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Zhang L, Yang H, Duan X, Li H, Xu S, Chen H, Wang J, Wang Y, Liu S. Modulation of autophagy affected tumorigenesis induced by the envelope glycoprotein of JSRV. Virology 2024; 594:110059. [PMID: 38518442 DOI: 10.1016/j.virol.2024.110059] [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] [Received: 12/17/2023] [Revised: 03/07/2024] [Accepted: 03/11/2024] [Indexed: 03/24/2024]
Abstract
Ovine pulmonary adenocarcinoma (OPA), caused by the jaagsiekte sheep retrovirus (JSRV), is a chronic, progressive, and contagious lung tumor that seriously affects sheep production. It also represents a valuable animal model for several human lung adenocarcinomas. However, little is known about the role of autophagy in OPA tumorigenesis. Here, Western blotting combined with transmission electron microscopy examination and Cyto-ID dye staining was employed for evaluation of changes of autophagic levels. The results of the present study showed that expression of the autophagy marker proteins Beclin-1 and LC3 was decreased in OPA lung tissues, as well as in cells overexpressing the envelope glycoprotein of JSRV (JSRV Env). Reduced numbers of autophagosomes were also observed in cells overexpressing JSRV Env, although assessment of autophagic flux showed that JSRV Env overexpression did not block the formation of autophagosomes, suggesting increased degradation of autolysosomes. Last, mouse xenograft experiments indicated that inhibition of autophagy by 3-methyladenine suppressed both tumor growth and the epithelial-to-mesenchymal transition. In conclusion, JSRV, through JSRV Env, takes advantage of the autophagy process, leading to the development of OPA.
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Affiliation(s)
- Liang Zhang
- College of Veterinary Medicine, Inner Mongolia Agricultural University, Hohhot, 010018, People's Republic of China; Key Laboratory of Clinical Diagnosis and Treatment Techniques for Animal Disease, Ministry of Agriculture, Hohhot, 010018, People's Republic of China; Inner Mongolia Key Laboratory of Basic Veterinary Medicine, Inner Mongolia Agricultural University, Hohhot, 010018, People's Republic of China
| | - Hui Yang
- College of Veterinary Medicine, Inner Mongolia Agricultural University, Hohhot, 010018, People's Republic of China
| | - Xujie Duan
- College of Veterinary Medicine, Inner Mongolia Agricultural University, Hohhot, 010018, People's Republic of China
| | - Huiping Li
- College of Veterinary Medicine, Inner Mongolia Agricultural University, Hohhot, 010018, People's Republic of China; Key Laboratory of Clinical Diagnosis and Treatment Techniques for Animal Disease, Ministry of Agriculture, Hohhot, 010018, People's Republic of China; Inner Mongolia Key Laboratory of Basic Veterinary Medicine, Inner Mongolia Agricultural University, Hohhot, 010018, People's Republic of China
| | - Siriguleng Xu
- College of Veterinary Medicine, Inner Mongolia Agricultural University, Hohhot, 010018, People's Republic of China; Key Laboratory of Clinical Diagnosis and Treatment Techniques for Animal Disease, Ministry of Agriculture, Hohhot, 010018, People's Republic of China; Inner Mongolia Key Laboratory of Basic Veterinary Medicine, Inner Mongolia Agricultural University, Hohhot, 010018, People's Republic of China
| | - Hui Chen
- College of Veterinary Medicine, Inner Mongolia Agricultural University, Hohhot, 010018, People's Republic of China; Key Laboratory of Clinical Diagnosis and Treatment Techniques for Animal Disease, Ministry of Agriculture, Hohhot, 010018, People's Republic of China
| | - Jinlin Wang
- College of Veterinary Medicine, Inner Mongolia Agricultural University, Hohhot, 010018, People's Republic of China; Key Laboratory of Clinical Diagnosis and Treatment Techniques for Animal Disease, Ministry of Agriculture, Hohhot, 010018, People's Republic of China; Inner Mongolia Key Laboratory of Basic Veterinary Medicine, Inner Mongolia Agricultural University, Hohhot, 010018, People's Republic of China
| | - Yu Wang
- College of Veterinary Medicine, Inner Mongolia Agricultural University, Hohhot, 010018, People's Republic of China; Key Laboratory of Clinical Diagnosis and Treatment Techniques for Animal Disease, Ministry of Agriculture, Hohhot, 010018, People's Republic of China
| | - Shuying Liu
- College of Veterinary Medicine, Inner Mongolia Agricultural University, Hohhot, 010018, People's Republic of China; Key Laboratory of Clinical Diagnosis and Treatment Techniques for Animal Disease, Ministry of Agriculture, Hohhot, 010018, People's Republic of China; Inner Mongolia Key Laboratory of Basic Veterinary Medicine, Inner Mongolia Agricultural University, Hohhot, 010018, People's Republic of China.
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The Sheep as a Large Animal Model for the Investigation and Treatment of Human Disorders. BIOLOGY 2022; 11:biology11091251. [PMID: 36138730 PMCID: PMC9495394 DOI: 10.3390/biology11091251] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 08/08/2022] [Accepted: 08/16/2022] [Indexed: 12/19/2022]
Abstract
Simple Summary We review the value of large animal models for improving the translation of biomedical research for human application, focusing primarily on sheep. Abstract An essential aim of biomedical research is to translate basic science information obtained from preclinical research using small and large animal models into clinical practice for the benefit of humans. Research on rodent models has enhanced our understanding of complex pathophysiology, thus providing potential translational pathways. However, the success of translating drugs from pre-clinical to clinical therapy has been poor, partly due to the choice of experimental model. The sheep model, in particular, is being increasingly applied to the field of biomedical research and is arguably one of the most influential models of human organ systems. It has provided essential tools and insights into cardiovascular disorder, orthopaedic examination, reproduction, gene therapy, and new insights into neurodegenerative research. Unlike the widely adopted rodent model, the use of the sheep model has an advantage over improving neuroscientific translation, in particular due to its large body size, gyrencephalic brain, long lifespan, more extended gestation period, and similarities in neuroanatomical structures to humans. This review aims to summarise the current status of sheep to model various human diseases and enable researchers to make informed decisions when considering sheep as a human biomedical model.
