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Zeineldin M, Cox-Struble H, Camp P, Farrell D, Pritchard R, Thacker TC, Lehman K. National Prevalence of Caprine Prion Protein Genetic Variability at Codons 146, 211, and 222 in Goat Herds in the United States. Vet Sci 2023; 11:13. [PMID: 38250919 PMCID: PMC10818752 DOI: 10.3390/vetsci11010013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 12/18/2023] [Accepted: 12/23/2023] [Indexed: 01/23/2024] Open
Abstract
Scrapie is a neurodegenerative disease that impacts sheep and goats, characterized by gradual and progressive changes in neurological function. Recent research shows that the scrapie incubation period is significantly influenced by specific variations in amino acids within the prion protein gene (PRNP). The objective of this study was to estimate the national prevalence of caprine PRNP genetic variability at codons 146, 211, and 222 in goat populations across the United States. A total of 3052 blood, ear tissue, and brain tissue samples were collected from goats from 50 states. The participating states were categorized into four Veterinary Service (VS) district regions. The samples underwent DNA extraction, and the PRNP variants corresponding to codons 146, 211, and 222 were amplified and sequenced. The analysis of PRNP variants, when compared to the PRNP reference sequence, revealed seven alleles in twelve genotypes. The homozygous 146NN, 211RR, and 222QQ alleles, which have been linked to an increased risk of scrapie, were found to be the most prevalent among all the goats. The heterozygous 222QK, 211RQ, 146SD, 146ND, and 146NS alleles and the homozygous 222KK, 146SS, and 146DD alleles, known to be associated with reduced scrapie susceptibility and a prolonged incubation period after experimental challenge, were found in 1.098% (222QK), 2.33% (211RQ), 0.58% (146SD), 3.13% (146ND), 20.68% (146NS), 0.005% (222KK), 3.31% (146SS), and 0.67% (146DD) of goats, respectively. The 222QK allele was found most frequently in goats tested from the east (VS District 1, 1.59%) and southwest (VS District 4, 1.08%) regions, whereas the 211RQ allele was found most often in goats tested from the Midwest (VS District 2, 8.03%) and east (VS District 1, 6.53%) regions. The 146NS allele was found most frequently in goats tested from the northwest (VS District 3, 29.02%) and southwest (VS District 4, 20.69%) regions. Our results showed that the prevalence of less susceptible genotypes at PRNP codon 146 may be sufficient to use genetic susceptibility testing in some herds. This may reduce the number of goats removed as part of a herd clean-up plan and may promote the selective breeding goats for less susceptible alleles in high-risk herds at the national level.
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Affiliation(s)
- Mohamed Zeineldin
- National Veterinary Services Laboratories, Veterinary Services, Animal and Plant Health Inspection Service, United States Department of Agriculture, Ames, IA 50010, USA; (H.C.-S.); (P.C.); (D.F.)
- Department of Animal Medicine, College of Veterinary Medicine, Benha University, Benha 13511, Egypt
| | - Heather Cox-Struble
- National Veterinary Services Laboratories, Veterinary Services, Animal and Plant Health Inspection Service, United States Department of Agriculture, Ames, IA 50010, USA; (H.C.-S.); (P.C.); (D.F.)
| | - Patrick Camp
- National Veterinary Services Laboratories, Veterinary Services, Animal and Plant Health Inspection Service, United States Department of Agriculture, Ames, IA 50010, USA; (H.C.-S.); (P.C.); (D.F.)
| | - David Farrell
- National Veterinary Services Laboratories, Veterinary Services, Animal and Plant Health Inspection Service, United States Department of Agriculture, Ames, IA 50010, USA; (H.C.-S.); (P.C.); (D.F.)
| | - Randy Pritchard
- Strategy and Policy, Veterinary Services, Animal and Plant Health Inspection Service, United States Department of Agriculture, Fort Collins, CO 80521, USA
| | - Tyler C. Thacker
- National Veterinary Services Laboratories, Veterinary Services, Animal and Plant Health Inspection Service, United States Department of Agriculture, Ames, IA 50010, USA; (H.C.-S.); (P.C.); (D.F.)
| | - Kimberly Lehman
- National Veterinary Services Laboratories, Veterinary Services, Animal and Plant Health Inspection Service, United States Department of Agriculture, Ames, IA 50010, USA; (H.C.-S.); (P.C.); (D.F.)
