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Retention of paternal DNA methylome in the developing zebrafish germline
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Retention of paternal DNA methylome in the developing zebrafish germline
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Retention of paternal DNA methylome in the developing zebrafish germline
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Journal Article
Retention of paternal DNA methylome in the developing zebrafish germline
2019
Overview
Two waves of DNA methylation reprogramming occur during mammalian embryogenesis; during preimplantation development and during primordial germ cell (PGC) formation. However, it is currently unclear how evolutionarily conserved these processes are. Here we characterise the DNA methylomes of zebrafish PGCs at four developmental stages and identify retention of paternal epigenetic memory, in stark contrast to the findings in mammals. Gene expression profiling of zebrafish PGCs at the same developmental stages revealed that the embryonic germline is defined by a small number of markers that display strong developmental stage-specificity and that are independent of DNA methylation-mediated regulation. We identified promoters that are specifically targeted by DNA methylation in somatic and germline tissues during vertebrate embryogenesis and that are frequently misregulated in human cancers. Together, these detailed methylome and transcriptome maps of the zebrafish germline provide insight into vertebrate DNA methylation reprogramming and enhance our understanding of the relationships between germline fate acquisition and oncogenesis.
Germ cells are the means of transferring genetic information to the next generation. Here the authors characterise the DNA methylomes of zebrafish primordial germ cells and find that, unlike mammals, the zebrafish germ cells do not undergo genome-wide DNA demethylation but rather retain paternal DNA methylation patterns
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
/ 45/22
/ 45/23
/ 45/91
/ 64
/ 64/116
/ Animals
/ Animals, Genetically Modified
/ DNA
/ Embryonic Development - genetics
/ Epigenesis, Genetic - physiology
/ Gene Expression Regulation, Developmental - genetics
/ Germ Cells - growth & development
/ Humanities and Social Sciences
/ Mammals
/ Promoter Regions, Genetic - genetics
/ Science
