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He X, Memon S, Yue D, Zhu J, Lu Y, Liu X, Xiong H, Li G, Deng W, Xi D. PRNP gene polymorphism frequencies for comparing possible vulnerability to BSE in Chinese bovine population. Anim Biotechnol 2023; 34:2433-2440. [PMID: 35875846 DOI: 10.1080/10495398.2022.2095515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
Among the numerous transmissible spongiform encephalopathies (TSEs), bovine spongiform encephalopathy (BSE) is the most well-known TSEs. It is a potential Creutzfeldt-Jakob (CJD) disease mutation that can be transferred through cattle to humans. In several animals, the prion protein gene (PRNP) is recognized to take active part in TSE vulnerability or tolerance. Previous studies have found indels polymorphism in PRNP gene promoter and intron1 region linked to BSE vulnerability. It's linked with 23 bp indels polymorphism in putative promoter and 12 bp indel in intron 1 of the PRNP gene. The aim of this study was to compare the allele, genotype and haplotype frequencies of PRNP indel polymorphisms in Zhongdian Yak (Bos grunniens) (YK), Zhongdian Yellow cattle (Bos taurus) (YC) and Zhongdian Yakow (Bos primigenius taurus × Bos grunniens) (PK) with worldwide reported healthy or affected BSE cattle, in order to assess their potential resistance to BSE. A comparison of Chinese bovine populations with healthy and BSE-affected German and Swiss cattle from globally was conducted, and result indicating significant difference (p < .001) between healthy and affected cattle. Additionally, as compared to prior studies with Chinese bovine population, the significant results were found. In this study, the allelic frequency D23 finding high deletion in all analyzed Chinese bovine species, and haplotype D12-D23 exhibited a less significant inclination toward susceptibility to BSE.
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Affiliation(s)
- Xiaoming He
- Yunnan Provincial Key Laboratory of Animal Nutrition and Feed, Faculty of Animal Science and Technology, Yunnan Agricultural University, Kunming, China
| | - Sameeullah Memon
- Yunnan Provincial Key Laboratory of Animal Nutrition and Feed, Faculty of Animal Science and Technology, Yunnan Agricultural University, Kunming, China
- Korea Zoonosis Research Institute, Jeonbuk National University, Hana-ro, Iksan, Jeonbuk, Republic of Korea
| | - Dan Yue
- Yunnan Provincial Key Laboratory of Animal Nutrition and Feed, Faculty of Animal Science and Technology, Yunnan Agricultural University, Kunming, China
| | - Junhong Zhu
- Yunnan Provincial Key Laboratory of Animal Nutrition and Feed, Faculty of Animal Science and Technology, Yunnan Agricultural University, Kunming, China
| | - Ying Lu
- Yunnan Provincial Key Laboratory of Animal Nutrition and Feed, Faculty of Animal Science and Technology, Yunnan Agricultural University, Kunming, China
| | - Xingneng Liu
- Yunnan Provincial Key Laboratory of Animal Nutrition and Feed, Faculty of Animal Science and Technology, Yunnan Agricultural University, Kunming, China
| | - Heli Xiong
- Yunnan Animal Science and Veterinary Institute, Kunming, China
| | - Guozhi Li
- Yunnan Provincial Key Laboratory of Animal Nutrition and Feed, Faculty of Animal Science and Technology, Yunnan Agricultural University, Kunming, China
| | - Weidong Deng
- Yunnan Provincial Key Laboratory of Animal Nutrition and Feed, Faculty of Animal Science and Technology, Yunnan Agricultural University, Kunming, China
