怀孕前的肥胖症重编程后代的骨肌肉纤维过渡通过H3K9me3
Yichi Wu1,2, Sujuan Li1,2, Jingyi Zhang1,2
1Department of Pediatrics Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China.
Journal of cachexia, sarcopenia and muscle
|April 21, 2025
概括
怀孕期间的孕产妇肥胖会改变后代的骨肌肉,改变纤维类型和损害线粒体. 这与减少的IDH2表达有关,这表明代谢健康干预的目标.
科学领域:
- 代谢障碍 代谢障碍 代谢障碍
- 发育生物学是发展生物学.
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 孕产妇的肥胖是后代肥胖和代谢疾病的危险因素.
- 孕产妇肥胖对骨肌肉纤维发育的影响尚不清楚.
- 骨肌肉对于全身代谢调节至关重要.
研究的目的:
- 研究母亲高脂肪饮食 (HFD) 如何影响后代的骨肌肉纤维组成和代谢功能.
- 阐明这些变化背后的分子机制,包括潜在的表观遗传调节.
主要方法:
- 他们使用了小鼠模型,比较母亲食 (CD) 与高脂肪饮食 (HFD) 的后代.
- 骨肌的分析包括RNA测序,qPCR,西部斑块和ChIP-qPCR.
- 为了验证发现,进行了体外和体内实验 (siRNA,lentiviral vectors).
主要成果:
- 肥胖母亲的后代显示,肌肉纤维从缓慢抽转为快速抽,葡萄糖耐受性受损,胰岛素耐药性和线粒体功能障碍.
- RNA测序揭示了后代骨肌肉中异酸脱酶2 (IDH2) 的显著下调.
- 抑制IDH2与线粒体生物发生障碍和氧化应激增加有关,而恢复IDH2改善了肌肉纤维组成和葡萄糖代谢.
- 表观遗传学分析显示,IDH2促进体的H3K9me3基因组修饰增加,这表明了跨代调节.
结论:
- 孕前母亲的肥胖会导致骨肌纤维过渡缓慢而快速,并导致后代的线粒体功能障碍.
- 这种代谢转变是由IDH2抑制介导的,可能是通过H3K9me3介导的表观遗传变化.
- 针对IDH2提供了一种潜在的治疗策略,以抵消肥胖母亲后代代代谢功能障碍.
更多相关视频
14:56Sample Preparation to Bioinformatics Analysis of DNA Methylation: Association Strategy for Obesity and Related Trait Studies
Published on: May 6, 2022
4.3K
08:34Mechanism of Regulation of Adipocyte Numbers in Adult Organisms Through Differentiation and Apoptosis Homeostasis
Published on: June 3, 2016
14.9K
相关概念视频
Genomic Imprinting and Inheritance
32.8K
Diploid organisms inherit genetic material through chromosomes from both parents. Copies of the same gene are known as alleles. In most cases, both alleles are simultaneously expressed and allow various cellular processes to function optimally. If one of the alleles is missing or mutated, the expression of the other allele can compensate; however, this is not true for all genes.
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
32.8K
Formation of Muscle Fibers from Myoblasts
3.7K
De novo myogenesis, or the formation of muscle fibers, begins during the early embryonic stages. The skeletal muscle is formed from somites– blocks of embryonic cell layers. The somites are further divided into dermatomes, myotomes, sclerotomes, and syndetomes. Among these, the myotomes give rise to muscle fibers.
Muscle progenitor cells (MPCs) are formed from the myotomes. MPCs express genes that encode the transcription factors Pax3 and Pax7. Along with Pax 3/7, other transcription...
Muscle progenitor cells (MPCs) are formed from the myotomes. MPCs express genes that encode the transcription factors Pax3 and Pax7. Along with Pax 3/7, other transcription...
3.7K
Epigenetic Regulation
2.9K
Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
X-chromosome...
X-chromosome...
2.9K
Obesity
307
The Body Mass Index (BMI) is a numerical value derived from a person's weight and height, used to categorize individuals into weight ranges. It is calculated using the formula: weight in kilograms divided by height in meters squared. Obesity is a health condition characterized by excessive accumulation of adipose tissue that poses health risks, often diagnosed with a BMI ≥ 30. This excess fat storage occurs when surplus dietary calories are converted into triglycerides and stored in...
307
Inheritance of Chromatin Structures
6.1K
Epigenetics is the study of inherited changes in a cell's phenotype without changing the DNA sequences. It provides a form of memory for the differential gene expression pattern to maintain cell lineage, position-effect variegation, dosage compensation, and maintenance of chromatin structures such as telomeres and centromeres. For example, the structure and location of the centromere on chromosomes are epigenetically inherited. Its functionality is not dictated or ensured by the underlying...
6.1K
Nondisjunction
3.6K
Nondisjunction is the failure of homologous chromosomes or sister chromatids to separate correctly and move to the opposite poles of the cells. This produces daughter cells with abnormal chromosome numbers. Nondisjunction is common during anaphase I or anaphase II of meiosis. Mutations in synaptonemal complex proteins that attach homologous chromosomes increase the chances of nondisjunction in anaphase I of meiosis I. In contrast, mutations in topoisomerases and condensins that hold...
3.6K
