The paternal methylation imprint of the mouse H19 locus is acquired in the gonocyte stage during foetal testis development

Takayuki Ueda, Kuniya Abe, Asuka Miura, Misako Yuzuriha, Mohamad Zubair, Motoko Noguchi, Katsutoshi Niwa, Yosuke Kawase, Tomohiro Kono, Yoichi Matsuda, Hirokazu Fujimoto, Hideo Shibata, Yoshihide Hayashizaki, Hiroyuki Sasaki

Research output: Contribution to journalArticlepeer-review

176 Citations (Scopus)

Abstract

Background: Germline-specific differential DNA methylation that persists through fertilization and embryonic development is thought to be the 'imprint' distinguishing the parental alleles of imprinted genes. If such methylation is to work as the imprinting mechanism, however, it has to be reprogrammed following each passage through the germline. Previous studies on maternally methylated genes have shown that their methylation imprints are first erased in primordial germ cells (PGCs) and then re-established during oocyte growth. Results: We have examined the timing of the reprogramming of the paternal methylation imprint of the mouse H19 gene during germ cell development. In both male and female PGCs, the paternal allele is partially methylated whereas the maternal allele is unmethylated. This partial methylation is completely erased in the female germline by entry into meiosis, establishing the oocyte methylation pattern. In the male germline, both alleles become methylated, mainly during the gonocyte stage, establishing the sperm methylation pattern. Conclusion: The paternal methylation imprint of H19 is established in the male germline and erased in the female germline at specific developmental stages. The identification of the timings of the methylation and demethylation should help to identify and characterize the biochemical basis of the reprogramming of imprinting.

Original languageEnglish
Pages (from-to)649-659
Number of pages11
JournalGenes to Cells
Volume5
Issue number8
DOIs
Publication statusPublished - 2000

All Science Journal Classification (ASJC) codes

  • Genetics
  • Cell Biology

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