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Ishiyama D, Yamamoto K, Kikuchi M, Magata F, Takahashi K, Chambers JK, Uchida K, Fujiwara R, Mochizuki M, Inokuma H. Congenital syringohydromyelia in a crossbred (Holstein-Friesian × Japanese Black) beef calf. J Vet Med Sci 2021; 84:31-35. [PMID: 34866093 PMCID: PMC8810326 DOI: 10.1292/jvms.21-0441] [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] [Indexed: 11/22/2022] Open
Abstract
A 5-day-old male crossbred beef calf presented with a well-coordinated bilateral hopping gait of the hind limbs. Postmortem CT showed a poorly defined oval-shaped region at the L3–L4 spinal segments, which had high signal intensity on T2 weighted postmortem MRI images. On pathological examination, we identified a large cystic cavity filled with a large amount of cerebrospinal fluid on the cut surface of the spinal region. Histopathological examination revealed that the spinal cord parenchyma was compressed by the cystic structure, and the cystic cavity was lined with a thin layer of discrete ependymal cells, indicating syringohydromyelia. This is the first reported case of a Holstein-Friesian × Japanese Black crossbred calf with solitary syringohydromyelia. Our findings suggest that myelodysplasia with cystic cavities can be suspected by CT, without the need for MRI.
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Affiliation(s)
- Dai Ishiyama
- Yachiyo Branch Office, Western Veterinary Clinical Center, Chiba Prefectural Agricultural Mutual Aid Association
| | - Kie Yamamoto
- Department of Veterinary Medical Sciences, Graduate School of Agriculture and Life Sciences, The University of Tokyo
| | - Masato Kikuchi
- Yachiyo Branch Office, Western Veterinary Clinical Center, Chiba Prefectural Agricultural Mutual Aid Association
| | - Fumie Magata
- Department of Veterinary Medical Sciences, Graduate School of Agriculture and Life Sciences, The University of Tokyo
| | - Kei Takahashi
- Department of Veterinary Medical Sciences, Graduate School of Agriculture and Life Sciences, The University of Tokyo
| | - James K Chambers
- Department of Veterinary Medical Sciences, Graduate School of Agriculture and Life Sciences, The University of Tokyo
| | - Kazuyuki Uchida
- Department of Veterinary Medical Sciences, Graduate School of Agriculture and Life Sciences, The University of Tokyo
| | - Reina Fujiwara
- Department of Veterinary Medical Sciences, Graduate School of Agriculture and Life Sciences, The University of Tokyo
| | - Manabu Mochizuki
- Department of Veterinary Medical Sciences, Graduate School of Agriculture and Life Sciences, The University of Tokyo
| | - Hisashi Inokuma
- Department of Veterinary Medical Sciences, Graduate School of Agriculture and Life Sciences, The University of Tokyo
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Han J, Yang M, Guo T, Niu C, Liu J, Yue Y, Yuan C, Yang B. Two linked TBXT (brachyury) gene polymorphisms are associated with the tailless phenotype in fat-rumped sheep. Anim Genet 2019; 50:772-777. [PMID: 31475743 PMCID: PMC6899607 DOI: 10.1111/age.12852] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/29/2019] [Indexed: 12/15/2022]
Abstract
T‐box transcription factor T (TBXT), encoding the brachyury protein, is an embryonic nuclear transcription factor involved in mesoderm formation and differentiation. Previous studies indicate that TBXT mutations are responsible for the tailless or short‐tailed phenotype of many vertebrates. To verify whether the tailless phenotype in fat‐rumped sheep is associated with TBXT mutations, exon 2 of the TBXT gene for 301 individuals belonging to 13 Chinese and Iranian sheep breeds was directly sequenced. Meanwhile, 380 samples were used to detect the genotypes of the candidate variations by mapping to their reads databases in the Sequence Read Archive repository of GenBank. The results showed that one missense mutation, c.334G>T (GGG>TGG) with a completely linked synonymous variant c.333G>C (CCG>CCC) was found to be associated with the ‘tailless’ characteristic in typical fat‐rumped sheep breeds. The c.334G>T transversion led to the conversion of glycine to tryptophan at the 112th amino acid in the T‐box domain of the brachyury protein. In addition, crossbreeding experiments for long‐tailed and tailless sheep showed that CT/CT allele of nucleotides (nt) 333 and 334, a recessive mutation, would cause sheep tails to be shorter, suggesting that these two linked variants at nucleotides 333 and 334 in TBXT are probably causative mutations responsible for the tailless phenotype in sheep.
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Affiliation(s)
- J Han
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, 730050, China.,College of Animal Science and Technology, Shihezi University, Shihezi, 832000, China
| | - M Yang
- College of Animal Science and Technology, Shihezi University, Shihezi, 832000, China.,Key Laboratory of Animal (Poultry) Genetics Breeding and Reproduction, Ministry of Agriculture, Beijing, 100083, China
| | - T Guo
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, 730050, China
| | - C Niu
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, 730050, China
| | - J Liu
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, 730050, China
| | - Y Yue
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, 730050, China.,International Livestock Research Institute (ILRI), PO Box 30709, Nairobi, 00100, Kenya
| | - C Yuan
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, 730050, China
| | - B Yang
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, 730050, China
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Mueller K. Neurological disease in ruminants. Vet Rec 2017; 181:368-369. [DOI: 10.1136/vr.j4560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- Karin Mueller
- University of Liverpool; Leahurst Campus, Chester High Road, Neston CH64 7TE UK
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