Evidence map›Paper›PMID 39354016›Full record

ArticleCommunications biology2024

Maintaining mitochondrial DNA copy number mitigates ROS-induced oocyte decline and female reproductive aging.

Shiyun Long, Yunchao Zheng, Xiaoling Deng, Jing Guo, Zhe Xu, Karin Scharffetter-Kochanek, Yanmei Dou, Min Jiang

Abstract read
In one paragraph

Article in Communications biology, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers.

0numbers the graph read from it
0cells of the map it votes in
28citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

28 citing papers in PubMed.

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  18. Abundance of Maternal Mitochondrial Genome Is Dispensable up to the Mitochondrial Genome Activation in Post-Implantation Embryos.FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2025
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors.

Shiyun Long *College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang, China.
Yunchao Zheng *Westlake Laboratory of Life Sciences and Biomedicine, Hangzhou, Zhejiang, China.
Xiaoling DengWestlake Laboratory of Life Sciences and Biomedicine, Hangzhou, Zhejiang, China.
Jing GuoNHC Key Laboratory of Human Stem Cell and Reproductive Engineering, School of Basic Medical Sciences, Central South University, Changsha, Hunan, China.
Zhe XuWestlake Laboratory of Life Sciences and Biomedicine, Hangzhou, Zhejiang, China.
Karin Scharffetter-KochanekKlinik für Dermatologie und Allergologie, Universitätsklinikum Ulm, Albert-Einstein-Allee 23, 89081, Ulm, Deutschland.
Yanmei DouWestlake Laboratory of Life Sciences and Biomedicine, Hangzhou, Zhejiang, China. douyanmei@westlake.edu.cn.ORCID 0000-0002-9328-1731
Min JiangWestlake Laboratory of Life Sciences and Biomedicine, Hangzhou, Zhejiang, China. jiangmin@westlake.edu.cn.ORCID 0000-0002-7005-937X

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Oocytes play a crucial role in transmitting maternal mitochondrial DNA (mtDNA), essential for the continuation of species. However, the effects of mitochondrial reactive oxygen species (ROS) on mammalian oocyte maturation and mtDNA maintenance remain unclear. We investigated this by conditionally knocking out the Sod2 gene in primordial follicles, elevating mitochondrial matrix ROS levels from early oocyte stages. Our data indicates that reproductive aging in Sod2 conditional knockout females begins at 6 months, with oxidative stress impairing oocyte quality, particularly affecting OXPHOS complex II and mtDNA-encoded mRNA levels. Despite unchanged mtDNA mutation load, mtDNA copy numbers exhibited significant variations. Strikingly, reducing mtDNA copy numbers by reducing mtSSB protein, crucial for mtDNA replication, accelerated reproductive aging onset to three months, underscoring the critical role of mtDNA copy number maintenance under oxidative stress conditions. This research provides new insights into the relationship among mitochondrial ROS, mtDNA, and reproductive aging, offering potential strategies for delaying aging-related fertility decline.

Indexed as

AgingDNA, MitochondrialOocytesReactive Oxygen SpeciesAnimalsDNA Copy Number VariationsFemaleMiceMice, KnockoutMitochondriaOxidative StressReproductionSuperoxide DismutaseSuperoxide Dismutase 2DNA, MitochondrialReactive Oxygen SpeciesSuperoxide DismutaseSuperoxide Dismutase 2

Identifiers

PMID39354016
PMCPMC11445474

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.