| | - Dongmei Xi
- Yunnan Provincial Key Laboratory of Animal Nutrition and Feed, Faculty of Animal Science and Technology, Yunnan Agricultural University, Kunming, China
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Kannan TA, Jaganathan M, Ramanujam R, Msalya GM. Assessment of growth and population structure revealed sufficient genetic diversity among lambs of Mecheri sheep in Tamil Nadu, India. Small Rumin Res 2022. [DOI: 10.1016/j.smallrumres.2022.106781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Kim YC, Won SY, Jeong BH. Absence of single nucleotide polymorphisms (SNPs) in the open reading frame (ORF) of the prion protein gene (PRNP) in a large sampling of various chicken breeds. BMC Genomics 2019; 20:922. [PMID: 31795947 PMCID: PMC6892216 DOI: 10.1186/s12864-019-6315-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Accepted: 11/20/2019] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Prion diseases are zoonotic diseases with a broad infection spectrum among mammalian hosts and are caused by the misfolded prion protein (PrPSc) derived from the normal prion protein (PrPC), which encodes the prion protein gene (PRNP). Currently, although several prion disease-resistant animals have been reported, a high dose of prion agent inoculation triggers prion disease infection in these disease-resistant animals. However, in chickens, natural prion disease-infected cases have not been reported, and experimental challenges with prion agents have failed to cause infection. Unlike other prion disease-resistant animals, chickens have shown perfect resistance to prion disease thus far. Thus, investigation of the chicken PRNP gene could improve for understanding the mechanism of perfect prion-disease resistance. Here, we investigated the genetic characteristics of the open reading frame (ORF) of the chicken PRNP gene in a large sampling of various chicken breeds. RESULTS We found only tandem repeat deletion polymorphisms of the chicken PRNP ORF in the 4 chicken breeds including 106 Dekalb White, 100 Ross, 98 Ogolgye and 100 Korean native chickens. In addition, the distribution of chicken insertion/deletion polymorphisms was significantly different among the 4 chicken breeds. Finally, we found significant differences in the number of PRNP SNPs between prion disease-susceptible species and prion disease-resistant species. Notably, chickens lack SNPs in the ORF of the prion protein. CONCLUSION In this study, we found that the absence of SNPs in the chicken PRNP ORF is a notable feature of animals with perfect resistant to prion disease.
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Affiliation(s)
- Yong-Chan Kim
- Korea Zoonosis Research Institute, Chonbuk National University, 820-120 Hana-ro, Iksan, Jeonbuk, 54531, Republic of Korea
- Department of Bioactive Material Sciences, Chonbuk National University, Jeonju, Jeonbuk, 54896, Republic of Korea
| | - Sae-Young Won
- Korea Zoonosis Research Institute, Chonbuk National University, 820-120 Hana-ro, Iksan, Jeonbuk, 54531, Republic of Korea
- Department of Bioactive Material Sciences, Chonbuk National University, Jeonju, Jeonbuk, 54896, Republic of Korea
| | - Byung-Hoon Jeong
- Korea Zoonosis Research Institute, Chonbuk National University, 820-120 Hana-ro, Iksan, Jeonbuk, 54531, Republic of Korea.
- Department of Bioactive Material Sciences, Chonbuk National University, Jeonju, Jeonbuk, 54896, Republic of Korea.
