| Budget Amount *help |
¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2012: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Outline of Final Research Achievements |
Xenopus siamois is a homeobox gene cording for a transcriptional mediator of the dorsal Wnt signaling pathway and is necessary for the head formation. Despite its importance in Xenopus development, no siamois-related genes have been found in other taxa. In this study, I found a novel siamois-related gene, dioskouroi, in bichir. The bichir gene, which is different from siamois, plays roles in not only organizer formation but also endoderm differentiation endogenously. These results lead to a hypothesis that the siamois-related protogene in a common ancestor of bony fishes played central role in early embryogenesis. The protogene as a Wnt signal mediator might be derived into Xenopus siamois which play a role in head formation and bichir dioskouroi which play a role in endoderm differentiation.
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