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Bühler L, Enderle MD, Kahn N, Polke M, Schneider MA, Heußel CP, Herth FJF, Linzenbold W. Establishment of a Tissue-Mimicking Surrogate for Pulmonary Lesions to Improve the Development of RFA Instruments and Algorithms. Biomedicines 2022; 10:biomedicines10051100. [PMID: 35625838 PMCID: PMC9138808 DOI: 10.3390/biomedicines10051100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 05/05/2022] [Accepted: 05/07/2022] [Indexed: 01/27/2023] Open
Abstract
(1) Development of radiofrequency ablation (RFA) systems for pulmonary lesions is restricted by availability of human tumor specimens and limited comparability of animal tissue. We aimed to develop a new surrogate tissue overcoming these drawbacks. (2) Reference values for electrical impedance in lung tumor tissue were collected during routine lung tumor RFA (n = 10). Subsequently, a tissue-mimicking surrogate with comparable electrical impedance and facilitating detection of the ablation margins was developed. (3) The mean electrical impedance for all patients was 103.5 ± 14.7 Ω. In the optimized surrogate tissue model consisting of 68% agar solution, 23% egg yolk, 9% thermochromic ink, and variable amounts of sodium chloride, the mean electrical impedance was adjustable from 74.3 ± 0.4 Ω to 183.2 ± 5.6 Ω and was a function (y = 368.4x + 175.2; R2 = 0.96; p < 0.001) of sodium chloride concentration (between 0 and 0.3%). The surrogate tissue achieved sufficient dimensional stability, and sample cuts revealed clear margins of color change for temperatures higher 60 °C. (4) The tissue-mimicking surrogate can be adapted to lung tumor with respect to its electrical properties. As the surrogate tissue allows for simple and cost-effective manufacturing, it is suitable for extensive laboratory testing of RFA systems for pulmonary ablation.
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Affiliation(s)
- Louisa Bühler
- Erbe Elektromedizin GmbH, 72072 Tübingen, Germany; (L.B.); (M.D.E.)
| | | | - Nicolas Kahn
- Department of Pneumology and Respiratory Care Medicine, Thoraxklinik at Heidelberg University Hospital, 69126 Heidelberg, Germany; (N.K.); (M.P.); (F.J.F.H.)
- Translational Lung Research Center Heidelberg (TLRC), Member of the German Center for Lung Research (DZL), University of Heidelberg, 69120 Heidelberg, Germany; (M.A.S.); (C.P.H.)
| | - Markus Polke
- Department of Pneumology and Respiratory Care Medicine, Thoraxklinik at Heidelberg University Hospital, 69126 Heidelberg, Germany; (N.K.); (M.P.); (F.J.F.H.)
- Translational Lung Research Center Heidelberg (TLRC), Member of the German Center for Lung Research (DZL), University of Heidelberg, 69120 Heidelberg, Germany; (M.A.S.); (C.P.H.)
| | - Marc A. Schneider
- Translational Lung Research Center Heidelberg (TLRC), Member of the German Center for Lung Research (DZL), University of Heidelberg, 69120 Heidelberg, Germany; (M.A.S.); (C.P.H.)
- Translational Research Unit, Thoraxklinik at Heidelberg University Hospital, 69126 Heidelberg, Germany
| | - Claus Peter Heußel
- Translational Lung Research Center Heidelberg (TLRC), Member of the German Center for Lung Research (DZL), University of Heidelberg, 69120 Heidelberg, Germany; (M.A.S.); (C.P.H.)
- Department of Diagnostic and Interventional Radiology, Heidelberg University Hospital, 69120 Heidelberg, Germany
- Department of Diagnostic and Interventional Radiology with Nuclear Medicine, Thoraxklinik at Heidelberg University Hospital, 69126 Heidelberg, Germany
| | - Felix J. F. Herth
- Department of Pneumology and Respiratory Care Medicine, Thoraxklinik at Heidelberg University Hospital, 69126 Heidelberg, Germany; (N.K.); (M.P.); (F.J.F.H.)
- Translational Lung Research Center Heidelberg (TLRC), Member of the German Center for Lung Research (DZL), University of Heidelberg, 69120 Heidelberg, Germany; (M.A.S.); (C.P.H.)
| | - Walter Linzenbold
- Erbe Elektromedizin GmbH, 72072 Tübingen, Germany; (L.B.); (M.D.E.)
- Correspondence: ; Tel.: +49-7071-755-2896
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Assessment of MDA and 8-OHdG expressions in ovine pulmonary adenocarcinomas by immunohistochemical and immunofluorescence methods. ACTA VET BRNO 2022. [DOI: 10.2754/avb202291030235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
This study aimed to reveal the presence of reactive oxygen species (ROS)-induced lipid peroxidation and DNA damage in ovine pulmonary adenocarcinomas (OPA) by evaluating malondialdehyde (MDA) and 8-hydroxy-2-deoxyguanosine (8-OHdG) expressions by immunohistochemical and immunofluorescence methods. Lung tissue samples were collected from 26 sheep brought to the Pathology Department for routine diagnosis. Lung tissues were fixed in 10% neutral buffered formalin, following routine procedures tissues were stained with hematoxylin and eosin. Avidin-Biotin Peroxidase method was used as immunohistochemical staining. Indirect immunofluorescence method was applied to the sections. Tumoral cells showed acinar, papillary or mixed type patterns. Only 2 of 20 cases metastasized to regional lymph nodes. All OPAs were immune positive for Jaagsiekte Sheep Retrovirus Capsid Protein (JSRV CA), MDA and 8-OHdG. The control group was negative for JSRV CA, MDA and 8-OHdG expressions. Malondialdehyde and 8-OHdG immune positive cells were statistically increased in the OPA group compared to the control group. In conclusion, our results demonstrate that higher MDA and 8-OHdG expressions in sheep with OPA suggest that OPA may be closely related to lipid peroxidation and oxidative DNA damage.
