Effect of Insulin-like Growth Factor-I on the Expression of EGR-1 and -2 in Human Periodontal Ligament Fibroblasts
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概要
- 論文の詳細を見る
The early growth response (EGR) gene family is nuclear transcription factor and is implicated in regulating cell proliferation. In this study, we investigated the effect of insulin-like growth factor (IGF)-I, which relates to oral tissue reconstruction, on the expression and localization of EGR-1 and EGR-2 in cultured human periodontal ligament fibroblasts (PDLFs) using molecular biological and immunocytochemical techniques. Three PDLF cell lines were first cultured for two days in serum-free Dulbecco's modified Eagle medium (DMEM) and further stimulated with various concentrations of IGF-I (1-100 ng/mL in DMEM). Stimulation of the cells with IGF-I increased, in a dose-dependent manner, the proliferation index of the cells as measured by 5-bromo 2'-deoxyuridine incorporation. The mRNA levels of EGR-1 peaked after 45 min of incubation of the cells with IGF-I at a concentration of 10 ng/mL. Further, the expression of EGR-2 mRNA was observed subsequent to incubation with IGF-I at a concentration of 1ng/mL. These changes correlated well with those seen at the protein levels. Immunocytochemical analyses showed strong immunostaining in or around the nucleus for EGR-1 or EGR-2 in IGF-I-treated cells. These results suggest that the EGR genes induced in IGF-I-stimulated human PDLF and may involve a potential important role in PDLF growth during tissue regeneration and healing in vivo.
- 日本再生歯科医学会の論文
- 2006-09-30
著者
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Kawamoto Akiyo
Department of Geriatric Dentistry, Osaka Dental University
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Hayashi Hiroyuki
Department of Endodontics, Osaka Dental University
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Tamura Isao
Department of Biochemistry Osaka Dental University
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Kamada Aiko
Department of Biochemistry Osaka Dental University
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Goda Seiji
Department of Biochemistry Osaka Dental University
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Domae Eisuke
Department of Biochemistry Osaka Dental University
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Ikeo Takashi
Department of Biochemistry Osaka Dental University
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Goda Seiji
大阪歯科大学 大学院歯学研究科口腔外科学
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Goda Seiji
Biochemistry Osaka Dental University
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Kawamoto Akiyo
Department Of Geriatric Dentistry Osaka Dental University
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Kamada Aiko
大阪歯科大学 生化学
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Ikeo Takashi
大阪歯科大学 生化学
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Domae Eisuke
大阪歯科大学 生化学
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Domae Eisuke
Graduate School of Dentistry(Biochemistry)
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SHIMOMURA Yasunori
Graduate School of Dentistry (Endodontics), Osaka Dental University
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Shimomura Yasunori
Graduate School Of Dentistry (endodontics) Osaka Dental University
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Kamada A
Department Of Geriatric Dentistry Osaka Dental University
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Hayashi Hiroyuki
Osaka Dental Univ. Osaka Jpn
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Kamada A
Department Of Biochemistry Osaka Dental University
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Hayashi Hiroyuki
Department Of Endodontics Osaka Dental University
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Ikeo T
Department Of Biochemistry Osaka Dental University
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Hayashi Hiroyuki
Department Of Cardiology Kanazawa Medical University
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Hayashi Hiroyuki
Department Of Applied Chemistry Faculty Of Engineering Osaka Institute Of Technology
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HAYASHI Hiroyuki
Department of Advanced Energy, University of Tokyo, Kashiwa, Chiba 277-8561, Japan
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