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Brunetti B, de Biase D, Dellapina G, Muscatello LV, Ingravalle F, Tura G, Bacci B. Validation of p53 Immunohistochemistry (PAb240 Clone) in Canine Tumors with Next-Generation Sequencing (NGS) Analysis. Animals (Basel) 2023; 13:ani13050899. [PMID: 36899756 PMCID: PMC10000222 DOI: 10.3390/ani13050899] [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: 12/22/2022] [Revised: 02/24/2023] [Accepted: 02/28/2023] [Indexed: 03/06/2023] Open
Abstract
In human medicine, p53 immunohistochemistry (IHC) is a common method that is used for the identification of tumors with TP53 mutations. In veterinary medicine, several studies have performed IHC for p53 in canine tumors, but it is not known how well it actually predicts the mutation. The aim of this study was to estimate the accuracy of the IHC method for p53 (clone PAb240) using a lab-developed NGS panel to analyze TP53 mutations in a subset of malignant tumors in dogs. A total of 176 tumors were analyzed with IHC and then 41 were subjected to NGS analysis; among them, 15 were IHC positive and 26 were negative, and 16 out of 41 (39%) were found to be inadequate for NGS analysis. Excluding the non-evaluable cases at NGS, of the remaining eight IHC-positive cases, six were mutants and two were wild-type. Among the 17 IHC-negative cases, 13 were wild type, and 4 were mutants. The sensitivity was 60%, specificity was 86.7%, and the accuracy was 76%. These results suggest that when using IHC for p53 with this specific antibody to predict mutation, up to 25% wrong predictions can be expected.
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Affiliation(s)
- Barbara Brunetti
- Department of Veterinary Medical Sciences, University of Bologna, 40126 Bologna, Italy
| | - Dario de Biase
- Department of Pharmacy and Biotechnology, University of Bologna, 40126 Bologna, Italy
- Correspondence:
| | - Giulia Dellapina
- Department of Veterinary Medical Sciences, University of Bologna, 40126 Bologna, Italy
| | - Luisa Vera Muscatello
- Department of Veterinary Medical Sciences, University of Bologna, 40126 Bologna, Italy
| | - Francesco Ingravalle
- Biostatistics, Epidemiology and Risk Analysis (BEAR), Istituto Zooprofilattico Sperimentale del Piemonte, Liguria and Valle d’Aosta, 10154 Turin, Italy
| | - Giorgia Tura
- Department of Veterinary Medical Sciences, University of Bologna, 40126 Bologna, Italy
| | - Barbara Bacci
- Department of Veterinary Medical Sciences, University of Bologna, 40126 Bologna, Italy
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2
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Reineking W, Schauerte IE, Junginger J, Hewicker-Trautwein M. Sox9, Hopx, and survivin and tuft cell marker DCLK1 expression in normal canine intestine and in intestinal adenoma and adenocarcinoma. Vet Pathol 2022; 59:415-426. [DOI: 10.1177/03009858221079666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Self-renewal of the intestinal epithelium originates from stem cells located at the crypt base. Upregulation of various stem cell markers in intestinal epithelial neoplasms indicates a potential role of stem cells in tumorigenesis. In this study, the immunoreactivity of potential intestinal stem cell markers ( Sry box transcription factor 9 [Sox9], homeodomain-only protein [Hopx], survivin) and tuft cell marker doublecortin-like kinase 1 (DCLK1) in normal canine intestine and intestinal epithelial neoplasms was investigated. Formalin-fixed paraffin-embedded (FFPE) small and large intestine as well as intestinal neoplasms (55 colorectal adenomas [CRAs], 17 small intestinal adenocarcinomas [SICs], and 12 colorectal adenocarcinomas [CRCs]) were analyzed immunohistologically. Potential stem cell markers Sox9, Hopx, and survivin were detected in the crypts of normal canine small and large intestine. DCLK1+ tuft cells were present in decreasing numbers along the crypt-villus axis of the jejunum and rarely detectable in large intestine. In canine intestinal epithelial tumors, nuclear Sox9 immunoreactivity was detectable in 84.9% (CRA), 80% (CRC), and 77% of epithelial neoplastic cells (SIC). Hopx and survivin were expressed within cytoplasm and nuclei of neoplastic cells in benign and malignant tumors. DCLK1 showed a cytoplasmic reaction within neoplastic cells. The combined score of Hopx, DCLK1, and survivin varied among the examined cases. Overall, malignant tumors showed lower DCLK1 scores but higher Hopx scores in comparison with benign tumors. For survivin, no differences were detectable. In conclusion, stem cell markers Sox9, Hopx, and survivin were detectable at the crypt base and the immunoreactivity of Sox9, DCLK1, survivin, and Hopx was increased in canine intestinal adenomas and adenocarcinomas compared with normal mucosa.
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3
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Luu AK, Wood GA, Viloria-Petit AM. Recent Advances in the Discovery of Biomarkers for Canine Osteosarcoma. Front Vet Sci 2021; 8:734965. [PMID: 34660770 PMCID: PMC8517113 DOI: 10.3389/fvets.2021.734965] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Accepted: 09/03/2021] [Indexed: 12/14/2022] Open
Abstract
Canine osteosarcoma (OSA) is an aggressive malignancy that frequently metastasizes to the lung and bone. Not only has there been essentially no improvement in therapeutic outcome over the past 3 decades, but there is also a lack of reliable biomarkers in clinical practice. This makes it difficult to discriminate which patients will most benefit from the standard treatment of amputation and adjuvant chemotherapy. The development of reliable diagnostic biomarkers could aid in the clinical diagnosis of primary OSA and metastasis; while prognostic, and predictive biomarkers could allow clinicians to stratify patients to predict response to treatment and outcome. This review summarizes biomarkers that have been explored in canine OSA to date. The focus is on molecular biomarkers identified in tumor samples as well as emerging biomarkers that have been identified in blood-based (liquid) biopsies, including circulating tumor cells, microRNAs, and extracellular vesicles. Lastly, we propose future directions in biomarker research to ensure they can be incorporated into a clinical setting.
