Expression of Foreign Genes in Lamprey Embryos: An Approach to Study Evolutionary Changes in Gene Regulation
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概要
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Evolution in development can be viewed as a sequence of changes in gene regulation. To investigate the cross-species compatibility of 5’ upstream regulatory regions, we introduced exogenous gene constructs derived from a gnathostome genome into fertilized eggs of the Japanese lamprey, Lampetra japonica, a sister group of the gnathostomes. Eggs were injected with gene constructs in which a sequence encoding the green fluorescent protein (GFP) had been located downstream of either a virus promoter or 5’ regulatory regions of medaka actin genes. Reporter gene expression was recorded for more than a month starting two days after injection. Although the expression patterns were highly mosaic and differed among individuals, GFP was expressed predominantly in the striated muscles of lamprey embryos when driven by the 5’ upstream regions of the medaka muscle actin genes. This implies that a pan-vertebrate muscle-specific gene regulatory mechanism may have evolved before the agnathan/gnathostome divergence. This gene-transfer technique potentially facilitates the visualization of cells in various differentiating tissues throughout development. The introduction of developmental genes of the lamprey or other animals into lamprey embryos is another potentially important application, one that could provide us with information on the evolutionary changes in functions of genes or gene cascades. J. Exp. Zool. (Mol.Dev. Evol.) 296B:87–97, 2003
- Wiley-Liss, Inc.の論文
- 2003-03-20
著者
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Tochinai S
Hokkaido Univ. Sapporo Jpn
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Kuratani Shigeru
Lab. for Evol. Morph, RIKEN CDB
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Kuratani S
Lab. For Evol. Morph Riken Cdb
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Kuratani Shigeru
Department Of Anatomy Faculty Of Medicine University Of The Ryukyus
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Kusakabe R
Riken Kobe Jpn
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