| Project/Area Number |
16500279
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Laboratory animal science
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| Research Institution | Kitasato University |
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Principal Investigator |
HANAOKA Kazunori Kitasato Univ., School of Sci., Prof., 理学部, 教授 (40189577)
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| Co-Investigator(Kenkyū-buntansha) |
UCHIYAMA Koji Kitasato Univ., School of Sci., Res.Assis., 理学部, 助手 (20276174)
WATANABE Daisuke Kitasato Univ., School of Sci., Res.Assis., 理学部, 助手 (00260175)
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| Project Period (FY) |
2004 – 2005
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| Project Status |
Completed (Fiscal Year 2005)
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| Budget Amount *help |
¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 2005: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 2004: ¥2,000,000 (Direct Cost: ¥2,000,000)
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| Keywords | DMD / Muscular Dystrophy / ES cell / Artificial Chromosome / Muscle / regeneration / Cre-loxP / Chromosomal Technology / Cre-lox / ジストロフィン / 筋疾患 / アイソフォーム / マウス |
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| Research Abstract |
Duchenne muscular dystrophy (DMD) is caused by mutation in the 2.4-Mb dystrophin (DMD) gene. This gene encodes a number of tissue-specific isoforms of dystrophin generated by transcription from at least seven promoters and also by alternative splicing. We deleted entire genomic region of the DMD gene on mouse chromosome X using a Cre-loxP recombination system. The DMD-null mice were viable but displayed severe muscular hypertrophy and dystrophy. Production of multiple dystrophin isoforms due to alternative splicing or exon skipping was totally prevented in the DMD-null mouse. In addition, we introduced an artificial chromosome which contained the human dystrophin gene (HAC-DMD) into the DMD-null ES cells and subsequently produced chimeric mice using the ES cells. The mouse thus produced possesses the human DMD gene instead of mouse DMD gene. These new mutants will provide an improved model system for functional studies of human dystrophin and its isoforms.
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