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Hedman C, Bolea R, Marín B, Cobrière F, Filali H, Vazquez F, Pitarch JL, Vargas A, Acín C, Moreno B, Pumarola M, Andreoletti O, Badiola JJ. Transmission of sheep-bovine spongiform encephalopathy to pigs. Vet Res 2016; 47:14. [PMID: 26742788 PMCID: PMC4705642 DOI: 10.1186/s13567-015-0295-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Accepted: 09/21/2015] [Indexed: 11/16/2022] Open
Abstract
Experimental transmission of the bovine spongiform encephalopathy (BSE) agent has been successfully reported in pigs inoculated via three simultaneous distinct routes (intracerebral, intraperitoneal and intravenous). Sheep derived BSE (Sh-BSE) is transmitted more efficiently than the original cattle-BSE isolate in a transgenic mouse model expressing porcine prion protein. However, the neuropathology and distribution of Sh-BSE in pigs as natural hosts, and susceptibility to this agent, is unknown. In the present study, seven pigs were intracerebrally inoculated with Sh-BSE prions. One pig was euthanized for analysis in the preclinical disease stage. The remaining six pigs developed neurological signs and histopathology revealed severe spongiform changes accompanied by astrogliosis and microgliosis throughout the central nervous system. Intracellular and neuropil-associated pathological prion protein (PrPSc) deposition was consistently observed in different brain sections and corroborated by Western blot. PrPSc was detected by immunohistochemistry and enzyme immunoassay in the following tissues in at least one animal: lymphoid tissues, peripheral nerves, gastrointestinal tract, skeletal muscle, adrenal gland and pancreas. PrPSc deposition was revealed by immunohistochemistry alone in the retina, optic nerve and kidney. These results demonstrate the efficient transmission of Sh-BSE in pigs and show for the first time that in this species propagation of bovine PrPSc in a wide range of peripheral tissues is possible. These results provide important insight into the distribution and detection of prions in non-ruminant animals.
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Affiliation(s)
- Carlos Hedman
- Veterinary Faculty, Centro de Investigación en Encefalopatías y Enfermedades Transmisibles Emergentes (CIEETE), Universidad de Zaragoza, 50013, Zaragoza, Spain.
| | - Rosa Bolea
- Veterinary Faculty, Centro de Investigación en Encefalopatías y Enfermedades Transmisibles Emergentes (CIEETE), Universidad de Zaragoza, 50013, Zaragoza, Spain.
| | - Belén Marín
- Veterinary Faculty, Centro de Investigación en Encefalopatías y Enfermedades Transmisibles Emergentes (CIEETE), Universidad de Zaragoza, 50013, Zaragoza, Spain.
| | - Fabien Cobrière
- UMR INRA ENVT 1225, Interactions Hôtes Agents Pathogènes, Ecole Nationale Vétérinaire de Toulouse, 31076, Toulouse, France.
| | - Hicham Filali
- Veterinary Faculty, Centro de Investigación en Encefalopatías y Enfermedades Transmisibles Emergentes (CIEETE), Universidad de Zaragoza, 50013, Zaragoza, Spain.
| | - Francisco Vazquez
- Veterinary Hospital, Universidad de Zaragoza, 50013, Zaragoza, Spain.
| | - José Luis Pitarch
- Veterinary Faculty, Centro de Investigación en Encefalopatías y Enfermedades Transmisibles Emergentes (CIEETE), Universidad de Zaragoza, 50013, Zaragoza, Spain.
| | - Antonia Vargas
- Veterinary Faculty, Centro de Investigación en Encefalopatías y Enfermedades Transmisibles Emergentes (CIEETE), Universidad de Zaragoza, 50013, Zaragoza, Spain.
| | - Cristina Acín
- Veterinary Faculty, Centro de Investigación en Encefalopatías y Enfermedades Transmisibles Emergentes (CIEETE), Universidad de Zaragoza, 50013, Zaragoza, Spain.
| | - Bernardino Moreno
- Veterinary Faculty, Centro de Investigación en Encefalopatías y Enfermedades Transmisibles Emergentes (CIEETE), Universidad de Zaragoza, 50013, Zaragoza, Spain.
| | - Martí Pumarola
- Veterinary Faculty, Department of Animal Medicine and Surgery, Universitat Autònoma de Barcelona, 08193, Barcelona, Spain.
| | - Olivier Andreoletti
- UMR INRA ENVT 1225, Interactions Hôtes Agents Pathogènes, Ecole Nationale Vétérinaire de Toulouse, 31076, Toulouse, France.
| | - Juan José Badiola
- Veterinary Faculty, Centro de Investigación en Encefalopatías y Enfermedades Transmisibles Emergentes (CIEETE), Universidad de Zaragoza, 50013, Zaragoza, Spain.