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Memon S, Li G, Xiong H, Wang L, Liu X, Yuan M, Deng W, Xi D. Deletion / insertion polymorphisms of the prion protein gene (PRNP) in gayal (Bos frontalis). J Genet 2018. [DOI: 10.1007/s12041-018-1005-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Yang Q, Zhang S, Liu L, Lei C, Qi X, Lin F, Qu W, Qi X, Liu J, Wang R, Chen H, Lan X. The evaluation of 23-bp and 12-bp insertion/deletion within the PRNP gene and their effects on growth traits in healthy Chinese native cattle breeds. JOURNAL OF APPLIED ANIMAL RESEARCH 2017. [DOI: 10.1080/09712119.2017.1348950] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Qing Yang
- College of Animal Science and Technology, Northwest A&F University, Shaanxi Key Laboratory of Molecular Biology for Agriculture, Yangling, People’s Republic of China
| | - Sihuan Zhang
- College of Animal Science and Technology, Northwest A&F University, Shaanxi Key Laboratory of Molecular Biology for Agriculture, Yangling, People’s Republic of China
| | - Liangliang Liu
- School of Business Information, Shanghai University of International Business and Economics, Shanghai, People’s Republic of China
| | - Chuzhao Lei
- College of Animal Science and Technology, Northwest A&F University, Shaanxi Key Laboratory of Molecular Biology for Agriculture, Yangling, People’s Republic of China
| | - Xinglei Qi
- Xia'nan cattle Technology Development Company, Biyang, People’s Republic of China
- Bureau of Animal Husbandry, Biyang, People’s Republic of China
| | - Fengpeng Lin
- Xia'nan cattle Technology Development Company, Biyang, People’s Republic of China
- Bureau of Animal Husbandry, Biyang, People’s Republic of China
| | - Weidong Qu
- Bureau of Animal Husbandry, Biyang, People’s Republic of China
| | - Xingshan Qi
- Bureau of Animal Husbandry, Biyang, People’s Republic of China
| | - Jiming Liu
- Animal Husbandry Technology Promotion Station of Jiangxi, Nanchang, People’s Republic of China
| | - Rongmin Wang
- Animal Husbandry Technology Promotion Station of Jiangxi, Nanchang, People’s Republic of China
| | - Hong Chen
- College of Animal Science and Technology, Northwest A&F University, Shaanxi Key Laboratory of Molecular Biology for Agriculture, Yangling, People’s Republic of China
| | - Xianyong Lan
- College of Animal Science and Technology, Northwest A&F University, Shaanxi Key Laboratory of Molecular Biology for Agriculture, Yangling, People’s Republic of China
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Zhao H, Du Y, Chen S, Qing L, Wang X, Huang J, Wu D, Zhang Y. The prion protein gene polymorphisms associated with bovine spongiform encephalopathy susceptibility differ significantly between cattle and buffalo. INFECTION GENETICS AND EVOLUTION 2015; 36:531-538. [PMID: 26319996 DOI: 10.1016/j.meegid.2015.08.031] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Revised: 08/19/2015] [Accepted: 08/24/2015] [Indexed: 10/23/2022]
Abstract
Prion protein, encoded by the prion protein gene (PRNP), plays a crucial role in the pathogenesis of transmissible spongiform encephalopathies (TSEs). Several polymorphisms within the PRNP are known to be associated with influencing bovine spongiform encephalopathy (BSE) susceptibility in cattle, namely two insertion/deletion (indel) polymorphisms (a 23-bp indel in the putative promoter and a 12-bp indel in intron 1), the number of octapeptide repeats (octarepeats) present in coding sequence (CDS) and amino acid polymorphisms. The domestic buffaloes, Bubalus bubalis, are a ruminant involved in various aspects of agriculture. It is of interest to ask whether the PRNP polymorphisms differ between cattle and buffalo. In this study, we analyzed the previously reported polymorphisms associated with BSE susceptibility in Chinese buffalo breeds, and compared these polymorphisms in cattle with BSE, healthy cattle and buffalo by pooling data from the literature. Our analysis revealed three significant findings in buffalo: 1) extraordinarily low deletion allele frequencies of the 23- and 12-bp indel polymorphisms; 2) significantly low allelic frequencies of six octarepeats in CDS and 3) the presence of S4R, A16V, P54S, G108S, V123M, S154N and F257L substitutions in buffalo CDSs. Sequence alignments comparing the buffalo coding sequence to other species were analyzed using the McDonald-Kreitman test to reveal five groups (Bison bonasus, Bos indicus, Bos gaurus, Boselaphus tragocamelus, Syncerus caffer caffer) with significantly divergent non-synonymous substitutions from buffalo, suggesting potential divergence of buffalo PRNP and others. To the best of our knowledge this is the first study of PRNP polymorphisms associated with BSE susceptibility in Chinese buffalo. Our findings have provided evidence that buffaloes have a unique genetic background in the PRNP gene in comparison with cattle.
