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Involvement of insulin-like growth factor 2 in angiogenic factor transcription in bi-maternal mouse conceptuses

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Title: Involvement of insulin-like growth factor 2 in angiogenic factor transcription in bi-maternal mouse conceptuses
Authors: Kawahara, Manabu Browse this author
Wu, Qiong Browse this author
Kono, Tomohiro Browse this author
Keywords: Angiogenic factors
Insulin-like growth factor 2 (Igf2)
Serial nuclear transfer
Issue Date: Feb-2010
Publisher: 日本繁殖生物学会
Journal Title: Journal of Reproduction and Development
Volume: 56
Issue: 1
Start Page: 79
End Page: 85
Publisher DOI: 10.1262/jrd.09-140A
Abstract: Imprinted genes in which only one of the two parental chromosome copies is expressed have a substantial effect on mammalian ontogenesis. On mouse distal chromosome 7, the paternally expressed gene insulin-like growth factor 2 (Igf2) is separated by approximate 100 kb from the maternally expressed non-coding gene H19. However, there is limited knowledge of the manner in which Igf2 transcription affects the other genes involved in embryonic development. To clarify this, we performed quantitative gene expression analysis for representative angiogenic factors—Vegf, Flt1, Flt4, Flk1, Ang1, Ang2, Tie1, and Tie2—for 3 types of bi-maternal conceptuses containing genomes with non-growing (ng) and fully grown (fg) oocytes. The genetic backgrounds of the ng oocytes were 1) the wild type (ngwt), 2) mutant mice carrying a 3-kb deletion of the H19 transcription unit (ngH19Δ3-KO/fg) and 3) mutant mice carrying a 13-kb deletion in the H19 transcription unit, including the germline-derived differentially methylated region on chromosome 7 (ngH19Δ13-KO/fg). In the ngwt/fg and ngH19Δ3-KO/fg placentae, Vegf and Flt1 were upregulated compared with the mean value for the wt placenta, whereas in the ngH19Δ13-KO/fg placenta, these transcriptional levels were restored. In the fetus, however, only 2 genes among the 8 genes analyzed were significantly changed in the bi-maternal fetuses, indicating that the effects of the Igf2 mRNA level on angiogenic factor transcription in the fetus differed from those in the placenta. Our results indicated that the Igf2 mRNA level affects transcription of angiogenic factors in both bi-maternal placentae and fetuses.
Type: article
Appears in Collections:農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 川原 学

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