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Gurau MR, Negru E, Ionescu T, Udriste AA, Cornea CP, Baraitareanu S. Genetic Polymorphism at 15 Codons of the Prion Protein Gene in 156 Goats from Romania. Genes (Basel) 2022; 13:genes13081316. [PMID: 35893054 PMCID: PMC9394368 DOI: 10.3390/genes13081316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Revised: 07/20/2022] [Accepted: 07/21/2022] [Indexed: 02/04/2023] Open
Abstract
Background: The variability of prion protein gene (PRNP) codons and the frequency of alleles (K222, D146, and S146) that appear to confer genetic resistance to classical scrapie are still unknown in several goat populations/breeds prevalent in Romania. This work aims to assess the genetic polymorphism at 15 PRNP codons in Romanian goat populations to inform the development of goat breeding programs for scrapie resistance. Methods: Whole blood and hair follicles from Carpathian (50), French Alpine (53), and Banat’s White (53) breed goats were sampled to extract genomic DNA for genetic analyses and Sanger sequencing. In the targeted goat groups, one classical scrapie-positive Banat’s White goat was included. Results: The codons without polymorphisms were G37G, W102W, N146N, R151R, S173S, and I218I. The following non-synonymous polymorphisms of PRNP were recorded: P110P, P110S, P110T, T110T, G127G, G127S, I142I, I142M, T142I, H143H, P143P, R143R, R154R, H154R, P168P, Q168Q, Q211Q, Q211R, Q222Q, H222Q, K222K, S240S, P240P, P240S, and S240P. Conclusions: PRNP polymorphism was recorded in 60% (9/15) of codons. The scrapie-positive Banat’s White goat had G37G, W102W, T110T, G127G, I142I, H143H, N146N, R151R, R154R, P168P, S173S, R211R, I218I, Q222Q, and S240S. The K222 allele had a frequency of 6% (3/50) in Carpathian, 9.43% (5/53) in Banat’s White, and 15.09% (8/53) in French Alpine. Therefore, the polymorphisms detected in this sample of Romanian goat breeds are too rare to design a breeding program at the current time.
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Affiliation(s)
- Maria Rodica Gurau
- Department of Clinical Sciences, Faculty of Veterinary Medicine, University of Agronomic Sciences and Veterinary Medicine of Bucharest, 105 Splaiul Independentei, District 5, 050097 Bucharest, Romania; (M.R.G.); (E.N.); (T.I.)
| | - Elena Negru
- Department of Clinical Sciences, Faculty of Veterinary Medicine, University of Agronomic Sciences and Veterinary Medicine of Bucharest, 105 Splaiul Independentei, District 5, 050097 Bucharest, Romania; (M.R.G.); (E.N.); (T.I.)
| | - Teodor Ionescu
- Department of Clinical Sciences, Faculty of Veterinary Medicine, University of Agronomic Sciences and Veterinary Medicine of Bucharest, 105 Splaiul Independentei, District 5, 050097 Bucharest, Romania; (M.R.G.); (E.N.); (T.I.)
| | - Anca Amalia Udriste
- Laboratory of Molecular Plant Physiology, Research Center for Studies of Food Quality and Agricultural Products, University of Agronomic Sciences and Veterinary Medicine of Bucharest, 59 Marasti Blvd, District 1, 011464 Bucharest, Romania;
| | - Călina Petruța Cornea
- Faculty of Biotechnologies, University of Agronomic Sciences and Veterinary Medicine of Bucharest, 59 Marasti Blvd, District 1, 011464 Bucharest, Romania;
| | - Stelian Baraitareanu
- Department of Clinical Sciences, Faculty of Veterinary Medicine, University of Agronomic Sciences and Veterinary Medicine of Bucharest, 105 Splaiul Independentei, District 5, 050097 Bucharest, Romania; (M.R.G.); (E.N.); (T.I.)
