SATO Hiroyuki

写真a

Title

Associate Professor

Research Fields, Keywords

Veterinary Neurology

Degree 【 display / non-display

  • Hokkaido University -  Doctor (Veterinary Medicine)

  • Hokkaido University -  Veterinary Medicine

Field of expertise (Grants-in-aid for Scientific Research classification) 【 display / non-display

  • Veterinary medical science

 

Papers 【 display / non-display

  • An atypical case of recurrent carotid body carcinoma in a young adult dog: Histopathological, immunohistochemical and electron microscopic study.

    Teh AP, Pratakpiriya W, Hidaka Y, Sato H, Hirai T, Yamaguchi R

    Journal of Veterinary Medical Science   79   714 - 718   2017.04  [Refereed]

    Joint Work

  • Application of fiber tractography and diffusion tensor imaging to evaluate spinal cord diseases in dogs

    Konishi Y., Satoh H., Kuroiwa Y., Kusaka M., Yamashita A., Asada Y., Asanuma T.

    Journal of Veterinary Medical Science   79   418 - 424   2017.02  [Refereed]

    Joint Work

     View Summary

    © 2017 The Japanese Society of Veterinary Science. Fiber tractography is a technique capable of depicting the three-dimensional structure and connectivity of nerve fibers using serial magnetic resonance diffusion tensor imaging (DTI). To establish fiber tractography and DTI methods in veterinary clinical medicine, we evaluated fiber tractography and DTI parameters: apparent diffusion coefficient (ADC) values and fractional anisotropy (FA) values, in various spinal cord diseases. Spinal cord DTI was examined in 28 dogs with spinal cord diseases. The ADC and FA values were measured at lesion sites and cranial normal sites on spinal cords, and both values of lesion sites were compared with normal sites. In thoracolumbar intervertebral disk herniation (IVDH) cases, depending on their neurologic grades, fiber tractography indicated rupture of fiber trajectories, loss of neuronal bundles and disorder of fiber directions. In these cases, the average ADC values at lesion sites significantly decreased compared with normal sites (P=0.016). In the progressive myelomalacia case, the average ADC and FA values of hyperintense swollen regions in T2WI decreased compared to both values in other disease cases. Finally, in the meningioma case, the continuity of fiber trajectories improved after the administration of an anticancer agent. This study suggests that fiber tractography and DTI are useful in the diagnosis and prognosis of veterinary spinal cord diseases.

    DOI PubMed CiNii

  • Multiple free-radical scavenging (MULTIS) capacity in cattle serum

    Sueishi Y., Kamogawa E., Kimura A., Kitahara G., Satoh H., Asanuma T., Oowada S.

    Journal of Clinical Biochemistry and Nutrition   60   76 - 80   2017.01  [Refereed]

    Joint Work

     View Summary

    © 2017 JCBN. Multiple free-radical scavenging (MULTIS) activity in cattle and human sera was evaluated with electron spin resonance spectros- copy. Scavenging rates against six active species, namely hydroxyl radical, superoxide anion, alkoxyl radical, alkylperoxyl radical, methyl radical, and singlet oxygen were quantified. The difference in the electron spin resonance signal intensity in the presence and absence of the serum was converted into the scavenging rates. Comparative MULTIS measurements were made in sera from eight beef cattle, three fetal calves and fifteen healthy human volunteers. Further, we determined the MULTIS value of albumin, the most abundant component in serum. MULTIS values in cattle sera indicated higher scavenging activity against most free radical species tested than human sera. In particular, cattle serum scavenging activities against superoxide and methyl radical were higher than human serum by 2.6 and 3.7 fold, respectively. In cattle serum, albumin appears to play a dominant role in MULTIS activity, but in human serum that is not the case. Previous data indicated that the abundance of uric acid in bovine blood is nearly 80% less than humans; however, this difference does not explain the deviation in MULTIS profile.

    DOI PubMed CiNii

  • Partial costectomy for tracheal collapse and stenosis associated with perinatal rib fracture in three Japanese Black calves

    HIDAKA Yuichi, HAGIO Mitsuyoshi, KASHIBA Ichiro, ANDO Kei, OTANI Yuki, SATOH Hiroyuki, KONISHI Yuko, TSUZUKI Nao, HOKAMURA Junichi, KAJISA Makoto, WADA Mie, KIRINO Yumi, ASANUMA Taketoshi

    Journal of Veterinary Medical Science   78   451 - 455   2016  [Refereed]

    Joint Work

     View Summary

    2.3-month-old (Case 1), one-month-old (Case 2) and 6-month-old (Case 3), Japanese Black calves presented with mild to severe wheezing. All calves had histories of dystocia at birth with breech presentation. Physical examination, thoracic radiography, endoscopy or computed tomography indicated wheezing associated with tracheal collapse and stenosis caused by perinatal rib fractures. Partial resection of the fractured first and second ribs was performed on all calves. The respiration in Cases 1 and 2 immediately improved after the surgery, while Case 3 required two weeks to improve. Cases 1 and 3 grew up healthy and were sold at auction, but Case 2 had a recurrence of wheezing at three months post-discharge and showed growth retarding. Partial costectomy may be an effective solution for control of respiration, however, further cases are required to discuss the criteria for surgical management and to obtain favorable postoperative prognosis in calves with tracheal collapse and stenosis caused by perinatal rib fractures.

    DOI CiNii

  • Laparoscopic cryptochidectomy in standing bulls.

    Kaneko Y, TOrisu S, Kitahara G, Hidaka Y, Satoh H, Asanuma T, Mizutani S, Osawa T, Naganobu K

    The Journal of Veterinary Medical Science   77   631 - 635   2015.06  [Refereed]

    Joint Work

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