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タイトル: Optic pathway degeneration in Japanese black cattle
著者: CHIBA, Shiori
FUNATO, Shingo
HORIUCHI, Noriyuki
MATSUMOTO, Kotaro
INOKUMA, Hisashi
FURUOKA, Hidefumi
KOBAYASHI, Yoshiyasu
堀内, 雅之
松本, 高太郎
猪熊, 壽
古岡, 秀文
古林, 与志安
キーワード: axonal degeneration
gliosis
Japanese black cattle
optic pathway degeneration
発行日: 2015
出版者: 日本獣医学会
誌名: The Journal of Veterinary Medical Science
巻: 77
号: 2
開始ページ: 147-154
抄録: Degeneration of the optic pathway has been reported in various animal species including cattle. We experienced a case of bilateral optic tract degeneration characterized by severe gliosis in a Japanese black cattle without any obvious visual defects. To evaluate the significance, pathological nature and pathogenesis of the lesions, we examined the optic pathway in 60 cattle (41 Japanese black, 13 Holstein and 6 crossbreed) with or without ocular abnormalities. None of these animals had optic canal stenosis. Degenerative changes with severe gliosis in the optic pathway, which includes the optic nerve, optic chiasm and optic tract, were only observed in 8 Japanese black cattle with or without ocular abnormalities. Furthermore, strong immunoreactivity of glial fibrillary acidic protein was observed in the retinal stratum opticum and ganglion cell layer in all 5 cattle in which the optic pathway lesions could be examined. As etiological research, we also examined whether the concentrations of vitamin A and vitamin B12 or bovine viral diarrhea virus (BVDV) infection was associated with optic pathway degeneration. However, our results suggested that the observed optic pathway degeneration was probably not caused by these factors. These facts indicate the presence of optic pathway degeneration characterized by severe gliosis that has never been reported in cattle without bilateral compressive lesions in the optic pathway or bilateral severe retinal atrophy.
URI: http://ir.obihiro.ac.jp/dspace/handle/10322/4123
ISSN: 1347-7439
0916-7250
権利情報: 日本獣医学会
出現コレクション:00C01学術雑誌論文

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