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Olive G, Yung R, Marshall H, Fong KM. Alternative methods for local ablation-interventional pulmonology: a narrative review. Transl Lung Cancer Res 2021; 10:3432-3445. [PMID: 34430378 PMCID: PMC8350102 DOI: 10.21037/tlcr-20-1185] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Accepted: 06/22/2021] [Indexed: 12/14/2022]
Abstract
OBJECTIVE To discuss and summarise the background and recent advances in the approach to bronchoscopic ablative therapies for lung cancer, focusing on focal parenchymal lesions. BACKGROUND This series focusses on the challenges highlighted by increasing recognition of the prognostically more favourable oligometastatic disease rather than the more frequent, but prognostically poor, high tumour burden metastatic disease. While surgery, stereotactic body radiation therapy (SBRT), and trans-thoracic percutaneous ablative techniques such as microwave (MWA) and radiofrequency ablation (RFA) are well recognised options for selected cases of pulmonary oligometastasis, bronchoscopic approaches to pulmonary tumour ablation are becoming realistic alternatives. An underlying tenet driving research and implementation in this domain is that percutaneous ablative techniques are obliged to traverse the pleura leading to a high rate of pneumothorax, and risks also goes up for peri-vascular lesions. Historically low yield bronchoscopic targeting of isolated peripheral tumors have significantly improved by incorporating multi-modality high resolution imaging and processing, including navigation planning and real-time image guidances (ultrasound, electromagnetic navigation, cone-beam CT). Combining advanced image guidance with ablative technology adaptations for bronchoscopic delivery opens up the options for high dose local ablative therapies that may reduce transthoracic complications and provide palliative to curative options for limited stage primary and oligometastatic diseases. METHODS We conduct a narrative review of the literature summarizing the history of bronchoscopic tumor ablation approaches, technical details including biologic rational for their uses, and current evidence for each modality, as well as investigations into future applications. Because of the relative paucity of prospective studies, we have been very inclusive in our inclusion of experiences from the published clinical databases. CONCLUSIONS Whilst surgical resection and SBRT remain the current mainstay of curative therapies for peripheral cancers, in the foreseeable future, developments and further research will see bronchoscopic ablative therapies become viable lung sparing alternatives in those deemed suitable. The future is bright.
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Affiliation(s)
- Gerard Olive
- Thoracic Medicine, The Prince Charles Hospital, Brisbane, Australia
- University of Queensland Thoracic Research Centre, Queensland, Australia
| | - Rex Yung
- Chief Medical Officer – IONIQ (ProLung) Inc., Salt Lake City, UT, USA
| | - Henry Marshall
- Thoracic Medicine, The Prince Charles Hospital, Brisbane, Australia
- University of Queensland Thoracic Research Centre, Queensland, Australia
| | - Kwun M. Fong
- Thoracic Medicine, The Prince Charles Hospital, Brisbane, Australia
- University of Queensland Thoracic Research Centre, Queensland, Australia
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Navas-Suárez PE, Sacristán C, Kluyber D, Yogui DR, Alves AC, Dalazen GT, Díaz-Delgado J, Guerra JM, de Azevedo Fernandes NCC, Réssio RA, da Silva TC, Cogliati B, Desbiez ALJ, Catão-Dias JL. Novel gammaherpesvirus associated with primary gastric T-cell lymphoma in a free-ranging giant armadillo in Brazil. Transbound Emerg Dis 2021; 69:2045-2051. [PMID: 34132049 DOI: 10.1111/tbed.14189] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 06/12/2021] [Accepted: 06/12/2021] [Indexed: 11/29/2022]
Abstract
The number of viral-associated neoplasms reported in wildlife has increased over the last decades, likely because of growing research efforts and a potentially greater burden of carcinogenic pathogens. Herein, we describe a primary gastric T-cell lymphoma in one free-ranging giant armadillo (Priodontes maximus) from Brazilian Pantanal infected by a novel gammaherpesvirus, proposed as Cingulatid gammaherpesvirus 1 (CiHV-1). By chromogenic in situ hybridisation against Epstein-Barr virus some neoplastic cells were labeled. Subsequently, a molecular screening was carried out to detect the occurrence of this pathogen in other giant armadillos in the same region. Overall, this novel virus was detected in 14.3% (3/21) of the tested giant armadillos. We suggest this herpesvirus, the first in Xenarthra, as a plausible aetiology of the neoplasm. The implications of CiHV-1 for this species are uncertain; while no outbreaks of disease have been recorded, the present study raises concerns. Further research is warranted to assess the real significance of CiHV-1 and its potential oncogenic role in this species.
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Affiliation(s)
- Pedro Enrique Navas-Suárez
- Laboratory of Wildlife Comparative Pathology, School of Veterinary Medicine and Animal Sciences, University of São Paulo, São Paulo, São Paulo State, Brazil
| | - Carlos Sacristán
- Laboratory of Wildlife Comparative Pathology, School of Veterinary Medicine and Animal Sciences, University of São Paulo, São Paulo, São Paulo State, Brazil
| | - Danilo Kluyber
- Giant Armadillo Conservation Project, Instituto de Conservação de Animais Silvestres (ICAS), Campo, Grande, Brazil.,Naples Zoo at Caribbeans Gardens, Naples, Florida, USA
| | - Débora Regina Yogui
- Giant Armadillo Conservation Project, Instituto de Conservação de Animais Silvestres (ICAS), Campo, Grande, Brazil.,The Royal Zoological Society of Scotland (RZSS), Edinburgh Zoo, Edinburgh, Scotland
| | - Amanda Carolina Alves
- Giant Armadillo Conservation Project, Instituto de Conservação de Animais Silvestres (ICAS), Campo, Grande, Brazil
| | - Gislaine Taimara Dalazen
- Laboratory of Wildlife Comparative Pathology, School of Veterinary Medicine and Animal Sciences, University of São Paulo, São Paulo, São Paulo State, Brazil
| | - Josué Díaz-Delgado
- Texas A&M Veterinary Medical Diagnostic Laboratory, College Station, Texas, USA
| | | | | | | | - Tereza Cristina da Silva
- Department of Pathology, School of Veterinary Medicine and Animal Sciences, University of São Paulo, São Paulo, São Paulo State, Brazil
| | - Bruno Cogliati
- Department of Pathology, School of Veterinary Medicine and Animal Sciences, University of São Paulo, São Paulo, São Paulo State, Brazil
| | - Arnaud Leonard Jean Desbiez
- Giant Armadillo Conservation Project, Instituto de Conservação de Animais Silvestres (ICAS), Campo, Grande, Brazil., , Nashville Zoo, Nashville, USA
| | - José Luiz Catão-Dias
- Laboratory of Wildlife Comparative Pathology, School of Veterinary Medicine and Animal Sciences, University of São Paulo, São Paulo, São Paulo State, Brazil
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Neoplasia-Associated Wasting Diseases with Economic Relevance in the Sheep Industry. Animals (Basel) 2021; 11:ani11020381. [PMID: 33546178 PMCID: PMC7913119 DOI: 10.3390/ani11020381] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 01/25/2021] [Accepted: 01/27/2021] [Indexed: 11/16/2022] Open
Abstract
