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- W1991206912 abstract "Genomic imprinting causes parental-origin-specific monoallelic transcription of a subset of mammalian genes in the embryo and adult. There is conflicting evidence, however, for the monoallelic transcription of some imprinted genes, such as Igf2, in pre-implantation embryos.We have developed an allele-specific fluorescence in situ hybridization method which involves a pair of oligonucleotide probes designed to detect an intronic polymorphism. The method, called ASO-RNA-FISH, enabled us to distinguish allelic nascent Igf2 transcripts in the cell nuclei of early mouse embryos, avoiding signals from the stored oocyte-specific transcripts. Igf2 transcription was first detectable in two-cell embryos, and biallelic transcription was predominant up to the morula stage. Then, the maternal allele became silenced during the blastocyst stage. When embryos were cultured in vitro, however, a strong bias to maternal transcription was observed up to the morula stage.ASO-RNA-FISH revealed that a transition of Igf2 from biallelic to monoallelic transcription occurs in the blastocyst stage. This developmental regulation was modified temporarily by in vitro culture, suggesting a possible link between altered imprinting and abnormalities of the foetuses experienced in vitro culture. ASO-RNA-FISH is therefore a powerful technique for the study of allele-specific gene expression." @default.
- W1991206912 created "2016-06-24" @default.
- W1991206912 creator A5024057178 @default.
- W1991206912 creator A5040966471 @default.
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- W1991206912 date "2001-03-01" @default.
- W1991206912 modified "2023-10-16" @default.
- W1991206912 title "Allele-specific detection of nascent transcripts by fluorescence<i>in situ</i>hybridization reveals temporal and culture-induced changes in<i>Igf2</i>imprinting during pre-implantation mouse development" @default.
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- W1991206912 doi "https://doi.org/10.1046/j.1365-2443.2001.00417.x" @default.
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