Ingunn Mørk Jermstad

• Doncheva, Atanaska; Higa, Ryoko; Khanal, Prabhat; Ingebrigtsen, Martine Villemo Øksenvåg; Li, Yuchuan & Kolan, Shrikant [Vis alle 16 forfattere av denne artikkelen] (2025). Elevated adipose inflammation, but reduced hepatic triacylglycerol storage in diet-induced obese Plin4/mice. Journal of Biological Chemistry. ISSN 0021-9258. 302(2). doi: 10.1016/j.jbc.2025.111043. Fulltekst i vitenarkiv
• Fosslie, Madeleine Lystad; Ilaslan, Erkut; Skuland, Trine; Choudalakis, Michel; Søegaard, Mirra Louise Cicilie & Halliwell, Jason Alexander [Vis alle 23 forfattere av denne artikkelen] (2025). Major waves of H2A.Z incorporation during mouse oogenesis and preimplantation embryo development. Nature Communications. 17(1). doi: 10.1038/s41467-025-66919-x. Fulltekst i vitenarkiv Vis sammendrag

  Abstract Epigenomes of mammalian oocytes and embryos undergo major transitions essential for successful development. Here, we provide genome-wide maps of histone variant H2A.Z during twelve stages of mouse oogenesis and preimplantation embryo development and relate it to histone marks and genomic features. This revealed that major waves of H2A.Z incorporation occur early in growing oocytes, forming distinct patterns of maternal, embryonic, and persistent H2A.Z enrichment. Late maternal enrichment is inherited by the zygote and precedes reduced formation of lamina associated domains and early replication in the maternal genome of 2-cell embryos. Persistent H2A.Z enrichment is strongly associated with CpG islands and H3K4me3 near transcription start sites of active genes, but thousands of maternal and embryonic H2A.Z incorporation sites exist elsewhere, frequently at transposable elements. The persisting H2A.Z enrichments across related developmental stages enable preservation of epigenetic information despite major concurrent changes in H3K4me3, H3K27me3, and DNA methylation. Altogether, this advances our understanding of how histone variants contribute to epigenetic reprogramming during mammalian oogenesis and early development.

• Li, Yanjiao; Wang, Yunhao; Vera-Rodriguez, Maria; Lindeman, Leif Christopher; Skuggen, Linda Ellevog & Rasmussen, Erik Magne Koscielniak [Vis alle 21 forfattere av denne artikkelen] (2023). Single-cell m6A mapping in vivo using picoMeRIP–seq. Nature Biotechnology. ISSN 1087-0156. doi: 10.1038/s41587-023-01831-7. Fulltekst i vitenarkiv Vis sammendrag

  Abstract Current N 6 -methyladenosine (m 6 A) mapping methods need large amounts of RNA or are limited to cultured cells. Through optimized sample recovery and signal-to-noise ratio, we developed picogram-scale m 6 A RNA immunoprecipitation and sequencing (picoMeRIP–seq) for studying m 6 A in vivo in single cells and scarce cell types using standard laboratory equipment. We benchmark m 6 A mapping on titrations of poly(A) RNA and embryonic stem cells and in single zebrafish zygotes, mouse oocytes and embryos.

• Wang, Yunhao; Li, Yanjiao; Skuland, Trine; Zhou, Chengjie; Li, Aifu & Hashim, Adnan [Vis alle 13 forfattere av denne artikkelen] (2023). The RNA m6A landscape of mouse oocytes and preimplantation embryos. Nature Structural & Molecular Biology. ISSN 1545-9993. 30(5), s. 703–709. doi: 10.1038/s41594-023-00969-x. Fulltekst i vitenarkiv Vis sammendrag

  Despite the significance of N6-methyladenosine (m6A) in gene regulation, the requirement for large amounts of RNA has hindered m6A profiling in mammalian early embryos. Here we apply low-input methyl RNA immunoprecipitation and sequencing to map m6A in mouse oocytes and preimplantation embryos. We define the landscape of m6A during the maternal-to-zygotic transition, including stage-specifically expressed transcription factors essential for cell fate determination. Both the maternally inherited transcripts to be degraded post fertilization and the zygotically activated genes during zygotic genome activation are widely marked by m6A. In contrast to m6A-marked zygotic ally-activated genes, m6A-marked maternally inherited transcripts have a higher tendency to be targeted by microRNAs. Moreover, RNAs derived from retrotransposons, such as MTA that is maternally expressed and MERVL that is transcriptionally activated at the two-cell stage, are largely marked by m6A. Our results provide a foundation for future studies exploring the regulatory roles of m6A in mammalian early embryonic development.

• Dahl, John Arne; Jung, Inkyung; Aanes, Håvard; Greggains, Gareth; Manaf, Adeel & Lerdrup, Mads [Vis alle 20 forfattere av denne artikkelen] (2016). Broad histone H3K4me3 domains in mouse oocytes modulate maternal-to-zygotic transition. Nature. ISSN 0028-0836. 537(7621), s. 548–552. doi: 10.1038/nature19360. Fulltekst i vitenarkiv

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• Catterall, Tara Cherie; Johnson, Inna; Khan, Shaista; Jermstad, Ingunn; Nesse, Gaute & Klungland, Arne [Vis alle 7 forfattere av denne artikkelen] (2015). The Norwegian Transgenic Centre. Fulltekst i vitenarkiv
• Khan, Shaista; Jermstad, Ingunn; Catterall, Tara Cherie; Nesse, Gaute; Klungland, Arne & Dalen, Knut Tomas (2014). The Norwegian Transgenic Centre. Fulltekst i vitenarkiv

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