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Affiliation(s)
- Anita K Luu
- Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
| | - Geoffrey A Wood
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
| | - Alicia M Viloria-Petit
- Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
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4
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García-Iglesias MJ, Cuevas-Higuera JL, Bastida-Sáenz A, de Garnica-García MG, Polledo L, Perero P, González-Fernández J, Fernández-Martínez B, Pérez-Martínez C. Immunohistochemical detection of p53 and pp53 Ser 392 in canine hemangiomas and hemangiosarcomas located in the skin. BMC Vet Res 2020; 16:239. [PMID: 32660487 PMCID: PMC7359283 DOI: 10.1186/s12917-020-02457-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2019] [Accepted: 07/06/2020] [Indexed: 12/12/2022] Open
Abstract
Background p53 protein is essential for the regulation of cell proliferation. Aberrant accumulation of it usually occurs in cutaneous malignancies. Mutant p53 is detected by immunohistochemistry because it is more stable than the wild-type p53. However, post-translational modifications of p53 in response to ultraviolet radiation are important mechanisms of wild-type p53 stabilization, leading to positive staining in the absence of mutation. The aims were: 1) to analyze the immunohistochemical expression of p53 and phospho-p53 Serine392 in canine skin endothelial tumours; and 2) to determine if any relationship exists between p53 and phospho-p53 Serine392 overexpression and cell proliferation. Results p53 and phospho-p53 Serine392 immunolabeling was examined in 40 canine cutaneous endothelial tumours (13 hemangiomas and 27 hemangiosarcomas). Their expression was associated with tumour size, hemangiosarcoma stage (dermal versus hypodermal), histological diagnosis and proliferative activity (mitotic count and Ki-67 index). Statistical analysis revealed a significant increase of p53 immunoreactivity in hemangiosarcomas (median, 74.61%; interquartile range [IQR], 66.97–82.98%) versus hemangiomas (median, 0%; IQR, 0–20.91%) (p < .001) and in well-differentiated hemangiosarcomas (median, 82.40%; IQR, 66.49–83.17%) versus hemangiomas (p = .002). Phospho-p53 Serine392 immunoreactivity was significantly higher in hemangiosarcomas (median, 53.80%; IQR, 0–69.50%) than in hemangiomas (median, 0%; IQR, 0.0%) (p < .001). Positive correlation of the overexpression of p53 and phospho-p53 Serine392 with mitotic count and Ki-67 index was found in the cutaneous vascular tumours (p < .001). The Ki-67 index of the hemangiomas (median, 0.50%; IQR, 0–2.80%) was significantly lower than that of the hemangiosarcomas (median, 34.85%; IQR, 23.88–42.33%) (p < .001), and that specifically of well-differentiated hemangiosarcomas (median, 24.60%; IQR, 15.45–39.35%) (p = .001). Immunolabeling of 18 visceral hemangiosarcomas showed that the p53 (median, 41.59%; IQR, 26.89–64.87%) and phospho-p53 Serine392 (median, 0%; IQR, 0–22.53%) indexes were significantly lower than those of skin (p = .001; p = .006, respectively). Conclusions The p53 and phospho-p53 Serine392overexpression together with high proliferative activity in hemangiosarcomas versus hemangiomas indicated that p53 might play a role in the acquisition of malignant phenotypes in cutaneous endothelial neoplasms in dogs. The Ki-67 index may be useful in distinguishing canine well-differentiated hemangiosarcomas from hemangiomas.
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Affiliation(s)
- María José García-Iglesias
- Histology and Pathological Anatomy Section, Department of Animal Health, Faculty of Veterinary Medicine, University of León, León, Spain.,Institute of Biomedicine (IBIOMED), University of León, León, Spain
| | - Jose Luis Cuevas-Higuera
- Histology and Pathological Anatomy Section, Department of Animal Health, Faculty of Veterinary Medicine, University of León, León, Spain
| | - Ana Bastida-Sáenz
- Histology and Pathological Anatomy Section, Department of Animal Health, Faculty of Veterinary Medicine, University of León, León, Spain
| | | | | | - Paula Perero
- Histology and Pathological Anatomy Section, Department of Animal Health, Faculty of Veterinary Medicine, University of León, León, Spain
| | | | | | - Claudia Pérez-Martínez
- Histology and Pathological Anatomy Section, Department of Animal Health, Faculty of Veterinary Medicine, University of León, León, Spain. .,Institute of Biomedicine (IBIOMED), University of León, León, Spain.
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5
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Liu Y, Guan J, Chen X. Identification of Differentially Expressed Genes under the Regulation of Transcription Factors in Osteosarcoma. Pathol Oncol Res 2018; 25:1091-1102. [PMID: 30411296 DOI: 10.1007/s12253-018-0519-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Accepted: 10/25/2018] [Indexed: 12/11/2022]
Abstract
The present study was to investigate and identify the differentially expressed genes (DEGs) in the transcriptional regulatory network of osteosarcoma (OS). The gene expression dataset from Gene Expression Omnibus (GEO) datasets was downloaded. DEGs were identified and their functional annotation was also conducted. In addition, differentially expressed transcription factors (TFs) and the regulatory genes were identified. The electronic validation was used to verify the expression of selected genes. The integrated analysis led to 932 DEGs. The results of functional annotation indicated that these DEGs significantly enriched in the p53 signaling pathway, Jak-STAT signaling pathway and Wnt signaling pathway. ZNF354C, NFIC, NFATC2, SP2, FOXO3, EGR1, ZEB1, RREB1, EGR2 and SRF were covered by most TFs. The expression levels of NFIC and EGR2 in electronic validation were compatible with our bio-informatics result. In conclusion, the deregulation of these genes may provide valuable information in understanding the underlying molecular mechanism in the OS.