- Correspondence:
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Gelasakis AI, Boukouvala E, Babetsa M, Katharopoulos E, Palaska V, Papakostaki D, Giadinis ND, Loukovitis D, Langeveld JPM, Ekateriniadou LV. Polymorphisms of Codons 110, 146, 211 and 222 at the Goat PRNP Locus and Their Association with Scrapie in Greece. Animals (Basel) 2021; 11:ani11082340. [PMID: 34438796 PMCID: PMC8388637 DOI: 10.3390/ani11082340] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 08/03/2021] [Accepted: 08/05/2021] [Indexed: 12/27/2022] Open
Abstract
Scrapie is considered an endemic disease in both sheep and goats in Greece. However, contrary to sheep, in goats more than one prion protein (PrP) polymorphism has been recognized as a candidate for resistance breeding against the disease. For an impression, candidates which are circulating, (i) brain samples (n = 525) from scrapie-affected (n = 282) and non-affected (n = 243) animals within the national surveillance program, and (ii) individual blood samples (n = 1708) from affected (n = 241) and non-affected (n = 1467) herds, in a large part of mainland Greece and its islands, were collected and assayed. A dedicated Taqman method was used to test for amino acid polymorphisms 110T/P, 146N/S/D, 211R/Q, and 222Q/K. Highly prevalent genotypes were 110TT, 146NN, 211RR, and 222QQ. The frequencies of polymorphisms in blood and negative brain samples for codons 110P, 211Q, and 222K were 4.0%, 3.0%, and 1.9%, respectively, while 146D (0.7%) was present only on Karpathos island. Codon 110P was exclusively found in scrapie-negative brains, and homozygous 110P/P in two scrapie-negative goats. It is concluded that breeding programs in Karpathos could focus on codon 146D, while in other regions carriers of the 110P and 222K allele should be sought. Case-control and challenge studies are now necessary to elucidate the most efficient breeding strategies.
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Affiliation(s)
- Athanasios I. Gelasakis
- Department of Animal Science, School of Animal Biosciences, Agricultural University of Athens, 11855 Athens, Greece;
| | - Evridiki Boukouvala
- Veterinary Research Institute, ELGO-DIMITRA, 54124 Thessaloniki, Greece; (E.B.); (M.B.); (E.K.)
| | - Maria Babetsa
- Veterinary Research Institute, ELGO-DIMITRA, 54124 Thessaloniki, Greece; (E.B.); (M.B.); (E.K.)
| | | | - Vayia Palaska
- National Reference Laboratory for TSEs, Ministry of Agricultural Development and Food, 41110 Larissa, Greece;
| | - Dimitra Papakostaki
- Veterinary Center of Thessaloniki, Ministry of Agricultural Development and Food, 54627 Thessaloniki, Greece;
| | - Nektarios D. Giadinis
- School of Veterinary Medicine, Aristotle University of Thessaloniki, 54627 Thessaloniki, Greece;
| | | | - Jan P. M. Langeveld
- Department of Infection Biology, Wageningen Bioveterinary Research (WBVR), 8221 RA Lelystad, The Netherlands;
| | - Loukia V. Ekateriniadou
- Veterinary Research Institute, ELGO-DIMITRA, 54124 Thessaloniki, Greece; (E.B.); (M.B.); (E.K.)
- Correspondence:
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Zeineldin M, Lehman K, Urie N, Branan M, Wiedenheft A, Marshall K, Robbe-Austerman S, Thacker T. Large-scale survey of prion protein genetic variability in scrapie disease-free goats from the United States. PLoS One 2021; 16:e0254998. [PMID: 34280230 PMCID: PMC8289333 DOI: 10.1371/journal.pone.0254998] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Accepted: 07/08/2021] [Indexed: 11/19/2022] Open
Abstract
Scrapie is a slowly progressive neurodegenerative disease of small ruminants caused by an accumulation of an abnormal isoform of prion protein in the central nervous system. Polymorphisms of the prion protein gene (PRNP) strongly modulate scrapie resistance and incubation period in goats. The aim of this study was to identify PRNP genetic variability in goats across the United States. Blood from a total of 6,029 apparent scrapie disease-free goats from 654 operations and 19 breeds were analyzed. Sequencing of PRNP revealed 26 genotypes with different rates based on eight codons. The GG127, RR154, and QQ222 genotypes were predominant and showed a remarkably high rate across all goats. The QK222 and NS146 genotypes, known to be protective against scrapie, were found in 0.6% [with 95% CI = (0.3, 1.2)] and 22.0% [95% CI = (19.1, 25.2)] of goats, respectively. The QK222 genotype was found in 23.1% of Oberhasli goats tested, with 95%CI = (3.9, 68.7)] and 22.0% of Toggenburg goats tested with 95%CI = (9.7, 42.5)], while NS146 was found in 65.5% of Savannah goats tested, with 95%CI = (30.8, 89.9), 36.7% of Boer goats tested, with 95%CI = (33.1, 40.4), 36.3% of Nubian goats tested, with 95%CI = (27.0, 46.7)], and 35.6% of LaMancha goats tested, with 95%CI = (22.8, 50.8%). The MM142 and IM142 genotypes were found more frequently in goats on dairy operations, while the HR143, NS146, and ND146 genotypes were found more frequently in goats on meat operations. Goats in the east region had a higher percentage of goats with RH154, RQ211, and QK222 genotypes than goats in the west region. The results of this study showed high genetic variability of PRNP among the U.S. goat population, with differences by location and breed, and may serve as a rationale for development of goat breeding programs at the national level to mitigate the risk of scrapie.