We review three neoplastic wasting diseases affecting sheep generally recorded under common production cycles and with epidemiological and economic relevance in sheep-rearing countries: small intestinal adenocarcinoma (SIA), ovine pulmonary adenocarcinoma (OPA) and enzootic nasal adenocarcinoma (ENA). SIA is prevalent in Australia and New Zealand but present elsewhere in the world. This neoplasia is a tubular or signet-ring adenocarcinoma mainly located in the middle or distal term of the small intestine. Predisposing factors and aetiology are not known, but genetic factors or environmental carcinogens may be involved. OPA is a contagious lung cancer caused by jaagsiekte sheep retrovirus (JSRV) and has been reported in most sheep-rearing countries, resulting in significant economic losses. The disease is clinically characterized by a chronic respiratory process as a consequence of the development of lung adenocarcinoma. Diagnosis is based on the detection of JSRV in the tumour lesion by immunohistochemistry and PCR. In vivo diagnosis may be difficult, mainly in preclinical cases. ENA is a neoplasia of glands of the nasal mucosa and is associated with enzootic nasal tumour virus 1 (ENTV-1), which is similar to JSRV. ENA enzootically occurs in many countries of the world with the exception of Australia and New Zealand. The pathology associated with this neoplasia corresponds with a space occupying lesion histologically characterized as a low-grade adenocarcinoma. The combination of PCR and immunohistochemistry for diagnosis is advised.
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Harman RM, Das SP, Bartlett AP, Rauner G, Donahue LR, Van de Walle GR. Beyond tradition and convention: benefits of non-traditional model organisms in cancer research. Cancer Metastasis Rev 2020; 40:47-69. [PMID: 33111160 DOI: 10.1007/s10555-020-09930-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 09/01/2020] [Indexed: 02/07/2023]
Abstract
Traditional laboratory model organisms are indispensable for cancer research and have provided insight into numerous mechanisms that contribute to cancer development and progression in humans. However, these models do have some limitations, most notably related to successful drug translation, because traditional model organisms are often short-lived, small-bodied, genetically homogeneous, often immunocompromised, are not exposed to natural environments shared with humans, and usually do not develop cancer spontaneously. We propose that assimilating information from a variety of long-lived, large, genetically diverse, and immunocompetent species that live in natural environments and do develop cancer spontaneously (or do not develop cancer at all) will lead to a more comprehensive understanding of human cancers. These non-traditional model organisms can also serve as sentinels for environmental risk factors that contribute to human cancers. Ultimately, expanding the range of animal models that can be used to study cancer will lead to improved insights into cancer development, progression and metastasis, tumor microenvironment, as well as improved therapies and diagnostics, and will consequently reduce the negative impacts of the wide variety of cancers afflicting humans overall.
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Affiliation(s)
- Rebecca M Harman
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, NY, 14853, USA
| | - Sanjna P Das
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, NY, 14853, USA
| | - Arianna P Bartlett
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, NY, 14853, USA
| | - Gat Rauner
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, NY, 14853, USA
| | - Leanne R Donahue
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, NY, 14853, USA
| | - Gerlinde R Van de Walle
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, NY, 14853, USA.
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Hu Y, Ren S, He Y, Wang L, Chen C, Tang J, Liu W, Yu F. Possible Oncogenic Viruses Associated with Lung Cancer. Onco Targets Ther 2020; 13:10651-10666. [PMID: 33116642 PMCID: PMC7585805 DOI: 10.2147/ott.s263976] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Accepted: 09/02/2020] [Indexed: 01/01/2023] Open
Abstract
Lung cancer is the most common cause of cancer death worldwide. Tobacco smoking is the most predominant etiology for lung cancer. However, only a small percentage of heavy smokers develop lung cancer, which suggests that other cofactors are required for lung carcinogenesis. Viruses have been central to modern cancer research and provide profound insights into cancer causes. Nevertheless, the role of virus in lung cancer is still unclear. In this article, we reviewed the possible oncogenic viruses associated with lung cancer.
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Affiliation(s)
- Yan Hu
- Department of Thoracic Surgery, The Thoracic Surgery Research Room, Second Xiangya Hospital, Central South University, Changsha 410011, People's Republic of China
| | - Siying Ren
- Department of Respiratory Medicine, Hunan Centre for Evidence-Based Medicine, Research Unit of Respiratory Diseases, Second Xiangya Hospital, Central South University, Changsha 410011, People's Republic of China
| | - Yu He
- Department of Thoracic Surgery, The Thoracic Surgery Research Room, Second Xiangya Hospital, Central South University, Changsha 410011, People's Republic of China
| | - Li Wang
- Department of Thoracic Surgery, The Thoracic Surgery Research Room, Second Xiangya Hospital, Central South University, Changsha 410011, People's Republic of China
| | - Chen Chen
- Department of Thoracic Surgery, The Thoracic Surgery Research Room, Second Xiangya Hospital, Central South University, Changsha 410011, People's Republic of China
| | - Jingqun Tang
- Department of Thoracic Surgery, The Thoracic Surgery Research Room, Second Xiangya Hospital, Central South University, Changsha 410011, People's Republic of China
| | - Wenliang Liu
- Department of Thoracic Surgery, The Thoracic Surgery Research Room, Second Xiangya Hospital, Central South University, Changsha 410011, People's Republic of China
| | - Fenglei Yu
- Department of Thoracic Surgery, The Thoracic Surgery Research Room, Second Xiangya Hospital, Central South University, Changsha 410011, People's Republic of China
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Hoffman JM, Valencak TG. A short life on the farm: aging and longevity in agricultural, large-bodied mammals. GeroScience 2020; 42:909-922. [PMID: 32361879 PMCID: PMC7286991 DOI: 10.1007/s11357-020-00190-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Accepted: 04/15/2020] [Indexed: 12/27/2022] Open
Abstract
As average human lifespans increase across the globe, companion animals, specifically dogs and cats, are also living longer with more age-related morbidities. However, a similar trend is not seen in mammalian livestock species. Cows, pigs, goats, and sheep, as well as more niche mammalian species raised across the world, have been primarily raised for their economic benefit to humans and are culled from the population once their production declines. To this end, we lack clear knowledge about the age-related morbidities and causes of death that afflict livestock animals due to natural aging, as well as detailed age-specific survival rates. Here, we review the current state of the field of agricultural mammal aging, as well as provide specific questions and directions that may provide novel resources for veterinarians and aging biologists. By raising awareness of the overall quality of life and ongoing health of individual livestock animals, we can potentially increase production into older life stages, leading to decreased costs to farmers and improved welfare for the animals themselves.