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Affiliation(s)
- Yang Liu
- Department of Orthopaedics, The First Affiliated Hospital of Bengbu Medical College, No. 287, ChangHuai Road, Bengbu, 233004, Anhui Province, China
| | - Jianzhong Guan
- Department of Orthopaedics, The First Affiliated Hospital of Bengbu Medical College, No. 287, ChangHuai Road, Bengbu, 233004, Anhui Province, China.
| | - Xiaotian Chen
- Department of Orthopaedics, The First Affiliated Hospital of Bengbu Medical College, No. 287, ChangHuai Road, Bengbu, 233004, Anhui Province, China
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6
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Bongiovanni L, Caposano F, Romanucci M, Grieco V, Malatesta D, Brachelente C, Massimini M, Benazzi C, Thomas RE, Salda LD. Survivin and Sox9: Potential Stem Cell Markers in Canine Normal, Hyperplastic, and Neoplastic Canine Prostate. Vet Pathol 2018; 56:200-207. [PMID: 30131013 DOI: 10.1177/0300985818794161] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Canine prostatic carcinoma is a relevant model for human prostatic carcinoma. Survivin is proposed as a biomarker of malignancy in human prostatic cancer. Sox9 is a stem cell marker required for prostate development and expressed in several adult tissues. The aims of the present study were to evaluate the patterns and expression levels of 2 putative stem cell markers, survivin and Sox9, in canine benign prostatic hyperplasia (BPH) and prostatic carcinoma to investigate their potential as stem cell markers. Immunohistochemistry with specific antibodies was performed on 3 samples of normal prostate gland, 18 samples of canine BPH, and 16 samples of prostatic carcinoma. The basal cell layer of normal and hyperplastic prostatic lobules had nuclear Sox9 immunolabeling and nuclear and rarely cytoplasmic survivin immunostaining, identifying them as potential stem cell markers. Significantly more frequent survivin and Sox9 expression (≥10% of nuclei) was observed in prostatic carcinoma as compared with BPH. The potential coexpression of survivin with Sox9, androgen receptor, and p63 was also investigated in selected BPH and prostatic carcinoma cases with immunofluorescence, and a partial colocalization was observed. Results indicate that Sox9 and survivin could be considered markers of stemness in canine prostate cells. Given its role in proliferation, cells in the basal cell layer with nuclear survivin expression are likely to be transit-amplifying cells that maintain some stem cell proprieties.
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Affiliation(s)
- Laura Bongiovanni
- 1 Faculty of Veterinary Medicine, University of Teramo, Teramo, Italy.,2 Department of Pathobiology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, the Netherlands
| | | | | | - Valeria Grieco
- 3 Department of Veterinary Science and Public Health, University of Milan, Milan, Italy
| | - Daniela Malatesta
- 1 Faculty of Veterinary Medicine, University of Teramo, Teramo, Italy
| | - Chiara Brachelente
- 4 Department of Veterinary Medicine, University of Perugia, Perugia, Italy
| | | | - Cinzia Benazzi
- 5 Department of Veterinary Medical Sciences, University of Bologna, Bologna, Italy
| | - Rachel E Thomas
- 2 Department of Pathobiology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, the Netherlands
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7
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Rici REG, Will SEAL, Luna ACL, Melo LF, Santos AC, Rodrigues RF, Leandro RM, Maria DA. Combination therapy of canine osteosarcoma with canine bone marrow stem cells, bone morphogenetic protein and carboplatin in an in vivo model. Vet Comp Oncol 2018; 16:478-488. [DOI: 10.1111/vco.12404] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Revised: 04/18/2018] [Accepted: 04/19/2018] [Indexed: 12/11/2022]
Affiliation(s)
- R. E. G. Rici
- School of Veterinary Medicine and Animal Science; Cidade Universitária, University of São Paulo; São Paulo Brazil
| | - S. E. A. L. Will
- Laboratory of Biochemistry and Biophysics; Butantan Institute; São Paulo Brazil
| | - A. C. L. Luna
- Laboratory of Biochemistry and Biophysics; Butantan Institute; São Paulo Brazil
| | - L. F. Melo
- School of Veterinary Medicine and Animal Science; Cidade Universitária, University of São Paulo; São Paulo Brazil
| | - A. C. Santos
- School of Veterinary Medicine and Animal Science; Cidade Universitária, University of São Paulo; São Paulo Brazil
| | - R. F. Rodrigues
- School of Veterinary Medicine and Animal Science; Cidade Universitária, University of São Paulo; São Paulo Brazil
| | - R. M. Leandro
- School of Veterinary Medicine and Animal Science; Cidade Universitária, University of São Paulo; São Paulo Brazil
| | - D. A. Maria
- Laboratory of Biochemistry and Biophysics; Butantan Institute; São Paulo Brazil
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8
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Russell DS, Jaworski L, Kisseberth WC. Immunohistochemical detection of p53, PTEN, Rb, and p16 in canine osteosarcoma using tissue microarray. J Vet Diagn Invest 2018; 30:504-509. [PMID: 29629647 DOI: 10.1177/1040638718770239] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Although inactivating mutations of tumor suppressor genes are well described in cell lines of canine osteosarcoma (OS), expression of tumor suppressor proteins in spontaneous disease is poorly characterized. We determined the immunohistochemical expression of p53, PTEN, Rb, and p16 in a large cohort of dogs with OS. Formalin-fixed, paraffin-embedded samples of canine OS were analyzed retrospectively. Primary tumor samples from 145 dogs, collected between 2003 and 2008, were evaluated by tissue microarray. Streptavidin-biotin complex immunohistochemistry was performed using monoclonal antibodies for Rb and PTEN and polyclonal antibodies for p16 and p53. The average age of dogs was 7.6 y, and 118 of 145 (81%) were purebred. Most commonly represented purebreds were Greyhound (23%), Rottweiler (11%), and Labrador Retriever (10%). Immunohistochemical detection of p53, PTEN, Rb, and p16 was 81%, 61%, 66%, and 66%, respectively. The staining pattern for p16 was primarily cytoplasmic; the predominant pattern for PTEN, Rb, and p53 was cytoplasmic and nuclear. Exclusively cytoplasmic staining was noted in 19% of samples positive for p53 and 8% of samples positive for Rb. Kaplan-Meier curves showed that protein expression was not associated with significant differences in overall survival ( p > 0.191). We documented heterogeneity in both immunostaining and subcellular localization of tumor suppressor proteins, providing further characterization of canine OS.