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Affiliation(s)
- Mohamed Zeineldin
- National Veterinary Services Laboratories, Veterinary Services, Animal and Plant Health Inspection Service, United States Department of Agriculture, Ames, IA, United States of America
- Department of Animal Medicine, College of Veterinary Medicine, Benha University, Benha, Egypt
| | - Kimberly Lehman
- National Veterinary Services Laboratories, Veterinary Services, Animal and Plant Health Inspection Service, United States Department of Agriculture, Ames, IA, United States of America
| | - Natalie Urie
- National Animal Health Monitoring System, Veterinary Services, Animal and Plant Health Inspection Service, United States Department of Agriculture, Fort Collins, CO, United States of America
- Department of Clinical Sciences, Colorado State University, Fort Collins, CO, United States of America
| | - Matthew Branan
- National Animal Health Monitoring System, Veterinary Services, Animal and Plant Health Inspection Service, United States Department of Agriculture, Fort Collins, CO, United States of America
| | - Alyson Wiedenheft
- National Animal Health Monitoring System, Veterinary Services, Animal and Plant Health Inspection Service, United States Department of Agriculture, Fort Collins, CO, United States of America
- Department of Clinical Sciences, Colorado State University, Fort Collins, CO, United States of America
| | - Katherine Marshall
- National Animal Health Monitoring System, Veterinary Services, Animal and Plant Health Inspection Service, United States Department of Agriculture, Fort Collins, CO, United States of America
| | - Suelee Robbe-Austerman
- National Veterinary Services Laboratories, Veterinary Services, Animal and Plant Health Inspection Service, United States Department of Agriculture, Ames, IA, United States of America
| | - Tyler Thacker
- National Veterinary Services Laboratories, Veterinary Services, Animal and Plant Health Inspection Service, United States Department of Agriculture, Ames, IA, United States of America
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Won SY, Kim YC, Jeong BH. Evaluation of proteinase K-resistant prion protein (PrPres) in Korean native black goats carrying a potential scrapie-susceptible haplotype of the prion protein gene (PRNP). Acta Vet Hung 2021; 69:88-93. [PMID: 33844641 DOI: 10.1556/004.2021.00009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Accepted: 03/08/2021] [Indexed: 11/19/2022]
Abstract
Prion disease is a fatal neurodegenerative disease with a broad host range in humans and animals. It is caused by proteinase K-resistant prion protein (PrPres). In previous studies, a heterogeneous infection in Cervidae and Caprinae was reported. Chronic wasting disease (CWD) has been frequently reported as the only prion disease in Korea that occurs in livestock. Thus, there is a possibility of transmission of CWD to Korean native black goats. However, PrPres has not been investigated thus far in Korean native black goats. We found strong linkage disequilibrium between c.126G>A and c.414T>C (r2 = 1) and between c.718C>T and c.126G>A (r2 = 0.638). In addition, the haplotype GTGTAAAC (representing codons 42, 102, 127, 138, 143, 146, 218 and 240) showed the highest frequency with 45.1%. Among 41 Korean native black goats, 20 animals (48.78%) were homozygous for the susceptible haplotypes (histidine at codon 143, asparagine at codon 146 and arginine at codon 154). Interestingly, we did not detect PrPres bands in any of the tested animals, including the 20 animals carrying potential scrapie susceptible haplotypes.
