聚化在肝细胞中的老化缓冲器
Kelvin Yin1, Maren Büttner2, Ioannis K Deligiannis1
1Helmholtz Pioneer Campus (HPC), Helmholtz Munich, Neuherberg, Germany.
Journal of hepatology
|April 7, 2024
概括
鼠标肝细胞中的多重积分通过创造不同的细胞状态来缓冲与年龄相关的衰退. 带有野生类型基因的四体细胞有助于在衰老过程中恢复正常的肝功能.
科学领域:
- 肝细胞生物学 肝细胞生物学
- 衰老的研究研究.
- 基因组学就是基因组学.
背景情况:
- 肝细胞中的多重积分是一种拟议的缓冲转录失调的机制.
- 在衰老过程中,多化在调节肝细胞基因调节网络中的作用需要进一步研究.
研究的目的:
- 为了证明多化在调节衰老期间肝细胞中的基因调节网络中的作用.
- 为了研究在老化过程中在非有害的遗传干扰的小鼠肝脏中的性动力学.
主要方法:
- 肝细胞核的单核RNA测序,从年轻和老的野生类型小鼠中跨越不同的ploidy水平.
- 基因表达和调节网络与对HNF4A,CEBPA或CTCF具有哈普洛因不足的菌株进行比较.
- 通过BaseScope对肝脏部分的组织学评估和基因组基因组合分析.
主要成果:
- 野生类型小鼠的衰老会增加肝细胞多重积分和脂肪.
- 对HNF4A或CEBPA的哈普洛因不足丰富了四平状肝细胞,影响了调节网络并抑制了与年龄相关的肥胖症.
- 老龄化HNF4A-haploinsufficient小鼠中的四化肝细胞选择野生类型的等位基因,恢复遗传干扰.
结论:
- 多化会产生独特的肝细胞细胞状态,缓冲与年龄相关的衰退.
- 多倍体转换通过非随机的等位基因分离促进了多倍体缓冲,以恢复野生类型的基因组.
- 操纵 ploidy 动态可能为与年龄有关的肝功能障碍提供治疗干预措施.
相关概念视频
01:24Liver Regeneration
3.3K
The liver is an important organ in vertebrates that plays an essential role in metabolism. It is also responsible for storing and redistributing nutrients such as carbohydrates, fats, and vitamins in the body. Additionally, the liver releases bile salts which are critical for digesting food and eliminating toxic metabolites from the body.
Cells of Liver
The liver comprises four major types of cells— hepatocytes, stellate, Kupffer, and sinusoidal endothelial cells. The hepatocytes are...
Cells of Liver
The liver comprises four major types of cells— hepatocytes, stellate, Kupffer, and sinusoidal endothelial cells. The hepatocytes are...
3.3K
01:23Tissue Renewal without Stem Cells
1.7K
After cellular or tissue damage, the resident stem cells present in the human body can locally repair and regenerate the damaged tissue or organ. However, even though some tissues do not have stem cells, they can repair and regenerate with the help of pre-existing cells. For example, beta cells of the pancreas and hepatocytes of the liver can divide to renew and regenerate the tissue. Here, both cell division and cell death are well regulated by homeostasis.
However, failure of such a system...
However, failure of such a system...
1.7K
02:15Replicative Cell Senescence
3.6K
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...
3.6K
01:22iPS Cell Differentiation
2.7K
The ability of induced pluripotent stem cells or iPSCs to differentiate into most body cell types has stimulated repair and regenerative medicine research over the past few decades. iPSC-derived blood cells, hepatocytes, beta islet cells, cardiomyocytes, neurons, and other cell types can repair injuries or regenerate damaged tissue in diseases such as diabetes and neurodegenerative disorders.
2.7K
01:21Nondisjunction
3.8K
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...
3.8K
03:17Inheritance of Chromatin Structures
6.2K
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...
6.2K