Accumulation of Copper Induces DNA Strand Breaks in Brain Cells of Long-Evans Cinnamon (LEC) Rats, An Animal Model for Human Wilson Disease

• HAYASHI Masanobu

  Department of Veterinary Radiology, School of Veterinary Medicine, Rakuno Gakuen University

• FUSE Sayaka

  Department of Veterinary Radiology, School of Veterinary Medicine, Rakuno Gakuen University

• ENDOH Daiji

  Department of Veterinary Radiology, School of Veterinary Medicine, Rakuno Gakuen University

• HORIGUCHI Noboru

  Department of Veterinary Radiology, School of Veterinary Medicine, Rakuno Gakuen University

• NAKAYAMA Kenji

  Hokkaido Institute of Public Health

• KON Yasuhiro

  Laboratory of Anatomy, Graduate School of Veterinary Medicine, Hokkaido University

• OKUI Toyo

  Hokkaido Institute of Public Health

抄録

Copper accumulation and induction of DNA strand breaks were investigated in the brain of Long-Evans Cinnamon (LEC) rats, an animal model for human Wilson disease that is a heritable disease of copper accumulation and copper toxicity in the liver, kidney and brain. Copper contents in the brain of LEC rats increased from 20 weeks of age and were approximately 3.5 to 6 folds higher than those in the brain of WKAH rats at 24 weeks of age. Hepatic copper contents in LEC rats increased from 4 to 12 weeks of age in an age-dependent manner, and then decreased from 16 to 20 weeks of age. Thus, we consider that copper accumulated in the liver was released from severely damaged hepatocytes and deposited in the brain, although copper contents in the brain were 1/20-fold lower than those in the liver. We also evaluated the amounts of DNA single-strand breaks (SSBs) in the brain by comet analysis. The proportions of nuclei in the cerebrum and cerebellum without DNA damage decreased, and nuclei with severe DNA damage appeared in LEC rats at 24 weeks of age. The comet scores of cerebrum and cerebellum cells significantly increased in LEC rats and were significantly higher than those in WKAH rats at 24 weeks of age. The results show that SSBs in LEC rat brain cells are induced at a lower concentration of copper than are SSBs in hepatic cells.<br>

収録刊行物

• Experimental Animals

  Experimental Animals 55 (5), 419-426, 2006

  公益社団法人 日本実験動物学会

キーワード

• brain
• copper
• DNA strand breaks
• LEC rat
• Wilson disease model

詳細情報

• CRID: 1390001205047114624
• NII論文ID: 10018307755
• NII書誌ID: AA11032321
• DOI: 10.1538/expanim.55.419
• ISSN: 18817122
• ISSN: 00075124
• ISSN: 13411357
• NDL書誌ID: 8089635
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8089635
• Web Site: http://www.jstage.jst.go.jp/article/expanim/55/5/55_5_419/_pdf
• Web Site: https://search.jamas.or.jp/link/ui/2007141903
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可