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Affiliation(s)
- Jessica M. Hoffman
- Department of Biology, University of Alabama at Birmingham, 1300 University Blvd.,CH464, Birmingham, AL 35294 USA
| | - Teresa G. Valencak
- College of Animal Sciences, Zhejiang University, Zijingang Campus, 866 Yuhangtang Road, Hangzhou, 310058 People’s Republic of China
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Özkan C, Yıldırım S, Huyut Z, Özbek M. Selected Tumour Biomarker Levels in Sheep with Pulmonary Adenomatosis. J Vet Res 2020; 64:39-44. [PMID: 32258798 PMCID: PMC7105990 DOI: 10.2478/jvetres-2020-0017] [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: 07/07/2019] [Accepted: 02/21/2020] [Indexed: 12/29/2022] Open
Abstract
INTRODUCTION Sheep pulmonary adenomatosis (ovine pulmonary adenomatosis, OPA, Jaagsiekte) is a chronic contagious bronchoalveolar carcinoma caused by the Jaagsiekte sheep retrovirus. Since effective treatment and a vaccination procedure are not currently possible, control and eradication of the disease is difficult. It leads to serious economic losses around the world, therefore studies are currently underway in order to design control and eradication programmes. In this study, levels and changes in selected tumour markers (carcinoembryonic antigen (CEA), carbohydrate antigen (CA) 125, CA 19-9, CA 15-3, and alphafetoprotein (AFP)-3) and their diagnostic significance were investigated. MATERIAL AND METHODS A total of 30 sheep were used. Clinical examinations were performed and blood samples were obtained before slaughter from all animals with presumed OPA. Blood samples with positive OPA results by macroscopic and histopathological examination were included in the study as the experimental group and numbered 20. Sheep totalling 10 had negative OPA results and provided control samples. RESULTS CEA levels were similar in both groups, and the differences were statistically insignificant (P > 0.05). CA 125, CA 19-9, CA 15-3, and AFP-3 levels were higher in the OPA group than the control group and with statistical significance (P < 0.05). In all OPA animals, CA 125 levels were higher than 1 U/mL. CONCLUSION serum CAs and AFP levels increase significantly in adenomatous sheep. These tumour markers are thought to facilitate the diagnosis of OPA.
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Affiliation(s)
- Cumali Özkan
- Department of Internal Medicine, Faculty of Veterinary Medicine, Van Yüzüncü Yıl University, 65080, Van, Turkey
| | - Serkan Yıldırım
- Department of Pathology, Faculty of Veterinary Medicine, Atatürk University, 25240, Erzurum, Turkey
| | - Zübeyir Huyut
- Department of Biochemistry, Faculty of Medicine, Van Yüzüncü Yıl University, 65080, Van, Turkey
| | - Mustafa Özbek
- Department of Internal Medicine, Faculty of Veterinary Medicine, Van Yüzüncü Yıl University, 65080, Van, Turkey
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12
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Transcriptional Response of Ovine Lung to Infection with Jaagsiekte Sheep Retrovirus. J Virol 2019; 93:JVI.00876-19. [PMID: 31434729 PMCID: PMC6803282 DOI: 10.1128/jvi.00876-19] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 08/10/2019] [Indexed: 02/06/2023] Open
Abstract
Jaagsiekte sheep retrovirus (JSRV) is the etiologic agent of ovine pulmonary adenocarcinoma (OPA), a neoplastic lung disease of sheep. OPA is an important economic and welfare issue for sheep farmers and a valuable naturally occurring animal model for human lung adenocarcinoma. Here, we used RNA sequencing to study the transcriptional response of ovine lung tissue to infection by JSRV. We identified 1,971 ovine genes differentially expressed in JSRV-infected lung compared to noninfected lung, including many genes with roles in carcinogenesis and immunomodulation. The differential expression of selected genes was confirmed using immunohistochemistry and reverse transcription-quantitative PCR. A key finding was the activation of anterior gradient 2, yes-associated protein 1, and amphiregulin in OPA tumor cells, indicating a role for this oncogenic pathway in OPA. In addition, there was differential expression of genes related to innate immunity, including genes encoding cytokines, chemokines, and complement system proteins. In contrast, there was little evidence for the upregulation of genes involved in T-cell immunity. Many genes related to macrophage function were also differentially expressed, reflecting the increased abundance of these cells in OPA-affected lung tissue. Comparison of the genes differentially regulated in OPA with the transcriptional changes occurring in human lung cancer revealed important similarities and differences between OPA and human lung adenocarcinoma. This study provides valuable new information on the pathogenesis of OPA and strengthens the use of this naturally occurring animal model for human lung adenocarcinoma.IMPORTANCE Ovine pulmonary adenocarcinoma is a chronic respiratory disease of sheep caused by jaagsiekte sheep retrovirus (JSRV). OPA is a significant economic problem for sheep farmers in many countries and is a valuable animal model for some forms of human lung cancer. Here, we examined the changes in host gene expression that occur in the lung in response to JSRV infection. We identified a large number of genes with altered expression in infected lung, including factors with roles in cancer and immune system function. We also compared the data from OPA to previously published data from human lung adenocarcinoma and found a large degree of overlap in the genes that were dysregulated. The results of this study provide exciting new avenues for future studies of OPA and may have comparative relevance for understanding human lung cancer.