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Affiliation(s)
- Hui Zhao
- Laboratory for Conservation and Utilization of Bio-resource, Yunnan University, Kunming 650091, China
| | - Yanli Du
- Laboratory for Conservation and Utilization of Bio-resource, Yunnan University, Kunming 650091, China
| | - Shunmei Chen
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, China
| | - Lili Qing
- Laboratory for Conservation and Utilization of Bio-resource, Yunnan University, Kunming 650091, China
| | - Xiaoyan Wang
- Laboratory for Conservation and Utilization of Bio-resource, Yunnan University, Kunming 650091, China
| | - Jingfei Huang
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, China
| | - Dongdong Wu
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, China.
| | - Yaping Zhang
- Laboratory for Conservation and Utilization of Bio-resource, Yunnan University, Kunming 650091, China; State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, China.
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Msalya G, Shimogiri T, Matsumoto Y, Okamoto S, Kawabe K, Maeda Y. South-East Asia Bovine Populations and The Japanese Cattle Breeds do not Harbour The E211K Variant of The PRNP. ITALIAN JOURNAL OF ANIMAL SCIENCE 2014. [DOI: 10.4081/ijas.2014.2996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Msalya G, Shimogiri T, Okamoto S, Kawabe K, Maeda Y. Short Communication: The double deletion diplotype showed low levels of prion protein at two indel loci of PRNP in the medulla oblongata of Japanese Brown cattle. CANADIAN JOURNAL OF ANIMAL SCIENCE 2012. [DOI: 10.4141/cjas2011-116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Msalya, G., Shimogiri, T., Okamoto, S., Kawabe, K. and Maeda, Y. 2012. Short Communication: The double deletion diplotype showed low levels of prion protein at two indel loci of PRNP in the medulla oblongata of Japanese Brown cattle. Can. J. Anim. Sci. 92: 153–157. Transmissible spongiform encephalopathies (TSEs) are a class of fatal neurodegenerative diseases caused by abnormally folded prion proteins (PrP). The PrP is necessary for the transmission and propagation of TSE diseases. In this study, PrP was quantified in the medulla oblongata of 39 Japanese Brown (JBr) animals that were genotyped for two indels in the PRNP gene – a 23 bp deletion in the promoter region and a 12 bp deletion in the first intron. The mean level of PrP was greater in the ++/++ diplotype than in −−/−− and +−/+− diplotypes, although the differences were not significant. These results suggest that the amount of PrP in the medulla oblongata of animals is related to these indels. However, given that there have been no reported cases of BSE in Japanese Brown animals, the relationship of the indels and PrP levels with the incidence of BSE is unclear.