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Affiliation(s)
- Sae-Young Won
- 1Korea Zoonosis Research Institute, Jeonbuk National University, 820-120 Hana-ro, Iksan, Jeonbuk 54531, Republic of Korea
- 2Department of Bioactive Material Sciences, Institute for Molecular Biology and Genetics, Jeonbuk National University, Jeonju, Jeonbuk, Republic of Korea
| | - Yong-Chan Kim
- 1Korea Zoonosis Research Institute, Jeonbuk National University, 820-120 Hana-ro, Iksan, Jeonbuk 54531, Republic of Korea
- 2Department of Bioactive Material Sciences, Institute for Molecular Biology and Genetics, Jeonbuk National University, Jeonju, Jeonbuk, Republic of Korea
| | - Byung-Hoon Jeong
- 1Korea Zoonosis Research Institute, Jeonbuk National University, 820-120 Hana-ro, Iksan, Jeonbuk 54531, Republic of Korea
- 2Department of Bioactive Material Sciences, Institute for Molecular Biology and Genetics, Jeonbuk National University, Jeonju, Jeonbuk, Republic of Korea
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Torricelli M, Sebastiani C, Ciullo M, Ceccobelli S, Chiappini B, Vaccari G, Capocefalo A, Conte M, Giovannini S, Lasagna E, Sarti FM, Biagetti M. PRNP Polymorphisms in Eight Local Goat Populations/Breeds from Central and Southern Italy. Animals (Basel) 2021; 11:ani11020333. [PMID: 33525718 PMCID: PMC7911694 DOI: 10.3390/ani11020333] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 01/22/2021] [Accepted: 01/25/2021] [Indexed: 02/08/2023] Open
Abstract
In goats, as in sheep, genotypes of the prion protein gene (PRNP) can influence animals' susceptibility to scrapie. Since the polymorphic codons in sheep are well known, a genetic selection plan has been implemented in Europe, in order to reduce the prevalence of susceptible genotypes to scrapie. In Italy, no breeding plan for scrapie resistance in goats has been adopted, yet. Likewise, according to the most recent modification of Regulation EU 999/2001 (Regulation EU 772/2020) of the European Commission (EU), based on all the available experimental and in field data, K222, D146 and S146 polymorphisms could be used as scrapie resistance alleles in genetic management both in scrapie outbreaks and in disease prevention. In order to collect data on the variability of PRNP, the present study aimed to analyze the sequence of the PRNP gene in eight Italian local goat populations/breeds reared in central and southern Italy (Bianca Monticellana, Capestrina, Facciuta della Valnerina, Fulva del Lazio, Garganica, Grigia Ciociara, Grigia Molisana, and Teramana), some of which were investigated for the first time; moreover, two cosmopolitan breeds (Alpine and Saanen) were included. Blood samples were collected from 219 goats. Genomic DNA was extracted from whole blood. DNA was used as template in PCR amplification of the entire PRNP open reading frame (ORF). Purified amplicons have been sequenced and aligned to Capra hircus PRNP. Particularly, the alleles carrying the resistance-related 222 K polymorphism occurred in all populations with a frequency between 2.5% and 12.5%. An additional resistance allele carrying the S146 variant was observed with a frequency of 3.7% only in the Alpine breed. For three of the estimated alleles, we could not establish if the found double polymorphisms in heterozygosis were in phase, due to technical limitations. In this context, in addition to selective culling in scrapie outbreaks according to the European regulation in force, in the future, selection plans could be adopted to deal with scrapie and to control its diffusion, meanwhile paying attention to preserve a high variability of PRNP.
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Affiliation(s)
- Martina Torricelli
- Istituto Zooprofilattico Sperimentale dell’Umbria e delle Marche-Togo Rosati (IZSUM), Via Salvemini 1, 06126 Perugia, Italy; (M.T.); (C.S.); (M.C.)
| | - Carla Sebastiani
- Istituto Zooprofilattico Sperimentale dell’Umbria e delle Marche-Togo Rosati (IZSUM), Via Salvemini 1, 06126 Perugia, Italy; (M.T.); (C.S.); (M.C.)
| | - Marcella Ciullo
- Istituto Zooprofilattico Sperimentale dell’Umbria e delle Marche-Togo Rosati (IZSUM), Via Salvemini 1, 06126 Perugia, Italy; (M.T.); (C.S.); (M.C.)
| | - Simone Ceccobelli
- Dipartimento di Scienze Agrarie, Alimentari e Ambientali, Università Politecnica delle Marche, 60131 Ancona, Italy;
| | - Barbara Chiappini
- Dipartimento di Sicurezza Alimentare, Nutrizione e Sanità Pubblica Veterinaria, Istituto Superiore di Sanità, 00161 Rome, Italy; (B.C.); (G.V.); (A.C.); (M.C.)
| | - Gabriele Vaccari
- Dipartimento di Sicurezza Alimentare, Nutrizione e Sanità Pubblica Veterinaria, Istituto Superiore di Sanità, 00161 Rome, Italy; (B.C.); (G.V.); (A.C.); (M.C.)
| | - Antonio Capocefalo
- Dipartimento di Sicurezza Alimentare, Nutrizione e Sanità Pubblica Veterinaria, Istituto Superiore di Sanità, 00161 Rome, Italy; (B.C.); (G.V.); (A.C.); (M.C.)