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Pessôa LVDF, Bressan FF, Freude KK. Induced pluripotent stem cells throughout the animal kingdom: Availability and applications. World J Stem Cells 2019; 11:491-505. [PMID: 31523369 PMCID: PMC6716087 DOI: 10.4252/wjsc.v11.i8.491] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 06/18/2019] [Accepted: 06/20/2019] [Indexed: 02/06/2023] Open
Abstract
Up until the mid 2000s, the capacity to generate every cell of an organism was exclusive to embryonic stem cells. In 2006, researchers Takahashi and Yamanaka developed an alternative method of generating embryonic-like stem cells from adult cells, which they coined induced pluripotent stem cells (iPSCs). Such iPSCs possess most of the advantages of embryonic stem cells without the ethical stigma associated with derivation of the latter. The possibility of generating “custom-made” pluripotent cells, ideal for patient-specific disease models, alongside their possible applications in regenerative medicine and reproduction, has drawn a lot of attention to the field with numbers of iPSC studies published growing exponentially. IPSCs have now been generated for a wide variety of species, including but not limited to, mouse, human, primate, wild felines, bovines, equines, birds and rodents, some of which still lack well-established embryonic stem cell lines. The paucity of robust characterization of some of these iPSC lines as well as the residual expression of transgenes involved in the reprogramming process still hampers the use of such cells in species preservation or medical research, underscoring the requirement for further investigations. Here, we provide an extensive overview of iPSC generated from a broad range of animal species including their potential applications and limitations.
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Affiliation(s)
- Laís Vicari de Figueiredo Pessôa
- Group of Stem Cell Models for Studies of Neurodegenerative Diseases, Section for Pathobiological Sciences, Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg 1870, Denmark
| | - Fabiana Fernandes Bressan
- Department of Veterinary Medicine, Faculty of Animal Science and Food Engineering, University of São Paulo, Pirassununga 13635-000, São Paulo, Brazil
| | - Kristine Karla Freude
- Group of Stem Cell Models for Studies of Neurodegenerative Diseases, Section for Pathobiological Sciences, Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg 1870, Denmark
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Gray ME, Sullivan P, Marland JRK, Greenhalgh SN, Meehan J, Gregson R, Clutton RE, Cousens C, Griffiths DJ, Murray A, Argyle D. A Novel Translational Ovine Pulmonary Adenocarcinoma Model for Human Lung Cancer. Front Oncol 2019; 9:534. [PMID: 31316911 PMCID: PMC6611418 DOI: 10.3389/fonc.2019.00534] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Accepted: 06/03/2019] [Indexed: 11/13/2022] Open
Abstract
In vitro cell line and in vivo murine models have historically dominated pre-clinical cancer research. These models can be expensive and time consuming and lead to only a small percentage of anti-cancer drugs gaining a license for human use. Large animal models that reflect human disease have high translational value; these can be used to overcome current pre-clinical research limitations through the integration of drug development techniques with surgical procedures and anesthetic protocols, along with emerging fields such as implantable medical devices. Ovine pulmonary adenocarcinoma (OPA) is a naturally-occurring lung cancer that is caused by the jaagsiekte sheep retrovirus. The disease has similar histological classification and oncogenic pathway activation to that of human lung adenocarcinomas making it a valuable model for studying human lung cancer. Developing OPA models to include techniques used in the treatment of human lung cancer would enhance its translational potential, making it an excellent research tool in assessing cancer therapeutics. In this study we developed a novel OPA model to validate the ability of miniaturized implantable O2 and pH sensors to monitor the tumor microenvironment. Naturally-occurring pre-clinical OPA cases were obtained through an on-farm ultrasound screening programme. Sensors were implanted into OPA tumors of anesthetized sheep using a CT-guided trans-thoracic percutaneous implantation procedure. This study reports the findings from 9 sheep that received sensor implantations. Time taken from initial CT scans to the placement of a single sensor into an OPA tumor was 45 ± 5 min, with all implantations resulting in the successful delivery of sensors into tumors. Immediate post-implantation mild pneumothoraces occurred in 4 sheep, which was successfully managed in all cases. This is, to the best of our knowledge, the first description of the use of naturally-occurring OPA cases as a pre-clinical surgical model. Through the integration of techniques used in the treatment of human lung cancer patients, including ultrasound, general anesthesia, CT and surgery into the OPA model, we have demonstrated its translational potential. Although our research was tailored specifically for the implantation of sensors into lung tumors, we believe the model could also be developed for other pre-clinical applications.