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Affiliation(s)
- George Msalya
- United Graduate School of Agriculture, Kagoshima University, 1-21-24 Korimoto Kagoshima 890-0065, Japan
- Present address: Department of Animal Science and Production, Sokoine University of Agriculture, P.O. Box 3004, SUA, Morogoro, Tanzania
| | - Takeshi Shimogiri
- Faculty of Agriculture, Kagoshima University, 1-21-24 Korimoto Kagoshima 890-0065, Japan
| | - Shin Okamoto
- Faculty of Agriculture, Kagoshima University, 1-21-24 Korimoto Kagoshima 890-0065, Japan
| | - Kotaro Kawabe
- Frontier Science Research Centre, Kagoshima University, 1-21-24 Korimoto Kagoshima 890-0065, Japan
| | - Yoshizane Maeda
- Faculty of Agriculture, Kagoshima University, 1-21-24 Korimoto Kagoshima 890-0065, Japan
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Hou J, An X, Li G, Wang Y, Song Y, Cao B. Exploring polymorphisms and their effects on reproductive traits of the INHA and INHβA genes in three goat breeds. Anim Sci J 2011; 83:273-8. [PMID: 22515685 DOI: 10.1111/j.1740-0929.2011.00968.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this study, we report the analysis of INHA and INHβA gene polymorphisms in 786 goats of three breeds: Xinong Saanen (SN), Guanzhong (GZ) and Boer (BG). We identified three new allelic variants: P1-C80G and/126G (GenBank accession no. HQ202573) in the three goat breeds and P2-C936T (GenBank accession no. HQ202572) in SN and GZ goat breeds. At P1 locus, AA, AB and BB genotypes were found in the three goat breeds. At P2 locus, CC and CT genotypes were found in SN and GZ goat breeds. After comparing genotype distribution within the three goat breeds, BG had conspicuous differences from SN and GZ (P < 0.001) at P2 locus. The SNP locus was in Hardy-Weinberg disequilibrium at P1 locus in the three goat breeds (P < 0.05). At P2 locus, the SNP locus was in Hardy-Weinberg disequilibrium in SN and GZ goat breeds (P < 0.05). Association of polymorphisms with litter size was done at P1 locus in the three goat breeds. The result showed that AA genotype had remarkable litter size at P1 locus in the three goat breeds (P < 0.05). Therefore, these results suggest that INHA gene is a strong candidate gene that affects litter size in goats.
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Affiliation(s)
- Jinxing Hou
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
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Zhu XY, Feng FY, Xue SY, Hou T, Liu HR. Bovine spongiform encephalopathy associated insertion/deletion polymorphisms of the prion protein gene in the four beef cattle breeds from North China. Genome 2011; 54:805-11. [DOI: 10.1139/g11-043] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Two insertion/deletion (indel) polymorphisms of the prion protein gene (PRNP), a 23-bp indel in the putative promoter region and a 12-bp indel within intron I, are associated with the susceptibility to bovine spongiform encephalopathy (BSE) in cattle. In the present study, the polymorphism frequencies of the two indels in four main beef cattle breeds (Hereford, Simmental, Black Angus, and Mongolian) from North China were studied. The results showed that the frequencies of deletion genotypes and alleles of 23- and 12-bp indels were lower, whereas the frequencies of insertion genotypes and alleles of the two indels were higher in Mongolian cattle than in the other three cattle breeds. In Mongolian cattle, the 23-bp insertion / 12-bp insertion was the major haplotype, whereas in Hereford, Simmental, and Black Angus cattle, the 23-bp deletion / 12-bp deletion was the major haplotype. These results demonstrated that Mongolian cattle could be more resistant to BSE, compared with the other three cattle breeds, because of its relatively low frequencies of deletion genotypes and alleles of 23- and 12-bp indel polymorphisms. Thus, this race could be important for selective breeding to improve resistance against BSE in this area.
