the angiogenic factors that are important in the nervous system and discusses their role in brain tumour development and possible treatment.
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Affiliation(s)
- S R Platt
- Centre for Small Animal Studies, Animal Health Trust, Suffolk, UK.
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