Technical Development for Production of Gene-Modified Laboratory Rats

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Transgenic rats have been used as model animals for human diseases and organ transplantation and as animal bioreactors for protein production. In general, transgenic rats are produced by pronuclear microinjection of exogenous DNA. Improvement of post-injection survival has been achieved by micro-vibration of the injection pipette. The promoter region, structural gene, chain length and strand ends of the exogenous DNA are not involved in the production efficiency of transgenic rats. Exogenous DNA prepared at 5 μg/ml seemed to be better integrated than lower and higher concentrations. Intracytoplasmic sperm injection (ICSI) has been successfully achieved in rats using a piezo-driven injection pipette. The ICSI technique has not only been applied to rescue infertile male strains but also to produce transgenic rats. The optimal DNA concentration for the ICSI-tg method (0.1 to 0.5 μg/ml) is lower than that for the conventional pronuclear microinjection. Production efficiency was improved when the membrane structure of the sperm head was partially disrupted by detergent or ultrasonic treatment before exposure to the exogenous DNA solution. For successful production of transgenic rats with a modified endogenous gene, establishment of embryonic stem cell lines or alternatively male germline stem cell lines and technical development of somatic cell nuclear transfer are still necessary for this species.<br>

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  • The Journal of reproduction and development  

    The Journal of reproduction and development 54(2), 95-99, 2008-04-01 

    THE SOCIETY FOR REPRODUCTION AND DEVELOPMENT

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各種コード

  • NII論文ID(NAID)
    10021218742
  • NII書誌ID(NCID)
    AA10936678
  • 本文言語コード
    ENG
  • 資料種別
    REV
  • ISSN
    09168818
  • NDL 記事登録ID
    9470083
  • NDL 雑誌分類
    ZR22(科学技術--農林水産--畜産)
  • NDL 請求記号
    Z54-H305
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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