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Chromatin Immunoprecipitation Assay for Tissue-specific Genes using Early-stage Mouse Embryos
Published on: April 29, 2011
Gatm, a creatine synthesis enzyme, is imprinted in mouse placenta
Lisa L Sandell1, Xiao-Juan Guan, Robert Ingram
1Howard Hughes Medical Institute and Department of Molecular Biology, Princeton University, Princeton, NJ 08544, USA. lsandell@molbio.princeton.edu
Summary
Researchers discovered the Gatm gene, crucial for creatine synthesis, is imprinted in mouse placenta and yolk sac. This finding links epigenetic gene regulation and creatine metabolism in mammalian embryonic development.
Area of Science:
- Genetics
- Developmental Biology
- Epigenetics
Background:
- Genomic imprinting and epigenetic gene regulation are vital for mammalian development.
- Identifying novel imprinted genes enhances understanding of these processes.
Purpose of the Study:
- To identify new imprinted genes involved in epigenetic regulation.
- To investigate the role of the Gatm gene in imprinting and creatine metabolism.
Main Methods:
- Genomic screening for novel imprinted genes.
- Analysis of Gatm gene expression in mouse embryonic tissues, placenta, and yolk sac.
- Investigated methylation status of CpG islands near Gatm.
Main Results:
- Identified Gatm (l-arginine:glycine amidinotransferase), a key enzyme in creatine synthesis, as a novel imprinted gene.
- Gatm imprinting was observed in the placenta and yolk sac, but not in embryonic tissues.
- Genes near Gatm (Duox1-2, Slc28a2, Slc30a4, LOC214616) showed no evidence of imprinting in the placenta.
- CpG islands associated with Gatm and a neighboring gene were found to be unmethylated.
Conclusions:
- Gatm is a newly identified imprinted gene in mammals.
- This discovery establishes a novel link between genomic imprinting and creatine metabolism during embryonic development.