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Affiliation(s)
- Mark E Gray
- The Royal (Dick) School of Veterinary Studies and Roslin Institute, University of Edinburgh, Easter Bush, Edinburgh, United Kingdom.,Cancer Research UK Edinburgh Centre and Division of Pathology Laboratories, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom
| | - Paul Sullivan
- School of Engineering, Institute for Integrated Micro and Nano Systems, Edinburgh, United Kingdom
| | - Jamie R K Marland
- School of Engineering, Institute for Integrated Micro and Nano Systems, Edinburgh, United Kingdom
| | - Stephen N Greenhalgh
- The Royal (Dick) School of Veterinary Studies and Roslin Institute, University of Edinburgh, Easter Bush, Edinburgh, United Kingdom
| | - James Meehan
- Cancer Research UK Edinburgh Centre and Division of Pathology Laboratories, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom.,Institute of Sensors, Signals and Systems, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, United Kingdom
| | - Rachael Gregson
- The Royal (Dick) School of Veterinary Studies and Roslin Institute, University of Edinburgh, Easter Bush, Edinburgh, United Kingdom
| | - R Eddie Clutton
- The Royal (Dick) School of Veterinary Studies and Roslin Institute, University of Edinburgh, Easter Bush, Edinburgh, United Kingdom
| | - Chris Cousens
- Moredun Research Institute, Pentlands Science Park, Midlothian, United Kingdom
| | - David J Griffiths
- Moredun Research Institute, Pentlands Science Park, Midlothian, United Kingdom
| | - Alan Murray
- School of Engineering, Institute for Integrated Micro and Nano Systems, Edinburgh, United Kingdom
| | - David Argyle
- The Royal (Dick) School of Veterinary Studies and Roslin Institute, University of Edinburgh, Easter Bush, Edinburgh, United Kingdom
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15
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Thiebes AL, McGrath DJ, Kelly N, Sweeney CA, Kurtenbach K, Gesché VN, Clauser J, O'Brien B, Bruzzi M, McHugh PE, Jockenhoevel S, Cornelissen CG. Comparison of Covered Laser-cut and Braided Respiratory Stents: From Bench to Pre-Clinical Testing. Ann Biomed Eng 2019; 47:1738-1747. [PMID: 31044340 DOI: 10.1007/s10439-019-02278-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Accepted: 04/23/2019] [Indexed: 11/30/2022]
Abstract
Lung cancer patients often suffer from severe airway stenosis, the symptoms of which can be relieved by the implantation of stents. Different respiratory stents are commercially available, but the impact of their mechanical performance on tissue responses is not well understood. Two novel laser-cut and hand-braided nitinol stents, partially covered with polycarbonate urethane, were bench tested and implanted in Rhön sheep for 6 weeks. Bench testing highlighted differences in mechanical behavior: the laser-cut stent showed little foreshortening when crimped to a target diameter of 7.5 mm, whereas the braided stent elongated by more than 50%. Testing also revealed that the laser-cut stent generally exerted higher radial resistive and chronic outward forces than the braided stent, but the latter produced significantly higher radial resistive forces at diameters below 9 mm. No migration was observed for either stent type in vivo. In terms of granulation, most stents exerted a low to medium tissue response with only minimal formation of granulation tissue. We have developed a mechanical and in vivo framework to compare the behavior of different stent designs in a large animal model, providing data, which may be employed to improve current stent designs and to achieve better treatment options for lung cancer patients.
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Affiliation(s)
- Anja Lena Thiebes
- Department of Biohybrid & Medical Textiles (BioTex), AME - Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Forckenbeckstr. 55, 52074, Aachen, Germany
| | - Donnacha J McGrath
- Biomechanics Research Centre, Biomedical Engineering, College of Engineering and Informatics, National University of Ireland, University Road, Galway, Ireland
| | - Nicola Kelly
- Biomechanics Research Centre, Biomedical Engineering, College of Engineering and Informatics, National University of Ireland, University Road, Galway, Ireland
| | - Caoimhe A Sweeney
- Biomechanics Research Centre, Biomedical Engineering, College of Engineering and Informatics, National University of Ireland, University Road, Galway, Ireland
| | - Kathrin Kurtenbach
- Institute for Textile Engineering, RWTH Aachen University, Otto-Blumenthal-Str. 1, 52074, Aachen, Germany
| | - Valentine N Gesché
- Institute for Textile Engineering, RWTH Aachen University, Otto-Blumenthal-Str. 1, 52074, Aachen, Germany
| | - Johanna Clauser
- Department of Cardiovascular Engineering, Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Pauwelsstr. 20, 52074, Aachen, Germany
| | - Barry O'Brien
- Biomechanics Research Centre, Biomedical Engineering, College of Engineering and Informatics, National University of Ireland, University Road, Galway, Ireland
| | - Mark Bruzzi
- Biomechanics Research Centre, Biomedical Engineering, College of Engineering and Informatics, National University of Ireland, University Road, Galway, Ireland
| | - Peter E McHugh
- Biomechanics Research Centre, Biomedical Engineering, College of Engineering and Informatics, National University of Ireland, University Road, Galway, Ireland
| | - Stefan Jockenhoevel
- Department of Biohybrid & Medical Textiles (BioTex), AME - Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Forckenbeckstr. 55, 52074, Aachen, Germany.
| | - Christian G Cornelissen
- Department of Biohybrid & Medical Textiles (BioTex), AME - Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Forckenbeckstr. 55, 52074, Aachen, Germany.,Clinic for Pneumology and Internistic Intensive Medicine (Medical Clinic V), Medical Faculty, RWTH Aachen University, Pauwelsstr. 30, 52074, Aachen, Germany
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Gray ME, Meehan J, Sullivan P, Marland JRK, Greenhalgh SN, Gregson R, Clutton RE, Ward C, Cousens C, Griffiths DJ, Murray A, Argyle D. Ovine Pulmonary Adenocarcinoma: A Unique Model to Improve Lung Cancer Research. Front Oncol 2019; 9:335. [PMID: 31106157 PMCID: PMC6498990 DOI: 10.3389/fonc.2019.00335] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Accepted: 04/11/2019] [Indexed: 12/20/2022] Open
Abstract
Lung cancer represents a major worldwide health concern; although advances in patient management have improved outcomes for some patients, overall 5-year survival rates are only around 15%. In vitro studies and mouse models are commonly used to study lung cancer and their use has increased the molecular understanding of the disease. Unfortunately, mouse models are poor predictors of clinical outcome and seldom mimic advanced stages of the human disease. Animal models that more accurately reflect human disease are required for progress to be made in improving treatment outcomes and prognosis. Similarities in pulmonary anatomy and physiology potentially make sheep better models for studying human lung function and disease. Ovine pulmonary adenocarcinoma (OPA) is a naturally occurring lung cancer that is caused by the jaagsiekte sheep retrovirus. The disease is endemic in many countries throughout the world and has several features in common with human lung adenocarcinomas, including histological classification and activation of common cellular signaling pathways. Here we discuss the in vivo and in vitro OPA models that are currently available and describe the advantages of using pre-clinical naturally occurring OPA cases as a translational animal model for human lung adenocarcinoma. The challenges and options for obtaining these OPA cases for research purposes, along with their use in developing novel techniques for the evaluation of chemotherapeutic agents or for monitoring the tumor microenvironment in response to treatment, are also discussed.