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Affiliation(s)
- Duncan S Russell
- Department of Biomedical Sciences, College of Veterinary Medicine, Oregon State University, Corvallis, OR (Russell).,Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH (Jaworski, Kisseberth)
| | - Lauren Jaworski
- Department of Biomedical Sciences, College of Veterinary Medicine, Oregon State University, Corvallis, OR (Russell).,Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH (Jaworski, Kisseberth)
| | - William C Kisseberth
- Department of Biomedical Sciences, College of Veterinary Medicine, Oregon State University, Corvallis, OR (Russell).,Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH (Jaworski, Kisseberth)
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9
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Massimini M, Palmieri C, De Maria R, Romanucci M, Malatesta D, De Martinis M, Maniscalco L, Ciccarelli A, Ginaldi L, Buracco P, Bongiovanni L, Della Salda L. 17-AAG and Apoptosis, Autophagy, and Mitophagy in Canine Osteosarcoma Cell Lines. Vet Pathol 2016; 54:405-412. [PMID: 28438108 DOI: 10.1177/0300985816681409] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Canine osteosarcoma is highly resistant to current chemotherapy; thus, clarifying the mechanisms of tumor cell resistance to treatments is an urgent need. We tested the geldanamycin derivative 17-AAG (17-allylamino-17-demethoxygeldanamycin) prototype of Hsp90 (heat shock protein 90) inhibitors in 2 canine osteosarcoma cell lines, D22 and D17, derived from primary and metastatic tumors, respectively. With the aim to understand the interplay between cell death, autophagy, and mitophagy, in light of the dual effect of autophagy in regulating cancer cell viability and death, D22 and D17 cells were treated with different concentrations of 17-AAG (0.5 μM, 1 μM) for 24 and 48 hours. 17-AAG-induced apoptosis, necrosis, autophagy, and mitophagy were assessed by transmission electron microscopy, flow cytometry, and immunofluorescence. A simultaneous increase in apoptosis, autophagy, and mitophagy was observed only in the D22 cell line, while D17 cells showed low levels of apoptotic cell death. These results reveal differential cell response to drug-induced stress depending on tumor cell type. Therefore, pharmacological treatments based on proapoptotic chemotherapy in association with autophagy regulators would benefit from a predictive in vitro screening of the target cell type.
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Affiliation(s)
- M Massimini
- 1 Faculty of Veterinary Medicine, University of Teramo, Teramo, Italy
| | - C Palmieri
- 2 School of Veterinary Science, University of Queensland, Gatton, Queensland, Australia
| | - R De Maria
- 3 Department of Veterinary Medicine, Animal Pathology, University of Turin, Grugliasco, Italy
| | - M Romanucci
- 1 Faculty of Veterinary Medicine, University of Teramo, Teramo, Italy
| | - D Malatesta
- 1 Faculty of Veterinary Medicine, University of Teramo, Teramo, Italy
| | - M De Martinis
- 4 Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - L Maniscalco
- 3 Department of Veterinary Medicine, Animal Pathology, University of Turin, Grugliasco, Italy
| | - A Ciccarelli
- 5 Faculty of Communication Sciences, University of Teramo, Teramo, Italy
| | - L Ginaldi
- 4 Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - P Buracco
- 3 Department of Veterinary Medicine, Animal Pathology, University of Turin, Grugliasco, Italy
| | - L Bongiovanni
- 1 Faculty of Veterinary Medicine, University of Teramo, Teramo, Italy
| | - L Della Salda
- 1 Faculty of Veterinary Medicine, University of Teramo, Teramo, Italy
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10
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Meyer FRL, Walter I. Establishment and Characterization of New Canine and Feline Osteosarcoma Primary Cell Lines. Vet Sci 2016; 3:E9. [PMID: 29056719 PMCID: PMC5644629 DOI: 10.3390/vetsci3020009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Revised: 05/13/2016] [Accepted: 05/25/2016] [Indexed: 12/27/2022] Open
Abstract
Osteosarcomas are the most abundant form of bone malignancies in multiple species. Canine osteosarcomas are considered a valuable model for human osteosarcomas because of their similar features. Feline osteosarcomas, on the other hand, are rarely studied but have interesting characteristics, such as a better survival prognosis than dogs or humans, and less likelihood of metastasis. To enable experimental approaches to study these differences we have established five new canine osteosarcoma cell lines out of three tumors, COS_1186h, COS_1186w, COS_1189, and COS_1220, one osteosarcoma-derived lung metastasis, COS_1033, and two new feline osteosarcoma cell lines, FOS_1077 and FOS_1140. Their osteogenic and neoplastic origin, as well as their potential to produce calcified structures, was determined by the markers osteocalcin, osteonectin, tissue unspecific alkaline phosphatase, p53, cytokeratin, vimentin, and alizarin red. The newly developed cell lines retained most of their markers in vitro but only spontaneously formed spheroids produced by COS_1189 showed calcification in vitro.
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Affiliation(s)
- Florian R L Meyer
- Department of Pathobiology, Institute of Anatomy, Histology and Embryology, University of Veterinary Medicine, Veterinaerplatz 1, Vienna 1210, Austria.
| | - Ingrid Walter
- Department of Pathobiology, Institute of Anatomy, Histology and Embryology, University of Veterinary Medicine, Veterinaerplatz 1, Vienna 1210, Austria.