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Affiliation(s)
- Xiang-Yuan Zhu
- Department of Biochemistry and Molecular Biology, College of Life Sciences, Inner Mongolia Agricultural University, Hohhot, China
| | - Fu-Ying Feng
- Department of Biochemistry and Molecular Biology, College of Life Sciences, Inner Mongolia Agricultural University, Hohhot, China
| | - Su-Yuan Xue
- Inner Mongolia Academy of Agricultural Sciences, Hohhot, China
| | - Ting Hou
- Department of Biochemistry and Molecular Biology, College of Life Sciences, Inner Mongolia Agricultural University, Hohhot, China
| | - Hui-Rong Liu
- Department of Biochemistry and Molecular Biology, College of Life Sciences, Inner Mongolia Agricultural University, Hohhot, China
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Msalya G, Shimogiri T, Ohno S, Okamoto S, Kawabe K, Minezawa M, Maeda Y. Evaluation of PRNP expression based on genotypes and alleles of two indel loci in the medulla oblongata of Japanese Black and Japanese Brown cattle. PLoS One 2011; 6:e18787. [PMID: 21611160 PMCID: PMC3097178 DOI: 10.1371/journal.pone.0018787] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2010] [Accepted: 03/20/2011] [Indexed: 11/28/2022] Open
Abstract
Background Prion protein (PrP) level plays the central role in bovine spongiform encephalopathy (BSE) susceptibility. Increasing the level of PrP decreases incubation period for this disease. Therefore, studying the expression of the cellular PrP or at least the messenger RNA might be used in selection for preventing the propagation of BSE and other prion diseases. Two insertion/deletion (indel) variations have been tentatively associated with susceptibility/resistance of cattle to classical BSE. Methodology/Principal Findings We studied the expression of each genotype at the two indel sites in Japanese Black (JB) and Japanese Brown (JBr) cattle breeds by a standard curve method of real-time PCR. Five diplotypes subdivided into two categories were selected from each breed. The two cattle breeds were considered differently. Expression of PRNP was significantly (p<0.0001) greater in the homozygous deletion genotype at the 23-bp locus in JB breed. Compared to the homozygous genotypes, the expression of PRNP was significantly greater in the heterozygous genotype at the 12-bp locus in JB (p<0.0001) and in JBr (p = 0.0394) breeds. In addition, there was a statistical significance in the PRNP levels between the insertion and the deletion alleles of the 23-bp locus in JB (p = 0.0003) as well as in JBr (p = 0.0032). There was no significance in relation to sex, age, geographical location or due to their interactions (p>0.05). Conclusion Our results suggest that the del/del genotype or at least its del allele may modulate the expression of PRNP at the 23-bp locus in the medulla oblongata of these cattle breeds.
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Affiliation(s)
- George Msalya
- United Graduate School of Agriculture, Kagoshima University, Kagoshima City, Japan.
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Populationwide Investigation of Two Indel Polymorphisms at the Prion Protein Gene in Polish Holstein–Friesian Cattle. Biochem Genet 2011; 49:303-12. [PMID: 21221760 DOI: 10.1007/s10528-010-9408-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2010] [Accepted: 09/30/2010] [Indexed: 10/18/2022]
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Qin LH, Zhao YM, Bao YH, Bai WL, Chong J, Zhang GL, Zhang JB, Zhao ZH. Polymorphism of the prion protein gene (PRNP) in two Chinese indigenous cattle breeds. Mol Biol Rep 2010; 38:4197-204. [PMID: 21120616 DOI: 10.1007/s11033-010-0541-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2010] [Accepted: 11/16/2010] [Indexed: 10/18/2022]
Abstract
Prion protein (PRNP) gene has been located at position q17 of chromosome 13 in cattle. The polymorphisms of PRNP gene might be associated with BSE susceptibility. In the present work, we investigated the polymorphisms of PRNP gene, including SNP in exon 3, 23-bp indel in promoter region, 12-bp indel in intron 1 in 2 Chinese indigenous cattle breeds of northeast China. Eighty-six animals from Yanbian (34) and Chinese Red Steppes (52) were genotyped at PRNP locus by analyzing genomic DNA. A total of 4 single nucleotide polymorphism (SNP) sites were revealed in the PRNP gene exon 3 of the 2 cattle breeds investigated. Three of these SNPs were non-synonymous mutations that resulted in the amino acid exchanges (K119N, S154N, and M177V), and one is silent nucleotide substitutions (A234G). The two amino acid mutations of S154N and M177V were detected only in Yanbian with a very low frequency (0.0147), and they appears to be absent in Chinese Red Steppes. The average gene heterozygosity (He), effective allele numbers (Ne), Shannon's information index (I) and polymorphism information content (PIC) were 0.3088, 1.5013, 0.3814 and 0.2000 in Yanbian, respectively, being relatively higher than that of Chinese Red Steppes (0.2885, 1.4985, 0.3462 and 0.1873, respectively). In 23-bp indel and 12-bp indel loci, three different genotypes were identified in both Yanbian and Chinese Red Steppes breeds. Based 23- and 12-bp indels, four haplotypes was constructed in the 2 Chinese cattle breeds, of which the 23-bp (-)/12-bp (-) was main haplotypes accounting for more than 50% of the total in both Yanbian and Chinese Red Steppes breeds. These results might be useful in understanding the genetic characteristics of PRNP gene in Chinese indigenous cattle breeds.