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Affiliation(s)
- Mark E. Gray
- The Royal (Dick) School of Veterinary Studies and Roslin Institute, University of Edinburgh, Edinburgh, United Kingdom
- Cancer Research UK Edinburgh Centre and Division of Pathology Laboratories, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom
| | - James Meehan
- Cancer Research UK Edinburgh Centre and Division of Pathology Laboratories, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom
- School of Engineering and Physical Sciences, Institute of Sensors, Signals and Systems, Heriot-Watt University, Edinburgh, United Kingdom
| | - Paul Sullivan
- School of Engineering, Institute for Integrated Micro and Nano Systems, The King's Buildings, Edinburgh, United Kingdom
| | - Jamie R. K. Marland
- School of Engineering, Institute for Integrated Micro and Nano Systems, The King's Buildings, Edinburgh, United Kingdom
| | - Stephen N. Greenhalgh
- The Royal (Dick) School of Veterinary Studies and Roslin Institute, University of Edinburgh, Edinburgh, United Kingdom
| | - Rachael Gregson
- The Royal (Dick) School of Veterinary Studies and Roslin Institute, University of Edinburgh, Edinburgh, United Kingdom
| | - Richard Eddie Clutton
- The Royal (Dick) School of Veterinary Studies and Roslin Institute, University of Edinburgh, Edinburgh, United Kingdom
| | - Carol Ward
- Cancer Research UK Edinburgh Centre and Division of Pathology Laboratories, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom
| | - Chris Cousens
- Moredun Research Institute, Pentlands Science Park, Midlothian, United Kingdom
| | - David J. Griffiths
- Moredun Research Institute, Pentlands Science Park, Midlothian, United Kingdom
| | - Alan Murray
- School of Engineering, Institute for Integrated Micro and Nano Systems, The King's Buildings, Edinburgh, United Kingdom
| | - David Argyle
- The Royal (Dick) School of Veterinary Studies and Roslin Institute, University of Edinburgh, Edinburgh, United Kingdom
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Abstract
Cancer is ubiquitous in wildlife, affecting animals from bivalves to pachyderms and cetaceans. Reports of increasing frequency demonstrate that neoplasia is associated with substantial mortality in wildlife species. Anthropogenic activities and global weather changes are shaping new geographical limitations for many species, and alterations in living niches are associated with visible examples of genetic bottlenecks, toxin exposures, oncogenic pathogens, stress and immunosuppression, which can all contribute to cancers in wild species. Nations that devote resources to monitoring the health of wildlife often do so for human-centric reasons, including for the prediction of the potential for zoonotic disease, shared contaminants, chemicals and medications, and for observing the effect of exposure from crowding and loss of habitat. Given the increasing human footprint on land and in the sea, wildlife conservation should also become a more important motivating factor. Greater attention to the patterns of the emergence of wildlife cancer is imperative because growing numbers of species are existing at the interface between humans and the environment, making wildlife sentinels for both animal and human health. Therefore, monitoring wildlife cancers could offer interesting and novel insights into potentially unique non-age-related mechanisms of carcinogenesis across species.
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Affiliation(s)
- Patricia A Pesavento
- Department of Pathology, Microbiology, and Immunology, School of Veterinary Medicine, University of California, Davis, CA, USA.
| | - Dalen Agnew
- Veterinary Diagnostic Laboratory, Department of Pathobiology and Diagnostic Investigation, College of Veterinary Medicine, Michigan State University, East Lansing, MI, USA
| | - Michael K Keel
- Department of Pathology, Microbiology, and Immunology, School of Veterinary Medicine, University of California, Davis, CA, USA
| | - Kevin D Woolard
- Department of Pathology, Microbiology, and Immunology, School of Veterinary Medicine, University of California, Davis, CA, USA
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Jörger A, Acevedo C, Busley D, Ganter M, Schmiedl A, Humann-Ziehank E. Stereological and biophysical characteristics of the ovine surfactant system and its changes caused by ovine pulmonary adenocarcinoma. Res Vet Sci 2017. [DOI: 10.1016/j.rvsc.2017.06.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Role for a Zinc Finger Protein (Zfp111) in Transformation of 208F Rat Fibroblasts by Jaagsiekte Sheep Retrovirus Envelope Protein. J Virol 2015; 89:10453-66. [PMID: 26246563 DOI: 10.1128/jvi.01631-15] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Accepted: 07/29/2015] [Indexed: 01/15/2023] Open
Abstract
UNLABELLED The native envelope gene (env) of Jaagsiekte sheep retrovirus (JSRV) also acts as an oncogene. To investigate the mechanism of transformation, we performed yeast 2-hybrid screening for cellular proteins that interact with Env. Among several candidates, we identified mouse or rat zinc finger protein 111 (zfp111). The interaction between Env and Zfp111 was confirmed through in vivo coimmunoprecipitation assays. Knockdown of endogenous Zfp111 caused a decrease in cell transformation by JSRV Env, while overexpression of Zfp111 increased overall Env transformation, supporting a role for Zfp111 in Env transformation. Knockdown of Zfp111 had no effect on the growth rate of parental rat 208F cells, while it decreased the proliferation rate of JSRV-transformed 208F cells, suggesting that JSRV-transformed cells became dependent on Zfp111. In addition, Zfp111 preferentially bound to a higher-mobility form of JSRV Env that has not been described previously. The higher-mobility form of Env (P70(env)) was found exclusively in the nuclear fraction, and size of its polypeptide backbone was the same as that of the cytoplasmic Env polyprotein (Pr80(env)). The differences in glycosylation between the two versions of Env were characterized. These results identify a novel cellular protein, Zfp111, that binds to the JSRV Env protein, and this binding plays a role in Env transformation. These results indicate that JSRV transformation also involves proteins and interactions in the nucleus. IMPORTANCE The envelope protein (Env) of Jaagsiekte sheep retrovirus (JSRV) is an oncogene, but its mechanism of cell transformation is still unclear. Here we identified seven candidate cellular proteins that can interact with JSRV Env by yeast two-hybrid screening. This study focused on one of the seven candidates, zinc finger protein 111 (Zfp111). Zfp111 was shown to interact with JSRV Env in cells and to be involved in JSRV transformation. Moreover, coexpression of JSRV Env and Zfp111 led to the identification of a novel nuclear form of the JSRV Env protein that binds Zfp111. Nuclear Env was found to differ by glycosylation from the cytoplasmic Env precursor to the virion envelope proteins. These results suggest that JSRV Env transformation may involve nuclear events such as an alteration in transcription mediated by Env-Zfp111 interactions.
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