| | - Michela Conte
- Dipartimento di Sicurezza Alimentare, Nutrizione e Sanità Pubblica Veterinaria, Istituto Superiore di Sanità, 00161 Rome, Italy; (B.C.); (G.V.); (A.C.); (M.C.)
| | - Samira Giovannini
- Dipartimento di Scienze Agrarie, Alimentari e Ambientali, University of Perugia, 06121 Perugia, Italy; (S.G.); (E.L.); (F.M.S.)
| | - Emiliano Lasagna
- Dipartimento di Scienze Agrarie, Alimentari e Ambientali, University of Perugia, 06121 Perugia, Italy; (S.G.); (E.L.); (F.M.S.)
| | - Francesca Maria Sarti
- Dipartimento di Scienze Agrarie, Alimentari e Ambientali, University of Perugia, 06121 Perugia, Italy; (S.G.); (E.L.); (F.M.S.)
| | - Massimo Biagetti
- Istituto Zooprofilattico Sperimentale dell’Umbria e delle Marche-Togo Rosati (IZSUM), Via Salvemini 1, 06126 Perugia, Italy; (M.T.); (C.S.); (M.C.)
- Correspondence:
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Konold T, Libbey S, Rajanayagam B, Fothergill L, Spiropoulos J, Vidaña B, Alarcon P. Classical Scrapie Did Not Re-occur in Goats After Cleaning and Disinfection of the Farm Premises. Front Vet Sci 2020; 7:585. [PMID: 32984416 PMCID: PMC7492743 DOI: 10.3389/fvets.2020.00585] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Accepted: 07/21/2020] [Indexed: 11/13/2022] Open
Abstract
After an outbreak of classical scrapie in a dairy goat herd with over 1,800 goats, all goats in the herd were culled in 2008, cleaning and disinfection of the premises was implemented, and restocking with goats took place ~4 months after depopulation. Ten years later the new herd population is over 3,000 goats. This study was carried out to determine whether the measures were effective to prevent re-occurrence of scrapie to the 1% prevalence level seen when scrapie was first detected on this farm. A total of 280 goats with a minimum age of 18 months, which were predominantly at the end of their productive life, were euthanized, and brain and retropharyngeal lymph node examined by immunohistochemistry for disease-associated prion protein. Genotyping was done in all euthanized goats and live male goats used or intended for breeding to determine prion protein gene polymorphisms associated with resistance to classical scrapie. None of the goats presented with disease-associated prion protein in the examined tissues, and 34 (12.2%) carried the K222 allele associated with resistance. This allele was also found in four breeding male goats. The study results suggested that classical scrapie was not re-introduced on this goat farm through mass restocking or inadequate cleaning and disinfection procedures. Further scrapie surveillance of goats on this farm is desirable to confirm absence of disease. Breeding with male goats carrying the K222 allele should be encouraged to increase the scrapie-resistant population.
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Affiliation(s)
- Timm Konold
- Pathology Department, Animal and Plant Health Agency Weybridge, Addlestone, United Kingdom
| | - Sonja Libbey
- Animal and Plant Health England Field Delivery, Dorchester, United Kingdom
| | - Brenda Rajanayagam
- Department of Epidemiological Sciences, Animal and Plant Health Agency Weybridge, Addlestone, United Kingdom
| | - Louise Fothergill
- Genotyping Unit, Animal and Plant Health Agency Weybridge, Addlestone, United Kingdom
| | - John Spiropoulos
- Pathology Department, Animal and Plant Health Agency Weybridge, Addlestone, United Kingdom
| | - Beatriz Vidaña
- Faculty of Health Sciences, Bristol Veterinary School, University of Bristol, Langford, United Kingdom
| | - Pablo Alarcon
- Department of Pathobiology and Population Sciences, Royal Veterinary College, University of London, Hatfield, United Kingdom
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Haley NJ, Merrett K, Buros Stein A, Simpson D, Carlson A, Mitchell G, Staskevicius A, Nichols T, Lehmkuhl AD, Thomsen BV. Estimating relative CWD susceptibility and disease progression in farmed white-tailed deer with rare PRNP alleles. PLoS One 2019; 14:e0224342. [PMID: 31790424 PMCID: PMC6886763 DOI: 10.1371/journal.pone.0224342] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Accepted: 11/14/2019] [Indexed: 12/20/2022] Open
Abstract
Chronic wasting disease is a prion disease affecting both free-ranging and farmed cervids in North America and Scandinavia. A range of cervid species have been found to be susceptible, each with variations in the gene for the normal prion protein, PRNP, reportedly influencing both disease susceptibility and progression in the respective hosts. Despite the finding of several different PRNP alleles in white-tailed deer, the majority of past research has focused on two of the more common alleles identified-the 96G and 96S alleles. In the present study, we evaluate both infection status and disease stage in nearly 2100 farmed deer depopulated in the United States and Canada, including 714 CWD-positive deer and correlate our findings with PRNP genotype, including the more rare 95H, 116G, and 226K alleles. We found significant differences in either likelihood of being found infected or disease stage (and in many cases both) at the time of depopulation in all genotypes present, relative to the most common 96GG genotype. Despite high prevalence in many of the herds examined, infection was not found in several of the reported genotypes. These findings suggest that additional research is necessary to more properly define the role that these genotypes may play in managing CWD in both farmed and free-ranging white-tailed deer, with consideration for factors including relative fitness levels, incubation periods, and the kinetics of shedding in animals with these rare genotypes.