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11
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Chen C, Zhao M, Tian A, Zhang X, Yao Z, Ma X. Aberrant activation of Wnt/β-catenin signaling drives proliferation of bone sarcoma cells. Oncotarget 2016; 6:17570-83. [PMID: 25999350 PMCID: PMC4627329 DOI: 10.18632/oncotarget.4100] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Accepted: 03/30/2015] [Indexed: 12/25/2022] Open
Abstract
Bone sarcomas such as osteosarcoma and chondrosarcoma are frequently refractory to conventional chemotherapy and radiotherapy that exhibit poor prognosis. The Wnt signaling are evolutionarily conserved and implicated in cell proliferation and sarcomagenesis. However, the potential role of the Wnt signaling in bone sarcomas is still unclear. Here we demonstrate aberrant activation of Wnt/β-catenin signaling in bone sarcoma cells, involving an autocrine Wnt signaling loop with upregulation of specific Wnt ligands and receptors. Activation of Wnt/β-catenin signaling with Wnt3a or GSK-3β inhibitor drives the proliferation of bone sarcoma cells, whereas downregulation of activated Wnt signaling with dnTCF4 or siLEF1 suppresses bone sarcoma proliferation and induces cell cycle arrest. Taken together, our findings establish the evidence that aberrant activation of Wnt/β-catenin pathway involving an autocrine Wnt singaling drives the proliferation of bone sarcoma cells, and identify the autocrine activation of the Wnt/β-catenin signaling as a potential novel therapeutic target for bone sarcomas.
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Affiliation(s)
- Changbao Chen
- Department of Spinal Surgery, Tianjin Hospital, Tianjin, P. R. China
| | - Meng Zhao
- Department of Immunology, Tianjin Key Laboratory of Cellular and Molecular Immunology, Key Laboratory of Educational Ministry of China, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, P. R. China
| | - Aixian Tian
- Department of Medical Laboratory, Tianjin Hospital, Tianjin, P. R. China
| | - Xiaolin Zhang
- Department of Spinal Surgery, Tianjin Hospital, Tianjin, P. R. China
| | - Zhi Yao
- Department of Immunology, Tianjin Key Laboratory of Cellular and Molecular Immunology, Key Laboratory of Educational Ministry of China, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, P. R. China
| | - Xinlong Ma
- Department of Spinal Surgery, Tianjin Hospital, Tianjin, P. R. China
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12
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Qiu Q, Jiang J, Lin L, Cheng S, Xin D, Jiang W, Shen J, Hu Z. Downregulation of RSK2 influences the biological activities of human osteosarcoma cells through inactivating AKT/mTOR signaling pathways. Int J Oncol 2016; 48:2508-20. [PMID: 27082640 DOI: 10.3892/ijo.2016.3481] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2016] [Accepted: 02/18/2016] [Indexed: 11/06/2022] Open
Abstract
RSK2 (90 kDa ribosomal S6 kinase) is a downstream effector of the Ras/ERK (extracellular signal-regulated kinase) signaling pathway that has major functions in cell biological activities, including regulating nuclear signaling, cell cycle progression, cell proliferation, cell growth, protein synthesis, cell migration and cell survival, and is expressed in most types of human malignant tumors, including lung cancer, prostate and breast tumors, skin cancer and osteosarcomas (OS). RSK2 was found to be essential for osteosarcoma formation. To investigate whether RSK2 is expressed at high levels in human osteosarcome tissues and whether its expression is correlated with the aggressive biological behavior of osteosarcoma cell line (OCLs), we assessed the association between RSK2 expression and OS cell progression, as well as the effects of RSK2 inhibition on the biological activities of osteosarcoma cells. We performed immunohistochemistry to analyze the expression of RSK2 in specimens from 30 humans with osteosarcoma, and 15 normal tissues. RSK2 gene expression levels in 30 specimens with osteosarcoma were significantly higher than those of normal tissues. We performed RNA interference on three OCLs to evaluate cell apoptosis, cell growth, cell proliferation, cell motility, chemosensitivity and oncogenicity. After transfection with RSK2 shRNA, increased cell apoptosis, cell growth inhibition, cell cycle progression, weaker cell proliferation, cell migration and weaker tumor formation were observed in all OCLs. These results suggested that RSK2 expression may mediate the biological activities of OS cells and RSK2 may be an effective therapeutic target for the treatment of osteosarcomas. The AKT/mTOR, MAPK/ERK/c-Fos and Bcl2/Bax pathways were analysed to clarify the mechanisms involved.
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Affiliation(s)
- Quanhe Qiu
- Department of Orthopaedic Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
| | - Jing Jiang
- Department of Clinical Laboratory, The Third Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330008, P.R. China
| | - Liangbo Lin
- Department of Orthopaedic Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
| | - Si Cheng
- Department of Orthopaedic Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
| | - Daqi Xin
- Department of Orthopaedic Surgery, The Second Affiliated Hospital of Neimenggu Medical University, Huhehaote, Neimeng 010030, P.R. China
| | - Wei Jiang
- Department of Orthopaedic Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
| | - Jieliang Shen
- Department of Orthopaedic Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
| | - Zhenming Hu
- Department of Orthopaedic Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
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13
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Senol S, Yildirim A, Ceyran B, Uruc F, Zemheri E, Ozkanli S, Akalin I, Ulus I, Caskurlu T, Aydin A. Prognostic significance of survivin, β-catenin and p53 expression in urothelial carcinoma. Bosn J Basic Med Sci 2015; 15:7-14. [PMID: 26614845 DOI: 10.17305/bjbms.2015.556] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Revised: 06/30/2015] [Accepted: 07/01/2015] [Indexed: 11/16/2022] Open
Abstract
Survivin, β-catenin, and p53 are well-known cell-cycle and apoptosis regulators of tumorigenesis. Urothelial carcinomas (UCs) are the most common of the human cancers. Compared to superficial tumors (Ta, CIS, or T1), invasive UCs are important with regard to recurrence, progression, and mortality. Therefore, we examined whether survivin, β-catenin, and p53 could be used as the biomarkers for the early prediction of the invasiveness of UCs and the overall survival of the patients. We investigated the prognostic expressions of those biomarkers in UC (n=147) and in non-muscle invasive UC (NMI-UC) (n=113), using tissue microarray and immunohistochemistry. Spearman's correlation analysis and multivariate Cox regression analyses were used for statistical interpretation. High expressions of β-catenin, survivin, and p53 were associated with a high T stage, recurrence, progression, mortality, low recurrence-free survival, low progression-free survival and low overall survival (p <0.01). Similar findings were achieved for recurrence and progression in the NMI-UC group, except for mortality. Moreover, a positive correlation was shown between p53 and β-catenin and between p53 and survivin (r=0.221, p <0.01; r=0.236, p <0.01, respectively). Survivin, p53, and β-catenin overexpression, as prognostic markers, might suggest that the UCs are biologically aggressive with the poor prognosis. Thus, dysregulation of those these cell-cycle and apoptosis regulators in bladder carcinoma could be used as a molecular marker to determine the best treatment strategy and could contribute to the development of targeted therapies.
