ArticleReproduction (Cambridge, England)2024
O-GlcNAc participates in the meiosis of aging oocytes by mediating mitochondrial function.
Article in Reproduction (Cambridge, England), 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- A catalytically competent sperm PLCzeta variant causes fertilization failure through protein insufficiency.Journal of assisted reproduction and genetics · 2026Article
- Ubiquitinated proteomics reveals potential epigenetic-energy metabolism mechanisms in senescent ovarian granulosa cells of advanced maternal age.Journal of assisted reproduction and genetics · 2026Article
- Protein O-GlcNAcylation in reproductive biology and the impact of metabolic disease.Human reproduction update · 2025Review
- Review
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Authors and funding
13 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
In brief: O-GlcNAc plays an important role in many age-related diseases. This study shows that O-GlcNAc participates in oocyte aging and that reducing O-GlcNAc levels in aging oocytes improves oocyte quality. Abstract: With an increase in the mean age at parturition worldwide, female reproductive aging has become a key health problem. Advanced maternal age is reflected by decreased oocyte quality; however, the molecular mechanisms of oocyte aging are uncharacterized. O-linked N-acetylglucosamine (O-GlcNAc), a dynamic posttranslational modification, plays a critical role in the development of many age-related diseases; yet, it remains unclear whether and how O-GlcNAc participates in oocyte aging. Here, we found that global O-GlcNAc was elevated in normal biological aging mice oocytes (9 months), which were characterized by meiotic maturation failure and impaired mitochondrial function. Specifically, O-GlcNAc targeted the mitochondrial fission protein dynamic-related protein 1 to mediate mitochondrial distribution in the process of aging. Using the O-GlcNAcase (OGA) pharmacological inhibitor Thiamet-G and Oga knockdown (Oga-KD) to mimic the age-related high O-GlcNAc in young oocytes from 6-8 week-old mice mimicked the phenotype of oocyte aging. Moreover, reducing O-GlcNAc levels in aging oocytes restored spindle organization to improve oocyte quality. Our results demonstrate that O-GlcNAc is a key regulator of meiotic maturation that participates in the progression of oocyte aging.
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