删除用于 de novo NAD生物合成的酶加速了卵巢衰老
Qingling Yang1,2,3, Hui Li1,2,3, Huan Wang1,2,3
1Center for Reproductive Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.
Aging cell
|June 19, 2023
概括
破坏 de novo 尼古丁胺胺氨基二核酸 (NAD+) 合成加速卵巢衰老,并损害小鼠的生育能力. 通过尼古丁胺 рибоoside (NR) 提高NAD+水平,改善了卵巢储备和卵细胞质量.
科学领域:
- 生殖生物学 生殖生物学
- 衰老的研究研究.
- 代谢途径 代谢途径
背景情况:
- 尼古丁胺胺二核酸 (NAD+) 对于细胞功能至关重要,并与衰老有关.
- 新的NAD+生物合成在卵巢衰老中的特定作用仍然在很大程度上未被探索.
研究的目的:
- 研究新的NAD+生物合成基因对卵巢衰老和女性生育能力的影响.
- 探索潜在的机制,包括线粒体功能和卵细胞质量.
主要方法:
- 在小鼠中,对氨酸-2,3-二氧化酶1 (Ido1) 或酸酸转移酶 (Qprt) 的基因切除.
- 评估卵巢NAD+水平,雌性周期,卵巢储备和卵细胞质量.
- 卵巢组织的转录组分析和线粒体参数的评估.
- 与尼古丁胺胺 рибоoside (NR) 补充剂的干预.
主要成果:
- 切除Ido1或Qprt导致卵巢NAD+水平降低,低生育率,不规则的卵巢周期,卵巢储备减少和加快衰老.
- 卵细胞质量受损,反应性氧物种增加,形异常,受精减少,胚胎发育受损.
- 绝杀小鼠的线粒体代谢和功能发生了变化,由分布受损和膜潜能降低所证明.
- 在突变小鼠中,NR补充改善了卵巢衰老表型和改善了卵细胞质量.
结论:
- 新的NAD+生物合成途径对于维持中年雌性小鼠的卵巢功能和生育能力至关重要.
- 缺陷的NAD+合成会对卵细胞质量和线粒体健康产生负面影响,导致卵巢衰老加速.
- 增加NAD+的策略,如NR补充剂,显示了缓解与年龄相关的生育能力下降的治疗潜力.
更多相关视频
14:26A Method to Study the Impact of Chemically-induced Ovarian Failure on Exercise Capacity and Cardiac Adaptation in Mice
Published on: April 7, 2014
15.5K
06:49Orthotopic Ovarian Transplantation Procedures to Investigate the Life- and Health-span Influence of Ovarian Senescence in Female Mice
Published on: February 12, 2018
10.9K
相关概念视频
Oogenesis
63.9K
In human women, oogenesis produces one mature egg cell or ovum for every precursor cell that enters meiosis. This process differs in two unique ways from the equivalent procedure of spermatogenesis in males. First, meiotic divisions during oogenesis are asymmetric, meaning that a large oocyte (containing most of the cytoplasm) and minor polar body are produced as a result of meiosis I, and again following meiosis II. Since only oocytes will go on to form embryos if fertilized, this unequal...
63.9K
Meiosis I
40.9K
Meiosis is the division of a diploid cell into haploid cells forming sperm and eggs in animals through differentiation. Meiosis I is the first stage of meiosis, where the genetic recombination of homologous chromosomes and the reduction of the ploidy level by half occurs.
Prophase I is the most extended and complex step of meiosis I characterized by synapsis, chromosome pairing, and recombination of the homologous chromosomes. This process is facilitated by a proteinaceous structure called the...
Prophase I is the most extended and complex step of meiosis I characterized by synapsis, chromosome pairing, and recombination of the homologous chromosomes. This process is facilitated by a proteinaceous structure called the...
40.9K
Replicative Cell Senescence
3.7K
Replicative cell senescence is a property of cells that allows them to divide a finite number of times throughout the organism's lifespan while preventing excessive proliferation. Replicative senescence is associated with the gradual loss of the telomere — short, repetitive DNA sequences found at the end of the chromosomes. Telomeres are bound by a group of proteins to form a protective cap on the ends of chromosomes. Embryonic stem cells express telomerase — an enzyme that adds...
3.7K
Biosynthesis of Nucleic Acids
88
Nucleic acid biosynthesis is a fundamental biochemical process that produces the purine and pyrimidine nucleotides essential for DNA and RNA synthesis. This pathway maintains a balanced nucleotide pool, preventing imbalances that could jeopardize genetic integrity and cellular function. Given the crucial role of nucleotides, their synthesis is tightly regulated to ensure proper cellular homeostasis.Purine BiosynthesisThe biosynthesis of purine nucleotides begins with ribose-5-phosphate, a...
88
The Nucleolus
8.9K
The nucleolus is the most prominent substructure of the nucleus. When it was first discovered, it was considered to be an isolated organelle that forms fibrils and granules. In 1931, the relationship between the nucleolus and chromosomes was first described by Heitz. He observed that the appearance and size of nucleolus varies depending on the stage of the cell cycle. He also noticed constricted regions on different chromosomes clustered together at definite cell cycle stages. These regions,...
8.9K
Mitochondria
14.0K
Mitochondria are eukaryotic cellular organelles that are known to produce energy through a process called oxidative phosphorylation. Besides their primary function, mitochondria are involved in various cellular processes, including cell growth, differentiation, signaling, metabolism, and senescence. Age-related changes cause a decline in mitochondrial quality and integrity due to increased mitochondrial mutations and oxidative damage. Thus, aging can severely impact mitochondrial functions,...
14.0K
