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RISS 인기검색어
- 검색키워드
- 저자 : Norihiko Itoh (검색결과 2 건)
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Yoshiki Itoh,Yasuharu Izumisawa,Seiya Maehara,Kazuto Yamashita,Norihiko Itoh 대한수의학회 2013 JOURNAL OF VETERINARY SCIENCE Vol.14 No.1
Electroretinography (ERG) is a well-established diagnostic procedure for objectively evaluating retinal function. In this study, ERG in beagle dogs, which are a popular experimental animal, was performed to determine the normal range of ERG variables and assess differences between the left and right eyes. ERG findings including rod, combined rod-cone,single-flash cone, and 30-Hz flicker responses were recorded with an LED-electrode in 43 sedated beagle dogs. The subjects were divided into young (< 1 year old), adult (1∼5years old), and senile animals (≥ 6 years old). Normal ERG ranges were obtained. Significant differences in b-wave amplitude along with b/a ratio of the combined rod-cone response were found between the young and adult animals as well as young and senile dogs. No significant differences were observed between the left and right eyes. ERG variables in beagle dogs differed by age due to age-related retinal changes. Thus, we propose that normal ERG ranges should be determined according to age in each clinic and laboratory using its own equipment because each institution usually has different systems or protocols for ERG testing.
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Establishment of a canine mammary gland tumor cell line and characterization of its miRNA expression
Tomohiro Osaki,Yuji Sunden,Akihiko Sugiyama,Kazuo Azuma,Yusuke Murahata,Takeshi Tsuka,Norihiko Itoh,Tomohiro Imagawa,Yoshiharu Okamoto 대한수의학회 2016 Journal of Veterinary Science Vol.17 No.3
Canine mammary gland tumors (CMGTs), which are the most common neoplasms in sexually intact female dogs, have been suggested as a model for studying human breast cancer because of several similarities, including relative age of onset, risk factors, incidence, histological and molecular features, biological behavior, metastatic pattern, and responses to therapy. In the present study, we established a new cell line, the SNP cell line, from a CMGT. A tumor formed in each NOD.CB17-Prkdcscid/J mouse at the site of subcutaneous SNP cell injection. SNP cells are characterized by proliferation in a tubulopapillary pattern and are vimentin positive. Moreover, we examined miRNA expression in the cultured cells and found that the expression values of miRNA-143 and miRNA-138a showed the greatest increase and decrease, respectively, of all miRNAs observed, indicating that these miRNAs might play a significant role in the malignancy of SNP cells. Overall, the results of this study indicate that SNP cells might serve as a model for future genetic analysis and clinical treatments of human breast tumors.
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