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Affiliation(s)
- Nicholas J. Haley
- Department of Microbiology and Immunology, College of Graduate Studies, Midwestern University, Glendale, Arizona
| | - Kahla Merrett
- Department of Microbiology and Immunology, College of Graduate Studies, Midwestern University, Glendale, Arizona
| | - Amy Buros Stein
- Office of Research and Sponsored Programs, Midwestern University, Glendale, Arizona
| | - Dennis Simpson
- Simpson Whitetails Genetic Testing, Belleville, Michigan
| | - Andrew Carlson
- Simpson Whitetails Genetic Testing, Belleville, Michigan
| | - Gordon Mitchell
- National and OIE Reference Laboratory for Scrapie and CWD, Canadian Food Inspection Agency, Ottawa Laboratory-Fallowfield, Ottawa, Ontario, Canada
| | - Antanas Staskevicius
- National and OIE Reference Laboratory for Scrapie and CWD, Canadian Food Inspection Agency, Ottawa Laboratory-Fallowfield, Ottawa, Ontario, Canada
| | - Tracy Nichols
- United States Department of Agriculture, APHIS, Veterinary Services, Cervid Health Program, Fort Collins, Colorado, United States of America
| | - Aaron D. Lehmkuhl
- United States Department of Agriculture, APHIS, Veterinary Services, National Veterinary Services Laboratories, Ames, Iowa, United States of America
| | - Bruce V. Thomsen
- United States Department of Agriculture, APHIS, Veterinary Services, National Veterinary Services Laboratories, Ames, Iowa, United States of America
- United States Department of Agriculture, APHIS, Veterinary Services, Center for Veterinary Biologics, Ames, Iowa, United States of America
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Kim YC, Kim SK, Jeong BH. Scrapie susceptibility-associated indel polymorphism of shadow of prion protein gene (SPRN) in Korean native black goats. Sci Rep 2019; 9:15261. [PMID: 31649311 PMCID: PMC6813300 DOI: 10.1038/s41598-019-51625-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Accepted: 10/04/2019] [Indexed: 12/17/2022] Open
Abstract
Prion diseases in sheep and goats are called scrapie and belong to a group of transmissible spongiform encephalopathies (TSEs) caused by the abnormal misfolding of the prion protein encoded by the prion protein gene (PRNP). The shadow of the prion protein gene (SPRN) is the only prion gene family member that shows a protein expression profile similar to that of the PRNP gene in the central nervous system. In addition, genetic susceptibility of the SPRN gene has been reported in variant Creutzfeldt-Jakob disease (CJD), bovine spongiform encephalopathy (BSE) and scrapie. However, genetic studies of the SPRN gene have not been carried out in Korean native black goats. Here, we investigated the genotype and allele frequencies of SPRN polymorphisms in 213 Korean native black goats and compared these polymorphisms with those previously reported for scrapie-affected animals. We found a total of 6 polymorphisms including 1 nonsynonymous single nucleotide polymorphism (SNP) and 1 synonymous SNP in the open reading frame (ORF) region and 3 SNPs and 1 indel polymorphism (c.495_496insCTCCC) in the 3' untranslated region (UTR) by direct DNA sequencing. A significant difference in the allele frequency of the c.495_496insCTCCC indel polymorphism was found between the Italian scrapie-affected goats and the Korean native black goats (P < 0.001). Furthermore, there was a significant difference in the allele frequencies of the c.495_496insCTCCC indel polymorphism between Italian healthy goats and Korean native black goats (P < 0.001). To evaluate the biological impact of the novel nonsynonymous SNP c.416G > A (Arg139Gln), we carried out PROVEAN analysis. PROVEAN predicted the SNP as 'Neutral' with a score of -0.297. To the best of our knowledge, this is the first genetic study of the SPRN gene in Korean native black goats.
