ArticleNature communications2026
Establishment of DNA methylation during primate germ cell development.
Article in Nature communications, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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26 authors.
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Abstract
DNA methylation is almost completely erased throughout the genome in primordial germ cells, and then reestablished during mammalian germ cell development. In this study, we demonstrate that in three primate species-marmosets, macaques, and humans-de novo methylation occurs postnatally in prospermatogonia in males and growing oocytes in females. In monkey prospermatogonia, de novo methylation is a prolonged process spanning 6 months to 1 year, primarily occurring within the first year after birth. In human testes, this process may occur more slowly over an extended period. Single-cell bisulfite sequencing analyses in spermatogonia of three species revealed that all genomic regions acquire DNA methylation gradually. However, DNA methylation levels increase faster in genic regions compared to intergenic regions. Unlike in mice, mitotic divisions occur during the establishment of methylation in prospermatogonia. The established methylation is likely maintained because maintenance methyltransferase DNMT1 is specifically expressed during the mitotic stage. Our findings show notable differences in the de novo DNA methylation processes in male germ cells between mice and primates.
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