相关实验视频
Updated: May 29, 2025
11:44
Author Spotlight: Exploring the Impact of Trauma on Cellular Aging
Published on: March 22, 2024
1.5K
血清生长分化因子15与白细胞端粒长度有负相关性
Jie Yu1, Yiwen Liu1, Huabing Zhang1
1Department of Endocrinology, Key Laboratory of Endocrinology of National Health Commission, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730.
The journal of nutrition, health & aging
|February 4, 2025
概括
增长分化因子15 (GDF15) 与白细胞端粒长度 (LTL) 有负相关,这是一个关键的衰老生物标志物. 这种关联在女性,超重个体和具有异常葡萄糖耐受性的人群中更为强烈,这表明GDF15
科学领域:
- 老年学和衰老研究研究.
- 衰老的生物标志物
- 分子生物学分子生物学
背景情况:
- 端粒长度 (TL) 和线粒体DNA拷贝数 (mtDNAcn) 是已确立的衰老生物标志物.
- 增长差异化因子15 (GDF15) 越来越多地被认为是它在衰老过程中的作用.
研究的目的:
- 研究GDF15水平与关键衰老生物标志物之间的关系:端粒长度 (TL) 和线粒体DNA拷贝数 (mtDNAcn).
- 探索影响这些关联的潜在人口和临床因素.
主要方法:
- 从北京 (2014-2021) 的纵向队列中对802名受试者的横截面分析.
- 使用实时PCR对血清GDF15,白细胞端粒长度 (LTL) 和mtDNAcn进行量化.
- 统计分析包括多变量线性回归和受限立方线模型.
主要成果:
- 较高的GDF15水平与年龄较大,腰围增加,血压较高,HbA1c升高,LTL较短以及较低mtDNAcn.趋势相关.
- 经过调整后的分析显示,GDF15和LTL之间存在显著的线性负相关性 (β = -0.120,p = 0.003).
- GDF15和LTL之间的负相关性在女性,超重个体和具有异常葡萄糖耐受性的受试者中更为明显.
结论:
- 在GDF15和白细胞端粒长度 (LTL) 之间存在显著的线性负相关性.
- 这种关系在特定的子组中尤为明显,包括女性,超重个体和具有异常葡萄糖耐受性的个体.
- 这些发现支持GDF15作为生物衰老可靠生物标志物的潜力.
相关概念视频
02:41Telomeres and Telomerase
23.0K
In eukaryotic DNA replication, a single-stranded DNA fragment remains at the end of a chromosome after the removal of the final primer. This section of DNA cannot be replicated in the same manner as the rest of the strand because there is no 3’ end to which the newly synthesized DNA can attach. This non-replicated fragment results in gradual loss of the chromosomal DNA during each cell duplication. Additionally, it can induce a DNA damage response by enzymes that recognize single-stranded...
23.0K
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
01:28Role of Hematopoietic Growth Factors
1.2K
Hematopoietic growth factors are molecules that regulate the differentiation rate of hematopoietic stem cells (HSCs). Erythropoietin (EPO), primarily produced by the kidneys, plays a crucial role in erythrocyte production. When oxygen levels in the blood are low, EPO is released into the bloodstream, reaching the bone marrow, where it stimulates HSCs to differentiate and mature into erythrocytes, which are vital for oxygen transport.
Thrombopoietin (TPO), mainly released by the liver,...
Thrombopoietin (TPO), mainly released by the liver,...
1.2K