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Affiliation(s)
- Serkan Senol
- Medeniyet Univercity Goztepe Research and Training Hospital Istanbul TURKEY.
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14
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Bongiovanni L, D'Andrea A, Porcellato I, Ciccarelli A, Malatesta D, Romanucci M, Della Salda L, Mechelli L, Brachelente C. Canine cutaneous melanocytic tumours: significance of β-catenin and survivin immunohistochemical expression. Vet Dermatol 2015; 26:270-e59. [DOI: 10.1111/vde.12211] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/02/2015] [Indexed: 12/13/2022]
Affiliation(s)
- Laura Bongiovanni
- Faculty of Veterinary Medicine; University of Teramo; Piazza A. Moro 45 Teramo 64100 Italy
| | - Alessandra D'Andrea
- Faculty of Veterinary Medicine; University of Teramo; Piazza A. Moro 45 Teramo 64100 Italy
| | - Ilaria Porcellato
- Department of Veterinary Medicine; University of Perugia; Via San Costanzo 4 Perugia 06126 Italy
| | - Andrea Ciccarelli
- Faculty of Political Science; University of Teramo; Campus Coste Sant'Agostino Teramo 64100 Italy
| | - Daniela Malatesta
- Faculty of Veterinary Medicine; University of Teramo; Piazza A. Moro 45 Teramo 64100 Italy
| | - Mariarita Romanucci
- Faculty of Veterinary Medicine; University of Teramo; Piazza A. Moro 45 Teramo 64100 Italy
| | - Leonardo Della Salda
- Faculty of Veterinary Medicine; University of Teramo; Piazza A. Moro 45 Teramo 64100 Italy
| | - Luca Mechelli
- Department of Veterinary Medicine; University of Perugia; Via San Costanzo 4 Perugia 06126 Italy
| | - Chiara Brachelente
- Department of Veterinary Medicine; University of Perugia; Via San Costanzo 4 Perugia 06126 Italy
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15
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Nagamine E, Hirayama K, Matsuda K, Okamoto M, Ohmachi T, Kadosawa T, Taniyama H. Diversity of Histologic Patterns and Expression of Cytoskeletal Proteins in Canine Skeletal Osteosarcoma. Vet Pathol 2015; 52:977-84. [PMID: 25770040 DOI: 10.1177/0300985815574006] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Osteosarcoma (OS), the most common bone tumor, includes OS of the head (OSH) and appendicular OS (OSA). In dogs, it is classified into 6 histologic subtypes: osteoblastic, chondroblastic, fibroblastic, telangiectatic, giant cell, and poorly differentiated. This study investigated the significance of the histologic classification relevant to clinical outcome and the histologic and immunohistochemical relationships between pleomorphism and expression of cytoskeletal proteins in 60 cases each of OSH and OSA. Most neoplasms exhibited histologic diversity, and 64% of OS contained multiple subtypes. In addition to the above 6 subtypes, myxoid, round cell, and epithelioid subtypes were observed. Although the epithelioid subtypes were observed in only OSH, no significant difference in the frequency of other subtypes was observed. Also, no significant relevance was observed between the clinical outcome and histologic subtypes. Cytokeratin (CK) was expressed in both epithelioid and sarcomatoid tumor cells in various subtypes, and all CK-positive tumor cells also expressed vimentin. Vimentin and α-smooth muscle actin (SMA) were expressed in all subtypes. A few SMA-positive spindle-shaped tumor cells exhibited desmin expression. Glial fibrillary acidic protein-positive tumor cells were observed in many subtypes, and some of these cells showed neurofilament expression. Although OSH exhibited significantly stronger immunoreactivity for SMA than OSA, no significant difference in other cytoskeletal proteins was observed. Some tumor cells had cytoskeletal protein expression compatible with the corresponding histologic subtypes, such as CK in the epithelioid subtype and SMA in the fibroblastic subtype. Thus, canine skeletal OS is composed of pleomorphic and heterogenous tumor cells as is reflected in the diversity of histologic patterns and expression of cytoskeletal proteins.
