Dimethylarsinic Acid Exposure Causes Accumulation of Hsp72 in Cell Nuclei and Suppresses Apoptosis in Human Alveolar Cultured (L-132) Cells
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概要
- 論文の詳細を見る
We previously found that 72-kDa heat shock protein (Hsp72) was induced and accumulated in the nuclei, together with DNA damage, in human alveolar epithelial (L-132) cells by exposure to dimethylarsinic acid (DMAA), which is a main metabolite of inorganic arsenics in mammals. In the present study, the intracellular behavior of Hsp72 was investigated during the recovery from the DNA damage induced by exposure to DMAA. L-132 cells were exposed to 10 mM DMAA for 3 h, and then incubated in DMAA-free medium. The induction of Hsp72 by exosure to DMAA reached a peak at 6-9 h after removal of DMAA. However, the cell-nuclear distribution of Hsp72 was observed until 3 h after the start of DMAA-free incubation. We further investigated the appearance of apoptosis of L-132 cells after exposure to 10 mM DMAA for 3 h. Internucleosomal DNA fragmentation and morphological changes, as criteria for the evidence of apoptosis, were observed 6-22 h after the start of DMAA-free incubation. The appearance of apoptosis was followed by the release of Hsp72 from the cell nuclei. These results suggest a possibility that the cell-nuclear Hsp72 may suppress the appearance of apoptosis in DNA-damaged cells.
- 公益社団法人日本薬学会の論文
- 1999-11-15
著者
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山中 健三
日本大学薬学部環境衛生学ユニット
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Okada S
Department Of Medical Biochemistry School Of Pharmaceutical Sciences University Of Shizuoka
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Okada S
Department Of Radiobiochemistry School Of Pharmaceutical Sciences University Of Shizuoka
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Okada S
Tokyo Medical Univ. Tokyo
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Okada S
Kumamoto Univ. Kumamoto Jpn
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Okada S
Univ. Shizuoka Shizuoka Jpn
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Kato K
College Of Pharmacy Nihon University
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Kato Katsuaki
Biosciences Research Laboratory Mochida Pharmaceutical Co. Ltd.
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Yamanaka Kenzo
College Of Pharmacy Nihon University
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Yamanaka Kenzo
Nihon University College Of Pharmacy
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Yamanaka Kenzo
Department Of Pharmacy College Of Science And Technology Nihon University
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HASEGAWA AKIRA
Nihon University, College of Pharmacy
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OKADA SHOJI
University of Shizuoka, School of Pharmaceutical Sciences
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KATO Koichi
Nihon University College of Pharmacy
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Hasegawa A
College Of Pharmacy Nihon University
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Yamanaka K
Department Of Internal Medicine Nagoya National Hospital:tokai Area Central Hospital For Aids Treatm
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Hasegawa Akira
Department Of Pharmacy College Of Science And Technology Nihon University
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