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Affiliation(s)
- L H Qin
- College of Animal Science and Veterinary Medicine, Jilin University, Changchun, 130062, China
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Shimogiri T, Msalya G, Myint SL, Okamoto S, Kawabe K, Tanaka K, Mannen H, Minezawa M, Namikawa T, Amano T, Yamamoto Y, Maeda Y. Allele distributions and frequencies of the six prion protein gene (PRNP) polymorphisms in Asian native cattle, Japanese breeds, and mythun (Bos frontalis). Biochem Genet 2010; 48:829-39. [PMID: 20623331 DOI: 10.1007/s10528-010-9364-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2010] [Accepted: 04/12/2010] [Indexed: 11/28/2022]
Abstract
Six polymorphic sites of the bovine prion protein gene (PRNP) were genotyped in 569 animals of Asian native cattle, Japanese breeds, purebred mythun (Bos frontalis), and mythun x cattle composite animals. At the 23-bp indel site, a deletion (23-) allele was a major allele in all populations except mythun. At the 12-bp indel site, an insertion (12+) allele was a major allele in all populations. The 14-bp indel site was polymorphic in all Asian native cattle. In the octapeptide repeat region, a six-repeat allele was a major allele in all populations, and 5/5 and 4/6 genotypes were detected in Japanese Black and Mongolian cattle and in mythun, respectively. Two nonsynonymous single nucleotide polymorphisms (SNPs) (K3T and S154N) were detected in Asian native cattle and mythun. Haplotype analysis using the genotypes of the six sites estimated 33 different haplotypes. The haplotype 23- 12- K 6 S 14+ was found in all populations.
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Affiliation(s)
- Takeshi Shimogiri
- Laboratory of Animal Breeding and Genetics, Faculty of Agriculture, Kagoshima University, 1-21-24 Korimoto, Kagoshima, 890-0065, Japan,
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Indels within promoter and intron 1 of bovine prion protein gene modulate the gene expression levels in the medulla oblongata of two Japanese cattle breeds. Anim Genet 2009; 41:218-21. [PMID: 19917050 DOI: 10.1111/j.1365-2052.2009.01983.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Genetic differences which exist in the prion protein gene (PRNP) have been reported to influence susceptibility of humans, sheep and goats to prion diseases. In cattle, however, none of the known coding polymorphisms has a direct effect on bovine spongiform encephalopathy (BSE). It has been reported that 23-bp insertion/deletion (indel) polymorphisms within the promoter region have a tentative association to BSE susceptibility in German cattle, and a lower number of 24-bp repeat units in the open reading frame (ORF) was reported to reduce BSE susceptibility in transgenic mice. In this study, because of the hypothesis that bovine PRNP promoter polymorphisms cause changes in PRNP expression, we genotyped PRNP polymorphisms in the promoter and intron 1 using 218 genomic DNA samples from two Japanese cattle breeds. We also analysed the expression levels of prion in 40 animals by quantification of real-time PCR using mRNAs extracted from the medulla oblongata to study the relationship between PRNP genotypes and PRNP expression. We found a significant correlation between promoter indel polymorphisms and PRNP-mRNA expression (P(0.0413)) and therefore hypothesize that differences in polymorphisms could be one of the causes of differences in PRNP expression levels. We also report a novel difference in PRNP expression (P < 0.0001) between Japanese Black and Japanese Brown cattle breeds. There was no significant difference based on age and sex of the animals.
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