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Affiliation(s)
- E Nagamine
- Department of Veterinary Pathology, School of Veterinary Medicine, Rakuno Gakuen University, Hokkaido, Japan
| | - K Hirayama
- Department of Veterinary Pathology, School of Veterinary Medicine, Rakuno Gakuen University, Hokkaido, Japan
| | - K Matsuda
- Department of Veterinary Pathology, School of Veterinary Medicine, Rakuno Gakuen University, Hokkaido, Japan
| | - M Okamoto
- Department of Veterinary Pathology, School of Veterinary Medicine, Rakuno Gakuen University, Hokkaido, Japan
| | | | - T Kadosawa
- Department of Small Animal Clinical Sciences, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Hokkaido, Japan
| | - H Taniyama
- Department of Veterinary Pathology, School of Veterinary Medicine, Rakuno Gakuen University, Hokkaido, Japan
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16
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Viall AK, Goodall CP, Stang B, Marley K, Chappell PE, Bracha S. Antagonism of serotonin receptor 1B decreases viability and promotes apoptosis in the COS canine osteosarcoma cell line. Vet Comp Oncol 2014; 14:e31-44. [PMID: 24916076 DOI: 10.1111/vco.12103] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Revised: 05/13/2014] [Accepted: 05/14/2014] [Indexed: 01/16/2023]
Abstract
Serotonin receptor 1B (5HTR1B) traditionally exhibits anti-proliferative activity in osteoblasts. We examined the expression and function of 5HTR1B in the COS canine osteosarcoma cell line and normal canine osteoblasts. Equal levels of 5HTR1B gene and protein expression were found between normal and malignant osteoblasts. Treatment with serotonin enhanced viability of osteosarcoma cells but not normal osteoblasts. Challenge with the 5HTR1B agonist anpirtoline caused no change in cell viability. Rather incubation with the specific receptor antagonist SB224289 caused reduction in osteoblast viability, with this effect more substantial in osteosarcoma cells. Investigation of this inhibitory activity showed 5HTR1B antagonism induces apoptosis in malignant cells. Evaluation of phosphorylated levels of CREB and ERK, transcriptional regulators associated with serotonin receptor signalling in osteoblasts, revealed aberrant 5HTR1B signalling in COS. Our results confirm the presence of 5HTR1B in a canine osteosarcoma cell line and highlight this receptor as a possible novel therapeutic target.
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Affiliation(s)
- A K Viall
- Department of Biomedical Sciences, College of Veterinary Medicine, Oregon State University, Corvallis, OR, USA
| | - C P Goodall
- Department of Biomedical Sciences, College of Veterinary Medicine, Oregon State University, Corvallis, OR, USA
| | - B Stang
- Department of Clinical Sciences, College of Veterinary Medicine, Oregon State University, Corvallis, OR, USA
| | - K Marley
- Department of Clinical Sciences, College of Veterinary Medicine, Oregon State University, Corvallis, OR, USA
| | - P E Chappell
- Department of Biomedical Sciences, College of Veterinary Medicine, Oregon State University, Corvallis, OR, USA
| | - S Bracha
- Department of Clinical Sciences, College of Veterinary Medicine, Oregon State University, Corvallis, OR, USA
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17
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Bongiovanni L, Romanucci M, Malatesta D, D’Andrea A, Ciccarelli A, Della Salda L. Survivin and Related Proteins in Canine Mammary Tumors. Vet Pathol 2014; 52:269-75. [DOI: 10.1177/0300985814529312] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Survivin is reexpressed in most human breast cancers, where its expression has been associated with tumor aggressiveness, poor prognosis, and poor response to therapy. Survivin expression was evaluated in 41 malignant canine mammary tumors (CMTs) by immunohistochemistry, in relation to histological grade and stage, and correlated with that of some related molecules (β-catenin, caspase 3, heat shock proteins) to understand their possible role in canine mammary tumorigenesis. An increase in nuclear survivin expression, compared with healthy mammary glands, was observed in CMTs, where nuclear immunolabeling was related to the presence of necrosis. No statistically significant relation was found between the expression of the investigated molecules and the histological grade or stage. The present study may suggest an important involvement of survivin in CMT tumorigenesis. Its overexpression in most of the cases evaluated might suggest that targeting survivin in CMTs may be a valid anticancer therapy.
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Affiliation(s)
- L. Bongiovanni
- Faculty of Veterinary Medicine, University of Teramo, Teramo, Italy
| | - M. Romanucci
- Faculty of Veterinary Medicine, University of Teramo, Teramo, Italy
| | - D. Malatesta
- Faculty of Veterinary Medicine, University of Teramo, Teramo, Italy
| | - A. D’Andrea
- Faculty of Veterinary Medicine, University of Teramo, Teramo, Italy
| | - A. Ciccarelli
- Faculty of Political Sciences, University of Teramo, Teramo, Italy
| | - L. Della Salda
- Faculty of Veterinary Medicine, University of Teramo, Teramo, Italy
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18
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Piskun CM, Stein TJ. β-Catenin transcriptional activity is minimal in canine osteosarcoma and its targeted inhibition results in minimal changes to cell line behaviour. Vet Comp Oncol 2013; 14:e4-e16. [PMID: 24256430 DOI: 10.1111/vco.12077] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2013] [Revised: 10/11/2013] [Accepted: 10/20/2013] [Indexed: 12/21/2022]
Abstract
Canine osteosarcoma (OS) is an aggressive malignancy associated with poor outcomes. Therapeutic improvements are likely to develop from an improved understanding of signalling pathways contributing to OS development and progression. The Wnt signalling pathway is of interest for its role in osteoblast differentiation, its dysregulation in numerous cancer types, and the relative frequency of cytoplasmic accumulation of β-catenin in canine OS. This study aimed to determine the biological impact of inhibiting canonical Wnt signalling in canine OS, by utilizing either β-catenin siRNA or a dominant-negative T-cell factor (TCF) construct. There were no consistent, significant changes in cell line behaviour with either method compared to parental cell lines. Interestingly, β-catenin transcriptional activity was three-fold higher in normal canine primary osteoblasts compared to canine OS cell lines. These results suggest canonical Wnt signalling is minimally active in canine OS and its targeted inhibition is not a relevant therapeutic strategy.
