Embryonic defects induced by maternal obesity in mice derive from Stella insufficiency in oocytes
- PMID: 29459681
- DOI: 10.1038/s41588-018-0055-6
Embryonic defects induced by maternal obesity in mice derive from Stella insufficiency in oocytes
Erratum in
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Publisher Correction: Embryonic defects induced by maternal obesity in mice derive from Stella insufficiency in oocytes.Nat Genet. 2018 May;50(5):768. doi: 10.1038/s41588-018-0077-0. Nat Genet. 2018. PMID: 29487399
Abstract
Maternal obesity can impair embryo development and offspring health, yet the mechanisms responsible remain poorly understood. In a high-fat diet (HFD)-based female mouse model of obesity, we identified a marked reduction of Stella (also known as DPPA3 or PGC7) protein in oocytes. Starting with this clue, we found that the establishment of pronuclear epigenetic asymmetry in zygotes from obese mice was severely disrupted, inducing the accumulation of maternal 5-hydroxymethylcytosine modifications and DNA lesions. Furthermore, methylome-wide sequencing analysis detected global hypomethylation across the zygote genome in HFD-fed mice, with a specific enrichment in transposon elements and unique regions. Notably, overexpression of Stella in the oocytes of HFD-fed mice not only restored the epigenetic remodeling in zygotes but also partly ameliorated the maternal-obesity-associated developmental defects in early embryos and fetal growth. Thus, Stella insufficiency in oocytes may represent a critical mechanism that mediates the phenotypic effects of maternal obesity in embryos and offspring.
Comment in
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Obesity: Link between maternal obesity and offspring is STELLA.Nat Rev Endocrinol. 2018 Apr;14(4):189. doi: 10.1038/nrendo.2018.26. Epub 2018 Mar 2. Nat Rev Endocrinol. 2018. PMID: 29498374 No abstract available.
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Eggs sense high-fat diet.Nat Genet. 2018 Mar;50(3):318-319. doi: 10.1038/s41588-018-0068-1. Nat Genet. 2018. PMID: 29511285 No abstract available.
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