| Budget Amount *help |
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2015: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
Fiscal Year 2014: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
Fiscal Year 2013: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
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| Outline of Final Research Achievements |
We recently developed technology termed “pronuclear injection (PI)-based Targeted Transgenesis (PITT)” that allows targeted insertion of single-copy transgene into the predetermined locus through PI. PITT method enables to generate Tg mice showing reliable transgene expression pattern. Here, we developed an improved-PITT (i-PITT) system by combining Cre-loxP and PhiC31-attP/B systems directly under C57BL/6N inbred strain. The targeted Tg efficiency in the i-PITT was improved up to 67%, which is by-far the best Tg rate reported. Furthermore, the system could generate multiple Tg mice simultaneously: injection of up to three different Tg cassettes in a single injection session into as less as 181 zygotes resulted in production of all three separate Tg DNA containing targeted Tg mice. Standard protocol for PITT was published and the seed mouse strain is available from RIKEN BRC.
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