A Comparison of UVB-carcinogenesis between Nude Mice and Nude Beige Mice
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概要
- 論文の詳細を見る
To gain an insight into the relationship between UVB-carcinogenesis and natural killer activity, we examined ultraviolet light-induced carcinogenesis in mice with high natural killer activity (KSN) and mice with natural killer deficiency (KSN-bg). We exposed mice six times a week to three levels of daily ultraviolet B (UVB) doses; 320, 160 and 0 J/m^2 /day. During the latency period of skin tumor development in KSN mice, we detected no suppression of the natural killer activity at both 320 and 160 J/m^2 /day. Even at 1340 J/m^2 /day, we could not detect any significant suppression of NK activity in KSN mice. When we irradiated spleen cells in vitro, we observed NK activity suppression. Next, we compared the carcinogenic effects of UVB-irradiation on KSN and KSN-bg mice. At 320 J/m^2 /day, we detected no significant differences between them. In contrast, at 160 J/m^2 /day, KSN-bg mice showed a significantly higher rate of skin tumor induction than KSN mice (p<0.05). Most UVB-induced tumors were squamous cell carcinoma, the rest were spindle cell carcinoma, papilloma and mixed type. Our results suggest that NK activity plays a protective role against UVB-carcinogenesis from low daily-doses of UVB-irradiation.
- 日本放射線影響学会の論文
著者
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Ishigaki Y
Laboratory Of Molecular Human Genetics Faculty Of Pharmaceutical Sciences Kanazawa University
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Ishigaki Yasuhito
Department Of Radiation Biology Faculty Of Pharmaceutical Sciences Kanazawa University
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Ishigaki Yasuhito
金沢大学 薬 分子細胞薬
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Hiai H
Kyoto Univ. Kyoto Jpn
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Hiai Hiroshi
Department Of Pathology And Biology Of Diseases Graduate School Of Medicine Kyoto University
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Hiai Hiroshi
京都大学 医学研究科法医学
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Hatano Hiromichi
Department Of Pathology And Biology Of Diseases Kyoto University Graduate School Of Medicine
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NIKAIDO Osamu
Kanazawa Univ.
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Haga Hironori
Organ Transplant Unit Kyoto University Hospital
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Nikaido O
Kanazawa Univ. Kanazawa Jpn
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Nikaido Osamu
Laboratory Of Molecular Human Genetics Faculty Of Pharmaceutical Sciences Kanazawa University
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Nikaido Osamu
Department Of Radiation Biology Faculty Of Pharmaceutical Sciences Kanazawa University
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Nikaido Osamu
Division Of Radiation Biology Faculty Of Pharmaceutical Science Kanazawa University
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Nikaido Osamu
Div. Radiation Biol. Kanazawa Univ.
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Hiai Hiroshi
Department Of Medical Chemistry And Molecular Biology Kyoto University Graduate School Of Medicine
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YASUDA KAZUHIRO
Department of Gastroenterological Surgery, Oita University Faculty of Medicine
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Haga Hironori
Laboratory Of Diagnostic Pathology Kyoto University Hospital
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ISHIGAKI Yasuhito
Laboratory of Molecular Human Genetics Faculty of Pharmaceutical Sciences Kanazawa University
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HASHIMOTO NORIYOSHI
Insitute for Experimental Animals, School of Medicine, Kanazawa University
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HAYAKAWA JUN-ICHIRO
Insitute for Experimental Animals, School of Medicine, Kanazawa University
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Hiai Hiroshi
Departments Of Pathology Graduate School Of Medicine Kyoto University
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Nikaido Osamu
Div. Radiat. Biol. Fac. Of Pharm. Sci. Kanazawa Univ.
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Hiai Hiroshi
Laboratory Of Diagnostic Pathology Kyoto University Hospital
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Yasuda Kazuhiro
Department Of Radiation Biology Faculty Of Pharmaceutical Sciences Kanazawa University
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Yasuda Kazuhiro
Department Of Applied Quantum Physics And Nuclear Engineering Faculty Of Engineering Kyushu Universi
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Hashimoto Noriyoshi
Insitute For Experimental Animals School Of Medicine Kanazawa University
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