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Affiliation(s)
- Yong-Chan Kim
- Korea Zoonosis Research Institute, Chonbuk National University, Iksan, 54531, Republic of Korea
- Department of Bioactive Material Sciences and Institute for Molecular Biology and Genetics, Chonbuk National University, Jeonju, 54896, Republic of Korea
| | - Seon-Kwan Kim
- Korea Zoonosis Research Institute, Chonbuk National University, Iksan, 54531, Republic of Korea
- Department of Bioactive Material Sciences and Institute for Molecular Biology and Genetics, Chonbuk National University, Jeonju, 54896, Republic of Korea
| | - Byung-Hoon Jeong
- Korea Zoonosis Research Institute, Chonbuk National University, Iksan, 54531, Republic of Korea.
- Department of Bioactive Material Sciences and Institute for Molecular Biology and Genetics, Chonbuk National University, Jeonju, 54896, Republic of Korea.
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Akis I, Oztabak K, Atmaca G, Esen Gursel F, Ates A, Yardibi H, Gurgoze S, Durak MH, Erez I, Un C. PRNP gene polymorphisms in main indigenous Turkish goat breeds. Trop Anim Health Prod 2019; 52:793-802. [PMID: 31630310 DOI: 10.1007/s11250-019-02070-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Accepted: 09/06/2019] [Indexed: 11/30/2022]
Abstract
The polymorphisms of the PRNP gene influence the susceptibility to scrapie in goats. In this study, caprine PRNP gene was analysed in a total of 249 individuals from three main indigenous goat breeds of Turkey: Anatolian Black, Angora and Kilis. We focused on the Anatolian Black breed, which represents 97% of the goat population in Turkey and compared the data of samples originated from different geographical regions. Eight polymorphisms were determined, given rise to 12 haplotypes. Allele, genotype and haplotype frequencies of the polymorphisms at codons 142, 143, 146, 154, 171, 211, 222 and 240 were calculated. Alleles associated to resistance to scrapie were found to be relatively rare in all breeds. The resistance allele 222K was absent in Turkish breeds. Other resistance-associated alleles: 146D, 146S, 154H and 171R were observed with low frequencies. The results of this study, which cover the mainly bred indigenous goats in Turkey, present the distribution of PRNP polymorphisms. Very low frequencies of resistance-associated alleles show the susceptibility to scrapie. The resistance-associated alleles S and D of codon 146 might be accepted as candidate alleles, due to their relative higher frequencies observed in the present study. A breeding program aiming to increase particularly the frequency of 146S might be applied. Predictions about impacts of a long-term breeding programme based on low initial allele frequencies and regarding its possible adverse effects are warranted. Our results might be a database for future breeding programmes, which should be carefully designed with adequate levels of genetic resistance and acceptable timeframe.
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Affiliation(s)
- Iraz Akis
- Department of Biochemistry, Faculty of Veterinary Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey.
| | - Kemal Oztabak
- Department of Biochemistry, Faculty of Veterinary Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Gizem Atmaca
- Department of Biochemistry, Faculty of Veterinary Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Feraye Esen Gursel
- Department of Biochemistry, Faculty of Veterinary Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Atila Ates
- Department of Biochemistry, Faculty of Veterinary Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Hasret Yardibi
- Department of Biochemistry, Faculty of Veterinary Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Sema Gurgoze
- Department of Biochemistry, Faculty of Veterinary Medicine, Dicle University, Diyarbakir, Turkey
| | - M Hanifi Durak
- Department of Biochemistry, Faculty of Veterinary Medicine, Dicle University, Diyarbakir, Turkey
| | - Ibrahim Erez
- Department of Zootechnics, Faculty of Agriculture, Cukurova University, Adana, Turkey
| | - Cemal Un
- Department of Biology, Faculty of Science, Ege University, Izmir, Turkey
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Vouraki S, Gelasakis AI, Ekateriniadou LV, Banos G, Arsenos G. Impact of polymorphisms at the PRNP locus on the performance of dairy goats reared under low-input pastoral farming systems. Small Rumin Res 2019. [DOI: 10.1016/j.smallrumres.2019.03.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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