Extra-embryonic-specific imprinted expression is restricted to defined lineages in the post-implantation embryo
Autor: | Marisa S. Bartolomei, Romana Bittner, Tomasz M. Kulinski, Christine I.M. Seidl, Ru Huang, Denise P. Barlow, Quanah J. Hudson, Katarzyna E. Warczok |
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Rok vydání: | 2011 |
Předmět: |
DNA (Cytosine-5-)-Methyltransferase 1
Male Organic Cation Transport Proteins Genomic imprinting Placenta Biology Article Epigenesis Genetic Mice Pregnancy medicine Animals DNA (Cytosine-5-)-Methyltransferases Epigenetics Yolk sac Non-coding RNA Molecular Biology DNA Primers Mice Knockout Base Sequence Models Genetic Endoderm Gene Expression Regulation Developmental Organic Cation Transporter 2 Embryo Cell Biology DNA Methylation Embryonic stem cell Molecular biology Cell biology Mice Inbred C57BL medicine.anatomical_structure Mice Inbred DBA Multigene Family DNA methylation Female Insulator Developmental Biology |
Zdroj: | Developmental Biology. 353:420-431 |
ISSN: | 0012-1606 |
Popis: | A subset of imprinted genes in the mouse have been reported to show imprinted expression that is restricted to the placenta, a short-lived extra-embryonic organ. Notably, these so-called “placental-specific” imprinted genes are expressed from both parental alleles in embryo and adult tissues. The placenta is an embryonic-derived organ that is closely associated with maternal tissue, and as a consequence, maternal contamination can be mistaken for maternal-specific imprinted expression. The complexity of the placenta, which arises from multiple embryonic lineages, poses additional problems in accurately assessing allele-specific repressive epigenetic modifications in genes that also show lineage-specific silencing in this organ. These problems require that extra evidence be obtained to support the imprinted status of genes whose imprinted expression is restricted to the placenta. We show here that the extra-embryonic visceral yolk sac (VYS), a nutritive membrane surrounding the developing embryo, shows a similar “extra-embryonic–lineage-specific” pattern of imprinted expression. We present an improved enzymatic technique for separating the bilaminar VYS and show that this pattern of imprinted expression is restricted to the endoderm layer. Finally, we show that VYS “extra-embryonic–lineage-specific” imprinted expression is regulated by DNA methylation in a similar manner as shown for genes showing multi-lineage imprinted expression in extra-embryonic, embryonic, and adult tissues. These results show that the VYS is an improved model for studying the epigenetic mechanisms regulating extra-embryonic–lineage-specific imprinted expression. |
Databáze: | OpenAIRE |
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