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Early and persistent expression of phosphorylated α-synuclein in the enteric nervous system of A53T mutant human α-synuclein transgenic mice. J Neuropathol Exp Neurol 2015; 73:1144-51. [PMID: 25383638 DOI: 10.1097/nen.0000000000000137] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Alpha-synuclein is a key protein in Parkinson disease (PD) and dementia with Lewy bodies. It is found in Lewy bodies in the brains of PD patients and has been reported in the peripheral nervous system in postmortem tissues from PD patients and in biopsies from patients in the preclinical phase of PD. Here, we used a transgenic mouse model of human synucleinopathies expressing the A53T mutant α-synuclein (TgM83) in which a neurodegenerative process associated with α-synuclein occurs spontaneously and increases with age. In particular, α-synuclein protein phosphorylated at serine 129 (pSer129 α-synuclein) naturally and progressively increases in diseased brains. We examined the time course of pSer129 α-synuclein presence in the gut of these mice between 1.5 and 22 months of age using immunohistochemistry and paraffin-embedded tissue blots. The pSer129 α-synuclein accumulated early (before the onset of motor signs) and persistently in the enteric nervous system and was concomitantly found in the brain. These results suggest that the accumulation of phosphorylated α-synuclein in the enteric and central nervous systems may result from parallel pathologic processes when the disease is linked to a mutation of α-synuclein.
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Garza MC, Monzón M, Marín B, Badiola JJ, Monleón E. Distribution of peripheral PrP(Sc) in sheep with naturally acquired scrapie. PLoS One 2014; 9:e97768. [PMID: 24828439 PMCID: PMC4020850 DOI: 10.1371/journal.pone.0097768] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2014] [Accepted: 04/22/2014] [Indexed: 12/21/2022] Open
Abstract
Accumulation of prion protein (PrPSc) in the central nervous system is the hallmark of transmissible spongiform encephalopathies. However, in some of these diseases such as scrapie or chronic wasting disease, the PrPSc can also accumulate in other tissues, particularly in the lymphoreticular system. In recent years, PrPSc in organs other than nervous and lymphoid have been described, suggesting that distribution of this protein in affected individuals may be much larger than previously thought. In the present study, 11 non-nervous/non-lymphoid organs from 16 naturally scrapie infected sheep in advanced stages of the disease were examined for the presence of PrPSc. Fourteen infected sheep were of the ARQ/ARQ PRNP genotype and 2 of the VRQ/VRQ, where the letters A, R, Q, and V represent the codes for amino-acids alanine, arginine, glutamine and valine, respectively. Adrenal gland, pancreas, heart, skin, urinary bladder and mammary gland were positive for PrPSc by immunohistochemistry and IDEXX HerdChek scrapie/BSE Antigen EIA Test in at least one animal. Lung, liver, kidney and skeletal muscle exhibited PrPSc deposits by immunohistochemistry only. To our knowledge, this is the first report regarding the presence of PrPSc in the heart, pancreas and urinary bladder in naturally acquired scrapie infections. In some other organs examined, in which PrPSc had been previously detected, PrPSc immunolabeling was observed to be associated with new structures within those organs. The results of the present study illustrate a wide dissemination of PrPSc in both ARQ/ARQ and VRQ/VRQ infected sheep, even when the involvement of the lymphoreticular system is scarce or absent, thus highlighting the role of the peripheral nervous system in the spread of PrPSc.
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Affiliation(s)
- María Carmen Garza
- Centro de Encefalopatías Espongiformes y Enfermedades Emergentes, Universidad de Zaragoza, Zaragoza, Spain
- Centre for Prions and Protein Folding Diseases, University of Alberta, Alberta, Canada
| | - Marta Monzón
- Centro de Encefalopatías Espongiformes y Enfermedades Emergentes, Universidad de Zaragoza, Zaragoza, Spain
| | - Belén Marín
- Centro de Encefalopatías Espongiformes y Enfermedades Emergentes, Universidad de Zaragoza, Zaragoza, Spain
| | - Juan José Badiola
- Centro de Encefalopatías Espongiformes y Enfermedades Emergentes, Universidad de Zaragoza, Zaragoza, Spain
| | - Eva Monleón
- Centro de Encefalopatías Espongiformes y Enfermedades Emergentes, Universidad de Zaragoza, Zaragoza, Spain
- Departamento de Anatomía e Histología Humanas, Universidad de Zaragoza, Zaragoza, Spain
- * E-mail:
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