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Affiliation(s)
- Caroline M Piskun
- Department of Medical Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI, USA
| | - Timothy J Stein
- Department of Medical Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI, USA.,Institute for Clinical & Translational Research, University of Wisconsin-Madison, Madison, WI, USA.,Carbone Cancer Center, University of Wisconsin-Madison, Madison, WI, USA
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19
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Yamazaki H, Takagi S, Hoshino Y, Hosoya K, Okumura M. Inhibition of survivin influences the biological activities of canine histiocytic sarcoma cell lines. PLoS One 2013; 8:e79810. [PMID: 24260303 PMCID: PMC3829869 DOI: 10.1371/journal.pone.0079810] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2013] [Accepted: 09/25/2013] [Indexed: 01/27/2023] Open
Abstract
Canine histiocytic sarcoma (CHS) is an aggressive malignant neoplasm that originates from histiocytic lineage cells, including dendritic cells and macrophages, and is characterized by progressive local infiltration and a very high metastatic potential. Survivin is as an apoptotic inhibitory factor that has major functions in cell proliferation, including inhibition of apoptosis and regulation of cell division, and is expressed in most types of human and canine malignant neoplasms, including melanoma and osteosarcoma. To investigate whether survivin was expressed at high levels in CHS and whether its expression was correlated with the aggressive biological behavior of CHS, we assessed relation between survivin expression and CHS progression, as well as the effects of survivin inhibition on the biological activities of CHS cells. We comparatively analyzed the expression of 6 selected anti-apoptotic genes, including survivin, in specimens from 30 dogs with histiocytic sarcoma and performed annexin V staining to evaluate apoptosis, methylthiazole tetrazolium assays to assess cell viability and chemosensitivity, and latex bead assays to measure changes in phagocytic activities in 4 CHS cell lines and normal canine fibroblasts transfected with survivin siRNA. Survivin gene expression levels in 30 specimens were significantly higher than those of the other 6 genes. After transfection with survivin siRNA, apoptosis, cell growth inhibition, enhanced chemosensitivity, and weakened phagocytic activities were observed in all CHS cell lines. In contrast, normal canine fibroblasts were not significantly affected by survivin knockdown. These results suggested that survivin expression may mediate the aggressive biological activities of CHS and that survivin may be an effective therapeutic target for the treatment of CHS.
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Affiliation(s)
- Hiroki Yamazaki
- Laboratory of Veterinary Surgery, Department of Veterinary Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Hokkaido, Japan
| | - Satoshi Takagi
- Veterinary Teaching Hospital, Graduate School of Veterinary Medicine, Hokkaido University, Hokkaido, Japan
| | - Yuki Hoshino
- Veterinary Teaching Hospital, Graduate School of Veterinary Medicine, Hokkaido University, Hokkaido, Japan
| | - Kenji Hosoya
- Laboratory of Veterinary Surgery, Department of Veterinary Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Hokkaido, Japan
| | - Masahiro Okumura
- Laboratory of Veterinary Surgery, Department of Veterinary Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Hokkaido, Japan
- * E-mail:
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20
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Zhang XH, Feng R, Lv M, Jiang Q, Zhu HH, Qing YZ, Bao JL, Huang XJ, Zheng XL. Arsenic trioxide induces apoptosis in B-cell chronic lymphocytic leukemic cells through down-regulation of survivin via the p53-dependent signaling pathway. Leuk Res 2013; 37:1719-25. [PMID: 24211095 DOI: 10.1016/j.leukres.2013.09.019] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2013] [Revised: 09/20/2013] [Accepted: 09/21/2013] [Indexed: 01/21/2023]
Abstract
Arsenic trioxide (As2O3) can induce apoptosis in many tumors. However, the associated mechanisms are not clearly understood. We found that As2O3 significantly inhibited the proliferation of WSU-CLL cells and induced apoptosis in dose- and time-dependent manners. WSU-CLL cells treated with 2μM As2O3 showed survivin down-regulation and p53 up-regulation. Survivin siRNA combined with As2O3 further inhibited the proliferation of WSU-CLL cells. p53 inhibition by siRNA prevented the down-regulation of survivin by As2O3 and prevented the As2O3-induced cytotoxicity of WSU-CLL cells. These results suggest that As2O3 may be of therapeutic value for chronic lymphocytic leukemia.
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Affiliation(s)
- Xiao-Hui Zhang
- Peking University People's Hospital, Peking University Institute of Hematology, Beijing 100044, China.
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21
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Deng Z, Niu G, Cai L, Wei R, Zhao X. The prognostic significance of CD44V6, CDH11, and β-catenin expression in patients with osteosarcoma. BIOMED RESEARCH INTERNATIONAL 2013; 2013:496193. [PMID: 23971040 PMCID: PMC3732612 DOI: 10.1155/2013/496193] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2013] [Revised: 07/01/2013] [Accepted: 07/01/2013] [Indexed: 11/28/2022]
Abstract
This study aimed to examine the expression of and the relationship between CD44V6, CDH11, and β-catenin. The expression of these cell adhesion molecules was detected in 90 osteosarcoma and 20 osteochondroma specimens using immunohistochemistry. Associations between these parameters and clinicopathological data were also examined. The expression rates of CD44V6, CDH11, and β-catenin were 25.0% (5/20), 70.0% (14/20), and 20.0% (4/20) in osteochondroma specimens, respectively. Compared to osteochondromas, the proportions of expression of CD44V6 and β-catenin in osteosarcoma specimens increased to 65.6% (59/90) and 60.0% (54/90), respectively. However, the expression rate of CDH11 in osteosarcomas was reduced to 40.0% (36/90). The expression of these markers was significantly associated with metastasis and overall survival (P < 0.05). Survival analysis revealed that patients with increased expression of CD44V6 and β-catenin as well as decreased expression of CDH11 were correlated with a shorter survival time. Multivariate analysis indicated that clinical stage, metastasis status, and the expression of CD44V6, CDH11, and β-catenin were found to be associated with overall survival. Further, the expression of β -catenin and that of CD44V6 were positively correlated with each other. Thus, our results indicated abnormal expression of CD44V6, CDH11, and β-catenin in osteosarcomas and osteochondromas, which may provide important indicators for further research.
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Affiliation(s)
- Zhouming Deng
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, No. 169 Donghu Road, Wuhan, Hubei Province 430071, China
| | - Guangfeng Niu
- Department of Spine, Shandong Provincial Hospital, Jinan 250021, China
| | - Lin Cai
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, No. 169 Donghu Road, Wuhan, Hubei Province 430071, China
| | - Renxiong Wei
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, No. 169 Donghu Road, Wuhan, Hubei Province 430071, China
| | - Xiaolei Zhao
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, No. 169 Donghu Road, Wuhan, Hubei Province 430071, China
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